82 results on '"Vaz K"'
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2. NAFLD and MAFLD independently increase the risk of major adverse cardiovascular events (MACE): a 20-year longitudinal follow-up study from regional Australia
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Vaz, K, Kemp, W, Majeed, A, Lubel, J, Magliano, DJ, Glenister, KM, Bourke, L, Simmons, D, Roberts, SK, Vaz, K, Kemp, W, Majeed, A, Lubel, J, Magliano, DJ, Glenister, KM, Bourke, L, Simmons, D, and Roberts, SK
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BACKGROUND AND AIMS: The association between fatty liver disease (FLD) and cardiovascular disease (CVD) in an Australian context has yet to be defined. The primary aim of this study was to investigate the association between FLD and 3-point major adverse cardiovascular events (MACE). METHODS: This was a longitudinal follow-up study of a randomly sampled adult cohort from regional Australia between 2001 and 2003. Baseline covariates included demographic details, anthropometry, health and lifestyle data, and laboratory tests. Non-alcoholic fatty liver disease (NAFLD) and metabolic-(dysfunction) associated fatty liver disease (MAFLD) were diagnosed in participants with fatty liver index (FLI) ≥ 60 and meeting other standard criteria. ICD-10 codes were used to define clinical outcomes linked to hospitalisations. Three-point MACE defined as non-fatal myocardial infarction (MI) and cerebrovascular accident (CVA) and CVD death. RESULTS: In total, 1324 and 1444 participants met inclusion criteria for NAFLD and MAFLD analysis, respectively. Over 23,577 and 25,469 person-years follow-up, NAFLD and MAFLD were independent predictors for 3-point MACE, adjusting for demographic covariates and known cardiometabolic risk factors, whilst considering non-CVD death as a competing event (NAFLD: sub-hazard ratio [sHR] 1.56, 95% confidence interval [CI 1.12-2.19]; MAFLD: sHR 1.51, 95% CI 1.11-2.06). The results held true on several sensitivity analyses. CONCLUSIONS: Both forms of FLD increase the risk for CVD independent of traditional cardiometabolic risk factors.
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- 2024
3. Testosterone is lower in men with non-alcoholic fatty liver disease and alcohol-related cirrhosis and is associated with adverse clinical outcomes
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Apostolov, R, Wong, D, Low, E, Vaz, K, Spurio, J, Worland, T, Liu, D, Chan, RK, Gow, P, Grossmann, M, Sinclair, M, Apostolov, R, Wong, D, Low, E, Vaz, K, Spurio, J, Worland, T, Liu, D, Chan, RK, Gow, P, Grossmann, M, and Sinclair, M
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BACKGROUND/AIMS: Low serum testosterone is common in cirrhotic men, but the impact of disease aetiology remains uncertain. This study compares serum total testosterone (TT) levels by disease aetiology and assesses its prognostic value. METHODS: Single-centre retrospective study of cirrhotic men who had TT levels measured between 2002 and 2020. A cut-off of 12 nmol/L was used to define low TT and 230 pmol/L for calculated free testosterone (cFT). Linear and logistic regression used to adjust for variables known to affect testosterone levels and assess for an association between levels and outcomes. RESULTS: Of 766 cirrhotic men, 33.3% had alcohol-related liver disease (ALD) and 11.9% had non-alcoholic fatty liver disease (NAFLD). The median age was 56 years (interquartile range (IQR) 50-61), and the model for end-stage liver disease (MELD) score 14 (IQR 9-20). TT levels were low in 53.3% of patients, (median 11.0 nmol/L; IQR 3.7-19.8) and cFT low in 79.6% (median 122 pmol/L; IQR 48.6-212). Median TT was lower in men with ALD (7.6 nmol/L; IQR 2.1-16.2) and NAFLD (9.8 nmol/L; IQR 2.75-15.6) compared to other aetiologies (11.0 nmol/L; IQR 3.73-19.8) (p < 0.001 for all), which remained true after adjustment for age and MELD score. TT was inversely associated with 12-month mortality or transplant (381 events, p = 0.02) and liver decompensation (345 events, p = 0.004). CONCLUSIONS: Low serum testosterone is common in cirrhotic men and is associated with adverse clinical outcomes. TT levels are significantly lower in ALD and NAFLD compared to other disease aetiologies. Further large-scale studies are required to assess the potential benefits of testosterone therapy.
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- 2023
4. Non-alcoholic fatty liver disease prevalence in Australia has risen over 15 years in conjunction with increased prevalence of obesity and reduction in healthy lifestyle
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Vaz, K, Kemp, W, Majeed, A, Lubel, J, Magliano, DJ, Glenister, KM, Bourke, L, Simmons, D, Roberts, SK, Vaz, K, Kemp, W, Majeed, A, Lubel, J, Magliano, DJ, Glenister, KM, Bourke, L, Simmons, D, and Roberts, SK
- Abstract
BACKGROUND AND AIM: Non-alcoholic fatty liver disease (NAFLD) is the most prevalent liver condition globally. The aim of this study was to evaluate the change in age- and sex-standardized prevalence of NAFLD in regional Victoria over a 15-year period and explore the underlying factors associated with differences over time. METHODS: Repeated comparative cross-sectional studies in four towns in regional Victoria, Australia. Individuals randomly selected from households from residential address lists from local government organizations in 2001-2003 (CrossRoads I [CR1]) and 2016-2018 (CrossRoads II [CR2]) with 1040 (99%) and 704 (94%) participants from CR1 and CR2 having complete data for analysis. Primary outcome was change in prevalence estimates of NAFLD (defined by a fatty liver index ≥ 60 in the absence of excess alcohol and viral hepatitis) between 2003 and 2018. RESULTS: Crude prevalence of NAFLD increased from 32.7% to 38.8% (P < 0.01), while age-standardized/sex-standardized prevalence increased from 32.4% to 35.4% (P < 0.01). Concurrently, prevalence of obesity defined by BMI and elevated waist circumference increased 28% and 25%, respectively. Women had a greater increase in the prevalence of NAFLD than men, in parallel with increasing prevalence of obesity. Proportion of participants consuming takeaway food greater than once weekly increased significantly over time. Up to 60% of NAFLD patients require additional tests for assessment of significant fibrosis. CONCLUSIONS: Crude and age-standardized/sex-standardized prevalence of NAFLD have both increased significantly over the last 15 years, particularly among women, in association with a parallel rise in the prevalence of obesity.
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- 2023
5. Rate of early hospital readmission amongst cirrhotic patients is high in Australia: experience from a single liver transplant centre
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Vaz, K, Tan, K, Chew, M, Crawford, J, Ma, R, Grace, J, Gow, P, Sinclair, M, Testro, A, Vaz, K, Tan, K, Chew, M, Crawford, J, Ma, R, Grace, J, Gow, P, Sinclair, M, and Testro, A
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BACKGROUND AND AIMS: The 30-day hospital readmission rate in cirrhotic patients has been demonstrated to be up to 40% in international studies, but is not well studied in Australia. The aim of the current study was to report on the rate and cause of 30-day hospital readmission from a single liver transplant referral centre, including a cost analysis of readmissions. METHODS: This was a retrospective study of consecutive cirrhotic patients admitted to a liver transplant centre in Victoria, Australia, between 1 January 2019 and 31 December 2019. Cases were identified through International Classification of Diseases, Tenth Revision, 10 coding for cirrhosis and its complications. Baseline demographic data, liver-related complications and unrelated extra-hepatic comorbidities, laboratory values and prognostic scores were collected from the electronic medical record. RESULTS: One hundred seventy-nine (63% men; median age at index admission, 59 years) patients who were admitted 427 times during the study period were included in the final analysis. The 30-day hospital readmission rate was 46%, with the majority of readmissions attributable to fluid overload (29%), miscellaneous reasons (27%) and infection (20%). One fifth of readmissions were considered preventable. History of variceal haemorrhage was found to be an independent predictor of 30-day hospital readmission. The annual cost of readmission is over AU$2.7 million and the median cost of hospital readmission was about AU$9000. CONCLUSIONS: The 30-day hospital readmission rate of 46% is higher than previously reported and almost half of cases were caused by either fluid overload or infection.
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- 2022
6. Early results of fixed-bearing unicompartmental knee replacement designed for the lateral compartment
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Asadollahi, S, Wilson, HA, Thomson, FR, Vaz, K, Middleton, R, Jenkins, C, Alvand, A, Bottomley, N, Dodd, CA, Price, AJ, Murray, DW, and Jackson, WF
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Adult ,Aged, 80 and over ,Male ,Reoperation ,Knee Joint ,Middle Aged ,Osteoarthritis, Knee ,Prosthesis Design ,Prosthesis Failure ,Treatment Outcome ,Humans ,Orthopedics and Sports Medicine ,Surgery ,Female ,Arthroplasty, Replacement, Knee ,Knee Prosthesis ,Aged - Abstract
Background Isolated lateral compartment knee arthritis is less prevalent than medial. While the reported results of medial unicompartmental knee replacement (UKR) have been good and comparable to total knee replacement, the results of lateral UKR have been mixed. We present the short-term results and survivorship of a fixed-bearing UKR designed specifically for the lateral compartment. Methods We report the result of 130 primary fixed-bearing lateral Oxford (FLO) UKRs (123 patients) performed between 2015 and 2019 with a minimum follow-up of 1 year. The indications for lateral UKR were: isolated lateral osteoarthritis (n = 122), post-trauma (n = 5) and osteonecrosis (n = 3). The mean age was 69.1 (± 11.6), mean BMI 28.4 (± 4.9), 66.9% female, 60% right-sided, and mean follow-up 3 (range 1–4.8 years, standard deviation ± 1) years. The primary outcome measure was the Oxford knee score (OKS). Survival analysis was performed with “revision for any reason”, “reoperation”, and “implant failure” as the endpoints. Results Six patients died from unrelated reasons. None of the implants failed. One required the addition of a medial UKR for medial arthritis. There were no other reoperations. At 4 years, the survival for implant failure was 100% and for both revision and all reoperations was 99.5% (95% CI 96.7–99.9%). At the last review, at a mean of 3 years, the mean Oxford knee score was 41. Conclusion The good survivorship and outcome scores suggest that UKR designed for the lateral compartment is an excellent alternative to total knee replacement in selected patients with isolated lateral tibiofemoral arthritis at short-term follow-up.
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- 2021
7. Inflammatory bowel disease: a statewide incidence and prevalence study in Tasmania, Australia
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BHATIA, R, STUDD, C, WILSON, J, VAZ, K, BELL, S, OTAHAL, P, and VENN, A
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- 2015
8. Community Approach Targeting Cirrhosis and Hepatocellular Carcinoma (CATCH): 4AGP, a new indirect biomarker-based algorithm that can predict risk of liver-related outcomes.
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Valaydon Z., Thompson A., Sood S., Lubel J., Kronborg I., Lewis D., Trezise K., Kemp W., Nicoll A., Bloom S., Ryan M., Freeman E., Vaz K., Wells R., Kodikara C., Sarraf B., Hirsch R., Satake S., Karunadasa H., Gardner S., Hartley I., Bell S., Gow P., Dev A., Roberts S., Valaydon Z., Thompson A., Sood S., Lubel J., Kronborg I., Lewis D., Trezise K., Kemp W., Nicoll A., Bloom S., Ryan M., Freeman E., Vaz K., Wells R., Kodikara C., Sarraf B., Hirsch R., Satake S., Karunadasa H., Gardner S., Hartley I., Bell S., Gow P., Dev A., and Roberts S.
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Background and Aim: Transient elastography with liver stiffness measurement (LSM) is known to correlate with liver fibrosis and liver-related outcomes. 4AGP is a new algorithm that uses indirect biomarkers to determine those who are at risk of elevated LSM (> 12.5 kPa). It is calculated using alpha-fetoprotein, albumin, aspartate aminotransferase, age, sex (gender), and platelet count. Although 4AGP correlates with elevated LSM in patients with chronic hepatitis C (CHC) virus infection, it is unknown whether it also predicts liver-related outcomes. We aimed to determine whether LSM or 4AGP, or other indirect biomarkers such as aspartate aminotransferase to platelet ratio index (APRI), Fibrosis-4 (FIB-4), or Forns index, can best predict liver-related outcomes in a cohort of patients with CHC. Method(s): The Community Approach Targeting Cirrhosis and Hepatocellular Carcinoma (CATCH) study is a prospective study that recruited patient with CHC. Baseline LSM and indirect biomarkers were assessed (all were before treatment), along with outcomes (hepatocellular carcinoma [HCC], decompensation, or liver-related death). Survival curves were analyzed using a log-rank test, along with receiver operator characteristic (ROC) curves and Cox proportional hazard ratios. Optimal cut-off points were calculated, accounting for sensitivity, specificity, false positives and negatives, as well as the area under the ROC curve (AUROC). Result(s): A total of 1049 patients with CHC were recruited between October 2014 and June 2018. Mean follow-up was 3.4 +/- 0.7 years, indicating 3631 patient-years. Patients' mean age was 45.1 years (19-82), and 31.3% were female. Seven patients developed HCC; the best predictors of HCC development were, in order, 4AGP, Forns index, FIB-4, LSM, and APRI (Fig. 1a). An LSM of 21.3 kPa was the optimal cut-off point for predicting HCC, with a sensitivity of 85.7%, specificity of 92.2%, and a hazard ratio (HR) of 30 (95% CI, 5.7-150). A 4AGP value of -2.81 had
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- 2021
9. Letter: the diagnostic and prognostic significance of liver histology in alcoholic hepatitis
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Vaz, K, McLean, C, Majeed, A, Little, R, Kemp, W, Roberts, S, Vaz, K, McLean, C, Majeed, A, Little, R, Kemp, W, and Roberts, S
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LINKED CONTENT This article is linked to Forrest et al and Forrest & Goldin papers. To view these articles, visit https://doi.org/10.1111/apt.16157 and https://doi.org/10.1111/apt.16559
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- 2021
10. Unpacking the challenge of gastric varices: A review on indication, timing and modality of therapy
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Vaz, K, Efthymiou, M, Vaughan, R, Testro, AG, Lew, H-B, Pu, LZCT, Chandran, S, Vaz, K, Efthymiou, M, Vaughan, R, Testro, AG, Lew, H-B, Pu, LZCT, and Chandran, S
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Upper gastrointestinal bleeding from oesophageal or gastric varices is an important medical condition in patients with portal hypertension. Despite the emergence of a number of novel endoscopic and radiologic therapies for oesophagogastric varices, controversy exists regarding the indication, timing and modality of therapy. The aim of this review is to provide a concise and practical evidence-based overview of these issues.
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- 2021
11. Clinical outcomes of patients with two small hepatocellular carcinomas
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Anh, DP, Vaz, K, Ardalan, ZS, Sinclair, M, Apostolov, R, Gardner, S, Majeed, A, Mishra, G, Kam, NM, Patwala, K, Kutaiba, N, Arachchi, N, Bell, S, Dev, AT, Lubel, JS, Nicoll, AJ, Sood, S, Kemp, W, Roberts, SK, Fink, M, Testro, AG, Angus, PW, Gow, PJ, Anh, DP, Vaz, K, Ardalan, ZS, Sinclair, M, Apostolov, R, Gardner, S, Majeed, A, Mishra, G, Kam, NM, Patwala, K, Kutaiba, N, Arachchi, N, Bell, S, Dev, AT, Lubel, JS, Nicoll, AJ, Sood, S, Kemp, W, Roberts, SK, Fink, M, Testro, AG, Angus, PW, and Gow, PJ
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BACKGROUND: Management of single small hepatocellular carcinoma (HCC) is straightforward with curative outcomes achieved by locoregional therapy or resection. Liver transplantation is often considered for multiple small or single large HCC. Management of two small HCC whether presenting synchronously or sequentially is less clear. AIM: To define the outcomes of patients presenting with two small HCC. METHODS: Retrospective review of HCC databases from multiple institutions of patients with either two synchronous or sequential HCC ≤ 3 cm between January 2000 and March 2018. Primary outcomes were overall survival (OS) and transplant-free survival (TFS). RESULTS: 104 patients were identified (male n = 89). Median age was 63 years (interquartile range 58-67.75) and the most common aetiology of liver disease was hepatitis C (40.4%). 59 (56.7%) had synchronous HCC and 45 (43.3%) had sequential. 36 patients died (34.6%) and 25 were transplanted (24.0%). 1, 3 and 5-year OS was 93.0%, 66.1% and 62.3% and 5-year post-transplant survival was 95.8%. 1, 3 and 5-year TFS was 82.1%, 45.85% and 37.8%. When synchronous and sequential groups were compared, OS (1,3 and 5 year synchronous 91.3%, 63.8%, 61.1%, sequential 95.3%, 69.5%, 64.6%, P = 0.41) was similar but TFS was higher in the sequential group (1,3 and 5 year synchronous 68.5%, 37.3% and 29.7%, sequential 93.2%, 56.6%, 48.5%, P = 0.02) though this difference did not remain during multivariate analysis. CONCLUSION: TFS in patients presenting with two HCC ≤ 3 cm is poor regardless of the timing of the second tumor. All patients presenting with two small HCC should be considered for transplantation.
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- 2021
12. Predictors of inpatient mortality in cirrhotics in the intensive care unit: a Tasmanian experience
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YEOH, S W, WILLS, K, STOKLOSA, T, VAZ, K, SAMEDANI, S, BHULLAR, M, and BHATIA, R
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- 2014
13. P483 Infliximab but not adalimumab drug levels predict faecal calprotectin response in Inflammatory Bowel Disease patients on dose-intensified anti-TNF therapy
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Noack, S, primary, Little, R, additional, Vaz, K, additional, Ward, M, additional, and Sparrow, M, additional
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- 2021
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14. Gastric adenocarcinoma causing biliary obstruction without ductal dilatation: a case report
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Vaz, K, Luber, RP, McLean, C, Gerstenmaier, JF, Roberts, SK, Vaz, K, Luber, RP, McLean, C, Gerstenmaier, JF, and Roberts, SK
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INTRODUCTION: Gastric adenocarcinoma is a known complication of partial gastrectomy. Jaundice from gastric adenocarcinoma usually occurs in the setting of hepatic nodal or parenchymal metastasis. This case demonstrates an unusual level of biliary obstruction from gastric adenocarcinoma. CASE PRESENTATION: An 84-year-old Caucasian man was diagnosed as having a new gastric adenocarcinoma at the level of the gastroenteric anastomosis of a prior Billroth II gastrectomy after presenting with painless jaundice. He had a non-dilated biliary tree on radiographic imaging despite evidence of large bile duct obstruction on liver biopsy. The obstruction was managed with endoscopic wire-guided stenting of the malignant tumor. CONCLUSIONS: The unusual finding of a non-dilated biliary tree in the face of obstructive jaundice is likely to have resulted from the unusual post-surgical anatomy and hence distal level of obstruction. Endoscopic duodenal stenting is a novel method of managing obstructive jaundice in gastric adenocarcinoma.
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- 2019
15. Regional Ulnar Nerve Strain Following Decompression and Anterior Subcutaneous Transposition in Patients With Cubital Tunnel Syndrome
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Foran, I, Vaz, K, Sikora-Klak, J, Ward, SR, Hentzen, ER, and Shah, SB
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musculoskeletal diseases ,Range of Motion ,Decompression ,Reoperation ,Male ,Clinical Sciences ,Cubital Tunnel Syndrome ,Risk Assessment ,Neurosurgical Procedures ,Sampling Studies ,biomechanics ,Surgical ,Humans ,Nerve Transfer ,Ulnar Nerve ,Pain Measurement ,Retrospective Studies ,Aged ,anterior transposition ,Middle Aged ,musculoskeletal system ,body regions ,Treatment Outcome ,Orthopedics ,peripheral nerve ,Sprains and Strains ,Female ,Articular ,Follow-Up Studies - Abstract
PurposeSimple decompression and anterior subcutaneous transposition are effective surgical interventions for cubital tunnel syndrome and yield similarly favorable outcomes. However, a substantial proportion of patients demonstrate unsatisfactory outcomes for reasons that remain unclear. We compared effects of decompression and transposition on regional ulnar nerve strain to better understand the biomechanical impacts of each strategy.MethodsPatients diagnosed with cubital tunnel syndrome and scheduled for anterior subcutaneous transposition surgery were enrolled. Simple decompression, circumferential decompression, and anterior transposition of the ulnar nerve were performed during the course of the transposition procedure. Regional ulnar nerve strain around the elbow was measured for each surgical intervention based on 4 wrist and elbow joint configurations.ResultsWith elbow extension at 180°, both circumferential decompression and anterior transposition resulted in approximately 68% higher nerve strains than simple decompression. Conversely, with elbow flexion, simple decompression resulted in higher average strains than anterior transposition. Limited regional differences in strain were observed for any surgical intervention with elbow extension. However, with elbow flexion, strains were higher in distal and central regions compared with the proximal region within all surgical groups, and proximal region strain was higher after simple decompression compared with anterior transposition.ConclusionsAs predicted by the altered anatomic course, anterior transposition results in lower ulnar nerve strains than simple decompression during elbow flexion and higher nerve strains during elbow extension. Irrespective of anatomic course, circumferential release of paraneurial tissues may also influence nerve strain. Nerve strain varies regionally and is influenced by surgery and joint configuration.Clinical relevanceOur data provide insight into how surgery resolves and redistributes traction on the ulnar nerve. These findings may help inform which surgical procedure to perform for a specific patient, guide rehabilitation protocols, and suggest regions of anatomic concern during index and revision surgery.
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- 2016
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16. O Lócus de Atuação do Professor de Educação Especial como Expressão da Política de Perspectiva Inclusiva no Brasil
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Vaz, K., primary
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- 2015
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17. A pilot study comparing outcomes and experiences with three-dimensional and high-resolution anorectal manometry in children with functional constipation.
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Baaleman, D. F., Vriesman, M. H., Lu, P. L., Benninga, M. A., Bali, N., Vaz, K. H., Yacob, D., Di Lorenzo, C., and Koppen, I. J. N.
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- 2022
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18. Error reducing techniques for the scattering parameter characterization of differential networks using a two-port network analyzer.
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Vaz, K., Ka Mun Ho, and Caggiano, M.
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- 2005
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19. Knowledge, awareness and compliance with universal precautions among health care workers at the University Hospital of the West Indies, Jamaica.
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Vaz K, McGrowder D, Alexander-Lindo R, Gordon L, Brown P, and Irving R
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Background: Universal precautions are not well understood or implemented by health care practitioners, though crucial in the prevention and transmission of blood-borne pathogens like HIV. Objective: To assess knowledge, awareness and compliance of universal precautions among health care workers at the University Hospital of the West Indies, Jamaica. Method: A cross-sectional survey was conducted in September and October 2007. A 28- item self-administered questionnaire was provided to 200 health care workers including medical doctors, medical technologists, nurses and porters to assess their knowledge, awareness and practice towards universal precautions. Results: Almost two-thirds (64.0%) of the respondents were very knowledgeable of universal precautions with significantly more females (75.4%) than males (42.9%) (p<0.0001). More nurses (90.0%), medical doctors (88.0%) and medical technologists (70%) were very knowledgeable of universal precautions (p<0.0001). More respondents (92.9%) who were employed in the health sector for 16 years and over reported high levels of awareness of universal precautions than those who were employed for less than five years (p<0.0001). 28.6% of males and only 6.2% of females reported that they do not use protective gear. More nurses reported frequent use of protective equipment followed by medical technologists and medical doctors (p<0.0001). Conclusions: There was adequate knowledge and a fair level of awareness among medical doctors, medical technologists, and nurses towards universal precautions. [ABSTRACT FROM AUTHOR]
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- 2010
20. A woman in the grip of the archetype of the sexual priestess
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Vaz, K. M.
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- 2001
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21. Avaliação da triangulação da anastomose término-terminal de fragmento de mucosa bucal na reconstrução uretral: estudo experimental no cão
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Silva Fernando Ferro da, Paulo Neusa Margarida, Brito George Alves de, Vaz Karla Fernanda Guimarães, Freitas José de Sousa, Porto Simone Moraes, Rôlla Adriana Braga Siqueira, and Silva Luciano Schneider da
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Uretra ,Mucosa bucal ,Anastomose uretral ,Estreitamento uretral ,Surgery ,RD1-811 - Abstract
O uso da mucosa bucal para tratar a estenose uretral tem sido considerado um excelente método alternativo para substituir o tecido uretral. OBJETIVO: Investigar os resultados da realização da triangulação da anastomose término-terminal de fragmento de mucosa bucal na reconstrução uretral. MÉTODOS: Foram utilizados 12 cães entre 13 e 17 Kg, sem raça definida, aparentemente sadios. Após anestesia, introduziu-se sonda na uretra dos animais que foi mantida durante todo ato operatório. Inicialmente procedeu-se a ressecção de um fragmento de mucosa bucal do lábio superior e imerso em solução salina com cloranfenicol aquoso. A seguir procedeu-se a exposição da uretra peniana e ressecou-se um segmento de dois centrímetros. Foi realizada a triangulação da anastomose término-terminal do fragmento de mucosa bucal na reconstrução uretral. RESULTADOS: Após 60 dias observou-se a ocorrência de estenose em 25% dos animais. Foram observadas fístulas uretro-cutâneas e extravasamento de contraste no local das anastomoses. CONCLUSÃO: A triangulação da anastomose término-terminal de fragmento de mucosa bucal na reconstrução uretral não evita a ocorrência de estenose.
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- 2002
22. Measurement technique for the extraction of differential S-parameters from single-ended S-parameters
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Vaz, K., primary and Caggiano, M., additional
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23. A prospective, randomized, double-blinded single-site control study comparing blood loss prevention of tranexamic acid (TXA) to epsilon aminocaproic acid (EACA) for corrective spinal surgery
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Vaz Kenneth M, Errico Thomas J, Verma Kushagra, and Lonner Baron S
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Surgery ,RD1-811 - Abstract
Abstract Background Multilevel spinal fusion surgery has typically been associated with significant blood loss. To limit both the need for transfusions and co-morbidities associated with blood loss, the use of anti-fibrinolytic agents has been proposed. While there is some literature comparing the effectiveness of tranexamic acid (TXA) to epsilon aminocaproic acid (EACA) in cardiac procedures, there is currently no literature directly comparing TXA to EACA in orthopedic surgery. Methods/Design Here we propose a prospective, randomized, double-blinded control study evaluating the effects of TXA, EACA, and placebo for treatment of adolescent idiopathic scoliosis (AIS), neuromuscular scoliosis (NMS), and adult deformity (AD) via corrective spinal surgery. Efficacy will be determined by intraoperative and postoperative blood loss. Other clinical outcomes that will be compared include transfusion rates, preoperative and postoperative hemodynamic values, and length of hospital stay after the procedure. Discussion The primary goal of the study is to determine perioperative blood loss as a measure of the efficacy of TXA, EACA, and placebo. Based on current literature and the mechanism by which the medications act, we hypothesize that TXA will be more effective at reducing blood loss than EACA or placebo and result in improved patient outcomes. Trial Registration ClinicalTrials.gov ID: NCT00958581
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- 2010
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24. Scattering parameter characterization of differential four-port networks using a two-port vector network analyzer.
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Ka Mun Ho, Vaz, K., and Caggiano, M.
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- 2005
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25. Measurement technique for the extraction of differential S-parameters from single-ended S-parameters.
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Vaz, K. and Caggiano, M.
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- 2004
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26. Anorectal physiology and colonic motility in children with a history of tethered cord syndrome.
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van der Zande JMJ, Srinivas S, Koppen IJN, Benninga MA, Wood RJ, Sanchez RE, Puri NB, Vaz K, Yacob D, Di Lorenzo C, and Lu PL
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- Humans, Female, Retrospective Studies, Male, Child, Child, Preschool, Case-Control Studies, Manometry methods, Constipation physiopathology, Constipation etiology, Neural Tube Defects physiopathology, Gastrointestinal Motility physiology, Rectum physiopathology, Colon physiopathology, Anal Canal physiopathology
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Objectives: The understanding of the impact of tethered cord syndrome (TCS) on the physiology of the colorectal area is limited. Our aim was to describe anorectal and colonic motility in children with TCS and compare the findings to those of children with functional constipation (FC)., Methods: We conducted a retrospective review of children with TCS who had an anorectal manometry (ARM) performed at our institution from January 2011 to September 2023. We recorded demographics, medical and surgical history, clinical symptoms, and treatment at time of ARM, ARM findings (resting pressure, push maneuver, rectal sensation, rectoanal inhibitory reflex [RAIR], and RAIR duration), and the final interpretation of colonic manometry (CM) if performed. We identified age and sex-matched control groups of children with FC., Results: We included 24 children with TCS (50% female) who had ARM testing (median age at ARM 6.0 years, interquartile range 4.0-11.8 years). All children had constipation at time of ARM. Nineteen children had detethering surgery before ARM was performed. No significant differences in ARM parameters were found between children who had detethering surgery before ARM and children with FC. Among the 24 children, 14 also had a CM performed (13/14 after detethering surgery). No significant differences in colonic motility were found between children with a history of TCS and children with FC., Conclusions: Anorectal physiology and colonic motility are similar between children with a history of TCS and children with FC, suggesting that the underlying pathophysiology of defecatory disorders in children with and without history of TCS is similar., (© 2024 The Author(s). Journal of Pediatric Gastroenterology and Nutrition published by Wiley Periodicals LLC on behalf of European Society for Pediatric Gastroenterology, Hepatology, and Nutrition and North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition.)
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- 2024
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27. Validation of serum non-invasive tests of liver fibrosis as prognostic markers of clinical outcomes in people with fatty liver disease in Australia.
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Vaz K, Kemp W, Majeed A, Lubel J, Magliano DJ, Glenister KM, Bourke L, Simmons D, and Roberts SK
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Background and Aim: The validity of non-invasive tests (NITs) of liver fibrosis for the prediction of liver and mortality outcomes in an Australian cohort is unknown. We aimed to verify the utility of available NITs to predict overall and cause-specific mortality and major adverse liver outcome (MALO)., Methods: This was an analysis from the Crossroads 1 clinic sub-study of a randomly sampled adult cohort from regional Australia between 2001 and 2003. Baseline variables included demographic details, anthropometry, health and lifestyle data, and laboratory tests. Non-alcoholic fatty liver disease (NAFLD) and metabolic-(dysfunction) associated fatty liver disease (MAFLD) were defined by fatty liver index ≥ 60 and other accepted criteria. Outcomes were defined by the International Statistical Classification of Diseases and Related Health Problems 10th Revision codes for linked hospitalization and death registry data. Available serum-based NITs were analyzed as predictors of overall, cardiovascular disease-related, and cancer-related mortality and MALO in those with fatty liver disease (FLD)., Results: In total, 1324 and 1444 participants were included for NAFLD and MAFLD analysis (prevalence 35.4% and 40.7%, respectively). There were 298 deaths (89 cardiovascular disease-related and 98 cancer-related) and 24 MALO over a median 19.7 years of follow-up time. In both forms of FLD, fibrosis-4 index, Steatosis-Associated Fibrosis Estimator score, and Forns fibrosis score consistently had the highest area under the receiver operating characteristic curve (AUROC) for overall and cause-specific mortality, with AUROC > 0.70 for each outcome. However, all had poor discriminatory ability for determining MALO in each FLD., Conclusions: Several liver fibrosis NITs perform similarly reasonably well in predicting the risk of mortality outcomes in those with FLD but are poorly discriminatory for MALO prediction., (© 2024 Journal of Gastroenterology and Hepatology Foundation and John Wiley & Sons Australia, Ltd.)
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- 2024
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28. Delay in diagnosis is associated with decreased treatment effectiveness in children with rumination syndrome.
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Jia MR, Lu PL, Khoo JS, Sabella J, Yang DM, Puri NB, Vaz K, Yacob D, Di Lorenzo C, and Kroon Van Diest AM
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- Humans, Female, Male, Child, Adolescent, Treatment Outcome, Retrospective Studies, Child, Preschool, Surveys and Questionnaires, Time Factors, Delayed Diagnosis statistics & numerical data, Rumination Syndrome diagnosis, Rumination Syndrome therapy
- Abstract
Objectives: Rumination syndrome (RS) is challenging to diagnose, which can lead to diagnostic delays. Our objective was to evaluate the length of time from RS symptom onset to diagnosis in patients referred to our institution and to examine whether this duration predicts treatment outcomes., Methods: We conducted a review of patients with RS evaluated at our institution. Data were collected from chart review and patient/family reported questionnaires. We evaluated the time from symptom onset to diagnosis over time and whether it was associated with symptom resolution., Results: We included 247 patients with RS (60% female, median age of 14 years, interquartile range [IQR]: 9-16 years). The median age at symptom onset was 11 years (IQR: 5-14 years) and median age at diagnosis was 13 years (IQR: 9-15 years) for a median duration of 1 year (IQR: 0-3 years) between symptom onset and diagnosis. Length of time between symptom onset and diagnosis did not change significantly at our institution from 2016 to 2022. Among the 164 children with outcome data, 47 (29%) met criteria for symptom resolution after treatment. A longer time to diagnosis was associated with a lower likelihood of symptom resolution after treatment (p = 0.01)., Conclusion: In our experience, the time to RS diagnosis after symptom onset is shorter than previously described. A longer delay in diagnosis is associated with lower likelihood of symptom resolution after treatment, emphasizing the importance of a prompt recognition of rumination symptoms and a timely diagnosis., (© 2024 European Society for Pediatric Gastroenterology, Hepatology, and Nutrition and North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition.)
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- 2024
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29. Significance of retrograde flow with antegrade continence enemas in children with fecal incontinence and constipation.
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Pearlstein H, Wang L, Thompson BP, Wood RJ, Levitt MA, Bali N, Vaz K, Yacob D, Di Lorenzo C, and Lu PL
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- Humans, Male, Female, Child, Child, Preschool, Retrospective Studies, Adolescent, Fluoroscopy methods, Contrast Media administration & dosage, Colon, Appendix, Fecal Incontinence therapy, Fecal Incontinence etiology, Constipation therapy, Constipation etiology, Enema methods, Cecostomy methods
- Abstract
Background: For children with constipation and fecal incontinence treated with antegrade continence enemas (ACE), a fluoroscopic study with contrast administered via appendicostomy/cecostomy can define the anatomy of the colon and simulate the flush to investigate associated symptoms or inadequate response. These studies can at times show retrograde flow into the small intestine. Our objective was to investigate the significance of this finding., Methods: We reviewed studies at our institution with contrast administered via appendicostomy/cecostomy in children treated with ACE, identifying those demonstrating retrograde flow of contrast. We recorded demographics, medical history, interventions, and outcomes., Results: We identified 162 studies (52% male, median age 10.7 years) with contrast via appendicostomy (76%) or cecostomy (24%). Diagnoses included anorectal malformation (38%), spinal cord anomaly (26%), functional constipation (24%), colonic dysmotility (18%), and Hirschsprung disease (12%). Fifty-nine (36%) studies showed retrograde flow: 28/59 children (48%) were not responding adequately and 21/59 (36%) had symptoms with ACE. Children with retrograde flow were more likely to have symptoms with ACE than those without (36% vs. 15%, p < 0.01). Fourteen children underwent interventions for this finding, including administering flushes more distally (4/8 responded), changing positioning of the child during flush administration, (1/2 responded), and slowing administration (1/1 responded). Retrograde flow was associated with younger age (p < 0.01), not sex or underlying diagnosis., Conclusion: Identifying retrograde flow during studies with contrast administered via appendicostomy/cecostomy can be useful for children with a poor response or symptoms associated with ACE, as adjustments to the mechanics of the flush can alleviate those symptoms., Level of Evidence: Prognostic study, Level III., (© 2024 European Society for Pediatric Gastroenterology, Hepatology, and Nutrition and North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition.)
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- 2024
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30. Sacral nerve stimulation leads to long-term improvement in fecal incontinence and quality of life for children with functional and organic defecation disorders.
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Park CK, Wang L, Koppen IJK, Alpert SA, Diefenbach KA, Wood RJ, Bali N, Vaz K, Yacob D, Di Lorenzo C, and Lu PL
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- Humans, Female, Child, Adolescent, Male, Prospective Studies, Young Adult, Treatment Outcome, Lumbosacral Plexus, Defecation physiology, Follow-Up Studies, Fecal Incontinence therapy, Fecal Incontinence physiopathology, Quality of Life, Electric Stimulation Therapy methods, Constipation therapy, Constipation physiopathology
- Abstract
Background: Our objective was to evaluate long-term outcomes of sacral nerve stimulation (SNS) for children with functional and organic defecation disorders., Methods: We performed a prospective study of children <21 years of age who started SNS treatment between 2012 and 2018. We recorded demographics, medical history, and diagnostic testing. We obtained measures of symptom severity and quality of life at baseline and follow up at 1, 6, 12, 24, 36, 48, and ≥60 months. Successful response was defined as bowel movements >2 times/week and fecal incontinence (FI) <1 time/week. Families were contacted to administer the Glasgow Children's Benefit Inventory and to evaluate patient satisfaction., Key Results: We included 65 patients (59% female, median age at SNS 14 years, range 9-21) with median follow-up of 32 months. Thirty patients had functional constipation (FC), 15 had non-retentive FI (NRFI), and 16 had an anorectal malformation (ARM). The percentage with FI <1 time/week improved from 30% at baseline to 64% at 1 year (p < 0.001) and 77% at most recent follow-up (p < 0.001). Patients with FC, NRFI, and ARM had sustained improvement in FI (p = 0.02, p < 0.001, p = 0.02). Patients also reported fewer hard stools (p = 0.001). Bowel movement frequency did not improve after SNS. At most recent follow-up, 77% of patients with a functional disorder and 50% with an organic disorder had responded (p = 0.03). Nearly all families reported benefit., Conclusions and Inferences: SNS led to sustained improvement in FI regardless of underlying etiology, but children with functional disorders were more likely to respond than those with organic disorders., (© 2024 John Wiley & Sons Ltd.)
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- 2024
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31. Long-Term Continuous Terlipressin Infusion Improves Cardiac Reserve in Patients With Decompensated Cirrhosis.
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Terbah R, Koshy AN, Majumdar A, Vaz K, Testro A, and Sinclair M
- Abstract
Background and Aims: Cardiac dysfunction is a key factor in the pathogenesis of hepatorenal syndrome, for which terlipressin is the recommended first-line treatment. This study investigates whether long-term terlipressin can ameliorate the subclinical cardiac dysfunction observed in decompensated cirrhosis., Methods: Twenty-two patients with decompensated cirrhosis and ascites enrolled in a prospective study of home continuous terlipressin infusion were included. Cardiac function was assessed using dobutamine stress echocardiogram before and after 12 weeks of terlipressin. The primary outcome was the impact of terlipressin on cardiac reserve, the change in cardiac output (CO) in response to stress., Results: The median age was 61 years (interquartile range, 56-64 years), the median Model for End-Stage Liver Disease score was 15 (interquartile range, 12.3-17.0), and 72.7% were male. The increase in CO in response to low-dose dobutamine was significantly higher following terlipressin (↑4.0 L/min [↑57.8%]) as compared with baseline (↑1.8 L/min [21.3%]) (P = .0001). The proportion of patients with impaired cardiac reserve (defined by ΔCO <25% after low-dose dobutamine) reduced from 81.8% at baseline to 40.9% after terlipressin, (P = .02), driven primarily by improvement in inotropic function. Resting CO decreased significantly after terlipressin from 8.9 ± 2.2 L/min to 7.2 ± 1.8 L/min (normal range 5-6 L/min) (P < .001), due to a decrease in stroke volume from 108 to 86 mL/beat (P = .006)., Conclusions: Long-term continuous terlipressin infusion resulted in a significant increase in cardiac reserve and attenuation of the hyperdynamic state usually observed in decompensated cirrhosis. These data provide important mechanistic insight into the pathogenesis and reversibility of cardiac dysfunction in cirrhosis. Future studies are required to evaluate whether long-term terlipressin can prevent hepatic decompensating events such as hepatorenal syndrome in high-risk individuals. Australian New Zealand Clinical Trials Registry, Number: ACTRN12619000891123., (Copyright © 2024 AGA Institute. Published by Elsevier Inc. All rights reserved.)
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- 2024
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32. Current practice in the care of children with functional constipation: What is the hold up?
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van der Zande JMJ, Koppen IJN, Yacob D, Sanchez RE, Puri NB, Vaz K, Di Lorenzo C, Benninga MA, and Lu PL
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- Humans, Child, Laxatives therapeutic use, Surveys and Questionnaires, Manometry statistics & numerical data, Female, Male, Gastroenterology statistics & numerical data, Constipation therapy, Constipation diagnosis, Practice Patterns, Physicians' statistics & numerical data
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Objectives: For children with intractable functional constipation (FC), there are no evidence-based guidelines for subsequent evaluation and treatment. Our objective was to assess the practice patterns of a large, international cohort of pediatric gastroenterologists., Methods: We administered a survey to physicians who attended the 2nd World Congress of Pediatric Neurogastroenterology and Motility held in Columbus, Ohio (USA) in September 2023. The survey included 29 questions on diagnostic testing, nonpharmacological and pharmacological treatment, and surgical options for children with intractable FC., Results: Ninety physicians from 18 countries completed the survey. For children with intractable FC, anorectal manometry was the most commonly used diagnostic test. North American responders were more likely than Europeans to use stimulant laxatives (97% vs. 77%, p = 0.032), prosecretory medications (69% vs. 8%, p < 0.001), and antegrade continence enemas (ACE; 83% vs. 46%, p = 0.009) for management. Europeans were more likely than North Americans to require colonic transit testing before surgery (85% vs. 30%, p < 0.001). We found major differences in management practices between Americans and the rest of the world, including use of prosecretory drugs (73% vs. 7%, p < 0.001), anal botulinum toxin injections (81% vs. 58%, p = 0.018), ACE (81% vs. 58% p = 0.018), diverting ileostomies (56% vs. 26%, p = 0.006), and colonic resections (42% vs. 16%, p = 0.012). No differences were found when respondents were compared by years of experience., Conclusions: Practice patterns in the evaluation and treatment of children with intractable FC differ widely among pediatric gastroenterologists from around the world. A clinical guideline regarding diagnostic testing and surgical decision-making is needed., (© 2024 The Author(s). Journal of Pediatric Gastroenterology and Nutrition published by Wiley Periodicals LLC on behalf of European Society for Pediatric Gastroenterology, Hepatology, and Nutrition and North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition.)
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- 2024
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33. NAFLD and MAFLD independently increase the risk of major adverse cardiovascular events (MACE): a 20-year longitudinal follow-up study from regional Australia.
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Vaz K, Kemp W, Majeed A, Lubel J, Magliano DJ, Glenister KM, Bourke L, Simmons D, and Roberts SK
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- Humans, Male, Female, Middle Aged, Longitudinal Studies, Australia epidemiology, Follow-Up Studies, Adult, Risk Factors, Aged, Fatty Liver epidemiology, Fatty Liver complications, Non-alcoholic Fatty Liver Disease epidemiology, Non-alcoholic Fatty Liver Disease complications, Cardiovascular Diseases epidemiology
- Abstract
Background and Aims: The association between fatty liver disease (FLD) and cardiovascular disease (CVD) in an Australian context has yet to be defined. The primary aim of this study was to investigate the association between FLD and 3-point major adverse cardiovascular events (MACE)., Methods: This was a longitudinal follow-up study of a randomly sampled adult cohort from regional Australia between 2001 and 2003. Baseline covariates included demographic details, anthropometry, health and lifestyle data, and laboratory tests. Non-alcoholic fatty liver disease (NAFLD) and metabolic-(dysfunction) associated fatty liver disease (MAFLD) were diagnosed in participants with fatty liver index (FLI) ≥ 60 and meeting other standard criteria. ICD-10 codes were used to define clinical outcomes linked to hospitalisations. Three-point MACE defined as non-fatal myocardial infarction (MI) and cerebrovascular accident (CVA) and CVD death., Results: In total, 1324 and 1444 participants met inclusion criteria for NAFLD and MAFLD analysis, respectively. Over 23,577 and 25,469 person-years follow-up, NAFLD and MAFLD were independent predictors for 3-point MACE, adjusting for demographic covariates and known cardiometabolic risk factors, whilst considering non-CVD death as a competing event (NAFLD: sub-hazard ratio [sHR] 1.56, 95% confidence interval [CI 1.12-2.19]; MAFLD: sHR 1.51, 95% CI 1.11-2.06). The results held true on several sensitivity analyses., Conclusions: Both forms of FLD increase the risk for CVD independent of traditional cardiometabolic risk factors., (© 2024. Crown.)
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- 2024
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34. Drug-induced liver injury from selective androgen receptor modulators, anabolic-androgenic steroids and bodybuilding supplements in Australia.
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Nash E, Nicoll A, Batt N, George J, Perananthan V, Prince D, Wallace M, Gow P, Vaz K, Chitturi S, Flores JE, Braund A, Bonnichsen M, Riordan S, Humphris J, Duong T, McKenzie C, Liu K, and Strasser SI
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- Humans, Male, Adult, Female, Anabolic Androgenic Steroids, Retrospective Studies, Australia epidemiology, Dietary Supplements adverse effects, Steroids, Receptors, Androgen, Chemical and Drug Induced Liver Injury diagnosis, Chemical and Drug Induced Liver Injury etiology
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Background: Reports of DILI due to herbal and dietary supplements have been increasing over time., Aims: To characterise clinical, laboratory and histopathological phenotypes and outcomes of drug-induced liver injury (DILI) due to anabolic-androgenic steroids (AAS), selective androgen receptor modulators (SARMs), and bodybuilding supplements (BBS) in Australia., Methods: Retrospective case series. Patients presented to nine Australian tertiary hospitals, 2017-2023. DILI was defined biochemically and patients were included if their treating physician attributed DILI to preceding use of AAS, SARMs or BBS. Primary endpoint was time to normalisation of liver biochemistry. Secondary endpoints were hospitalisation for investigation or management of DILI, death attributable to liver injury, and liver transplantation., Results: Twenty-three cases of DILI were identified, involving 40 drugs: 18 AAS, 14 SARMs and eight BBS. Patients were predominantly male (22/23), with median age 30 years (IQR 26-42). Most were symptomatic (21/23). Median latency of onset was 58 days (IQR 28-112 days) from drug commencement. Most patients (17/23) were admitted to hospital. Based on updated Roussel Uclaf Causality Assessment Method, DILI was possible in 17/23, probable in 2/23 and unlikely in 4/23. Median time to normalisation of liver biochemistry was 175 days (IQR 70-292 days) from presentation. Three (3/23) were treated with corticosteroids, 14/23 were treated for itch, and one (1/23) underwent liver transplantation. There were no deaths., Conclusions: The prognosis of DILI from AAS, SARMs and BBS is good although liver transplantation may rarely be required. A detailed drug history is important in uncovering DILI due to these supplements., (© 2024 The Authors. Alimentary Pharmacology & Therapeutics published by John Wiley & Sons Ltd.)
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- 2024
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35. Multidisciplinary management of people with spina bifida across the lifespan.
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Koch VH, Lopes M, Furusawa E, Vaz K, and Barroso U
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- Adult, Pregnancy, Female, Humans, Longevity, Quality of Life, Spinal Dysraphism complications, Spinal Dysraphism therapy, Urinary Incontinence, Hydrocephalus complications
- Abstract
The average worldwide prevalence of neural tube defects (NTDs) is 1.0 per 1000 births. Its development is multifactorial due to genetic and non-genetic factors. Spina bifida (SB) is one of main representatives of NTD. The spinal cord lesion level is the main determinant of the level of paralysis, numbness, and difficulties with bladder/bowel functions. Myelomeningocele prenatal repair reduces hydrocephalus and hindbrain herniation and improves motor function. The severity of hydrocephalus is associated with poorer neurodevelopmental outcomes whether operated on prenatally or after birth. People with SB tend to have a lower IQ and cognitive difficulties. Early diagnosis, proactivity, and lifelong multidisciplinary follow-up are key protective issues. Invasive urological interventions should be considered in selected patients after failure of conservative treatment. Transition to adult care should be well planned as it is challenging. Health literacy is directly associated with success at transition. Sexuality and fertility should be addressed before/during puberty. Overall, the rates of fecal and urinary continence and skin breakdown increase with age, whereas the ability to ambulate declines with age. Bowel and urinary incontinence are independent predictors of lower health-related quality of life (HRQoL) in adults with SB. Bowel incontinence has negative impact on HRQoL regardless of frequency or amount. Long-term caregiver support should be offered at diagnosis. Survival at a mean of 50 years is poor, at 32%, due to central nervous system deaths, cancer, urological disease, and sepsis. Challenges to implementation of recommended practices exist, especially in low and middle-income countries., (© 2023. The Author(s), under exclusive licence to International Pediatric Nephrology Association.)
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- 2024
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36. Early childhood-onset rumination syndrome is clinically distinct from adolescent-onset rumination syndrome.
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Yang DM, Sabella J, Kroon Van Diest A, Bali N, Vaz K, Yacob D, Di Lorenzo C, and Lu PL
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- Child, Humans, Male, Child, Preschool, Female, Adolescent, Cohort Studies, Age of Onset, Weight Loss, Vomiting etiology, Rumination Syndrome
- Abstract
Objectives: Rumination syndrome (RS) beginning in early childhood or infancy is understudied and challenging to treat. Our objective is to compare the characteristics and outcomes of early-onset (EO) and adolescent-onset (AO) patients with RS., Methods: We conducted an ambidirectional cohort study of children diagnosed with RS at our institution. Patients were included in two groups: EO (RS symptom onset ≤5 years and diagnosis ≤12 years) and AO (onset >12 years). Patient characteristics, severity, and outcomes were compared between the groups., Results: We included 49 EO and 52 AO RS patients. The median ages of symptom onset and diagnosis in EO were 3.5 and 6 years, respectively; AO, 14.5 and 15 years. EO RS had a slight male predominance while AO was predominantly female (p = 0.016). EO patients were more likely to have developmental delay (24% vs. 8%, p = 0.029) and less likely to have depression (0% vs. 23%, p < 0.001) or anxiety (14% vs. 40%, p = 0.004). At baseline, EO RS was less severe than AO RS: EO RS had greater regurgitation frequency (p < 0.001) but lower vomiting frequency (p = 0.001), resulting in less meal skipping (p < 0.001), reliance on tube feeding or parenteral nutrition (p < 0.001), and weight loss (p = 0.035). EO RS symptoms improved over time: at follow-up, patients had lower regurgitation (p < 0.001) and vomiting frequency (p < 0.001) compared to baseline., Conclusion: EO RS is clinically distinct from AO RS, with differences in sex distribution, comorbid conditions, and severity of initial presentation. The pathogenesis and natural history of EO RS may be distinct from that of AO RS., (© 2024 European Society for Pediatric Gastroenterology, Hepatology, and Nutrition and North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition.)
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- 2024
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37. Steatotic liver disease in rural and regional Victoria, according to the NAFLD and newer diagnostic criteria: retrospective cohort analyses of 2001-03 and 2016-18 data.
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Vaz K, Kemp WW, Majeed A, Lubel J, Magliano D, Glenister K, Bourke L, Simmons D, and Roberts SK
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- Humans, Retrospective Studies, Liver, Cohort Studies, Non-alcoholic Fatty Liver Disease diagnosis, Non-alcoholic Fatty Liver Disease epidemiology
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- 2024
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38. Current understanding and future perspectives on the impact of changing NAFLD to MAFLD on global epidemiology and clinical outcomes.
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Vaz K, Clayton-Chubb D, Majeed A, Lubel J, Simmons D, Kemp W, and Roberts SK
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- Humans, Non-alcoholic Fatty Liver Disease epidemiology
- Abstract
Introduction: For the first time in nearly half a century, fatty liver disease has undergone a change in name and definition, from the exclusive term, non-alcoholic fatty liver disease (NAFLD), to the inclusion-based, metabolic-associated fatty liver disease (MAFLD). This has led investigators across the globe to evaluate the impact the nomenclature change has had on the epidemiology and natural history of the disease., Methods: This systematic review provides a comprehensive overview on how the shift in name and diagnostic criteria has influenced point prevalence in different geographic regions, as well as morbidity and mortality risk, whilst highlighting gaps in the literature that need to be addressed., Conclusions: MAFLD prevalence is higher than NAFLD prevalence, carries a higher risk of overall mortality, with greater granularity in risk-stratification amongst MAFLD subtypes., (© 2023. Crown.)
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- 2023
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39. A risk prediction model for hepatocellular carcinoma after hepatitis B surface antigen seroclearance: Has the correct patient cohort been targeted?
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Carlson S, Vaz K, and Peterson A
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- Humans, Hepatitis B Surface Antigens, Hepatitis B virus genetics, DNA, Viral, Hepatitis B e Antigens, Carcinoma, Hepatocellular pathology, Liver Neoplasms pathology, Hepatitis B, Chronic, Hepatitis B complications
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- 2023
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40. Non-alcoholic fatty liver disease prevalence in Australia has risen over 15 years in conjunction with increased prevalence of obesity and reduction in healthy lifestyle.
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Vaz K, Kemp W, Majeed A, Lubel J, Magliano DJ, Glenister KM, Bourke L, Simmons D, and Roberts SK
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- Male, Humans, Female, Adolescent, Risk Factors, Prevalence, Cross-Sectional Studies, Obesity epidemiology, Obesity complications, Healthy Lifestyle, Body Mass Index, Non-alcoholic Fatty Liver Disease epidemiology, Non-alcoholic Fatty Liver Disease prevention & control, Non-alcoholic Fatty Liver Disease complications
- Abstract
Background and Aim: Non-alcoholic fatty liver disease (NAFLD) is the most prevalent liver condition globally. The aim of this study was to evaluate the change in age- and sex-standardized prevalence of NAFLD in regional Victoria over a 15-year period and explore the underlying factors associated with differences over time., Methods: Repeated comparative cross-sectional studies in four towns in regional Victoria, Australia. Individuals randomly selected from households from residential address lists from local government organizations in 2001-2003 (CrossRoads I [CR1]) and 2016-2018 (CrossRoads II [CR2]) with 1040 (99%) and 704 (94%) participants from CR1 and CR2 having complete data for analysis. Primary outcome was change in prevalence estimates of NAFLD (defined by a fatty liver index ≥ 60 in the absence of excess alcohol and viral hepatitis) between 2003 and 2018., Results: Crude prevalence of NAFLD increased from 32.7% to 38.8% (P < 0.01), while age-standardized/sex-standardized prevalence increased from 32.4% to 35.4% (P < 0.01). Concurrently, prevalence of obesity defined by BMI and elevated waist circumference increased 28% and 25%, respectively. Women had a greater increase in the prevalence of NAFLD than men, in parallel with increasing prevalence of obesity. Proportion of participants consuming takeaway food greater than once weekly increased significantly over time. Up to 60% of NAFLD patients require additional tests for assessment of significant fibrosis., Conclusions: Crude and age-standardized/sex-standardized prevalence of NAFLD have both increased significantly over the last 15 years, particularly among women, in association with a parallel rise in the prevalence of obesity., (© 2023 The Authors. Journal of Gastroenterology and Hepatology published by Journal of Gastroenterology and Hepatology Foundation and John Wiley & Sons Australia, Ltd.)
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- 2023
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41. Not Just Another "Bloody" Case of Right Heart Failure.
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Ravindranayagam N, Vaz K, and Gow P
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- Humans, Hemorrhage, Hepatic Artery, Heart Failure diagnosis, Heart Failure etiology, Heart Failure therapy, Telangiectasia, Hereditary Hemorrhagic
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- 2023
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42. Testosterone is lower in men with non-alcoholic fatty liver disease and alcohol-related cirrhosis and is associated with adverse clinical outcomes.
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Apostolov R, Wong D, Low E, Vaz K, Spurio J, Worland T, Liu D, Chan RK, Gow P, Grossmann M, and Sinclair M
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- Male, Humans, Middle Aged, Testosterone, Retrospective Studies, Severity of Illness Index, Liver Cirrhosis, Alcoholic complications, Non-alcoholic Fatty Liver Disease complications, End Stage Liver Disease
- Abstract
Background/aims: Low serum testosterone is common in cirrhotic men, but the impact of disease aetiology remains uncertain. This study compares serum total testosterone (TT) levels by disease aetiology and assesses its prognostic value., Methods: Single-centre retrospective study of cirrhotic men who had TT levels measured between 2002 and 2020. A cut-off of 12 nmol/L was used to define low TT and 230 pmol/L for calculated free testosterone (cFT). Linear and logistic regression used to adjust for variables known to affect testosterone levels and assess for an association between levels and outcomes., Results: Of 766 cirrhotic men, 33.3% had alcohol-related liver disease (ALD) and 11.9% had non-alcoholic fatty liver disease (NAFLD). The median age was 56 years (interquartile range (IQR) 50-61), and the model for end-stage liver disease (MELD) score 14 (IQR 9-20). TT levels were low in 53.3% of patients, (median 11.0 nmol/L; IQR 3.7-19.8) and cFT low in 79.6% (median 122 pmol/L; IQR 48.6-212). Median TT was lower in men with ALD (7.6 nmol/L; IQR 2.1-16.2) and NAFLD (9.8 nmol/L; IQR 2.75-15.6) compared to other aetiologies (11.0 nmol/L; IQR 3.73-19.8) ( p < 0.001 for all), which remained true after adjustment for age and MELD score. TT was inversely associated with 12-month mortality or transplant (381 events, p = 0.02) and liver decompensation (345 events, p = 0.004)., Conclusions: Low serum testosterone is common in cirrhotic men and is associated with adverse clinical outcomes. TT levels are significantly lower in ALD and NAFLD compared to other disease aetiologies. Further large-scale studies are required to assess the potential benefits of testosterone therapy.
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- 2023
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43. Assessing the safety profile of voriconazole use in suspected COVID-19-associated pulmonary aspergillosis-a two-centre observational study.
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Costa-Pinto R, Klink S, Rotherham H, Perera P, Finlay L, Urbancic K, Vaz K, Trubiano J, and Bellomo R
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- Animals, Voriconazole adverse effects, Antifungal Agents adverse effects, Retrospective Studies, Triazoles adverse effects, COVID-19 veterinary, Pulmonary Aspergillosis drug therapy, Pulmonary Aspergillosis veterinary
- Abstract
The decision to use voriconazole for suspected COVID-19-associated pulmonary aspergillosis (CAPA) is based on clinical judgement weighed against concerns about its potential toxicity. We assessed the safety profile of voriconazole for patients with suspected CAPA by conducting a retrospective study of patients across two intensive care units. We compared changes in any liver enzymes or bilirubin and any new or increasing corrected QT interval (QTc) prolongation following voriconazole use to patient baseline to indicate possible drug effect. In total, 48 patients with presumed CAPA treated with voriconazole were identified. Voriconazole therapy was administered for a median of 8 days (interquartile range [IQR] 5-22) and the median level was 1.86 mg/L (IQR 1.22-2.94). At baseline, 2% of patients had a hepatocellular injury profile, 54% had a cholestatic injury profile, and 21% had a mixed injury profile. There were no statistically significant changes in liver function tests over the first 7 days after voriconazole initiation. At day 28, there was a significant increase in alkaline phospahte only (81-122 U/L, P = 0.006), driven by changes in patients with baseline cholestatic injury. In contrast, patients with baseline hepatocellular or mixed injury had a significant decrease in alanine transaminase and aspartate transaminase. Baseline QTc was 437 ms and remained unchanged after 7 days of voriconazole therapy even after sensitivity analysis for concomitantly administered QT prolonging agents. Therefore, at the doses used in this study, we did not detect evidence of significant liver or cardiac toxicity related to voriconazole use. Such information can be used to assist clinicians in the decision to initiate such treatment., (© The Author(s) 2023. Published by Oxford University Press on behalf of The International Society for Human and Animal Mycology.)
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- 2023
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44. Letter to the Editor: Predicting mortality after transjugular intrahepatic portosystemic shunt in older adult patients with cirrhosis-Does novelty supplant the standard?
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Vaz K, Little R, Majeed A, Roberts S, and Kemp W
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- Humans, Aged, Liver Cirrhosis complications, Liver Cirrhosis surgery, Portasystemic Shunt, Transjugular Intrahepatic, Hepatic Encephalopathy
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- 2023
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45. Multidisciplinary Tiered Care Is Effective for Children and Adolescents With Rumination Syndrome.
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Sabella J, Kroon Van Diest AM, Bali N, Vaz K, Yacob D, Di Lorenzo C, and Lu PL
- Subjects
- Adolescent, Child, Female, Humans, Male, Ambulatory Care, Retrospective Studies, Treatment Outcome, Vomiting etiology, Vomiting therapy, Rumination Syndrome
- Abstract
Objectives: Rumination syndrome (RS) can be challenging to treat and data on treatment outcomes in children are limited. The objective of this study was to evaluate outcomes of children with RS treated with tailored outpatient and inpatient strategies., Methods: We performed a retrospective cohort study of children <18 years old with RS evaluated at our institution from 2018 to 2020. At our institution, we use a multidisciplinary, tiered approach to treatment based on presentation severity. Children with RS either undergo outpatient treatment program (OP) or participate in an intensive outpatient program (IOP) or an intensive inpatient program (IP). We reviewed baseline characteristics and assessed severity (including frequency of regurgitation/vomiting, route of nutrition, and weight loss) at baseline, at completion of treatment, and at a follow-up time point., Results: We included 171 children with RS (64% female, median age 13 years, interquartile range (IQR) 10-15), 123 of whom had post-treatment data after completing OP, IOP, or IP. At baseline, 66% of patients were vomiting daily and 40% were losing weight. After treatment, 72% of OP, 95% of IOP, and 96% of IP patients reported that symptoms were better or fully resolved compared to baseline. In all 3 treatment groups, patients were vomiting, losing weight, and skipping meals significantly less after treatment compared to baseline. At follow-up (median 5.3 months), 86% of IOP and 66% of IP patients had symptoms that remained better or resolved., Conclusions: RS can cause severe symptoms, impacting nutritional status and school participation. However, multidisciplinary care in a tiered approach leads to significant symptomatic improvement., Competing Interests: The authors report no conflicts of interest., (Copyright © 2022 by European Society for European Society for Pediatric Gastroenterology, Hepatology, and Nutrition and North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition.)
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- 2023
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46. Intensive Outpatient Treatment of Pediatric Rumination Syndrome in the Era of Telemedicine.
- Author
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Hawa K, Lu PL, Holzmacher M, Wall J, Bali N, Vaz K, Yacob D, Di Lorenzo C, and Van Diest AK
- Subjects
- Adolescent, Child, Humans, Young Adult, Adult, Outpatients, Ambulatory Care, COVID-19 therapy, Rumination Syndrome, Telemedicine methods
- Abstract
Objectives: We have had success treating children with severe rumination syndrome using a multidisciplinary intensive outpatient program (IOP) involving multiple treatment sessions daily. During the coronavirus disease 2019 (COVID-19) pandemic, we temporarily transitioned care to telemedicine. The objective of this study is to compare outcomes of patients with rumination syndrome who completed IOP treatment in person versus by telemedicine., Methods: We performed a retrospective review of patients diagnosed with rumination syndrome who participated in IOP treatment from 2018 to 2020. Similar treatment sessions were performed involving medical and behavioral techniques provided by a multidisciplinary team during telemedicine visits. Families/patients were asked to complete a survey outlining their child's current rumination symptom severity and review the IOP., Results: We included 34 patients (79% F, median age 15 years, range 7-19 years) who completed IOP treatment. Twenty-six patients (76%) were treated in person and 8 patients (24%) by telemedicine. For patients treated in person, 76% (19/25) had improvement in symptoms while 16% (4/25) had complete resolution of symptoms. For patients treated by telemedicine, 88% (7/8) had improvement in their symptoms. There were no significant differences between groups in likelihood of improvement. Overall, 78% (18/23) preferred in person therapy while 17% (4/23) did not have a preference. All 18 of the in-person cohort who completed follow-up surveys preferred in-person management., Conclusions: Multidisciplinary intensive outpatient treatment for children and adolescents with severe rumination syndrome is effective. Although telemedicine may be an alternative to in person therapy, majority of families prefer in person visits., Competing Interests: The authors report no conflicts of interest., (Copyright © 2022 by European Society for European Society for Pediatric Gastroenterology, Hepatology, and Nutrition and North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition.)
- Published
- 2023
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47. Rate of early hospital readmission amongst cirrhotic patients is high in Australia: experience from a single liver transplant centre.
- Author
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Vaz K, Tan K, Chew M, Crawford J, Ma R, Grace J, Gow P, Sinclair M, and Testro A
- Subjects
- Male, Humans, Middle Aged, Female, Patient Readmission, Risk Factors, Retrospective Studies, Gastrointestinal Hemorrhage, Liver Cirrhosis epidemiology, Liver Cirrhosis surgery, Victoria epidemiology, Liver Transplantation, Esophageal and Gastric Varices
- Abstract
Background and Aims: The 30-day hospital readmission rate in cirrhotic patients has been demonstrated to be up to 40% in international studies, but is not well studied in Australia. The aim of the current study was to report on the rate and cause of 30-day hospital readmission from a single liver transplant referral centre, including a cost analysis of readmissions., Methods: This was a retrospective study of consecutive cirrhotic patients admitted to a liver transplant centre in Victoria, Australia, between 1 January 2019 and 31 December 2019. Cases were identified through International Classification of Diseases, Tenth Revision, 10 coding for cirrhosis and its complications. Baseline demographic data, liver-related complications and unrelated extra-hepatic comorbidities, laboratory values and prognostic scores were collected from the electronic medical record., Results: One hundred seventy-nine (63% men; median age at index admission, 59 years) patients who were admitted 427 times during the study period were included in the final analysis. The 30-day hospital readmission rate was 46%, with the majority of readmissions attributable to fluid overload (29%), miscellaneous reasons (27%) and infection (20%). One fifth of readmissions were considered preventable. History of variceal haemorrhage was found to be an independent predictor of 30-day hospital readmission. The annual cost of readmission is over AU$2.7 million and the median cost of hospital readmission was about AU$9000., Conclusions: The 30-day hospital readmission rate of 46% is higher than previously reported and almost half of cases were caused by either fluid overload or infection., (© 2022 Royal Australasian College of Physicians.)
- Published
- 2022
- Full Text
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48. Providing a Constipation Action Plan to Families of Children With Constipation Decreases Health Care Utilization.
- Author
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Hawa K, Janse S, Lee J, Bali N, Vaz K, Yacob D, Di Lorenzo C, and Lu PL
- Subjects
- Child, Humans, Ambulatory Care, Hospitalization, Constipation therapy, Emergency Service, Hospital, Patient Acceptance of Health Care
- Abstract
Objectives: To evaluate whether providing a constipation action plan (CAP) to families of children with constipation at outpatient gastroenterology (GI) visits affects health care utilization of the GI department., Methods: We created a CAP to be included in the after visit summary of children seen in our GI Clinic. We compared the number of patient telephone calls, electronic messages, and urgent care (UC) visits, emergency department (ED) visits, and hospitalizations within 3 months after the visit of patients who received the CAP compared to those who did not using inverse probability treatment weighting (IPTW) analysis. For families who received the CAP at a follow-up visit, we compared these variables in the 3 months before and after the CAP was provided using paired t test and McNemar's test as appropriate., Results: We included 336 patients who received the CAP and 2812 who did not. After IPTW adjustment, there were fewer patient telephone calls for patients who received the CAP (P = 0.0006). The difference in patient electronic messages was not statistically significant (P = 0.09). For the 45 patients who received the CAP at a follow-up visit, there were on average 1.8 more patient telephone calls made prior to receiving the CAP than after (95% confidence interval (CI) = 0.8-2.8; P = 0.0007) and 2.3 more patient electronic messages received (95% CI = 0.1-4.5; P = 0.04). There were no differences in UC/emergency department visits or hospitalizations., Conclusions: We found that providing a CAP to families of children with constipation decreases health care utilization. Further studies are needed to determine whether this impacts patient outcomes., Competing Interests: The authors report no conflicts of interest., (Copyright © 2022 by European Society for European Society for Pediatric Gastroenterology, Hepatology, and Nutrition and North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition.)
- Published
- 2022
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49. Anal Sphincter Defect and Fecal Incontinence.
- Author
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Mansi S, Vaz K, Santucci NR, El-Chammas K, Graham K, Rosen NG, and Kaul A
- Abstract
Anal sphincter defects can lead to fecal incontinence. The relationship between the extent of defect and continence is controversial. Magnetic resonance imaging (MRI) of the pelvis can assess anal sphincter defects. Transrectal ultrasonography (TRUS) is used to assess sphincter integrity in adults. We present a 17-year-old male with history of sexual abuse, rectal prolapse, and fecal incontinence. MRI showed a small defect that did not explain his clinical presentation. TRUS identified more extensive defects which were not picked up by MRI. The patient had rectopexy, and his rectal prolapse and fecal incontinence resolved. TRUS was superior in identifying sphincter defects compared with MRI. Our case also highlights that continence is possible despite large sphincter defects in pediatric patients. This may reflect the compensatory mechanism of residual sphincter in the absence of the aggravating factors like rectal prolapse., Competing Interests: The authors report no conflicts of interest., (Copyright © 2022 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the European Society for Pediatric Gastroenterology, Hepatology, and Nutrition and the North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition.)
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- 2022
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50. Determinants of Short- and Long-Term Outcomes of an Australian Cohort of Patients Admitted with Alcoholic Hepatitis.
- Author
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Vaz K, Little R, Majeed A, Kemp W, and Roberts SK
- Subjects
- Australia epidemiology, Female, Humans, Male, Middle Aged, Prognosis, Retrospective Studies, Severity of Illness Index, Hepatic Encephalopathy, Hepatitis, Alcoholic diagnosis
- Abstract
Background and Aims: Alcoholic hepatitis is a common condition with high mortality. This study aimed to firstly describe the presentation, treatment, and short- and long-term outcomes of an Australian cohort of patients admitted to hospital with alcoholic hepatitis and secondly to validate existing prognostic models., Methods: This is a retrospective study of consecutive patients admitted with alcoholic hepatitis to a major academic liver center in Melbourne, Australia, between January 1, 2010, and December 31, 2019. Cases were identified through appropriate International Classification of Diseases version 10 coding as well as review of non-coded patients with compatible biochemistry. Baseline demographic data, alcohol consumption, laboratory values, treatment, and outcomes at 30 days, 90 days, and 12 months post-diagnosis were collected from electronic medical records. Mortality data were extracted from an independent state government death registry., Results: In total, 126 patients (72 males [57%], median age 51 years) were included in the final analysis. Ninety-five (75%) were cirrhotic at diagnosis, 81 (64%) met criteria for severe alcoholic hepatitis, and 41 (33%) had an infection during their index admission. 54% of eligible patients were treated with corticosteroids. 30-day and 12-month mortality rates were 8.7% and 27.1%, respectively, with hepatic encephalopathy (hazard ratio 5.45) and neutrophil-to-lymphocyte ratio (hazard ratio 1.09) independent markers for 12-month mortality on Cox regression analysis. Glasgow alcoholic hepatitis score outperformed other major prognostic models for short-term mortality., Conclusions: The 12-month mortality rate of 27% following alcoholic hepatitis is lower than previously reported studies, with hepatic encephalopathy and neutrophil-to-lymphocyte ratio predictive of long-term outcome., (© 2021. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
- Published
- 2022
- Full Text
- View/download PDF
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