161 results on '"J. Wiggins"'
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2. Overpublication as a symptom of audit culture: A comment on Phaf (2020)
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Joshua W. Clegg, Joseph A. Ostenson, and Bradford J. Wiggins
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History and Philosophy of Science ,Order (business) ,business.industry ,Audit ,Public relations ,business ,Psychology ,Publication ,General Psychology ,Advice (programming) - Abstract
Phaf suggests that, in order to address overpublication, academics should read more and publish less. Although many academics would like to take this advice, doing so is complicated by the audit culture that marketizes and metricizes everything they do. Working from the evolutionary metaphor introduced by Phaf, we argue that the evolution of science consists not simply in adapting theory to the demands of empirical investigation, but also in adapting scientific traditions and communities to the political and institutional forces that shape them. We point specifically to the generalized metrics (e.g., impact factors) that, in audit environments, arbitrate resources, in the process engineering professional precarity and overdetermining theory building. We argue that hyper-production can be understood as an adaptation to such an audit environment. We briefly discuss some suggestions for approaching the audit through relational accounting practices that disrupt and re-inscribe calculative audits, thus creating opportunities to read more and publish less.
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- 2020
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3. Shimming-the forgotten child of in-vivo MR?
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Changho Choi, Eva M. Ratai, Sunitha B. Thakur, Christopher J. Wiggins, Alexander P. Lin, Yan Li, RS: FPN CN 5, and MRI
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medicine.medical_specialty ,Radiological and Ultrasound Technology ,Computer science ,business.industry ,Biophysics ,medicine ,Radiology, Nuclear Medicine and imaging ,Medical physics ,business ,Health informatics - Published
- 2021
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4. P112 Removing Barriers to HIV Screening in a Community-based Pediatric Emergency Department
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B Sierzant, M Gaines, J Wiggins, W Hannah, and B Coleman
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Community based ,Pediatric emergency ,education.field_of_study ,medicine.medical_specialty ,business.industry ,Population ,Psychological intervention ,virus diseases ,HIV screening ,Emergency department ,Family medicine ,Medicine ,Nurse education ,Medical diagnosis ,business ,education - Abstract
Background Memorial University Medical Center conducts opt-out HIV screening in the Emergency Department (ED) for patients aged ≥ 13. After gaining consent, an electronic algorithm automatically orders an HIV test with the diagnostic evaluation for patients who meet CDC guidelines for HIV screening. Unfortunately, no pediatric patient aged 13–18 received HIV screening despite our out-opt testing protocol being in place since 2016. Approach Through a systematic analysis, implicit bias to gain consent was repeatedly identified as the most common barrier to HIV screening in this population. Pediatric leadership developed strategies to improve HIV screening, including education of parents and staff, on-site support for staff and parents/guardians, pediatric patient counseling, and adding HIV screening to syphilis tests. Despite these interventions, HIV screening in the pediatric population only improved about 37% from January 2017 through November 2020. As a final strategy HIV screening was added to the sexually transmitted infection (STI) order set for patients who met CDC guidelines for STI. Pediatric ED HIV education to clinical staff continued, specifically emphasizing the high prevalence of HIV in our community. Outcomes Persistence to drive change increased HIV screening by 61% from July 2020 to December 2020. Strategies producing the greatest impact were the inclusion of HIV testing in the standard STI panel and focused pediatric ED nurse education/support. As a result, current HIV screening in our pediatric patients aged 13–18 is now 88% of those who meet CDC guidelines to be screened. Significance Up to 20% of HIV diagnoses occur during adolescence making screening in this age group imperative. Removing implicit bias from HIV screening is difficult. However, continued persistence and automated testing protocols can lead to increases in pediatric ED HIV screening. Because of our high HIV screening rate, many pediatric patients will have early identification of HIV and linkage to care.
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- 2021
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5. Spontaneous Mediastinal Abscess and Sternal Cleft in the Medically Complex Neonate
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Laura A. Monson, Claire J. Wiggins, and Robert F. Dempsey
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Sternum ,medicine.medical_specialty ,Trisomy ,Chest wall reconstruction ,03 medical and health sciences ,Mediastinal infection ,0302 clinical medicine ,medicine ,Humans ,030223 otorhinolaryngology ,business.industry ,Infant, Newborn ,Postoperative complication ,030206 dentistry ,General Medicine ,Cardiopulmonary function ,Plastic Surgery Procedures ,medicine.disease ,Abscess ,Musculoskeletal Abnormalities ,Surgery ,Mediastinal abscess ,Mediastinitis ,Otorhinolaryngology ,Concomitant ,Female ,business ,Sternal cleft - Abstract
Sternal cleft (SC) is a rare congenital anomaly, occurring with associated developmental anomalies or in isolation. Surgery to reconstruct the sternum is indicated to protect the visceral organs from trauma, to ensure healthy cardiopulmonary function and growth, and to reconstruct the anterior chest wall. Although infection recognized as a postoperative complication following chest wall reconstruction, spontaneous mediastinal infection is rare. To the authors' knowledge, there is only 1 reported case of spontaneous mediastinal infection with concomitant SC in the literature. Here, the authors present a unique case of a medically complicated infant with a SC who presented with a spontaneous mediastinal abscess.
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- 2019
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6. Characterizing geometrical accuracy in clinically optimised 7T and 3T magnetic resonance images for high-precision radiation treatment of brain tumours
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Fiere Janssen, Jurgen Peerlings, Felix M. Mottaghy, Christopher J. Wiggins, Aswin L. Hoffmann, Philippe Lambin, Inge Compter, Alida A. Postma, RS: GROW - R3 - Innovative Cancer Diagnostics & Therapy, Radiotherapie, RS: FPN CN 5, MRI, RS: MHeNs - R1 - Cognitive Neuropsychiatry and Clinical Neuroscience, Beeldvorming, MUMC+: DA BV AIOS Nucleaire Geneeskunde (9), MUMC+: DA BV AIOS Radiologie (9), MUMC+: DA BV Medisch Specialisten Radiologie (9), RS: Carim - B06 Imaging, RS: NUTRIM - R1 - Obesity, diabetes and cardiovascular health, and Precision Medicine
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lcsh:Medical physics. Medical radiology. Nuclear medicine ,Materials science ,Ultra-high field MRI ,DISTORTION CORRECTION ,medicine.medical_treatment ,lcsh:R895-920 ,Radiation ,SUSCEPTIBILITY ,lcsh:RC254-282 ,THERAPY ,Geometric distortion ,Imaging phantom ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,Neuro-oncology ,medicine ,Radiology, Nuclear Medicine and imaging ,Original Research Article ,Clinical imaging ,Radiation treatment planning ,TESLA ,Dose delivery ,medicine.diagnostic_test ,business.industry ,Magnetic resonance imaging ,lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,Radiation therapy ,Anthropomorphic phantom ,030220 oncology & carcinogenesis ,Geometrical distortion ,Diametric spherical volume ,GLIOMA ,Nuclear medicine ,business ,MRI ,RADIOTHERAPY - Abstract
Background and purpose: In neuro-oncology, high spatial accuracy is needed for clinically acceptable high-precision radiation treatment planning (RTP). In this study, the clinical applicability of anatomically optimised 7-Tesla (7T) MR images for reliable RTP is assessed with respect to standard clinical imaging modalities. Materials and methods: System- and phantom-related geometrical distortion (GD) were quantified on clinically-relevant MR sequences at 7T and 3T, and on CT images using a dedicated anthropomorphic head phantom incorporating a 3D grid-structure, creating 436 points-of-interest. Global GD was assessed by mean absolute deviation (MADGlobal). Local GD relative to the magnetic isocentre was assessed by MADLocal. Using 3D displacement vectors of individual points-of-interest, GD maps were created. For clinically acceptable radiotherapy, 7T images need to meet the criteria for accurate dose delivery (GD
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- 2019
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7. Current Perceptions of Diversity Among Head Team Physicians and Head Athletic Trainers: Results Across US Professional Sports Leagues
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Nirav K. Pandya, Brian T. Feeley, Agustin Diaz, Kristofer J. Jones, Anthony J. Wiggins, and Obiajulu Agha
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medicine.medical_specialty ,business.industry ,media_common.quotation_subject ,Clinical Sciences ,Ethnic group ,Human Movement and Sports Sciences ,League ,Affect (psychology) ,Article ,diversity ,Race (biology) ,Clinical Research ,Family medicine ,Perception ,professional sports ,Health care ,medicine ,sex ,Orthopedics and Sports Medicine ,Quality of care ,business ,human activities ,race ,Diversity (politics) ,media_common - Abstract
Background: Discrepancies in race, ethnicity, and sex among health care providers and their patients have been shown to affect the patient-provider relationship as well as the quality of care. Currently, minority and female representation among orthopaedic surgeons remains low. Given the large proportion of minority athletes and their degree of public visibility, professional sports serves as an important arena within which to analyze the diversity of health care providers. Purpose: To describe and evaluate the current level of diversity of head team physicians (HTPs) and head athletic trainers (ATCs), primarily in terms of race and sex, within men’s professional sports leagues in the United States. Study Design: Cross-sectional study. Methods: Five major US professional sports leagues were evaluated: National Basketball Association, National Football League, National Hockey League, Major League Soccer, and Major League Baseball. Publicly available data were collected to identify the HTPs and head ATCs for each team within these leagues. Two independent observers analyzed photographs and names of these individuals to determine his or her perceived race and sex, with disagreements being resolved by a third independent observer. Other physician data collected included graduate degree(s), specialty, and number of years in practice. Kappa coefficients (κ) were employed to evaluate interobserver reliability. Chi-square, Fisher exact, and t tests were used for statistical comparisons across leagues. Results: The κ values for perceived race were 0.85 for HTPs and 0.89 for head ATCs, representing near-perfect interobserver agreement. Minorities comprised 15.5% of HTPs and 20.7% of ATCs ( P = .24). Women comprised 3.9% of HTPs and 1.3% of head ATCs ( P = .017). The majority of HTPs were orthopaedic surgeons with medical doctorates. Female HTPs had significantly fewer years in practice compared with male HTPs (15.0 ± 4.9 vs 23.1 ± 9.6; P = .04). Conclusion: The lead physicians and athletic training providers for men’s professional sports teams demonstrated low rates of minority and female representation, denoting a highly visible area for discussing the role of increased diversity in health care.
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- 2021
8. Bioenergetic Inhibitors: Antibiotic Efficacy and Mechanisms of Action in Mycobacterium tuberculosis
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Michael Berney, Thomas J. Wiggins, and Erik J. Hasenoehrl
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0301 basic medicine ,Microbiology (medical) ,Drug ,Bioenergetics ,medicine.drug_class ,media_common.quotation_subject ,030106 microbiology ,Immunology ,Antibiotics ,Antitubercular Agents ,lcsh:QR1-502 ,Review ,Drug resistance ,Bioinformatics ,bioenergetics ,Microbiology ,Oxidative Phosphorylation ,lcsh:Microbiology ,Mycobacterium tuberculosis ,03 medical and health sciences ,chemistry.chemical_compound ,Cellular and Infection Microbiology ,bactericidal ,Humans ,Tuberculosis ,Medicine ,bedaquiline ,media_common ,biology ,Drug discovery ,business.industry ,electron transport chain ,persistence ,biology.organism_classification ,030104 developmental biology ,Infectious Diseases ,Action (philosophy) ,chemistry ,Q203 ,Bedaquiline ,Energy Metabolism ,business - Abstract
Development of novel anti-tuberculosis combination regimens that increase efficacy and reduce treatment timelines will improve patient compliance, limit side-effects, reduce costs, and enhance cure rates. Such advancements would significantly improve the global TB burden and reduce drug resistance acquisition. Bioenergetics has received considerable attention in recent years as a fertile area for anti-tuberculosis drug discovery. Targeting the electron transport chain (ETC) and oxidative phosphorylation machinery promises not only to kill growing cells but also metabolically dormant bacilli that are inherently more drug tolerant. Over the last two decades, a broad array of drugs targeting various ETC components have been developed. Here, we provide a focused review of the current state of art of bioenergetic inhibitors of Mtb with an in-depth analysis of the metabolic and bioenergetic disruptions caused by specific target inhibition as well as their synergistic and antagonistic interactions with other drugs. This foundation is then used to explore the reigning theories on the mechanisms of antibiotic-induced cell death and we discuss how bioenergetic inhibitors in particular fail to be adequately described by these models. These discussions lead us to develop a clear roadmap for new lines of investigation to better understand the mechanisms of action of these drugs with complex mechanisms as well as how to leverage that knowledge for the development of novel, rationally-designed combination therapies to cure TB.
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- 2021
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9. Reemerging Viral Infections: Implications of Lack of Vaccination
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Claire J. Wiggins, Radhika A. Shah, Sahira Farooq, Emily Limmer, and Ritu Swali
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medicine.medical_specialty ,business.industry ,viruses ,High mortality ,Outbreak ,medicine.disease ,Measles ,Rubella ,Vaccination ,Infectious disease (medical specialty) ,medicine ,Smallpox ,Western world ,Intensive care medicine ,business - Abstract
The development of vaccinations changed the face of medicine starting in the late 1700s with the introduction of the vaccine that led to the eradication of smallpox, by providing active and passive immunity against infectious diseases that had plagued many generations. The result by the beginning of the twenty-first century was the near eradication of these morbid illnesses in the western world, including measles, rubella, and varicella-zoster viruses. Recent developments in the anti-vaccination movement have led to widespread refusal of vaccinations, subsequently resurrecting many viruses that have not been battled for centuries. Outbreaks, seen throughout the world, have seen high mortality rates in immunocompetent and immunocompromised individuals, alike. Those who have survived the illnesses have suffered severe complications, especially since treatment for these viruses is limited. In this chapter, we review reemerging viral infections with primary and secondary cutaneous manifestations. We also discuss the factors spurring the anti-vaccination movement and the obstacles healthcare faces in abating its consequences.
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- 2021
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10. Atypical presentation and management of an epithelioid hemangioma: a case report and review of the literature
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Claire J. Wiggins, Rami P. Dibbs, Erica L. Bartlett, Daniel J. Ashton, and Renata S. Maricevich
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medicine.medical_specialty ,lcsh:Surgery ,Epithelioid hemangioma ,Hemangioma ,Lesion ,030207 dermatology & venereal diseases ,03 medical and health sciences ,0302 clinical medicine ,Dermis ,Biopsy ,medicine ,Epithelioid Hemangioma ,Intramuscular ,medicine.diagnostic_test ,business.industry ,lcsh:RJ1-570 ,lcsh:Pediatrics ,lcsh:RD1-811 ,medicine.disease ,eye diseases ,Vascular neoplasm ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Pediatrics, Perinatology and Child Health ,Surgery ,Radiology ,Presentation (obstetrics) ,medicine.symptom ,business ,Subcutaneous tissue ,Pediatric population - Abstract
Background Epithelioid hemangioma is a rare, benign vascular lesion classically presenting with painless nodules in the head and neck region. Hemangioma lesions are typically small, located within the dermis and subcutaneous tissue, and rarely exceed 10 cm in size. Complete surgical excision, with negative margins, is the recommended treatment as local recurrence is common. We describe an unusual presentation of epithelioid hemangioma that, to our knowledge, has not been previously described in the literature, epithelioid. Case presentation We report an atypical case of a large epithelioid hemangioma lesion with deep intramuscular involvement in a 16-year-old male. Ultrasound and MRI showed a hypervascular mass on the patient’s left upper back, and biopsy confirmed the diagnosis. Treatment consisted of preoperative embolization followed by excision and local tissue rearrangement. Conclusions Epithelioid hemangiomas are considered uncommon in the pediatric population. Moreover, it is challenging to diagnose these lesions due to their similarities to other vascular anomalies. We aim to increase awareness of this condition and obtain more precision in diagnosis, thus standardizing the approach for those treating individuals with vascular anomalies.
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- 2020
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11. Melanoma origins: data from early‐stage tumours supports de novo and naevus‐associated melanomas as distinct subtypes
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David Polsky and J Wiggins
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Skin Neoplasms ,Text mining ,business.industry ,Melanoma ,medicine ,Cancer research ,Humans ,Dermatology ,Stage (cooking) ,medicine.disease ,business - Published
- 2021
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12. Anti-CTLA-4 therapy-associated granuloma annulare in chronic myelomonocytic leukemia
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Susan Y. Chon and Claire J. Wiggins
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business.industry ,Immune checkpoint inhibitors ,medicine.medical_treatment ,Chronic myelomonocytic leukemia ,Cancer ,General Medicine ,Immunotherapy ,medicine.disease ,Immune system ,Case Studies ,Cancer cell ,Immunology ,medicine ,business ,Adverse drug reaction ,Granuloma annulare - Abstract
Immune checkpoint inhibitor (ICI) therapies activate the immune system to unmask cancer cells that the body might otherwise not detect. These cancer therapies alter the immune system at different "checkpoint" proteins such as PD-1, PD-L1, or CTLA-4 to better target tumor cells, but also have the potential to affect normal tissues. In patients receiving ICI therapy, cutaneous reactions have been frequently documented, ranging from mild urticarial rashes to widespread cutaneous necrosis. Proper identification and management of ICI therapy side effects is essential to the care of these patients. Here, we present an unusual granulomatous cutaneous reaction in a patient receiving anti-CTLA-4 therapy for chronic myelomonocytic leukemia.
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- 2020
13. Dermatomyositis, pembrolizumab, and squamous cell carcinoma of the lung
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Susan Y. Chon and Claire J. Wiggins
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Squamous-cell carcinoma of the lung ,business.industry ,medicine.medical_treatment ,Cancer ,General Medicine ,Immunotherapy ,Pembrolizumab ,Dermatomyositis ,medicine.disease ,Immune system ,Case Studies ,Cancer immunotherapy ,Cancer cell ,Cancer research ,Medicine ,business - Abstract
Cancer immunotherapy has impacted the treatment of numerous tumor types, including skin, lung, and colon cancers. Immune checkpoint inhibitors (ICI) activate the immune system to attack cancer cells, but this mechanism can also impact healthy cells. Dermatomyositis, an autoimmune syndrome affecting multiple organ systems, is often associated with cancer as a paraneoplastic syndrome, but this syndrome can also be induced by ICI. Here, we describe a case of dermatomyositis in a patient receiving pembrolizumab for treatment of squamous cell carcinoma of the lung and discuss the importance of recognizing complications of ICI.
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- 2020
14. Vancomycin-induced linear IgA bullous dermatosis
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Claire J. Wiggins and Susan Y. Chon
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Polypharmacy ,medicine.medical_specialty ,Linear IgA bullous dermatosis ,Side effect ,business.industry ,General Medicine ,Inpatient setting ,Disease ,medicine.disease ,Dermatology ,Case Studies ,medicine ,Proper treatment ,Vancomycin ,business ,medicine.drug - Abstract
Adverse medication side effects are not uncommon in the inpatient setting, where polypharmacy is the norm. Linear IgA bullous dermatosis (LABD) can be a cutaneous side effect of commonly used inpatient medications, such as vancomycin. Symptoms of LABD can be severe, and proper recognition of this drug-induced disease is important to ensuring proper treatment, including the removal of the inciting agent. This report describes a case of vancomycin-associated LABD in a 66-year-old man and the proper management of drug-induced LABD.
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- 2020
15. Cutaneous Effects of Notch Inhibitor Therapy: A Report of Two Cases
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Claire J. Wiggins and Susan Y. Chon
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business.industry ,Notch signaling pathway ,Case Report ,Dermatology ,Atopic dermatitis ,Disease ,medicine.disease ,030207 dermatology & venereal diseases ,03 medical and health sciences ,0302 clinical medicine ,Apoptosis ,RL1-803 ,030220 oncology & carcinogenesis ,Psoriasis ,Carcinoma ,medicine ,Cancer research ,Cyst ,Hidradenitis suppurativa ,business - Abstract
As aberrant Notch signaling has been linked to cancerous growth, Notch inhibitors represent a novel category of targeted oncological therapy. Notch pathways in tumor cells may contribute to proliferation or limit apoptosis and differentiation. Healthy skin differentiation and homeostasis are reliant on normal Notch expression, and disruption of this signaling has been implicated in dermatological conditions such as hidradenitis suppurativa, psoriasis, atopic dermatitis, and lichen planus. Here, we describe two cases of patients with cutaneous side effects from Notch inhibitor treatment for adenoid cyst carcinoma (ACC) and review the role of Notch signaling in skin disease. By illuminating connections between medication side effects and disease pathogenesis, our goal is to increase awareness of the cutaneous side effects of Notch inhibitor treatment.
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- 2020
16. The Influence of Perioperative Nerve Block on Strength and Functional Return to Sports After Anterior Cruciate Ligament Reconstruction
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Marvin K Smith, Mark D. Miller, David R. Diduch, F. Winston Gwathmey, Stephen F. Brockmeier, Joseph M. Hart, Stephan G. Bodkin, Michelle E. Kew, Anthony J. Wiggins, and Brian C. Werner
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Adult ,Male ,Weakness ,medicine.medical_specialty ,Anterior cruciate ligament reconstruction ,medicine.medical_treatment ,Poison control ,Physical Therapy, Sports Therapy and Rehabilitation ,Hamstring Muscles ,Return to sport ,Quadriceps Muscle ,Cohort Studies ,03 medical and health sciences ,Young Adult ,0302 clinical medicine ,medicine ,Humans ,Orthopedics and Sports Medicine ,Muscle Strength ,Physical Therapy Modalities ,030222 orthopedics ,Rehabilitation ,Muscle Weakness ,Anterior Cruciate Ligament Reconstruction ,business.industry ,Anterior Cruciate Ligament Injuries ,Nerve Block ,030229 sport sciences ,Perioperative ,musculoskeletal system ,Sciatic Nerve ,Surgery ,Return to Sport ,Torque ,Athletic Injuries ,Nerve block ,Female ,medicine.symptom ,business ,Hamstring ,Femoral Nerve - Abstract
Background: Patients often have quadriceps or hamstring weakness after anterior cruciate ligament reconstruction (ACLR), despite postoperative physical therapy regimens; however, little evidence exists connecting nerve blocks and ACLR outcomes. Purpose: To compare muscle strength at return to play in patients who received a nerve block with ACLR and determine whether a specific block type affected subjective knee function. Study Design: Cohort study; Level of evidence, 3. Methods: Patients were recruited 5 to 7 months after primary, isolated ACLR and completed bilateral isokinetic strength tests of the knee extensor/flexor groups as a single-session return-to-sport test. Subjective outcomes were assessed with the International Knee Documentation Committee (IKDC) score. Strength was expressed as torque normalized to mass (N·m/kg) and limb symmetry index as involved/uninvolved torque. Chart review was used to determine the type of nerve block and graft used. Nerve block types were classified as knee extensor motor (femoral nerve), knee flexor motor (sciatic nerve), or isolated sensory (adductor canal block/saphenous nerve). A 1-way analysis of covariance controlling for graft type was used. Results: A total of 169 patients were included. Graft type distribution consisted of 102 (60.4%) ipsilateral bone–patellar tendon–bone (BTB) and 67 (39.6%) ipsilateral hamstring tendon. Nerve block type distribution consisted of 38 (22.5%) femoral, 25 (14.8%) saphenous, 45 (26.6%) femoral and sciatic, and 61 (36.1%) saphenous and sciatic. No significant difference was found in knee extensor strength ( P = .113) or symmetry ( P = .860) between patients with knee extensor motor blocks (1.57 ± 0.45 N·m/kg; 70.1% ± 15.3%) and those without (1.47 ± 0.47 N·m/kg; 69.6% ± 18.8%). A significant difference was found between patients with knee flexor motor blocks (0.83 ± 0.26 N·m/kg) and those without (0.92 ± 0.27 N·m/kg) for normalized knee flexor strength ( P = .21) but not knee flexor symmetry ( P = .592). Controlling for graft type, there were no differences in subjective knee function (IKDC score) between all nerve block groups ( P = .57). Conclusion: Our data showed that use of a sciatic nerve block with ACLR in patients with hamstring and BTB grafts influences persistent knee flexor strength deficits at time of return to sports. Although the cause of postoperative muscular weakness is multifactorial, this study adds to the growing body of evidence suggesting that perioperative nerve blocks affect muscle strength and functional rehabilitation after ACLR.
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- 2020
17. Ultra-high field spinal cord MRI in multiple sclerosis: Where are we standing? A literature review
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Job van den Hurk, Raymond Hupperts, Christopher J. Wiggins, Daniël J. Kreiter, and Oliver Gerlach
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medicine.medical_specialty ,Multiple Sclerosis ,7T ,DIAGNOSIS ,3T ,Ultra high field ,GRADIENT ,medicine ,Humans ,ultra-high field ,Gray Matter ,Retrospective Studies ,LESIONS ,business.industry ,Multiple sclerosis ,General Medicine ,medicine.disease ,Spinal cord ,Magnetic Resonance Imaging ,SIGNAL ,medicine.anatomical_structure ,Spinal Cord ,Neurology ,1.5 T ,CLINICALLY ISOLATED SYNDROMES ,Neurology (clinical) ,Radiology ,business - Abstract
Magnetic resonance imaging (MRI) is a cornerstone in multiple sclerosis (MS) diagnostics and monitoring. Ultra-high field (UHF) MRI is being increasingly used and becoming more accessible. Due to the small diameter and mobility of the spinal cord, imaging this structure at ultra-high fields poses additional challenges compared to brain imaging. Here we review the potential benefits for the MS field by providing a literature overview of the use UHF spinal cord MRI in MS research and we elaborate on the challenges that are faced. Benefits include increased signal- and contrast-to-noise, enabling for higher spatial resolutions, which can improve MS lesion sensitivity in both the spinal white matter as well as grey matter. Additionally, these benefits can aid imaging of microstructural abnormalities in the spinal cord in MS using advanced MRI techniques like functional imaging, MR spectroscopy and diffusion-based techniques. Technical challenges include increased magnetic field inhomogeneities, distortions from physiological motion and optimalisation of sequences. Approaches including parallel imaging techniques, real time shimming and retrospective compensation of physiological motion are making it increasingly possible to unravel the potential of spinal cord UHF MRI in the context of MS research.
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- 2022
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18. Disease Burden of Medial Epicondylitis in the USA Is Increasing: An Analysis of 19,856 Patients From 2007 to 2014
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Ryan M. Degen, David W. Altchek, Anthony J. Wiggins, Christopher L. Camp, Brian C. Werner, Jourdan M. Cancienne, and Joshua S. Dines
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030222 orthopedics ,medicine.medical_specialty ,education.field_of_study ,Pediatrics ,Sports medicine ,business.industry ,Epicondylitis ,Incidence (epidemiology) ,Population ,030229 sport sciences ,medicine.disease ,03 medical and health sciences ,0302 clinical medicine ,Epidemiology ,Orthopedic surgery ,medicine ,Original Article ,Orthopedics and Sports Medicine ,Surgery ,business ,education ,Disease burden ,Reimbursement - Abstract
BACKGROUND: Medial epicondylitis (ME), or “golfer’s elbow,” is often treated initially by conservative means. Up to 15% of recalcitrant cases require surgical intervention, according to small sample populations, but no national study has determined the incidence of the diagnosis or corroborated the rate of surgical intervention. PURPOSE/QUESTION: We sought to review the annual incidence of ME, surgical rates, and health care costs in a population setting. METHODS: A national database was queried for ME from 2007 to 2014. Annual rates and the percentage of diagnosed cases subjected to surgical intervention were recorded. Epidemiologic data was reported with descriptive statistics, and the significant trends over time were analyzed using linear regression. RESULTS: We identified 19,856 cases of ME in the study period. There was a significant increase in the annual incidence and overall incidence per 10,000 patients. The proportion of diagnoses in patients under 65 years of age decreased significantly, while the proportion in those 65 years of age or older significantly increased. The annual number of surgical interventions significantly increased over the study period, although the annual proportion of diagnosed cases proceeding to surgery remained constant. The proportion of patients 65 years of age or older undergoing surgery significantly increased. Total reimbursement for the management of ME during the study period was $1,877,189. While there was a significant increase in the total annual reimbursement, annual per-patient reimbursement did not change significantly. CONCLUSIONS: While the annual incidence of ME and surgical treatment of ME increased significantly from 2007 to 2014, the proportion of cases treated surgically did not. Notably, the proportion of patients 65 years of age or older diagnosed with and being surgically treated for ME has increased in recent years. Total reimbursement for ME has steadily risen, although per-patient reimbursement rates have not significantly changed.
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- 2018
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19. 322 Novel Quality Assessment Methodology in Focused Cardiac Ultrasound
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J. Wiggins, J.R. Balderston, A. Weltler, Lindsay Taylor, J. Wayman, and D.P. Evans
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medicine.medical_specialty ,Quality assessment ,business.industry ,Emergency Medicine ,medicine ,Medical physics ,Focused cardiac ultrasound ,business - Published
- 2021
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20. Industrialized Higher Education and its Sustainable Alternatives
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Joshua W. Clegg, Bradford J. Wiggins, and Joseph A. Ostenson
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Economic growth ,Higher education ,Standardization ,business.industry ,media_common.quotation_subject ,Mission creep ,Education ,Industrialisation ,Austerity ,Sustainability ,Sociology ,business ,Autonomy ,media_common ,Isomorphism (sociology) - Abstract
We argue that academic life is increasingly giving way to forces of industrialization and that many of the problems confronting higher education arise within this transformation. We discuss how a culture of standardization has led to academic monocultures; how faculty autonomy has been subverted by topdown management structures; how locally based academic communities have been dispersed by mission creep and institutional isomorphism; and how many institutions have grown unsustainably, even in the midst of austerity. Drawing inspiration from sustainability discourses, we propose that the individuals and communities that make up higher education seek out and nourish practices that permit organic (local, slow) institutional development and relationally structured cultures of care and responsibility.
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- 2017
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21. A Diffuse Papular Rash in an Adult
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Stephen K. Tyring, Claire J. Wiggins, and Ritu Swali
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Adult ,medicine.medical_specialty ,business.industry ,Papular rash ,Anti-Inflammatory Agents ,MEDLINE ,General Medicine ,Dermatology ,Hydroxyzine ,Desoximetasone ,Humans ,Medicine ,Female ,business ,Mastocytosis - Published
- 2020
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22. Hyperkeratosis of the left cheek
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Ritu Swali, Claire J. Wiggins, and Stephen K. Tyring
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Trigeminal nerve ,medicine.medical_specialty ,integumentary system ,medicine.diagnostic_test ,business.industry ,Hyperkeratosis ,Left cheek ,General Medicine ,medicine.disease ,Dermatology ,Case Studies ,medicine ,Hyperkeratotic plaques ,business ,Shave biopsy - Abstract
A 66-year-old man with a recent history of herpes zoster in the second division of the trigeminal nerve presented with hyperkeratotic plaques along his left cheek and temple. A shave biopsy was found to be consistent with postherpetic hyperkeratosis. This case represents a unique presentation of Wolf’s postherpetic isotopic response: a new skin disorder emerging at the site of a previously healed herpetic, predominantly zoster, infection. We aim to increase awareness of an unusual complication of herpes zoster and the importance of appropriate vaccination to help protect patients from these potential postinfection effects.
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- 2020
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23. Estimating and eliminating the excitation errors in bipolar gradient composite excitations caused by radiofrequency-gradient delay: Example of bipolar spokes pulses in parallel transmission
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Christopher J. Wiggins, Desmond H. Y. Tse, and Benedikt A. Poser
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Physics ,Field (physics) ,business.industry ,Simultaneous multislice ,Composite number ,Phase (waves) ,Measure (mathematics) ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,Optics ,Nuclear magnetic resonance ,Parallel communication ,Excited state ,Radiology, Nuclear Medicine and imaging ,business ,030217 neurology & neurosurgery ,Excitation - Abstract
Purpose To eliminate a slice-position–dependent excitation error commonly observed in bipolar-gradient composite excitations such as spokes pulses in parallel transmission. Theory and Methods An undesired timing delay between subpulses in the composite pulse and their bipolar slice-selective gradient is hypothesized to cause the error. A mathematical model is presented here to relate this mismatch to an induced slice-position–dependent phase difference between the subpulses. A new navigator method is proposed to measure the timing mismatch and eliminate the error. This is demonstrated at 7 Tesla with flip-angle maps measured by a presaturation turbo-flash sequence and in vivo images acquired by a simultaneous multislice/echo-planar imaging (SMS-EPI) sequence. Results Error-free flip-angle maps were obtained in two ways: 1) by correcting the time delay directly and 2) by applying the corresponding slice-position–dependent phase differences to the subpulses. This confirms the validity of the mathematical description. The radiofrequency (RF)-gradient delay measured by the navigator method was of 6.3 μs, which agreed well with the estimate from flip-angle maps at different delay times. By applying the timing correction, accurately excited EPI images were acquired with bipolar dual-spokes SMS-2 excitations. Conclusion An effective correction is proposed to mitigate slice-position–dependent errors in bipolar composite excitations caused by undesired RF-gradient timing delays. Magn Reson Med, 2016. © 2016 International Society for Magnetic Resonance in Medicine.
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- 2016
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24. Universal Pulses for MRI at 9.4 Tesla - a Feasibility Study
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Vincent Gras, Benedikt A. Poser, Nicolas Boulant, Franck Mauconduit, Christopher J. Wiggins, RS: FPN CN 5, and MRI
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Physics ,parallel transmission ,Basis (linear algebra) ,medicine.diagnostic_test ,business.industry ,Magnetic resonance imaging ,030218 nuclear medicine & medical imaging ,Magnetic field ,03 medical and health sciences ,homogeneity ,0302 clinical medicine ,Optics ,Transmission (telecommunications) ,Parallel communication ,Radiofrequency field ,medicine ,ARRAY ,RF ,Waveform ,Radio frequency ,business ,mri ,030217 neurology & neurosurgery - Abstract
Magnetic Resonance Imaging (MRI) at higher magnetic fields (above 7 Tesla) suffers from radiofrequency field inhomogeneities that result in non-uniform transmission fields. The use of parallel transmission – transmitting on several antennas simultaneously, but with different waveforms – can address this problem, but usually at a considerable cost due to the need to calibrate the RF pulses used on a per-subject basis. A recently developed concept – Universal Pulses, which have been calculated across a set of subjects – has been shown to produce uniform images with minimal setup times at 7 Tesla. Here we perform a feasibility study to see if the same approach is likely to bring benefits at 9.4 Tesla.
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- 2019
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25. Syndromic Multisuture Craniosynostosis With Associated Anterior Segment Dysgenesis, Optic Nerve Hypoplasia, and Congenital Glaucoma
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Veeral Shah, Kelly P. Schultz, Claire J. Wiggins, Haley Streff, and Edward P. Buchanan
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medicine.medical_specialty ,Congenital glaucoma ,genetic structures ,Glaucoma ,Craniosynostosis ,03 medical and health sciences ,Dysgenesis ,Craniosynostoses ,0302 clinical medicine ,Ophthalmology ,medicine ,Humans ,Optic Nerve Hypoplasia ,Eye Abnormalities ,030223 otorhinolaryngology ,Papilledema ,Optic nerve hypoplasia ,Corneal Decompensation ,business.industry ,030206 dentistry ,medicine.disease ,eye diseases ,Buphthalmos ,Otorhinolaryngology ,sense organs ,Oral Surgery ,medicine.symptom ,business - Abstract
Patients with craniosynostosis with subnormal vision due to papilledema and/or exposure-related corneal decompensation are well documented in the literature; however, there is only a single prior documented case of vision compromise secondary to anterior segment dysgenesis and glaucoma in this patient population. This report highlights a case of syndromic craniosynostosis with advanced corneal decompensation and anterior segment dysgenesis that was masked and ultimately delayed the diagnosis of congenital glaucoma.
- Published
- 2018
26. High-resolution gradient-recalled echo imaging at 9.4T using 16-channel parallel transmit simultaneous multislice spokes excitations with slice-by-slice flip angle homogenization
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Benedikt A. Poser, Christopher J. Wiggins, and Desmond H. Y. Tse
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Physics ,Sinc function ,business.industry ,Homogenization (chemistry) ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,Optics ,Nuclear magnetic resonance ,Flip angle ,Parallel communication ,Waveform ,Radiology, Nuclear Medicine and imaging ,Wafer ,business ,Scaling ,030217 neurology & neurosurgery ,Excitation - Abstract
PURPOSE: In order to fully benefit from the improved signal-to-noise and contrast-to-noise ratios at 9.4T, the challenges of B1+ inhomogeneity and the long acquisition time of high-resolution 2D gradient-recalled echo (GRE) imaging were addressed. THEORY AND METHODS: Flip angle homogenized excitations were achieved by parallel transmission (pTx) of 3-spoke pulses, designed by magnitude least-squares optimization in a slice-by-slice fashion; the acquisition time reduction was achieved by simultaneous multislice (SMS) pulses. The slice-specific spokes complex radiofrequency scaling factors were applied to sinc waveforms on a per-channel basis and combined with the other pulses in an SMS slice group to form the final SMS-pTX pulse. Optimal spokes locations were derived from simulations. RESULTS: Flip angle maps from presaturation TurboFLASH showed improvement of flip angle homogenization with 3-spoke pulses over CP-mode excitation (normalized root-mean-square error [NRMSE] 0.357) as well as comparable excitation homogeneity across the single-band (NRMSE 0.119), SMS-2 (NRMSE 0.137), and SMS-3 (NRMSE 0.132) 3-spoke pulses. The application of the 3-spoke SMS-3 pulses in a 48-slice GRE protocol, which has an in-plane resolution of 0.28 × 0.28 mm, resulted in a 50% reduction of scan duration (total acquisition time 6:52 min including reference scans). CONCLUSION: Time-efficient flip angle homogenized high-resolution GRE imaging at 9.4T was accomplished by using slice-specific SMS-pTx spokes excitations. Magn Reson Med, 2016. © 2016 The Authors Magnetic Resonance in Medicine published by Wiley Periodicals, Inc. on behalf of International Society for Magnetic Resonance in Medicine. This is an open access article under the terms of the Creative Commons Attribution NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
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- 2016
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27. Technical feasibility of integrating 7 T anatomical MRI in image-guided radiotherapy of glioblastoma: a preparatory study
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Christopher J. Wiggins, Jurgen Peerlings, Pieter L. Kubben, Alida A. Postma, Pieter Wesseling, Aswin L. Hoffmann, Philippe Lambin, Linda Ackermans, Dimo Ivanov, Inge Compter, Olaf E. M. G. Schijns, Daniëlle B.P. Eekers, Benno Küsters, Pathology, CCA - Imaging, Promovendi ODB, Radiotherapie, RS: GROW - R3 - Innovative Cancer Diagnostics & Therapy, Beeldvorming, MUMC+: DA BV Medisch Specialisten Radiologie (9), MRI, RS: FPN CN 5, and MUMC+: MA Med Staf Spec Neurochirurgie (9)
- Subjects
Male ,Ultra-high field MRI ,Image quality ,Pilot Projects ,030218 nuclear medicine & medical imaging ,0302 clinical medicine ,STRENGTH ,Image Processing, Computer-Assisted ,INVERSION ,Radiation treatment planning ,TESLA ,Anthropometry ,Radiological and Ultrasound Technology ,medicine.diagnostic_test ,Brain Neoplasms ,Phantoms, Imaging ,Disorders of movement Donders Center for Medical Neuroscience [Radboudumc 3] ,GLIOMAS ,Magnetic Resonance Imaging ,Healthy Volunteers ,Radiology Nuclear Medicine and imaging ,Geometrical distortion ,Female ,Artifacts ,Treatment planning ,Adult ,MICROVASCULARITY ,Scanner ,CONTRAST ,Biophysics ,Rare cancers Radboud Institute for Molecular Life Sciences [Radboudumc 9] ,Imaging phantom ,03 medical and health sciences ,Imaging, Three-Dimensional ,Neuroimaging ,Journal Article ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,GEOMETRIC DISTORTION ,Models, Statistical ,Radiotherapy ,business.industry ,Radiotherapy Planning, Computer-Assisted ,Reproducibility of Results ,Magnetic resonance imaging ,medicine.disease ,ULTRAHIGH-FIELD ,Visualization ,Magnetic Fields ,VISUALIZATION ,NEUROSURGERY ,Glioblastoma ,Nuclear medicine ,business ,030217 neurology & neurosurgery ,Radiotherapy, Image-Guided - Abstract
Item does not contain fulltext OBJECTIVES: The use of 7 Tesla (T) magnetic resonance imaging (MRI) has recently shown great potential for high-resolution soft-tissue neuroimaging and visualization of microvascularization in glioblastoma (GBM). We have designed a clinical trial to explore the value of 7 T MRI in radiation treatment of GBM. For this aim we performed a preparatory study to investigate the technical feasibility of incorporating 7 T MR images into the neurosurgical navigation and radiotherapy treatment planning (RTP) systems via qualitative and quantitative assessment of the image quality. MATERIALS AND METHODS: The MR images were acquired with a Siemens Magnetom 7 T whole-body scanner and a Nova Medical 32-channel head coil. The 7 T MRI pulse sequences included magnetization-prepared two rapid acquisition gradient echoes (MP2RAGE), T2-SPACE, SPACE-FLAIR and gradient echo sequences (GRE). A pilot study with three healthy volunteers and an anthropomorphic 3D phantom was used to assess image quality and geometrical image accuracy. RESULTS: The MRI scans were well tolerated by the volunteers. Susceptibility artefacts were observed in both the cortex and subcortical white matter at close proximity to air-tissue interfaces. Regional loss of signal and contrast could be minimized by the use of dielectric pads. Image transfer and processing did not degrade image quality. The system-related spatial uncertainty of geometrical distortion-corrected MP2RAGE pulse sequences was
- Published
- 2016
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28. The traveling heads: multicenter brain imaging at 7 Tesla
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Oliver Speck, Christopher J. Wiggins, Maximilian N. Voelker, Moritz C. Berger, Thoralf Niendorf, Tony Stöcker, Robert Trampel, David G. Norris, Astrid Wollrab, Wolfgang Bogner, Mark E. Ladd, Oliver Weinberger, Harald H. Quick, Daniel Brenner, Oliver Kraff, Simon Robinson, MRI, RS: FPN CN 5, Magnetic Detection and Imaging, and Faculty of Science and Technology
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Male ,Ultrahigh field ,Medizin ,SEGMENTATION ,ROBUST ,Signal-To-Noise Ratio ,Brain mapping ,030218 nuclear medicine & medical imaging ,methods [Brain Mapping] ,methods [Magnetic Resonance Imaging] ,0302 clinical medicine ,Nuclear magnetic resonance ,REPRODUCIBILITY ,Multi-center ,Brain Mapping ,Radiological and Ultrasound Technology ,medicine.diagnostic_test ,DEMENTIA ,Brain ,instrumentation [Magnetic Resonance Imaging] ,Communication noise ,IR-101136 ,Algorithms ,METIS-317779 ,Adult ,Materials science ,IMAGES ,Biophysics ,Neuroimaging ,methods [Image Interpretation, Computer-Assisted] ,T MRI DATA ,150 000 MR Techniques in Brain Function ,03 medical and health sciences ,Magnetic resonance imaging ,Image Interpretation, Computer-Assisted ,medicine ,Humans ,ddc:530 ,Radiology, Nuclear Medicine and imaging ,FIELD ,OPTIMIZATION ,diagnostic imaging [Brain] ,Reproducibility ,business.industry ,Reproducibility of Results ,Image enhancement ,Image Enhancement ,PHYSIOLOGICAL NOISE ,MORPHOMETRY ,methods [Image Enhancement] ,Nuclear medicine ,business ,030217 neurology & neurosurgery - Abstract
OBJECTIVE: This study evaluates the inter-site and intra-site reproducibility of 7 Tesla brain imaging and compares it to literature values for other field strengths.MATERIALS AND METHODS: The same two subjects were imaged at eight different 7 T sites. MP2RAGE, TSE, TOF, SWI, EPI as well as B1 and B0 field maps were analyzed quantitatively to assess inter-site reproducibility. Intra-site reproducibility was measured with rescans at three sites.RESULTS: Quantitative measures of MP2RAGE scans showed high agreement. Inter-site and intra-site reproducibility errors were comparable to 1.5 and 3 T. Other sequences also showed high reproducibility between the sites, but differences were also revealed. The different RF coils used were the main source for systematic differences between the sites.CONCLUSION: Our results show for the first time that multi-center brain imaging studies of the supratentorial brain can be performed at 7 T with high reproducibility and similar reliability as at 3T. This study develops the basis for future large-scale 7 T multi-site studies.
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- 2016
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29. 856P Uptake of risk-reducing bilateral salpingo-oophorectomy (RRBSO) in BRCA1/BRCA2 carriers
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T. Foo, X. Manzanares, A. George, and J. Wiggins
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medicine.medical_specialty ,Oncology ,business.industry ,medicine ,Hematology ,business ,Brca1 brca2 ,Bilateral salpingo-oophorectomy ,Surgery - Published
- 2020
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30. Biocompatible dialysis fluids for peritoneal dialysis
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Kathryn J. Wiggins, Yeoungjee Cho, Jonathan C. Craig, Sunil V. Badve, Giovanni F.M. Strippoli, and David W. Johnson
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Medicine General & Introductory Medical Sciences ,Adult ,medicine.medical_specialty ,medicine.medical_treatment ,030232 urology & nephrology ,Urology ,Renal function ,030204 cardiovascular system & hematology ,Urine ,Kidney ,Icodextrin ,Peritoneal dialysis ,law.invention ,03 medical and health sciences ,0302 clinical medicine ,Randomized controlled trial ,law ,Dialysis Solutions ,medicine ,Humans ,Pharmacology (medical) ,Adverse effect ,Child ,Randomized Controlled Trials as Topic ,business.industry ,Hydrogen-Ion Concentration ,Confidence interval ,Surgery ,Solutions ,Bicarbonates ,Pharmaceutical Solutions ,Glucose ,Relative risk ,Meta-analysis ,Peritoneum ,business ,Peritoneal Dialysis - Abstract
BACKGROUND: Biocompatible peritoneal dialysis (PD) solutions, including neutral pH, low glucose degradation product (GDP) solutions and icodextrin, have previously been shown to favourably influence some patient‐level outcomes, albeit based on generally sub‐optimal quality studies. Several additional randomised controlled trials (RCT) evaluating biocompatible solutions in PD patients have been published recently. This is an update of a review first published in 2014. OBJECTIVES: This review aimed to look at the benefits and harms of biocompatible PD solutions in comparison to standard PD solutions in patients receiving PD. SEARCH METHODS: The Cochrane Kidney and Transplant Specialised Register was searched up to 12 February 2018 through contact with the Information Specialist using search terms relevant to this review. Studies in the Specialised Register are identified through searches of CENTRAL, MEDLINE, and EMBASE, conference proceedings, the International Clinical Trials Register Search Portal and ClinicalTrials.gov. SELECTION CRITERIA: All RCTs and quasi‐RCTs in adults and children comparing the effects of biocompatible PD solutions (neutral pH, lactate‐buffered, low GDP; neutral pH, bicarbonate(± lactate)‐buffered, low GDP; glucose polymer (icodextrin)) in PD were included. Studies of amino acid‐based solutions were excluded. DATA COLLECTION AND ANALYSIS: Two authors extracted data on study quality and outcomes. Summary effect estimates were obtained using a random‐effects model, and results were expressed as risk ratios and 95% confidence intervals (CI) for categorical variables, and mean differences (MD) or standardised mean differences (SMD) and 95% CI for continuous variables. MAIN RESULTS: This review update included 42 eligible studies (3262 participants), including six new studies (543 participants). Overall, 29 studies (1971 participants) compared neutral pH, low GDP PD solution with conventional PD solution, and 13 studies (1291 participants) compared icodextrin with conventional PD solution. Risk of bias was assessed as high for sequence generation in three studies, allocation concealment in three studies, attrition bias in 21 studies, and selective outcome reporting bias in 16 studies. Neutral pH, low GDP versus conventional glucose PD solution Use of neutral pH, low GDP PD solutions improved residual renal function (RRF) preservation (15 studies, 835 participants: SMD 0.19, 95% CI 0.05 to 0.33; high certainty evidence). This approximated to a mean difference in glomerular filtration rate of 0.54 mL/min/1.73 m(2) (95% CI 0.14 to 0.93). Better preservation of RRF was evident at all follow‐up durations with progressively greater preservation observed with increasing follow up duration. Neutral pH, low GDP PD solution use also improved residual urine volume preservation (11 studies, 791 participants: MD 114.37 mL/day, 95% CI 47.09 to 181.65; high certainty evidence). In low certainty evidence, neutral pH, low GDP solutions may make little or no difference to 4‐hour peritoneal ultrafiltration (9 studies, 414 participants: SMD ‐0.42, 95% CI ‐0.74 to ‐0.10) which approximated to a mean difference in peritoneal ultrafiltration of 69.72 mL (16.60 to 122.00 mL) lower, and may increase dialysate:plasma creatinine ratio (10 studies, 746 participants: MD 0.01, 95% CI 0.00 to 0.03), technique failure or death compared with conventional PD solutions. It is uncertain whether neutral pH, low GDP PD solution use led to any differences in peritonitis occurrence, hospitalisation, adverse events (6 studies, 519 participants) or inflow pain (1 study, 58 participants: RR 0.51, 95% CI 0.24 to 1.08). Glucose polymer (icodextrin) versus conventional glucose PD solution In moderate certainty evidence, icodextrin probably reduced episodes of uncontrolled fluid overload (2 studies, 100 participants: RR 0.30, 95% CI 0.15 to 0.59) and augmented peritoneal ultrafiltration (4 studies, 102 participants: MD 448.54 mL/d, 95% CI 289.28 to 607.80) without compromising RRF (4 studies, 114 participants: SMD 0.12, 95% CI ‐0.26 to 0.49; low certainty evidence) which approximated to a mean creatinine clearance of 0.30 mL/min/1.73m(2) higher (0.65 lower to 1.23 higher) or urine output (3 studies, 69 participants: MD ‐88.88 mL/d, 95% CI ‐356.88 to 179.12; low certainty evidence). It is uncertain whether icodextrin use led to any differences in adverse events (5 studies, 816 participants) technique failure or death. AUTHORS' CONCLUSIONS: This updated review strengthens evidence that neutral pH, low GDP PD solution improves RRF and urine volume preservation with high certainty. These effects may be related to increased peritoneal solute transport and reduced peritoneal ultrafiltration, although the evidence for these outcomes is of low certainty due to significant heterogeneity and suboptimal methodological quality. Icodextrin prescription increased peritoneal ultrafiltration and mitigated uncontrolled fluid overload with moderate certainty. The effects of either neutral pH, low GDP solution or icodextrin on peritonitis, technique survival and patient survival remain uncertain and require further high quality, adequately powered RCTs.
- Published
- 2018
31. Burn Nurse Competencies: Developing Consensus Using E-Delphi Methodology
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Jill L. Sproul, Kathleen A. Hollowed, Bradley J Wiggins, Gretchen J. Carrougher, and Elizabeth A. Mann-Salinas
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Nursing practice ,Core set ,Consensus ,Registered nurse ,Delphi Technique ,business.industry ,Rehabilitation ,Delphi method ,MEDLINE ,Specialty ,030208 emergency & critical care medicine ,Professional practice ,03 medical and health sciences ,0302 clinical medicine ,Nursing ,Emergency Medicine ,Medicine ,Humans ,Surgery ,030212 general & internal medicine ,Clinical Competence ,Clinical competence ,business ,Burns ,Education, Nursing - Abstract
Competency standards for nurses who specialize in the care of burn-injured patients are lacking. Currently, there are no nationally agreed on standards that define safe and competent burn nursing practice. In 2014, nurse members of the American Burn Association proposed the Burn Nurse Competency Initiative (BNCI) with the intent of establishing a core set of competency standards for burn nursing. The BNCI used the Delphi technique of consensus building with input from up to 178 registered nurse burn care experts. This article describes the multistaged consensus-building process used and provides a final list of competencies. These newly created competencies now define professional practice standards for burn nurses. Their creation completes one of the essential steps required for burn nursing to be recognized as a specialty.
- Published
- 2018
32. Manufacturing the Industrial Citizen
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Bradford J. Wiggins, Joseph A. Ostenson, and Joshua W. Clegg
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Higher education ,business.industry ,media_common.quotation_subject ,05 social sciences ,Neoliberalism ,050109 social psychology ,Resistance (psychoanalysis) ,Public relations ,050105 experimental psychology ,Precarity ,Vocational education ,Political science ,0501 psychology and cognitive sciences ,Organizational structure ,Bureaucracy ,business ,Curriculum ,media_common - Abstract
Over the last half-century, we have seen a widely documented shift toward neoliberal, (new) managerial, and industrial institutions of higher learning. In this chapter, we briefly outline this trend and provide an analysis of how it shapes the persons and communities that make up higher education. Specifically, we discuss how the changes in curriculum (from liberal to technical and vocational), organizational structure (from relational to managerial), and funding (decreased state and increased private funding) constitute a new framework for the industrialized student and teacher. This framework follows a fairly typical neoliberal script: Within higher education, we see the imposition of surveillance (assessment) to enforce conformism (standardization), and we likewise see the weakening of the capacity for any resistance, accomplished both through the engineering of precarity (defunding) and through an artificially narrowed public vision (vocationalized curriculum). We argue here that shifts of these kinds socialize scholars, whether student or faculty, into a system-aligned worldview—that is, into a narrow, conformist, bureaucratic consciousness and a politically neutral, largely consumerist conception of public life. Higher education is thus being maneuvered (not without resistance) away from the education of a publicly engaged, creative, alert citizenry and toward the socialization of the industrialized citizen—a more-or-less interchangeable, easily manageable component in a mass “economy.”
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- 2018
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33. Renal allograft re-use and herpetic re-infection
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William R. Mulley, Anthony Landgren, Peter G. Kerr, Kate J Wiggins, Peter Hughes, Stephen G Holt, Helen Opdam, Khashayar Asadi, Damon P. Eisen, Amanda Robertson, Stella Setyapranata, and Andrew R. J. Young
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Ganciclovir ,Pathology ,medicine.medical_specialty ,Kidney ,Donor selection ,business.industry ,viruses ,Valganciclovir ,General Medicine ,medicine.disease ,Transplantation ,medicine.anatomical_structure ,Nephrology ,medicine ,Viral hepatitis ,business ,Viral load ,Kidney transplantation ,medicine.drug - Abstract
A middle-aged man received a kidney transplant from a deceased multi-organ donor. The recipient suffered cardiac arrest several days post-operatively and sustained hypoxic brain injury and was declared brain dead. Following the family's consent, the allograft kidney was retrieved and re-transplanted into a man with end-stage renal failure secondary to reflux nephropathy. The liver was not transplanted due to suspicion of fatty changes based on macroscopic appearance. After transplantation of other organs, liver histology revealed coagulative parenchymal necrosis with nuclear inclusions and moderate parenchymal cholestasis, suggestive of herpes viral hepatitis. Renal implantation biopsy showed histiocytes with enlarged nuclei containing viral inclusions in the capsular fibrous tissue, with positive immunostaining for herpes simplex virus (HSV). Anti-viral therapy was commenced immediately after obtaining histological evidence of donor HSV infection. Our recipient had pre-formed immunoglobulin G antibodies to HSV-1 and HSV-2, and was immunoglobulin M negative pre-transplant. HSV viraemia was detected day 5 post-transplant with a viral load of 7688 copies/mL by polymerase chain reaction assay. The recipient completed a 30 day course of intravenous ganciclovir before switching to oral valganciclovir as standard cytomegalovirus prophylaxis. The HSV polymerase chain reaction became undetectable on day 7 of intravenous ganciclovir and has remained undetectable. The patient remains well 9 months post-transplant with an estimated glomerular filtration rate of 61 mL/min per 1.73 m2. Although renal allograft re-use has been shown to be technically possible with a good outcome in this recipient, this does raise issues including assessment of allografts that have undergone repeated severe ischaemic insults and the potential of transmission of infections.
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- 2015
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34. An enlarging pedunculated nodule on the shoulder of a 21-year-old man
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Alexa R. Shipman, T. Mentzel, J. Wiggins, and Richard A. Carr
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Nodule (geology) ,Male ,Shoulder ,Skin Neoplasms ,Histiocytoma, Benign Fibrous ,business.industry ,Dermoscopy ,Dermatology ,Anatomy ,engineering.material ,Immunohistochemistry ,Diagnosis, Differential ,030207 dermatology & venereal diseases ,03 medical and health sciences ,Young Adult ,0302 clinical medicine ,030220 oncology & carcinogenesis ,engineering ,Medicine ,Humans ,business ,Skin - Published
- 2017
35. Review of 'Global Surgery
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Claire J. Wiggins and Larry H. Hollier
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medicine.medical_specialty ,Otorhinolaryngology ,business.industry ,Medicine ,Surgery ,General Medicine ,business - Published
- 2019
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36. 220 Supporting Burn Nurse Competencies with Education
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A Wubbels, Kristy Gauthier, C Carper, Bradley J Wiggins, and Lois Remington
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Burn therapy ,Social work ,business.industry ,medicine.medical_treatment ,Rehabilitation ,Respiratory therapist ,Pain management ,Wound care ,Nursing ,Discharge planning ,Emergency Medicine ,Medicine ,Surgery ,business - Published
- 2019
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37. Review of 'A Structured Compensation Plan Improves But Does Not Erase the Sex Pay Gap in Surgery' by Morris M et al in Ann Surg 268
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Claire J. Wiggins and Larry H. Hollier
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Otorhinolaryngology ,business.industry ,Medicine ,Surgery ,Operations management ,General Medicine ,Plan (drawing) ,business ,Compensation (engineering) - Published
- 2019
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38. Review of 'A Structured Compensation Plan Improves But Does Not Erase the Sex Pay Gap in Surgery' by Morris M, Chen H, Heslin MJ, Krontiras H in Ann Surg 268
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Larry H. Hollier and Claire J. Wiggins
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Otorhinolaryngology ,business.industry ,Medicine ,Surgery ,Operations management ,General Medicine ,Plan (drawing) ,business ,Compensation (engineering) - Published
- 2018
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39. Study design of ASPirin in Reducing Events in the Elderly (ASPREE): A randomized, controlled trial
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E. Volpi, S. Katzman, A. A. Anwarrulah, B. Lewis, C. Womack, P. Wilson, Erica M. Wood, E. Hadley, J. Keller, M. Kidd, K. Dodd, Sharyn M. Fitzgerald, B. Ference, W. B. Applegate, Shawna D. Nesbitt, Walter P. Abhayaratna, S. V. Romashkan, M. Lang, V. A. Atlanta, Gerard Gill, J. Powell, T. Obisesan, Latha Palaniappan, M. Malik, A. Le, R. Swerdlow, C. Eaton, David Ames, J. Burns, H. Anderson, Elsdon Storey, Jessica E. Lockery, C. I. Johnston, Mark Nelson, J. Hannah, R. Head, Geoffrey A. Donnan, P. Bolin, T. Johnson, Andrew Tonkin, A. Newman, Christopher M. Reid, R. C. Shah, G. Pressman, A. Thomas, S. Satterfield, J. Weissfeld, Kevin A. Peterson, B. Radziszewska, J. Williamson, D. Gilbertson, John J McNeil, J. Flack, Jamehl S. Demons, K. Margolis, Nigel Stocks, Priscilla Pemu, J. Allard, James M. Shikany, Barbara Workman, L. Beilin, M. Singh, S. Anton, V. Figueredo, Peter Gibbs, P. Lichtenberg, Marco Pahor, M. Ernst, M. Ahmad, C. Jackson, Rory Wolfe, Sara E. Espinoza, M. Mikhail, F. MacRae, H. Krum, L. Cobiac, Lee A Birnbaum, J. Wiggins, V. Myers, W. Applegate, Nathan E. Britt, S. Krstevska, A. B. Newman, M. Oberoi, G. Russell, A. Gupta, D. Kruger, Robyn L. Woods, T. Church, R. E. Trevaks, B. Kirpach, Anne M Murray, R. Shah, Ron Monce, H. Tindle, M. Jelnik, L. M. Rodriguez, J. Aloia, B. Ott, L. Nyquist, R. Grimm, K. C. Johnson, C. Lawson, R. Allman, and P. Jose
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Male ,medicine.medical_specialty ,Activities of daily living ,Physical disability ,Risk Assessment ,Article ,law.invention ,Double-Blind Method ,Randomized controlled trial ,law ,Neoplasms ,Internal medicine ,Activities of Daily Living ,medicine ,Clinical endpoint ,Humans ,Dementia ,Cognitive Dysfunction ,Disabled Persons ,Pharmacology (medical) ,Mortality ,Depression (differential diagnoses) ,Aged ,Aspirin ,Depression ,business.industry ,Anti-Inflammatory Agents, Non-Steroidal ,Australia ,General Medicine ,medicine.disease ,United States ,Clinical trial ,Cardiovascular Diseases ,Physical therapy ,Female ,Tablets, Enteric-Coated ,Gastrointestinal Hemorrhage ,business ,medicine.drug - Abstract
Cost-effective strategies to maintain healthy active lifestyle in aging populations are required to address the global burden of age-related diseases. ASPREE will examine whether the potential primary prevention benefits of low dose aspirin outweigh the risks in older healthy individuals. Our primary hypothesis is that daily oral 100. mg enteric-coated aspirin will extend a composite primary endpoint termed 'disability-free life' including onset of dementia, total mortality, or persistent disability in at least one of the Katz Activities of Daily Living in 19,000 healthy participants aged 65. years and above ('US minorities') and 70. years and above (non-'US minorities'). ASPREE is a double-blind, randomized, placebo-controlled trial of oral 100. mg enteric-coated acetyl salicylic acid (ASA) or matching placebo being conducted in Australian and US community settings on individuals free of dementia, disability and cardiovascular disease (CVD) events. Secondary endpoints are all-cause and cause specific mortality, fatal and non-fatal cardiovascular events, fatal and non-fatal cancer (excluding non-melanoma skin cancer), dementia, mild cognitive impairment, depression, physical disability, and clinically significant bleeding. To 20 September 2013 14,383 participants have been recruited. Recruitment and study completion are anticipated in July 2014 and December 2018 respectively. In contrast to other aspirin trials that have largely focused on cardiovascular endpoints, ASPREE has a unique composite primary endpoint to better capture the overall risk and benefit of aspirin to extend healthy independent lifespan in older adults in the US and Australia.
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- 2013
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40. KHA-CARI Guideline: Early chronic kidney disease: Detection, prevention and management
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Richard Ks Phoon, David W. Johnson, Maria F. Chan, Nigel D Toussaint, Tim Usherwood, Graeme L Turner, Emelia Atai, Kathryn J. Wiggins, and Clodagh Scott
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medicine.medical_specialty ,Screening test ,business.industry ,Life style ,MEDLINE ,Early detection ,General Medicine ,Guideline ,urologic and male genital diseases ,medicine.disease ,female genital diseases and pregnancy complications ,Screening programme ,Nephrology ,Primary health ,medicine ,Intensive care medicine ,business ,Kidney disease - Abstract
Early detection of CKD may therefore have value,although criteria for a screening programme to detect thedisease must be met to balance the aggregate benefits withthe risks and costs of the screening tests. General practition-ers, in particular, play a crucial role in CKD early detectionand management. All people attending their general practi-tioner should be assessed for CKD risk factors as part ofroutine primary health encounters.A number of studies
- Published
- 2013
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41. Impact of icodextrin on clinical outcomes in peritoneal dialysis: a systematic review of randomized controlled trials
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Sunil V. Badve, David W. Johnson, Yeoungjee Cho, Giovanni F.K. Strippoli, Kathryn J. Wiggins, and Jonathan C. Craig
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medicine.medical_specialty ,medicine.medical_treatment ,Peritonitis ,Renal function ,Icodextrin ,Peritoneal dialysis ,law.invention ,Randomized controlled trial ,law ,Dialysis Solutions ,Internal medicine ,medicine ,Humans ,Adverse effect ,Glucans ,Randomized Controlled Trials as Topic ,Transplantation ,business.industry ,Prognosis ,medicine.disease ,Confidence interval ,Surgery ,Survival Rate ,Review Literature as Topic ,Glucose ,Nephrology ,Relative risk ,Kidney Failure, Chronic ,business ,Peritoneal Dialysis - Abstract
Background. Although icodextrin has been shown to augment peritoneal ultrafiltration in peritoneal dialysis (PD) patients, its impact upon other clinical end points, such as technique survival, remains uncertain. This systematic review evaluated the effect of icodextrin use on patient level clinical outcomes. Methods. The Cochrane CENTRAL Registry, MEDLINE, Embase and reference lists were searched (last search 13 September 2012) for randomized controlled trials of icodextrin versus glucose in the long dwell exchange. Summary estimates of effect were obtained using a random effects model. Results. Eleven eligible trials (1222 patients) were identified. There was a significant reduction in episodes of uncontrolled fluid overload [two trials; 100 patients; relative risk (RR) 0.30, 95% confidence interval (CI) 0.15-0.59] and improvement in peritoneal ultrafiltration [four trials; 102 patients; mean difference (MD) 448.54 mL/day, 95% CI 289.28-607.80] without compromising residual renal function [four trials; 114 patients; standardized MD (SMD) 0.12, 95% CI -0.26 to 0.49] or urine output (three trials; 69 patients; MD -88.88, 95% CI -356.88 to 179.12) with icodextrin use for up to 2 years. There was no significant effect on peritonitis incidence (five trials; 607 patients; RR 0.97, 95% CI 0.76-1.23), peritoneal creatinine clearance (three trials; 237 patients; SMD 0.36, 95% CI -0.24 to 0.96), technique failure (three trials; 290 patients; RR 0.58, 95% CI 0.28-1.20), patient survival (six trials; 816 patients; RR 0.82, 95% CI 0.32-2.13) or adverse events. Conclusions. Icodextrin prescription improved peritoneal ultrafiltration, mitigated uncontrolled fluid overload and was not associated with increased risk of adverse events. No effects of icodextrin on technique or patient survival were observed, although trial sample sizes and follow-up durations were limited.
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- 2013
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42. Daily Variation in Death in Patients Treated by Long-term Dialysis: Comparison of In-Center Hemodialysis to Peritoneal and Home Hemodialysis
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David W. Johnson, Sunil V. Badve, Kym M. Bannister, Philip A. Clayton, Neil Boudville, Carmel M. Hawley, Kevan R. Polkinghorne, Fiona G. Brown, Rathika Krishnasamy, Stephen P. McDonald, and Kathryn J. Wiggins
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Male ,medicine.medical_specialty ,medicine.medical_treatment ,Myocardial Infarction ,Hemodialysis, Home ,Peritoneal dialysis ,Sudden cardiac death ,Cohort Studies ,Renal Dialysis ,Internal medicine ,Prevalence ,medicine ,Humans ,Registries ,Myocardial infarction ,Intensive care medicine ,Dialysis ,Aged ,Retrospective Studies ,Aged, 80 and over ,business.industry ,Home hemodialysis ,Australia ,Retrospective cohort study ,Middle Aged ,medicine.disease ,Death, Sudden, Cardiac ,Hemodialysis Units, Hospital ,Nephrology ,Hyperkalemia ,Kidney Failure, Chronic ,Female ,Hemodialysis ,business ,Peritoneal Dialysis ,New Zealand ,Cohort study - Abstract
There has been little study to date of daily variation in cardiac death in dialysis patients and whether such variation differs according to dialysis modality and session frequency.Observational cohort study using ANZDATA (Australia and New Zealand Dialysis and Transplant) Registry data.All adult patients with end-stage kidney failure treated by dialysis in Australia and New Zealand who died between 1999 and 2008.Timing of death (day of week), dialysis modality, hemodialysis (HD) session frequency, and demographic, clinical, and facility variables.Cardiac and noncardiac mortality.14,636 adult dialysis patients died during the study period (HD, n = 10,338; peritoneal dialysis [PD], n = 4,298). Cardiac death accounted for 40% of deaths and was significantly more likely to occur on Mondays in in-center HD patients receiving 3 or fewer dialysis sessions per week (n = 9,503; adjusted OR, 1.26; 95% CI, 1.14-1.40; P0.001 compared with the mean odds of cardiac death for all days of the week). This daily variation in cardiac death was not seen in PD patients, in-center HD patients receiving more than 3 sessions per week (n = 251), or home HD patients (n = 573). Subgroup analyses showed that deaths related to hyperkalemia and myocardial infarction also were associated with daily variation in risk in HD patients. This pattern was not seen for vascular, infective, malignant, dialysis therapy withdrawal, or other deaths.Limited covariate adjustment. Residual confounding and coding bias could not be excluded. Possible type 2 statistical error due to limited sample size of home HD and enhanced-frequency HD cohorts.Daily variation in the pattern of cardiac deaths was observed in HD patients receiving 3 or fewer dialysis sessions per week, but not in PD, home HD, and HD patients receiving more than 3 sessions per week.
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- 2013
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43. An Examination of a Yoga Intervention With Pediatric Burn Survivors
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Amy S. Conn, Carolyn Memmott, Timothy A. Brusseau, Morgan S. Hall, Kristen C. Quinn, and Bradley J Wiggins
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Male ,medicine.medical_specialty ,education ,Anxiety ,Cohort Studies ,03 medical and health sciences ,0302 clinical medicine ,Intervention (counseling) ,Surveys and Questionnaires ,medicine ,Humans ,030212 general & internal medicine ,Child ,business.industry ,Yoga ,Rehabilitation ,030208 emergency & critical care medicine ,Cognition ,humanities ,Somatic anxiety ,Test (assessment) ,Treatment Outcome ,Emergency Medicine ,Physical therapy ,Surgery ,Female ,Pediatric burn ,medicine.symptom ,business ,Burns ,human activities ,Psychosocial ,Cohort study - Abstract
Burn injuries have a major influence on the survivors' physical and psychological functioning. In pediatric burns, the consequences persist long after the injury. The objective of this study is to evaluate an existing yoga kids program to gain better understanding of the physical and psychosocial effects of a yoga practice among children with burn injuries. Thirty campers participated in a series of four (1 hour) yoga sessions during the summer of 2014. Nationally trained Instructors had taught children's yoga in the Southwestern United States for at least 10 years. A Yoga Evaluation Questionnaire, designed for children, was used to evaluate perceptions of somatic and cognitive anxiety before and after each Yoga session. Camper's age ranged from 6 to 12 years old with burn severities ranging from 5 to 75%. A dependent samples t-test was used to test for differences between composite pre- and postintervention scores for both somatic and cognitive anxiety. Significant effects emerged for somatic anxiety t(29) = -4.24, P < .001, d = 0.77, and cognitive anxiety t(29) = -4.188, P < .001, d = 0.76. For both cognitive and somatic anxiety, the postintervention composite mean scores were significantly higher, indicating a decrease in somatic and cognitive anxiety. This study suggests that participation in a Yoga program may lower perceptions of cognitive and somatic anxiety in pediatric burn survivors. Further, Yoga is one technique that may compliment the short- and long-term treatment of burn injuries.
- Published
- 2016
44. Recent Peritonitis Associates with Mortality among Patients Treated with Peritoneal Dialysis
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Anna Kemp, Sunil V. Badve, Stephen P. McDonald, Neil Boudville, Wai H. Lim, Fiona G. Brown, Kathryn J. Wiggins, Kym M. Bannister, David W. Johnson, Philip A. Clayton, and Carmel M. Hawley
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Male ,medicine.medical_specialty ,Time Factors ,medicine.medical_treatment ,Peritonitis ,Peritoneal dialysis ,Internal medicine ,medicine ,Humans ,Clinical Epidemiology ,Major complication ,Dialysis ,Aged ,Aged, 80 and over ,biology ,business.industry ,C-reactive protein ,Australia ,General Medicine ,Odds ratio ,Middle Aged ,medicine.disease ,Confidence interval ,Surgery ,Logistic Models ,Nephrology ,biology.protein ,Female ,Hemodialysis ,business ,Peritoneal Dialysis ,New Zealand - Abstract
Peritonitis is a major complication of peritoneal dialysis, but the relationship between peritonitis and mortality among these patients is not well understood. In this case-crossover study, we included the 1316 patients who received peritoneal dialysis in Australia and New Zealand from May 2004 through December 2009 and either died on peritoneal dialysis or within 30 days of transfer to hemodialysis. Each patient served as his or her own control. The mean age was 70 years, and the mean time receiving peritoneal dialysis was 3 years. In total, there were 1446 reported episodes of peritonitis with 27% of patients having ≥ 2 episodes. Compared with the rest of the year, there were significantly increased odds of peritonitis during the 120 days before death, although the magnitude of this association was much greater during the 30 days before death. Compared with a 30-day window 6 months before death, the odds for peritonitis was six-fold higher during the 30 days immediately before death (odds ratio, 6.2; 95% confidence interval, 4.4-8.7). In conclusion, peritonitis significantly associates with mortality in peritoneal dialysis patients. The increased odds extend up to 120 days after an episode of peritonitis but the magnitude is greater during the initial 30 days.
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- 2012
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45. Repeated Peritoneal Dialysis–Associated Peritonitis: A Multicenter Registry Study
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Stephen P. McDonald, Carmel M. Hawley, Thulasi Thirugnanasambathan, Philip A. Clayton, Sunil V. Badve, David W. Johnson, Fiona G. Brown, Neil Boudville, Kym M. Bannister, and Kathryn J. Wiggins
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Male ,medicine.medical_specialty ,medicine.medical_treatment ,Peritonitis ,Logistic regression ,Peritoneal dialysis ,Cohort Studies ,Recurrence ,Internal medicine ,medicine ,Humans ,Registries ,Dialysis ,business.industry ,Mortality rate ,Confounding ,Australia ,Middle Aged ,medicine.disease ,Surgery ,Nephrology ,Female ,Hemodialysis ,business ,Peritoneal Dialysis ,Cohort study - Abstract
Background Determinants and outcomes of peritoneal dialysis (PD)-associated peritonitis occurring within 4 weeks of completion of therapy of a prior episode caused by the same (relapse) or different organism (recurrence) recently have been characterized. However, determinants and outcomes of peritonitis occurring more than 4 weeks after treatment of a prior episode caused by the same (repeated) or different organism (nonrepeated) are poorly understood. Study Design Observational cohort study using Australia and New Zealand Dialysis and Transplant Registry (ANZDATA) data. Setting & Participants All Australian PD patients between October 1, 2003, and December 31, 2007, with first episodes of repeated or nonrepeated peritonitis. Predictors Repeated versus nonrepeated peritonitis, according to International Society of PD (ISPD) criteria. Outcomes & Measurements Relapse, hospitalization, catheter removal, hemodialysis transfer, and death. Results After a peritonitis episode, the probability that a subsequent episode represented repeated rather than nonrepeated peritonitis was highest in the second month (41%), then progressively decreased to a stable level of 14% from 6 months onward. When first episodes of repeated (n = 245) or nonrepeated peritonitis (n = 824) were analyzed, repeated peritonitis was predicted independently by a shorter elapsed time from the prior episode (adjusted OR per day elapsed, 0.91; 95% CI, 0.88-0.94). Staphylococcus aureus and coagulase-negative staphylococcus were isolated more frequently in repeated peritonitis, whereas Gram-negative, streptococcal, and fungal organisms were recovered more frequently in nonrepeated peritonitis. Using multivariate logistic regression, repeated peritonitis was associated independently with higher relapse (OR, 5.41; 95% CI, 3.72-7.89) and lower hospitalization rates (OR, 0.63; 95% CI, 0.46-0.85), but catheter removal, hemodialysis transfer, and death rates similar to nonrepeated peritonitis. Limitations Limited covariate adjustment. Residual confounding and coding bias could not be excluded. Conclusions Repeated and nonrepeated peritonitis episodes are caused by different spectra of micro-organisms and have different outcomes. Study findings suggest that the ISPD definition for repeated peritonitis should be limited to 6 months.
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- 2012
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46. PO-0894: Comparing the spatial integrity of 7 T and 3 T MR images for image-guided radiotherapy of brain tumors
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F.M. Janssen, Jurgen Peerlings, Inge Compter, Felix M. Mottaghy, Aswin L. Hoffmann, P. Lambin, and Christopher J. Wiggins
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Oncology ,business.industry ,Medicine ,Radiology, Nuclear Medicine and imaging ,Hematology ,Mr images ,business ,Nuclear medicine ,Image guided radiotherapy - Published
- 2017
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47. Effect of Dialysis Modality on Survival of Hepatitis C-Infected ESRF Patients
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Carmel M. Hawley, Sunil V. Badve, Fiona G. Brown, Neil Boudville, Kym M. Bannister, Bhadran Bose, Philip A. Clayton, David W. Johnson, Stephen P. McDonald, and K. J. Wiggins
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Adult ,medicine.medical_specialty ,Time Factors ,Epidemiology ,medicine.medical_treatment ,Critical Care and Intensive Care Medicine ,Risk Assessment ,Peritoneal dialysis ,Renal Dialysis ,Risk Factors ,Internal medicine ,medicine ,Humans ,Registries ,Survival rate ,Dialysis ,Aged ,Proportional Hazards Models ,Retrospective Studies ,Transplantation ,Chi-Square Distribution ,business.industry ,Proportional hazards model ,Mortality rate ,Hazard ratio ,Australia ,Original Articles ,Hepatitis C ,Hepatitis C Antibodies ,Middle Aged ,medicine.disease ,Survival Analysis ,Surgery ,Survival Rate ,Treatment Outcome ,Nephrology ,Kidney Failure, Chronic ,Hemodialysis ,business ,Peritoneal Dialysis ,Biomarkers ,New Zealand - Abstract
Summary Background and objectives Hepatitis C virus (HCV) infection is associated with increased mortality and morbidity in end-stage renal failure (ESRF) patients. Despite a lower incidence and risk of transmission of HCV infection with peritoneal dialysis (PD), the optimal dialysis modality for HCV-infected ESRF patients is not known. The aim of this study was to evaluate the impact of dialysis modality on the survival of HCV-infected ESRF patients. Design, setting, participants, & measurements The study included all adult incident ESRF patients in Australia and New Zealand who commenced dialysis between January 1, 1994, and December 31, 2008, and were HCV antibody-positive at the time of dialysis commencement. Time to all-cause mortality was compared between hemodialysis (HD) and PD according to modality assignment at day 90, using Cox proportional hazards model analysis. Results A total of 424 HCV-infected ESRF patients commenced dialysis during the study period and survived for at least 90 days (PD n = 134; HD n = 290). Mortality rates were comparable between PD and HD in the first year (10.7 versus 13.8 deaths per 100 patient-years, respectively; adjusted hazard ratio [HR] 0.65, 95% CI 0.34 to 1.26) and thereafter (20 versus 15.9 deaths per 100 patient-years, respectively; HR 1.27, 95% CI 0.86 to 1.88). Conclusions The survival of HCV-infected ESRF patients is comparable between PD and HD.
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- 2011
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48. Direct visualization of non-human primate subcortical nuclei with contrast-enhanced high field MRI
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Bechir Jarraya, Stéphane Palfi, Denis Le Bihan, Hirokazu Iwamuro, Olivier Joly, Wim Vanduffel, Lynn Uhrig, Naoki Tani, Cyril Poupon, Christopher J. Wiggins, and Hauke Kolster
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Male ,Aging ,Deep brain stimulation ,Cognitive Neuroscience ,medicine.medical_treatment ,media_common.quotation_subject ,Individuality ,Signal-To-Noise Ratio ,Basal Ganglia ,Subthalamic Nucleus ,Basal ganglia ,Image Processing, Computer-Assisted ,medicine ,Animals ,Contrast (vision) ,Probability ,media_common ,Brain Mapping ,Non human primate ,business.industry ,Macaca mulatta ,Magnetic Resonance Imaging ,Electrophysiological Phenomena ,Visualization ,Subthalamic nucleus ,Electrophysiology ,Neurology ,Female ,Brainstem ,business ,Microelectrodes ,Neuroscience ,Algorithms ,Brain Stem - Abstract
Subcortical nuclei are increasingly targeted for deep brain stimulation (DBS) and for gene transfer to treat neurological and psychiatric disorders. For a successful outcome in patients, it is critical to place DBS electrodes or infuse viral vectors accurately within targeted nuclei. However current MRI approaches are still limited to localize brainstem and basal ganglia nuclei accurately. By combining ultra-high resolution structural MRI and contrast-enhanced MRI using iron oxide nanoparticles at high field (3 T and 7 T), we could precisely locate the subcortical nuclei, in particular the subthalamic nucleus in macaques, and validate this location by intracranial electrophysiological mapping. The present data pave the way to a clinical application.
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- 2011
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49. Use of aminoglycosides for peritoneal dialysis-associated peritonitis does not affect residual renal function
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Neil Boudville, Stephen P. McDonald, Kathryn J. Wiggins, Sunil V. Badve, Carmel M. Hawley, David W. Johnson, Fiona G. Brown, and Kym M. Bannister
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Male ,medicine.medical_specialty ,medicine.drug_class ,medicine.medical_treatment ,Antibiotics ,Peritonitis ,Renal function ,Bacteremia ,Kidney ,Gastroenterology ,Peritoneal dialysis ,Risk Factors ,Interquartile range ,Internal medicine ,Humans ,Medicine ,Transplantation ,business.industry ,Aminoglycoside ,Middle Aged ,Prognosis ,medicine.disease ,Surgery ,Aminoglycosides ,medicine.anatomical_structure ,Nephrology ,Kidney Failure, Chronic ,Female ,business ,Peritoneal Dialysis ,Follow-Up Studies ,Glomerular Filtration Rate - Abstract
Aminoglycosides offer several potential benefits in their treatment of peritoneal dialysis (PD)-associated peritonitis, including low cost, activity against Gram-negative organisms (including Pseudomonas aeruginosa), synergistic bactericidal activity against some Gram-positive organisms (such as Staphylococci) and relatively low propensity to promote antimicrobial resistance. However, there is limited conflicting evidence that aminoglycosides may accelerate loss of residual renal function (RRF) in PD patients. The aim of this study was to study the effect of aminoglycoside use on slope of decline in RRF.The study included 2715 Australian patients receiving PD between October 2003 and December 2007 in whom at least two measurements of renal creatinine clearance were available. Patients were divided according to tertiles of slope of RRF decline (rapid, intermediate and slow). The primary outcome was the slope of RRF over time in patients who received aminoglycosides for PD peritonitis versus those who did not.A total of 1412 patients (52%) experienced at least one episode of PD peritonitis. An aminoglycoside was used as the initial empiric antibiotic in 1075 patients. The slopes of RRF decline were similar in patients treated and not treated with at least one course of aminoglycoside (median [interquartile range] -0.26 [-1.17 to 0.04] mL/min/1.73 m(2)/month versus -0.22 [-1.11 to 0.01] mL/min/1.73 m(2)/month, P = 0.9). The slopes of RRF decline were also similar in patients receiving repeated courses of aminoglycoside.Empiric treatment with aminoglycoside for peritonitis was not associated with an adverse effect on RRF in PD patients.
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- 2011
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50. Predictors, treatment, and outcomes of non-Pseudomonas Gram-negative peritonitis
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Johan B. Rosman, Kathryn J. Wiggins, David W. Johnson, Kym M. Bannister, Fiona G. Brown, Carmel M. Hawley, Stephen P. McDonald, and Elizabeth Jarvis
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Male ,medicine.medical_specialty ,medicine.drug_class ,medicine.medical_treatment ,Antibiotics ,Peritonitis ,continuous ambulatory peritoneal dialysis ,antibiotics ,Peritoneal dialysis ,Risk Factors ,Internal medicine ,Humans ,Medicine ,Registries ,Risk factor ,bacteria ,Survival rate ,Aged ,business.industry ,microbiology ,Remission Induction ,Continuous ambulatory peritoneal dialysis ,Age Factors ,Australia ,Middle Aged ,Prognosis ,medicine.disease ,Anti-Bacterial Agents ,Surgery ,Survival Rate ,Treatment Outcome ,Nephrology ,Female ,Hemodialysis ,Gram-Negative Bacterial Infections ,business ,Complication ,Peritoneal Dialysis ,enterobacteriaceae - Abstract
Non-Pseudomonas Gram-negative (NPGN) peritonitis is a frequent, serious complication of peritoneal dialysis; however, previous reports have been limited to small, single-center studies. To gain insight on the frequency, predictors, treatment, and outcomes of NPGN peritonitis, we analyzed data in the ANZDATA registry of all adult Australian peritoneal dialysis patients over a 39-month period using multivariate logistic and multilevel Poisson regressions. There were 837 episodes of NPGN peritonitis (23.3% of all peritonitis) that occurred in 256 patients. The most common organism isolated was Escherichia coli, but included Klebsiella, Enterobacter, Serratia, Acinetobacter, Proteus, and Citrobacter, with multiple organisms identified in a quarter of the patients. The principal risk factor was older age, with poorer clinical outcome predicted by older age and polymicrobial peritonitis. The overall antibiotic cure rate was 59%. NPGN peritonitis was associated with significantly higher risks of hospitalization, catheter removal, permanent transfer to hemodialysis, and death compared to other organisms contributing to peritonitis. Underlying bowel perforation requiring surgery was uncommon. Hence, we show that NPGN peritonitis is a frequent, serious complication of peritoneal dialysis, which is frequently associated with significant risks, including death. Its cure with antibiotics alone is less likely when multiple organisms are involved.
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- 2010
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