Roshan M Patel

Picture of Roshan M Patel
Assistant Clinical Professor, Urology
School of Medicine
Director, Kidney Stone Center
Chief, Division of Endourology
Phone: (714) 456-6849
University of California, Irvine
333 City Blvd West
Suite 2100
Orange, CA 92868
Research Interests
Minimally invasive surgery; robotic surgery; kidney cancer; kidney stones
Available Technologies
1. Konda V, Huo D, Hermes G, Liu M, Patel R, Rubin DT. Do patients with inflammatory bowel disease want genetic testing?
Inflammatory Bowel Diseases. 2006 Jun; 12(6): 497-502.

2. Patel RM, Okhunov Z, Kaler K, Clayman RV. Aftermath of Grade 3 Ureteral Injury from Passage of a Ureteral Access Sheath: Disaster or Deliverance?
Journal of Endourology Case Reports. 2016 Oct 1; 2(1): 169-71.

3. Martin JW, Patel RM, OKhunov Z, Vyas A, Vajgrt D, Clayman RV. Multipoint Thermal Sensors Associated with Improved Oncologic Outcomes Following Cryoablation.
Journal of Endourology. 2017 Apr; 31(4): 355-360.

4. Patel RM, Okohunov Z, Clayman RV, Landman J. Prone Versus Supine Percutaneous Nephrolithotomy: What is Your Position?
Current Urology Reports. 2017 Apr; 18(4): 26.
5. Dutta R, Yoon R, Patel RM, Spradling K, Okhunov Z, Sohn W, Lee HJ, Landman J, Clayman RV. Clinical Comparison of Conventional and Mobile Endockscope Videocystoscopy Using an Air or Fluid Medium.
Journal of Endourology. 2017 Jun; 31(6): 593-597.

6. Labadie B, Patel RM, Gandy Labadie J, Hwang C, Okhunov Z, Landman J. Assessing the Effect of an Intensive 2-Week Surgical Training and Innovation Program for High-School Students.
Journal of Surgical Education. 2017 Jun 15. pii: S1931-7204(17)30092-02.

7. Safiullah S, Patel R, Uribe B, Spradling K, Lall C, Zhang L, Okhunov Z, Clayman RV, Landman J. Prevalence of Protective Shielding Utilization for Radiation Dose Reduction in adult Patients Undergoing Body Scanning Using Computed Tomography.
Journal of Endourology. 2017 Aug 14.

8. Huynh, L, Huang, E, Patel R, Okhunov Z. Predictability and Practicality of Image-Based Scoring Systems for Patient Assessment and Outcome Stratification during Percutaneous Nephrolithotomy: A Contemporary Update
Current Reviews in Urology. 2017 Oct 18;18(12):95.

9. Owyong M, Patel RM, Landman J, Clayman RV. Science Mandates Precision: A Plea for Accuracy in Reporting.
Journal of Urology. 2017 Oct 21. pii: S0022-5347(17)77776-2.

10. Lama DJ, Owyong M, Parkhomenko E, Patel RM, Landman J, Clayman RV. Fluid Dynamic Analysis of Hand-Pump Infuser and Uromat Endoscopic Automatic System for Irrigation Through a Flexible Ureteroscope.
Journal of Endourology. 2018 May; 32(5):431-436. PMID: 29334778

11. Kaler KS, Parkhomenko E, Okunohov Z, Patel RM, Landman J, Clayman RV, Uribe C. Ureteroscopic Holmium Laser-Assisted Retrograde Nephrostomy Access: A Novel Approach to Percutaneous Stone Removal
World Journal of Urology. 2018 Jun; 36(6):963-969. PMID: 29423876

12. Clayman RV, Patel RM, Pearle M. “Stone Trees”: Metabolic Evaluation and Medical Treatment of the Urolithiasis Patient Made Easy.
Journal of Endourology. 2018 May; 32(5):387-392.PMID: 29444590

13. Okhunov Z, Yoon R, Lusch A, Spradlin K, Suarez M, Kaler KS, Patel R, Hwang C, Osann K, Huang J, Lee T, Landman J. Evaluation and Comparison of Contemporary Energy-Based Surgical Vessel Sealing Devices.
Journal of Endourology 2018 Apr; 32(4):329-337. PMID: 29463122

14. Lama DJ, Safiullah S, Patel RM, Lee TK, Balani JP, Zhang L, Okhunov Z, Margulis V, Savage SJ, Uchio E, Landman J. Multi-Institutional Evaluation of Upper Urinary Tract Biopsy Using Backloaded Cup Biopsy Forceps, a Nitinol Basket, and Standard Cup Biopsy Forceps.
Urology. Jul;117:89-94.

15. Yoon R, Capretz T, Patel RM, Okhunov Z, Landman J, Clayman RV. Global Survey of a Novel Smartphone Mobile Endoscopy System.
Journal of Endourology. 2018 May;32(5):451-454.

16. Abedi, G, Patel RM, Lin C, Clayman RV. Quarter Century Management of Chronic Ureteropelvic Junction Obstruction in a Solitary Kidney with a Ureteral Stent.
Journal of Endourology Case Reports. 2018 Apr 1;4(1):42-44

17. Capretz T, Patel RM, Okhunov Z. Percutaneous Renal Biopsy: Approach, Diagnostic Accuracy, and Risks.
Current Opinion in Urology. 2018 Jul;28(4):369-374.

18. Safiullah S, Lama DJ, Patel R, Clayman, RV. Procedural Module: Flexible Cystoscopy.
Journal of Endourology, 2018 May;32(S1):S2-S6.

19. Kaler KS, Safiullah S, Lama DJ , Parkhomenko E, Okhunov Z, Ko YH, Patel RM, Landman J, Clayman RV. Medical impulsive therapy (MIT): the impact of 1 week of preoperative tamsulosin on deployment of 16-French ureteral access sheaths without preoperative ureteral stent placement.
World Journal of Urology. 2018 May 25. doi: 10.1007/s00345-018-2336-1. [Epub ahead of print]

20. Patel RM, Parkhomenko E, Kaler KS, Okhunov Z, Clayman RV, Landman J. Renal Mass Biopsy: An Oncological Conundrum.
Current Opinion in Urology. 2018 Jul;28(4):360-363.

21. Tse C, Patel RM, Yoon R, Landman J, Clayman, RV. The Endockscope Using Next Generation Smartphones: “A Global Opportunity”
Journal of Endourology. 2018 Aug;32(8):765-770.

22. Patel RM, Safiullah S, Okhunov Z, Meller D, Osann KE, Kaler KS, Landman J, Clayman RV. Pretreatment Diagnosis of the Small Renal Mass: Status of Renal Biopsy in the U.S.A.
Journal of Endourology. 2018 Sep 12;32(9):884-890.

23. Patel RM, Walia AS, Grohs E, Okhunov Z, Landman J, Clayman RV. The Effect of Positioning on Ureteral Stone Retropulsion: “Gravity Works.”
British Journal of Urology International. 2018 Aug 10. doi: 10.1111/bju.14510. [Epub ahead of print]

24. Parkhomenko E, Yoon R, Okhunov Z, Patel RM, Dolan B, Kaler KS, Schwartz MJ, Shah PH, Bierwiler H, Multi-Institutional Evaluation of Producing and Testing a Novel 3D-Printed Laparoscopic Trainer: The UCi Trainer Project.
Urology. 2018 November 9. Pii: S0090-4295 (18)30625-3.

25. Parkhomenko E, O’Leary M, Safiullah S, Walia S, Owyong M, Lin C, James R, Okhunov Z, Patel RM, Kaler KS, Landman J, Clayman R. Pilot Assessment of Immersive Virtual Reality Renal Models as an Educational and Preoperative Planning Tool for Percutaneous Nephrolithotomy.
J Endourol. 2018 Dec 21. doi: 10.1089/end.2018.0626. [Epub ahead of print]

26. Patel RM, Jiang P, Asplin J, Granja I, Osann K, Landman J, Clayman, RV. Coconut Water: An Unexpected Source of Urinary Citrate.
Biomed Res Int. 2018 Nov 1;2018:3061742.

27. Kaler KS, Parkhomenko E, Lin CY, Valley ZA, Kim WK, Okhunov Z, Patel RM, Landman J. A New Twist on an Old Technique: Lawson Retrograde Endoscopic-Guided Nephrostomy Access for Percutaneous Nephrolithotomy in Prone Split-Leg Position.
J Endourol Case Rep. 2018 Nov 29;4(1):190-194. PMID: 30515460

28. Okhunov Z, Safiullah S, Patel RM, Juncal S, Garland H, Khajeh N, Cottone C, Capretz T, Martin J, Jordan M, McDougall E, Clayman RV, Landman J. Evaluation of Urology Residency Training and Perceived Resident Abilities in the United States.
Journal of Surgical Education. 2018 PMID: 30803721

29. Kaler KS, Lama DJ, Safiullah S, Cooper V, Valley ZA, O'Leary ML, Patel RM, Klopfer MJ, Li GP, Landman J, Clayman RV. Ureteral Access Sheath Deployment: How much Force Is Too Much? Initial Studies with a Novel Ureteral Access Sheath Force Sensor in the Porcine Ureter.
J Endourol. 2019 Jul 2. doi: 10.1089/end.2019.0211. [Epub ahead of print] PMID: 31161788

30. Kaler KS, Cooper V, O'Leary M, Valley ZA, Lee TK, Patel RM, Landman J, Clayman RV.
Laser Endoscopic X-ray guided Intrarenal Tract (LEXIT): Comparison Among Access Modalities in the Porcine Kidney.
J Endourol. 2019 Jun 11. doi: 10.1089/end.2019.0234. [Epub ahead of print] PMID: 31184211

31. Lu S, Cottone CM, Yoon R, Jefferson FA, Sung JM, Okhunov Z, Tapiero S, Patel RM, Landman J, Clayman RV. Endockscope: A Disruptive Endoscopic Technology.
J Endourol. 2019 Jun 14. doi: 10.1089/end.2019.0252. [Epub ahead of print] PMID: 31195831

32. Okhunov Z, Mao R, Jefferson FJ, Yoon R, Patel RM, Lee TK, Huang J, Zhang Y, Ghoniem G, Landman J. Initial Evaluation of a Novel Modulated Radiofrequency-Based Bladder Denervation Device.
Urology. 2019 Dec;134:237-242. PMID 3159508

33. Tapiero S, Yoon R, Jefferson F, Sung J, Limfueco L, Cottone C, Lu S, Patel RM, Landman J, Clayman RV. Smartphone technology and its applications in urology: a review of the literature.
World J Urol. 2019 Oct 9. doi: 10.1007/s00345-019-02960-y. [Epub ahead of print] PMID: 31598754

34. Jefferson FA, Sung JM, Limfueco L, Lu S, Cottone CM, Tapiero S, Patel RM, Clayman RV, Landman J. Prospective Randomized Comparison of Standard Hand Pump Infuser Irrigation vs an Automated Irrigation Pump During Percutaneous Nephrolithotomy and Ureteroscopy: Assessment of Operating Room Efficiency and Surgeon Satisfaction.
J Endourol. 2020 Feb;34(2):156-162. doi: 10.1089/end.2019.0419. Epub 2019 Nov 20. PMID: 31608653

35. Sung JM, Jefferson FA, Tapiero S, Patel RM, Owyong M, Xie L, Karani R, Ghamarian P, Lall C, Clayman RV, Landman J. Evaluation of a Diuresis Enhanced Non-Contrast Computed Tomography for Kidney Stones Protocol to Maximize Collecting System Distention.
J Endourol. 2020 Mar;34(3):255-261. doi: 10.1089/end.2019.0719. Epub 2020 Mar 3. PMID: 31984761

36. Patel RM, Limfueco L, Tapiero S, O’Leary M, Cooper V, Parkhomenko E, Kaler KS, Okhunov Z, Regan D, Landman J, Clayman RV. Ureteroscopic Doppler Ultrasonography: Mapping Renal Blood Flow From Within the Collecting System.
J Endourol. 2020 Mar 25 doi: 10.1089/end.2019.0884. [Epub ahead of print] PMID: 32212863
Professional Societies
American Urological Society
Endourological Society
Graduate Programs
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