About

Noah Eliezer Canvasser, M.D., is an Assistant Professor in the Department of Urologic Surgery at UC Davis Health. He is a fellowship-trained endourologist and minimally invasive surgeon specializing in the care of adults with kidney stone disease, kidney obstruction, kidney cancer, and enlarged prostates/difficulty urinating. He also provides care for pediatric patients with kidney stone disease. Dr. Canvasser has a particular interest in the medical management and prevention of recurrent kidney stones. His surgical expertise includes complex procedures such as percutaneous nephrolithotomy (PCNL), holmium laser enucleation of the prostate (HOLEP), and various minimally-invasive laparoscopic and robotic surgeries for non-functioning kidneys, kidney obstruction, and kidney cancer. Along with Dr. Jonathan Moore, he is involved in one of the busiest kidney stone and HOLEP programs in Northern California. His research focuses on the prevention and management of complex kidney stone disease, as well as improving minimally-invasive surgical techniques for kidney obstruction, kidney cancer, and prostate enlargement. Dr. Canvasser completed his undergraduate studies at UCLA, earned his M.D. from UC Irvine College of Medicine, and completed his internship and residency in urology at the University of Michigan Medical Center. He further specialized through a fellowship in Endourology and Minimally Invasive Surgery at the University of Texas Southwestern Medical Center.

Research topics

• Medicine
• Internal medicine
• Surgery
• Computer Science
• Nursing
• Artificial Intelligence
• Machine Learning
• Algorithm
• Demography
• Urology
• Intensive care medicine
• Philosophy

Selected publications

• IP72-07 ADVANCING PROFICIENCY IN HOLMIUM LASER ENUCLEATION OF THE PROSTATE: INSIGHTS FROM A SIMULATION-BASED COURSE FOR SENIOR TRAINEES

  The Journal of Urology · 2026-04-27

  article
  PublisherDOI

• Utilization of Laser Enucleation of the Prostate in United States Academic Centers

  JU Open Plus · 2025-07-01 · 1 citations

  articleOpen access

  Objective: As with many new surgical techniques, Holmium and Thulium laser enucleation of the prostate has a steep learning curve with slowly increasing availability to patients. This study sought to evaluate the patient characteristics associated with utilization of laser enucleation of the prostate (LEP) across nationwide academic centers. Methods: The Clinical Practice Solutions Center database was queried to identify men 40 years or older who had procedural intervention for benign prostatic hyperplasia based on International Classification of Diseases-10 and Current Procedure Terminology codes specific to LEP, transurethral resection of the prostate (TURP), laser vaporization, laser coagulation, transurethral incision, microwave thermotherapy, needle ablation, radiofrequency thermotherapy, water vapor thermotherapy, and prostatic urethral lift surgeries. Patient characteristics were analyzed with a mixed effects logistic regression model, including age by decade, race, insurance, and social deprivation index. Results: The analysis included 12,670 patients from 64 centers who underwent surgery. TURP was performed most commonly (40.0%) compared with LEP (24.4%). Every decade in older than 50 years had significantly higher odds of undergoing LEP. Hispanic subjects had significantly higher odds of undergoing LEP. Patients with the least social deprivation had 67% greater odds of receiving LEP than those with the most social deprivation ( P = .01). Conclusions: Multiple factors affect physician and patient choices of treatment. This study demonstrated that older age and Hispanic ethnicity were associated with higher utilization of LEP, while higher social deprivation correlated with lower use of the most durable procedure.

  PublisherDOI

• IP11-27 EVALUATION OF A SURGEON-CONTROLLED CONCEPT AUTOMATED FLUID MANAGEMENT SYSTEM: INITIAL RESULTS FROM A BENCH MODEL

  The Journal of Urology · 2025-04-08

  article1st authorCorresponding
  PublisherDOI

• RANDOMIZED MULTICENTER TRIAL OF URETERAL STENT PLACEMENT VERSUS STENT OMISSION AFTER URETEROSCOPY FOR RENAL STONES

  The Journal of Urology · 2025-04-25 · 3 citations

  article
  PublisherDOI

• MP29-02 EVALUATION OF SURGEON-CONTROLLED CONCEPT FLUID MANAGEMENT SYSTEM WITH LITHOVUE™ ELITE DURING URETEROSCOPIC LASER LITHOTRIPSY: OUTCOMES IN A PRE-CLINICAL PORCINE MODEL

  The Journal of Urology · 2025-04-08

  articleSenior author
  PublisherDOI

• MP26-18 ALPHA LIPOIC ACID REDUCES STONE GROWTH FOR CYSTINURIA PATIENTS: RESULTS FROM A RANDOMIZED, DOUBLE-BLIND, PLACEBO-CONTROLLED CLINICAL TRIAL

  The Journal of Urology · 2024-04-15

  article

  You have accessJournal of UrologyStone Disease: Medical & Dietary Therapy (MP26)1 May 2024MP26-18 ALPHA LIPOIC ACID REDUCES STONE GROWTH FOR CYSTINURIA PATIENTS: RESULTS FROM A RANDOMIZED, DOUBLE-BLIND, PLACEBO-CONTROLLED CLINICAL TRIAL Thomas Chi, David Bayne, Justin Ahn, Krishna Ramaswamy, David T. Tzou, Scott V. Wiener, Jonathan D. Harper, Margaret S. Pearle, Noah E. Canvasser, Simon L. Conti, Roger L. Sur, Greg E. Tasian, Wilson Sui, Heiko Yang, Ukrit Rompsaithong, and Marshall Stoller Thomas ChiThomas Chi , David BayneDavid Bayne , Justin AhnJustin Ahn , Krishna RamaswamyKrishna Ramaswamy , David T. TzouDavid T. Tzou , Scott V. WienerScott V. Wiener , Jonathan D. HarperJonathan D. Harper , Margaret S. PearleMargaret S. Pearle , Noah E. CanvasserNoah E. Canvasser , Simon L. ContiSimon L. Conti , Roger L. SurRoger L. Sur , Greg E. TasianGreg E. Tasian , Wilson SuiWilson Sui , Heiko YangHeiko Yang , Ukrit RompsaithongUkrit Rompsaithong , and Marshall StollerMarshall Stoller View All Author Informationhttps://doi.org/10.1097/01.JU.0001009408.66023.77.18AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: Cystinuria is a rare disease that causes lifelong, recurrent nephrolithiasis. Thiol derivatives are the current standard of care, yet they are expensive and have severe side effect profiles leading to poor compliance. Alpha-lipoic acid (ALA) is a well-tolerated antioxidant compound. In a preclinical murine model, ALA dramatically decreased stone growth compared to controls. This randomized clinical trial aimed to assess the effect of ALA on stone recurrence in cystinuria patients. METHODS: In this randomized, double-blinded, placebo-controlled single institution trial, patients>18 years old with a diagnosis of cystinuria were recruited. Participants were randomized to twice daily 600mg ALA versus placebo for three years. The primary endpoint was stone recurrence, defined as symptomatic stones or interval stone growth measured by computed tomography at baseline and end of the trial. The secondary endpoint was quantitative 24-hour urinary cystine levels. Continuous variables were compared using Mann-Whitney U test or repeated measures of analysis of variance and categorical by chi-square analysis. RESULTS: Of 249 patients screened, 50 participants were randomized to either ALA (n=25) or placebo (n=25). Nine patients on ALA and two on placebo withdrew from the study. The mean stone events were 6±4 versus 5±4 in the ALA and placebo groups, respectively (p=0.47). Compared to only 14% on placebo, 40% percent of patients who received ALA experienced a decrease in stone burden (Figure 1, p=0.06). Overall, mean stone growth was lower in the ALA group (-0.4mm±14.9 vs 8.7mm±15.8, p=0.08). One patient in the ALA group had significantly more growth compared to the rest, in a sub-analysis excluding this patient, the growth rate in the ALA group was -3.0mm±11.5 (p=0.03). There were no differences in quantitative urinary cystine levels. The most common adverse reactions were gastroesophageal reflux (6%) and nausea (4%). CONCLUSIONS: In a randomized clinical trial, 40% of patients who received ALA demonstrated a decrease in their overall stone burden. This occurred without changes in urinary chemistry suggesting that the mechanism of ALA remains unknown. ALA represents a promising alternative medication for cystinuria that reduces stone growth and has minimal adverse reactions. Download PPT Source of Funding: NIH/FDA FD005716 © 2024 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 211Issue 5SMay 2024Page: e420 Advertisement Copyright & Permissions© 2024 by American Urological Association Education and Research, Inc.Metrics Author Information Thomas Chi More articles by this author David Bayne More articles by this author Justin Ahn More articles by this author Krishna Ramaswamy More articles by this author David T. Tzou More articles by this author Scott V. Wiener More articles by this author Jonathan D. Harper More articles by this author Margaret S. Pearle More articles by this author Noah E. Canvasser More articles by this author Simon L. Conti More articles by this author Roger L. Sur More articles by this author Greg E. Tasian More articles by this author Wilson Sui More articles by this author Heiko Yang More articles by this author Ukrit Rompsaithong More articles by this author Marshall Stoller More articles by this author Expand All Advertisement PDF downloadLoading ...

  PublisherDOI

• Reply: Prospective Multicenter Evaluation of Pain Before and After Removal of Nonobstructing Renal Calculi: A CoRE Initiative

  The Journal of Urology · 2024-04-25

  letter

  No AccessJournal of UrologyReply to Letters to the Editor25 Apr 2024Reply: Prospective Multicenter Evaluation of Pain Before and After Removal of Nonobstructing Renal Calculi: A CoRE Initiative Naeem Bhojani, Daniel Wollin, Marawan M. El Tayeb, Kymora B. Scotland, John Knoedler, Karen L. Stern, David-Dan Nguyen, Marcelino Rivera, Michael S. Borofsky, Noah Canvasser, Seth K. Bechis, and Ryan S. Hsi Naeem BhojaniNaeem Bhojani Corresponding Author: Naeem Bhojani, MD, University of Montreal Division of Urology, Centre Hospitalier de l'Université de Montréal, 900 St Denis R04.442, Montreal, Québec , H2X 0A0, Canada ([email protected]) https://orcid.org/0000-0003-2679-2635 , Daniel WollinDaniel Wollin , Marawan M. El TayebMarawan M. El Tayeb , Kymora B. ScotlandKymora B. Scotland , John KnoedlerJohn Knoedler , Karen L. SternKaren L. Stern , David-Dan NguyenDavid-Dan Nguyen , Marcelino RiveraMarcelino Rivera , Michael S. BorofskyMichael S. Borofsky , Noah CanvasserNoah Canvasser , Seth K. BechisSeth K. Bechis , and Ryan S. HsiRyan S. Hsi View All Author Informationhttps://doi.org/10.1097/JU.0000000000003956AboutFull TextPDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareFacebookLinked InTwitterEmail "Reply: Prospective Multicenter Evaluation of Pain Before and After Removal of Nonobstructing Renal Calculi: A CoRE Initiative." The Journal of Urology, Publish Ahead of Print, pp. REFERENCES 1. . Letter: prospective multicenter evaluation of pain before and after removal of nonobstructing renal calculi: a CoRE initiative. J Urol. 2024; 212(1):000-000. doi: 10.1097/JU.0000000000003948 Link, Google Scholar 2. . Prospective multicenter evaluation of pain before and after removal of nonobstructing renal calculi: a CoRE initiative. J Urol.2024; 211(3):436-444. doi: 10.1097/JU.0000000000003799 Link, Google Scholar Funding/Support: None. Conflict of Interest Disclosures: Dr Bhojani: Boston Scientific, Olympus; Dr Wollin: Boston Scientific, Aurie; Dr El Tayeb: Boston Scientific, Cook; Dr Scotland: Boston Scientific, Cook, Storz, Advanced MedTech, Ambu; Dr: Boston Scientific, Cook, Coloplast, Ambu, BD, SonoMotion; Dr Rivera: Boston Scientific, Cook; Dr Borofsky: Boston Scientific; Dr Canvasser: Boston Scientific; Dr Bechis: Boston Scientific, Cook, Dornier. Dr Knoedler: The other authors have nothing Stern to disclose. Ethics Statement: Institutional Review Board approval was obtained at each participating site before study recruitment was initiated. All patients provided written informed consent before participation. Author Contributions: Conception and design: Bhojani, Wollin, El Tayeb, Stern, Nguyen, Rivera, Borofsky, Bechis, Hsi Data analysis and interpretation: Bhojani, Wollin, El Tayeb, Borofsky, Canvasser, Bechis, Hsi Data acquisition: Bhojani, Wollin, El Tayeb, Stern, Rivera, Borofsky, Bechis, Hsi Drafting the manuscript: Bhojani, Wollin, El Tayeb, Stern, Borofsky, Bechis Critical revision of the manuscript for scientific and factual content: Bhojani, Wollin, El Tayeb, Stern, Nguyen, Rivera, Borofsky, Canvasser, Bechis, Hsi Statistical analysis: Supervision: Bhojani, Wollin, El Tayeb, Stern, Rivera, Borofsky, Canvasser, Bechis, His © 2024 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Advertisement Copyright & Permissions© 2024 by American Urological Association Education and Research, Inc.Metrics Author Information Naeem Bhojani Corresponding Author: Naeem Bhojani, MD, University of Montreal Division of Urology, Centre Hospitalier de l'Université de Montréal, 900 St Denis R04.442, Montreal, Québec , H2X 0A0, Canada ([email protected]) More articles by this author Daniel Wollin More articles by this author Marawan M. El Tayeb More articles by this author Kymora B. Scotland More articles by this author John Knoedler More articles by this author Karen L. Stern More articles by this author David-Dan Nguyen More articles by this author Marcelino Rivera More articles by this author Michael S. Borofsky More articles by this author Noah Canvasser More articles by this author Seth K. Bechis More articles by this author Ryan S. Hsi More articles by this author Expand All Funding/Support: None. Conflict of Interest Disclosures: Dr Bhojani: Boston Scientific, Olympus; Dr Wollin: Boston Scientific, Aurie; Dr El Tayeb: Boston Scientific, Cook; Dr Scotland: Boston Scientific, Cook, Storz, Advanced MedTech, Ambu; Dr: Boston Scientific, Cook, Coloplast, Ambu, BD, SonoMotion; Dr Rivera: Boston Scientific, Cook; Dr Borofsky: Boston Scientific; Dr Canvasser: Boston Scientific; Dr Bechis: Boston Scientific, Cook, Dornier. Dr Knoedler: The other authors have nothing Stern to disclose. Ethics Statement: Institutional Review Board approval was obtained at each participating site before study recruitment was initiated. All patients provided written informed consent before participation. Author Contributions: Conception and design: Bhojani, Wollin, El Tayeb, Stern, Nguyen, Rivera, Borofsky, Bechis, Hsi Data analysis and interpretation: Bhojani, Wollin, El Tayeb, Borofsky, Canvasser, Bechis, Hsi Data acquisition: Bhojani, Wollin, El Tayeb, Stern, Rivera, Borofsky, Bechis, Hsi Drafting the manuscript: Bhojani, Wollin, El Tayeb, Stern, Borofsky, Bechis Critical revision of the manuscript for scientific and factual content: Bhojani, Wollin, El Tayeb, Stern, Nguyen, Rivera, Borofsky, Canvasser, Bechis, Hsi Statistical analysis: Supervision: Bhojani, Wollin, El Tayeb, Stern, Rivera, Borofsky, Canvasser, Bechis, His Advertisement PDF downloadLoading ...

  PublisherDOI

• Editorial Comment

  The Journal of Urology · 2024-08-22

  editorial1st authorCorresponding

  No AccessJournal of UrologyEditorial Comment22 Aug 2024Editorial Commentis accompanied byRandomized Controlled Trial of Ultrasonic Propulsion–Facilitated Clearance of Residual Kidney Stone Fragments vs Observation Noah Canvasser Noah CanvasserNoah Canvasser Department of Urologic Surgery, UC Davis Medical Center, Sacramento, California View All Author Informationhttps://doi.org/10.1097/JU.0000000000004203AboutFull TextPDF Cite Export CitationSelect Citation formatNLMAMAIEEEACMAPAChicagoMLAHarvardTips on citation downloadDownload citationCopy citation ToolsAdd to favoritesTrack Citations ShareFacebookLinked InTwitterEmail "Editorial Comment." The Journal of Urology, Publish Ahead of Print, pp. REFERENCES 1. . Randomized controlled trial of ultrasonic propulsion–facilitated clearance of residual kidney stone fragments vs observation. J Urol.2024; 212(6):000-000. doi: 10.1097/JU.0000000000004186 Link, Google Scholar 2. . Repeat surgery after ureteroscopic laser lithotripsy with attempted complete extraction of fragments: long-term follow-up. Urology.2015; 85(6):1272-1278. doi: 10.1016/j.urology.2015.03.019 Crossref, Medline, Google Scholar © 2024 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetailsRelated articlesJournal of Urology15 Aug 2024Randomized Controlled Trial of Ultrasonic Propulsion–Facilitated Clearance of Residual Kidney Stone Fragments vs Observation Advertisement Copyright & Permissions© 2024 by American Urological Association Education and Research, Inc.Metrics Author Information Noah Canvasser Department of Urologic Surgery, UC Davis Medical Center, Sacramento, California More articles by this author Expand All Advertisement PDF downloadLoading ...

  PublisherDOI

• Reply by Authors

  The Journal of Urology · 2023-12-15

  article

  No AccessJournal of UrologyAdult Urology15 Dec 2023REPLY BY AUTHORSis a reply to letterEditorial Comment Naeem Bhojani, Daniel Wollin, Marawan M. El Tayeb, Kymora B. Scotland, John Knoedler, Karen L. Stern, David-Dan Nguyen, Marcelino Rivera, Michael S. Borofsky, Noah Canvasser, Seth K. Bechis, and Ryan S. Hsi Naeem BhojaniNaeem Bhojani *Corresponding Author: Naeem Bhojani, MD, University of Montreal Division of Urology, Centre Hospitalier de l'Université de Montréal, 900 St Denis R04.442, Montreal, Québec , H2X 0A0Canada E-mail Address: [email protected] https://orcid.org/0000-0003-2679-2635 Department of Urology, University of Montreal, Montreal, Quebec, Canada , Daniel WollinDaniel Wollin Division of Urology, Department of Surgery, Brigham and Women's Hospital, Boston, Massachusetts , Marawan M. El TayebMarawan M. El Tayeb Department of Urology, Baylor Scott and White Health, Temple, Texas , Kymora B. ScotlandKymora B. Scotland Department of Urology, University of California, Los Angeles, Los Angeles, California , John KnoedlerJohn Knoedler Department of Urology, Penn State University Medical Center, Hershey, Pennsylvania , Karen L. SternKaren L. Stern Department of Urology, Mayo Clinic, Phoenix, Arizona , David-Dan NguyenDavid-Dan Nguyen Division of Urology, Department of Surgery, University of Toronto, Toronto, Ontario, Canada , Marcelino RiveraMarcelino Rivera Department of Urology, Indiana University, Indianapolis, Indiana , Michael S. BorofskyMichael S. Borofsky Department of Urology, University of Minnesota, Minneapolis, Minnesota , Noah CanvasserNoah Canvasser Department of Urologic Surgery, UC Davis Medical Center, Sacramento, California , Seth K. BechisSeth K. Bechis Department of Urology, University of California, San Diego, San Diego, California , and Ryan S. HsiRyan S. Hsi Department of Urology, Vanderbilt University Medical Center, Nashville, Tennessee for the Collaborative for Research in Endourology (CoRE) View All Author Informationhttps://doi.org/10.1097/JU.0000000000003799.02AboutFull TextPDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareFacebookLinked InTwitterEmail "REPLY BY AUTHORS." The Journal of Urology, Publish Ahead of Print, pp. REFERENCE 1. . Prospective multicenter evaluation of pain before and after removal of nonobstructing renal calculi: a CoRE initiative. J Urol. 2024; 211(3):000-000. Google Scholar © 2023 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetailsRelated articlesJournal of Urology15 Dec 2023Editorial Comment Advertisement Copyright & Permissions© 2023 by American Urological Association Education and Research, Inc.Metrics Author Information Naeem Bhojani Department of Urology, University of Montreal, Montreal, Quebec, Canada *Corresponding Author: Naeem Bhojani, MD, University of Montreal Division of Urology, Centre Hospitalier de l'Université de Montréal, 900 St Denis R04.442, Montreal, Québec , H2X 0A0Canada E-mail Address: [email protected] More articles by this author Daniel Wollin Division of Urology, Department of Surgery, Brigham and Women's Hospital, Boston, Massachusetts More articles by this author Marawan M. El Tayeb Department of Urology, Baylor Scott and White Health, Temple, Texas More articles by this author Kymora B. Scotland Department of Urology, University of California, Los Angeles, Los Angeles, California More articles by this author John Knoedler Department of Urology, Penn State University Medical Center, Hershey, Pennsylvania More articles by this author Karen L. Stern Department of Urology, Mayo Clinic, Phoenix, Arizona More articles by this author David-Dan Nguyen Division of Urology, Department of Surgery, University of Toronto, Toronto, Ontario, Canada More articles by this author Marcelino Rivera Department of Urology, Indiana University, Indianapolis, Indiana More articles by this author Michael S. Borofsky Department of Urology, University of Minnesota, Minneapolis, Minnesota More articles by this author Noah Canvasser Department of Urologic Surgery, UC Davis Medical Center, Sacramento, California More articles by this author Seth K. Bechis Department of Urology, University of California, San Diego, San Diego, California More articles by this author Ryan S. Hsi Department of Urology, Vanderbilt University Medical Center, Nashville, Tennessee More articles by this author Expand All Advertisement PDF downloadLoading ...

  PublisherDOI

• The Impact of Bilateral Stone Disease on Patients' Disease Progression and Health-Related Quality of Life

  Journal of Endourology · 2023-09-28 · 8 citations

  article

  Purpose: Patients with recurring kidney stone events can expect significant morbidity and functional impairment. Few studies have evaluated the effect of bilateral kidney stones on disease progression and quality of life. We wanted to determine the association of bilateral stone disease on age of onset, and the impact on number of stone events and individual kidney stone disease-specific health-related quality of life (HRQOL) by analyzing the validated and prospectively collected Wisconsin Stone Quality of Life (WISQOL) database. Materials and Methods: We studied 2906 stone patients from 16 centers in North America after having completed the WISQOL questionnaire from 2014 to 2019. Kidney stone formers were assessed if kidney stones were bilateral or unilateral on imaging. Analysis with a chi-square test compared categorical variables. Bilateral kidney stone disease and its impact on HRQOL were evaluated through a multivariable linear regression model. Results: Of 2906 kidney stone formers, 1340 had unilateral kidney stones and 1566 had bilateral kidney stones. We observed more frequently that patients with bilateral stones had an increased number of depression/anxiety symptoms, renal tubular acidosis, and rheumatoid arthritis (all p < 0.05). Patients with bilateral stones had a younger mean (standard deviation [SD]) age of kidney stone disease onset (37.2 ± 15.8 vs 46.4 ± 15.9 years of age, p < 0.001). Bilateral kidney stone formers had a higher mean (SD) number of stone events (11.3 ± 21.8) than unilateral kidney stone formers (3.0 ± 5.1) (p < 0.001). Within our multivariable analysis, we found that HRQOL was negatively affected by the presence of bilateral stones for kidney stone patients (β = −11.2 [confidence interval: −19.5 to −3.0] points, p < 0.05). Conclusions: Bilateral kidney stone formers had a younger age of kidney stone disease onset and a higher number of stone events compared with unilateral kidney stone disease formers. The presence of bilateral kidney stone disease negatively impacted HRQOL.

  PublisherDOI

Frequent coauthors

• Naeem Bhojani

  Université de Montréal

  51 shared

• Seth K. Bechis

  51 shared

• Jodi Antonelli

  Duke Medical Center

  48 shared

• Kymora B. Scotland

  48 shared

• Vincent G. Bird

  Florida College

  47 shared

• Roger L. Sur

  47 shared

• Thomas Chi

  University of California, San Francisco

  45 shared

• Jaime Landman

  44 shared

Labs

• Urologic SurgeryPI

Awards & honors

• Top Doctor, Sacramento Magazine, 2020, 2021