6 results on '"Neel Patel"'
Search Results
2. The Two-Point Technique for Fluoroscopic-Guided Endoscopic Procedures in Urology: A Validation Study
- Author
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Neel Patel, Majid Eshghi, Ariel Schulman, Michael Iorga, John Phillips, Rogerio Huang, Jonathan Wagmaister, Sean Fullerton, and Muhammad Choudhury
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Adult ,Male ,medicine.medical_specialty ,Validation study ,Urology ,Radiation Dosage ,Young Adult ,Humans ,Medicine ,Fluoroscopy ,Prospective Studies ,Ureteroscopy ,Aged ,Aged, 80 and over ,medicine.diagnostic_test ,business.industry ,Endoscopy ,Patient exposure ,Middle Aged ,Radiation Exposure ,cardiovascular system ,Regression Analysis ,Female ,Radiology ,business - Abstract
Introduction: The widespread use of diagnostic and therapeutic ionizing radiation raises concerns regarding excessive occupational and patient exposure. In this study, we test a novel fluo...
- Published
- 2019
3. Conservative Management of a Pyelovenous Fistula After a Renal Gunshot Wound
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Neel Patel, Brian M. Inouye, Judd W. Moul, Ariel Schulman, Ghalib Jibara, and Michael Stern
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medicine.medical_specialty ,Conservative management ,business.industry ,Urology ,Fistula ,030232 urology & nephrology ,Case Reports ,Case presentation ,medicine.disease ,gunshot ,Surgery ,03 medical and health sciences ,trauma ,0302 clinical medicine ,030220 oncology & carcinogenesis ,medicine ,fistula ,penetrating ,renal ,Gunshot wound ,business ,bullet - Abstract
Background: We report the diagnosis and management of a pyelovenous fistula that was detected 5 days after a renal gunshot wound (GSW). Case Presentation: A 16-year-old boy presented to the trauma center with a single GSW to the right flank. CT scan revealed a shattered right kidney with active contrast extravasation and ureteral discontinuity, metal fragments in the L1 vertebra, and a bullet lodged in the upper pole of the left kidney. The patient was taken for emergent exploratory laparotomy. A right nephrectomy was performed. A left retrograde pyelogram demonstrated an intact collecting system. A left Double-J stent was placed to protect against delayed thermal injury. Repeat pyelogram on postoperative day 5 revealed a pyelovenous fistula and a stent was left in place. At 6 weeks, interval pyelogram showed complete resolution of the pyelovenous fistula and the stent was removed. At 6 months the patient was asymptomatic and normotensive with an unremarkable left kidney on ultrasonography. Conclusion: Pyelovenous fistula is a rare complication of a retained bullet in the kidney. Conservative management with ureteral stenting was effective in resolving the fistula.
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- 2019
4. Metastatic Colorectal Adenocarcinoma in a Bifid Ureter
- Author
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Nikhil Gopal, Michael Stern, Neel Patel, Majid Eshghi, and Gerald Matthews
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medicine.medical_specialty ,Urology ,bifid ureter ,030232 urology & nephrology ,Case Reports ,Metastasis ,03 medical and health sciences ,0302 clinical medicine ,Ureter ,Biopsy ,medicine ,Enhancing Lesion ,Ureteroscopy ,Hydronephrosis ,medicine.diagnostic_test ,business.industry ,medicine.disease ,colorectal adenocarcinoma ,Lymphatic system ,medicine.anatomical_structure ,secondary ureteral metastasis ,030220 oncology & carcinogenesis ,Radiology ,ureteroscopy ,Bifid ureter ,business - Abstract
Background: Secondary malignancies of the ureter are uncommon. We report the diagnosis and management of metastatic colon cancer to the bifurcation of a bifid ureter. Case Presentation: A 59-year-old man presented with diffuse metastasis with right hydronephrosis in both renal moieties of a partially duplicated system and an enhancing lesion within the proximal common ureter. Ureteral biopsy was positive for colorectal adenocarcinoma. The patient was subsequently started on palliative chemoradiation. Conclusion: The ureter is a rare location for hematogenous/lymphatic metastases. When a ureteral mass is present on imaging, ureteroscopy should be performed to characterize the extent of tumor and to rule out secondary malignancy.
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- 2019
5. Device-Related Adverse Events During Percutaneous Nephrolithotomy: Review of the Manufacturer and User Facility Device Experience Database
- Author
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Sensuke Konno, Majid Eshghi, John Phillips, Jonathan Bloom, Ariel Schulman, Nikil Uppaluri, Neel Patel, and Muhammad Choudhury
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medicine.medical_specialty ,Databases, Factual ,Urology ,medicine.medical_treatment ,030232 urology & nephrology ,Hemorrhage ,Nephrolithotomy, Percutaneous ,03 medical and health sciences ,Postoperative Complications ,0302 clinical medicine ,medicine ,Humans ,User Facility ,Intraoperative Complications ,Percutaneous nephrolithotomy ,Adverse effect ,Upper urinary tract ,business.industry ,Foreign Bodies ,Surgical Instruments ,Surgery ,Equipment failure ,Logistic Models ,030220 oncology & carcinogenesis ,Equipment Failure ,Urinary Calculi ,business - Abstract
Percutaneous nephrolithotomy (PCNL) is an established technique for removal of large stones from the upper urinary tract. It is a complex multistep procedure requiring several classes of instruments that are subject to operator misuse and device malfunction. We report device-related adverse events during PCNL from the Manufacturer and User Facility Device Experience (MAUDE) database using a recently developed standardized classification system.The MAUDE database was queried for "percutaneous nephrolithotomy" from 2006 to 2016. The circumstances and patient complications associated with classes of devices used during PCNL were identified. We then utilized a novel MAUDE classification system to categorize clinical events. Logistic regression analysis was performed to identify associations between device classes and severe adverse events.A total of 218 device-related events were reported. The most common classes included: lithotripter 53 (24.3%), wires 43 (19.7%), balloon dilators 30 (13.8%), and occlusion balloons 28 (12.8%). Reported patient complications included need for a second procedure 12 (28.6%), bleeding 8 (19.0%), retained fragments 7 (16.7%), prolonged procedure 4 (9.5%), ureteral injury 2 (4.8%), and conversion to an open procedure 3 (7.1%). Using a MAUDE classification system, 176 complications (81%) were Level I (mild/none), 26 (12%) were Level II (moderate), 15 (7%) were Level III (severe), and 1 (0.5%) was Level IV (life threatening). On univariate analysis, balloon dilators had the highest risk of Level II-IV complications compared with the other device classes [odds ratio: 4.33, confidence interval: 1.978, 9.493, p 0.001]. The device was evaluated by the manufacturer in 93 (42.7%) cases, with 54.8% of reviewed cases listing the source of malfunction as misuse by the operator.PCNL is subject to a wide range of device-related adverse events. A MAUDE classification system is useful for standardized, clinically-relevant reporting of events. Our findings highlight the importance of proper surgeon training with devices to maximize efficiency and decrease harm.
- Published
- 2017
6. Master Autophagy Regulator Transcription Factor EB Regulates Cigarette Smoke-Induced Autophagy Impairment and Chronic Obstructive Pulmonary Disease–Emphysema Pathogenesis
- Author
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Neel Patel, Manish Bodas, David Silverberg, Kyla Walworth, and Neeraj Vij
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Male ,0301 basic medicine ,Physiology ,Clinical Biochemistry ,Biology ,medicine.disease_cause ,Biochemistry ,Cell Line ,Pathogenesis ,Mice ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Smoke ,Tobacco ,Autophagy ,medicine ,Animals ,Humans ,Gemfibrozil ,Molecular Biology ,General Environmental Science ,Cell Nucleus ,COPD ,Lung ,Basic Helix-Loop-Helix Leucine Zipper Transcription Factors ,Cell Biology ,medicine.disease ,respiratory tract diseases ,Disease Models, Animal ,Original Research Communications ,030104 developmental biology ,medicine.anatomical_structure ,Gene Expression Regulation ,Pulmonary Emphysema ,chemistry ,Gene Knockdown Techniques ,030220 oncology & carcinogenesis ,Immunology ,General Earth and Planetary Sciences ,TFEB ,Female ,Fisetin ,Oxidative stress ,medicine.drug - Abstract
Recent studies have shown that cigarette smoke (CS)-induced oxidative stress impairs autophagy, resulting in aggresome-formation that correlates with severity of chronic obstructive pulmonary disease (COPD)-emphysema, although the specific step in autophagy pathway that is impaired is unknown. Hence, in this study, we aimed to evaluate the role of master autophagy transcription factor EB (TFEB) in CS-induced COPD-emphysema pathogenesis.We first observed that TFEB accumulates in perinuclear spaces as aggresome-bodies in COPD lung tissues of tobacco smokers and severe emphysema subjects, compared with non-emphysema or nonsmoker controls. Next, Beas2b cells and C57BL/6 mice were exposed to either cigarette smoke extract (CSE) or subchronic-CS (sc-CS), followed by treatment with potent TFEB-inducing drug, gemfibrozil (GEM, or fisetin as an alternate), to experimentally verify the role of TFEB in COPD. Our in vitro results indicate that GEM/fisetin-mediated TFEB induction significantly (p 0.05) decreases CSE-induced autophagy-impairment (Ub/LC3B reporter and autophagy flux assay) and resulting aggresome-formation (Ub/p62 coexpression/accumulation; immunoblotting and staining) by controlling reactive oxygen species (ROS) activity. Intriguingly, we observed that CS induces TFEB accumulation in the insoluble protein fractions of Beas2b cells, which shows a partial rescue with GEM treatment. Moreover, TFEB knockdown induces oxidative stress, autophagy-impairment, and senescence, which can all be mitigated by GEM-mediated TFEB induction. Finally, in vivo studies were used to verify that CS-induced autophagy-impairment (increased Ub, p62, and valosin-containing protein in the insoluble protein fractions of lung/cell lysates), inflammation (interleukin-6 [IL-6] levels in bronchoalveolar lavage fluid and iNOS expression in lung sections), apoptosis (caspase-3/7), and resulting emphysema (hematoxylin and eosin [HE]) can be controlled by GEM-mediated TFEB induction (p 0.05).CS exposure impairs autophagy in COPD-emphysema by inducing perinuclear localization of master autophagy regulator, TFEB, to aggresome-bodies.TFEB-inducing drug(s) can control CS-induced TFEB/autophagy-impairment and COPD-emphysema pathogenesis. Antioxid. Redox Signal. 27, 150-167.
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- 2017
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