Thomas Chi

ORCID: 0000-0003-2127-2673
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About
Contact & Profiles
Research Areas
  • Kidney Stones and Urolithiasis Treatments
  • Pediatric Urology and Nephrology Studies
  • Ureteral procedures and complications
  • Radiation Dose and Imaging
  • Renal and Vascular Pathologies
  • Urological Disorders and Treatments
  • Therapeutic Uses of Natural Elements
  • Urinary Bladder and Prostate Research
  • Paleopathology and ancient diseases
  • Prostate Cancer Diagnosis and Treatment
  • Biomedical Research and Pathophysiology
  • Porphyrin Metabolism and Disorders
  • Pelvic floor disorders treatments
  • Healthcare Policy and Management
  • Urinary Tract Infections Management
  • Gout, Hyperuricemia, Uric Acid
  • Glaucoma and retinal disorders
  • Urologic and reproductive health conditions
  • Gallbladder and Bile Duct Disorders
  • Organ Donation and Transplantation
  • Prostate Cancer Treatment and Research
  • Renal function and acid-base balance
  • Parathyroid Disorders and Treatments
  • Renal and related cancers
  • Bladder and Urothelial Cancer Treatments

University of California, San Francisco
2016-2025

University of Alabama at Birmingham
2025

Seattle University
2016-2020

Communities In Schools of Orange County
2020

Columbia College - South Carolina
2020

Madison Group (United States)
2020

Hershey (United States)
2020

California State University, Sacramento
2020

American Urological Association
2019

University of San Francisco
2019

Results of previous studies have strongly indicated that the prevalence elevated intraocular pressure is greater in blacks than whites and are more susceptible to glaucomatous damage at any given level pressure. It has also been suggested a larger disc area might predispose an eye damage. We investigated possibility clinically quantifiable differences exist optic parameters between normotensive white black patients. Disc area, cup-to-disc ratio, cup volume measured with video-ophthalmograph...

10.1001/archopht.1989.01070010858029 article EN Archives of Ophthalmology 1989-06-01

No AccessJournal of UrologyAdult Urology1 May 2012Impact Nutritional Factors on Incident Kidney Stone Formation: A Report From the WHI OS Mathew D. Sorensen, Arnold J. Kahn, Alex P. Reiner, Timothy Y. Tseng, James M. Shikany, Robert B. Wallace, Thomas Chi, Jean Wactawski-Wende, Rebecca Jackson, Mary Jo O'Sullivan, Natalia Sadetsky, Marshall L. Stoller, and Working Group SorensenMathew Sorensen Department Urology, School Medicine, University Washington, Seattle, Washington More articles by...

10.1016/j.juro.2011.12.077 article EN The Journal of Urology 2012-03-16

Obesity is a strong risk factor for nephrolithiasis, but the role of physical activity and caloric intake remains poorly understood. We evaluated this relationship in 84,225 women with no history stones as part Women’s Health Initiative Observational Study, longitudinal, prospective cohort postmenopausal enrolled from 1993 to 1998 8 years’ median follow-up. The independent association (metabolic equivalents [METs]/wk), calibrated dietary energy intake, body mass index (BMI) incident kidney...

10.1681/asn.2013050548 article EN Journal of the American Society of Nephrology 2013-12-13

We present our management of urethral stenosis and rectourinary fistula resulting from prostate cancer therapy. concentrated on cases refractory to minimally invasive treatment, such as dilation, urethrotomy, urinary and/or fecal diversion.In prospectively collected reconstruction database we identified patients who underwent or also received prior treatment for cancer. documented demographics, pretreatment characteristics, therapy type, type success.A total 48 met the inclusion criteria,...

10.1016/j.juro.2006.07.152 article EN The Journal of Urology 2006-11-03

LithoVue™ is a novel, single-use, digital flexible ureteroscope that was released to the US market in January 2016. There are scant data regarding its performance humans. Procedural outcomes comparing LithoVue with reusable ureteroscopes presented patients undergoing ureteroscopy for upper urinary tract pathology.

10.1089/end.2017.0027 article EN Journal of Endourology 2017-02-15

Ectopic calcification is a driving force for variety of diseases, including kidney stones and atherosclerosis, but initiating factors remain largely unknown. Given its importance in seemingly divergent disease processes, identifying fundamental principal actors ectopic may have broad translational significance. Here we establish Drosophila melanogaster model by inhibiting xanthine dehydrogenase whose deficiency leads to humans dogs. Micro X-ray absorption near edge spectroscopy (μXANES)...

10.1371/journal.pone.0124150 article EN cc-by PLoS ONE 2015-05-13

Introduction: Reusable ureteroscope durability and need for repair are significant sources of expense inefficiency patients urologists. Utilization LithoVue™, a disposable flexible digital ureteroscope, may address some these concerns. To identify its economic impact on clinical care, we performed micro-cost comparison between reusable fiberoptic ureteroscopes (URF-P6™) LithoVue. Patients Methods: For this prospective, single-center micro-costing study, all consecutive ureteroscopies during...

10.1089/end.2017.0523 article EN Journal of Endourology 2017-12-14

Objectives To identify associations between 24‐h urine abnormalities and clinical risk factors for recurrent stone formers. Patients methods The Registry Stones of the Kidney Ureter was queried all patients who underwent studies. were categorised by number disease. Stone recurrence calculated events per person‐year. We utilised a novel method to calculate an overall severity score parameters. urinary analyte values then compared using Student's t ‐tests, chi‐square analysis negative binomial...

10.1111/bju.16659 article EN BJU International 2025-01-23

No AccessJournal of UrologyAdult Urology1 Sep 2015Laparoscopic Nephrectomy with Autotransplantation: Safety, Efficacy and Long-Term Durability Geraldine Tran, Krishna Ramaswamy, Thomas Chi, Maxwell Meng, Christopher Freise, Marshall L. Stoller TranGeraldine Tran School Medicine, University California, San Francisco, California Equal study contribution. More articles by this author , RamaswamyKrishna Ramaswamy Department Urology, ChiThomas Chi Financial interest and/or other relationship Bard...

10.1016/j.juro.2015.03.089 article EN The Journal of Urology 2015-05-01

Ultrasound-guided renal access for percutaneous nephrolithotomy (PCNL) is a safe, effective, and low-cost procedure commonly performed worldwide, but technique underutilized by urologists in the United States. The purpose of this article to familiarize practicing urologist with methods ultrasound guidance access. We discuss two alternative techniques gaining PCNL under guidance. also describe novel using puncture needle reposition residual stone fragments avoid additional tract dilation....

10.1089/end.2015.0185 article EN Journal of Endourology 2015-09-28

Purpose: Nephrolithiasis is an increasingly common ailment in the United States. Ureteroscopic management has supplanted shockwave lithotripsy as most treatment of upper tract stone disease. Ureteral stricture a rare but serious complication disease and its management. The impact new technologies more widespread ureteroscopic on rates unknown. We describe our experience managing strictures incurred following ureteroscopy for Materials Methods: Records patients managed at four tertiary care...

10.1089/end.2017.0657 article EN Journal of Endourology 2018-01-12

To define the learning curve associated with adopting ultrasound guidance for prone percutaneous nephrolithotomy (PCNL) experienced surgeon.A prospective cohort study of consecutive patients undergoing PCNL renal tract access and dilation was performed. Clinical data reviewed included success in gaining guidance, total fluoroscopic screening time, radiation exposure dose. cases performed matched stone size served as control cases.One hundred ultrasound-guided procedures by a single...

10.1089/end.2016.0241 article EN Journal of Endourology 2016-05-06

Elevated uric acid (UA) is a key risk factor for many disorders, including metabolic syndrome, gout and kidney stones. Despite frequent occurrence of these the genetic pathways influencing UA metabolism association with disease remain poorly understood. In humans, elevated levels resulted from loss urate oxidase (Uro) gene around 15 million years ago. Therefore, we established Drosophila melanogaster model reduced expression orthologous Uro to study pathogenesis arising UA. Reduced in...

10.1371/journal.pgen.1008318 article EN cc-by PLoS Genetics 2019-08-15

This study reports on a prospective, multicenter, single-arm, clinical trial utilizing the SonoMotion (San Mateo, California) Break Wave lithotripsy (BWL) device to fragment urinary stones.

10.1097/ju.0000000000004091 article EN The Journal of Urology 2024-09-10

No AccessJournal of UrologyAdult Urology1 Apr 2016Coronary Artery Calcium Score and Association with Recurrent Nephrolithiasis: The Multi-Ethnic Study Atherosclerosis Ryan S. Hsi, Andrew J. Spieker, Marshall L. Stoller, David R. Jacobs, Alex P. Reiner, Robyn McClelland, Arnold Kahn, Thomas Chi, Moyses Szklo, Mathew D. Sorensen HsiRyan Hsi Department Urology, School Medicine, University Washington, Seattle, Washington , SpiekerAndrew Spieker Biostatistics, StollerMarshall Stoller...

10.1016/j.juro.2015.10.001 article EN The Journal of Urology 2015-10-16
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