Ryan S Hsi, M.D.

Assistant Professor

Faculty Appointments
Assistant Professor of Urology
M.D., Loma Linda University, Loma Linda, CaliforniaB.S., Biological Sciences, Stanford University, Stanford, CaliforniaB.A., Chinese, Stanford University, Stanford, California
Office Address
1161 21st Avenue South
A1301 Medical Center North
Nashville, TN 37232
Research Keywords
kidney stones
Clinical Research Keywords
Kidney stones, endourology, minimally-invasive surgery
May PC, Hsi RS, Tran HH, Stoller M, Chew BH, Chi T, Usawachintachit M, Duty BD, Gore JL, Harper JD. The Morbidity of Ureteral Strictures in Patients with Prior Ureteroscopic Stone Surgery: Multi-Institutional Outcomes. J. Endourol [print-electronic]. 2018 Jan 1/12/2018; PMID: 29325445, DOI: 10.1089/end.2017.0657, ISSN: 1557-900X.

Usawachintachit M, Sherer B, Hudnall M, Tzou DT, Taguchi K, Hsi RS, Stoller M, Chi T. Clinical Outcomes for Cystinuria Patients with Unilateral Versus Bilateral Cystine Stone Disease. J. Endourol [print-electronic]. 2018 Jan 1/3/2018; PMID: 29179563, DOI: 10.1089/end.2017.0335, ISSN: 1557-900X.

Tzou DT, Isaacson D, Usawachintachit M, Wang ZJ, Taguchi K, Hills NK, Hsi RS, Sherer BA, Reliford-Titus S, Duty B, Harper JD, Sorensen M, Sur RL, Stoller ML, Chi T. Variation in Radiologic and Urologic Computed Tomography Interpretation of Urinary Tract Stone Burden: Results From the Registry for Stones of the Kidney and Ureter. Urology [print-electronic]. 2018 Jan; 111: 59-64. PMID: 29032235, PII: S0090-4295(17)31073-7, DOI: 10.1016/j.urology.2017.10.002, ISSN: 1527-9995.

Shu X, Cai H, Xiang YB, Li H, Lipworth L, Miller NL, Zheng W, Shu XO, Hsi RS. Nephrolithiasis Among Middle Aged and Elderly Urban Chinese: A Report from Prospective Cohort Studies in Shanghai. J. Endourol [print-electronic]. 2017 Dec; 31(12): 1327-34. PMID: 29048227, PMCID: PMC5734141, DOI: 10.1089/end.2017.0467, ISSN: 1557-900X.

Usawachintachit M, Isaacson DS, Taguchi K, Tzou DT, Hsi RS, Sherer BA, Stoller ML, Chi T. A Prospective Case-Control Study Comparing LithoVue, a Single-Use, Flexible Disposable Ureteroscope, with Flexible, Reusable Fiber-Optic Ureteroscopes. J. Endourol [print-electronic]. 2017 May; 31(5): 468-75. PMID: 28287823, PMCID: PMC5439446, DOI: 10.1089/end.2017.0027, ISSN: 1557-900X.

Hsi RS, Sanford T, Goldfarb DS, Stoller ML. The Role of the 24-Hour Urine Collection in the Prevention of Kidney Stone Recurrence. J. Urol [print-electronic]. 2017 Apr; 197(4): 1084-9. PMID: 27746283, PII: S0022-5347(16)31515-4, DOI: 10.1016/j.juro.2016.10.052, ISSN: 1527-3792.

Hsi RS, Stoller ML. Complete Metabolic Evaluation is Indicated after a First Stone Event: Con. J. Urol [print-electronic]. 2017 Mar; 197(3 Pt 1): 545-7. PMID: 27992753, PII: S0022-5347(16)31960-7, DOI: 10.1016/j.juro.2016.12.028, ISSN: 1527-3792.

Chen L, Hsi RS, Yang F, Sherer BA, Stoller ML, Ho SP. Anatomically-specific intratubular and interstitial biominerals in the human renal medullo-papillary complex. PLoS ONE. 2017; 12(11): e0187103. PMID: 29145401, PMCID: PMC5690653, PII: PONE-D-16-46243, DOI: 10.1371/journal.pone.0187103, ISSN: 1932-6203.

Hsi RS, Ramaswamy K, Ho SP, Stoller ML. The origins of urinary stone disease: upstream mineral formations initiate downstream Randall's plaque. BJU Int [print-electronic]. 2016 Jun 6/16/2016; PMID: 27306864, DOI: 10.1111/bju.13555, ISSN: 1464-410X.

Hsi RS, Stoller ML, Miller NL. Ultrasonography is an Adequate Initial Screening Test for Urinary Calculi. J. Urol [print-electronic]. 2016 Jun 6/14/2016; PMID: 27312317, PII: S0022-5347(16)30598-5, DOI: 10.1016/j.juro.2016.06.019, ISSN: 1527-3792.

Dy GW, Hsi RS, Holt SK, Lendvay TS, Gore JL, Harper JD. National Trends in Secondary Procedures Following Pediatric Pyeloplasty. J. Urol [print-electronic]. 2016 Apr; 195(4 Pt 2): 1209-14. PMID: 26926543, PMCID: PMC4843514, PII: S0022-5347(15)05223-4, DOI: 10.1016/j.juro.2015.11.010, ISSN: 1527-3792.

Harper JD, Cunitz BW, Dunmire B, Lee FC, Sorensen MD, Hsi RS, Thiel J, Wessells H, Lingeman JE, Bailey MR. First in Human Clinical Trial of Ultrasonic Propulsion of Kidney Stones. J. Urol [print-electronic]. 2016 Apr; 195(4P1): 956-64. PMID: 26521719, PMCID: PMC4851928, PII: S0022-5347(15)05151-4, DOI: 10.1016/j.juro.2015.10.131, ISSN: 1527-3792.

Hsi RS, Spieker AJ, Stoller ML, Jacobs DR, Reiner AP, McClelland RL, Kahn AJ, Chi T, Szklo M, Sorensen MD. Coronary Artery Calcium Score and Association with Recurrent Nephrolithiasis: The Multi-Ethnic Study of Atherosclerosis. J. Urol [print-electronic]. 2016 Apr; 195(4P1): 971-6. PMID: 26454103, PMCID: PMC4966606, PII: S0022-5347(15)04919-8, DOI: 10.1016/j.juro.2015.10.001, ISSN: 1527-3792.

Dunmire B, Harper JD, Cunitz BW, Lee FC, Hsi R, Liu Z, Bailey MR, Sorensen MD. Use of the Acoustic Shadow Width to Determine Kidney Stone Size with Ultrasound. J. Urol [print-electronic]. 2016 Jan; 195(1): 171-7. PMID: 26301788, PMCID: PMC4821497, PII: S0022-5347(15)04612-1, DOI: 10.1016/j.juro.2015.05.111, ISSN: 1527-3792.

Lee FC, Hsi RS, Sorensen MD, Paun M, Dunmire B, Liu Z, Bailey M, Harper JD. Renal Vasoconstriction Occurs Early During Shockwave Lithotripsy in Humans. J. Endourol [print-electronic]. 2015 Dec; 29(12): 1392-5. PMID: 26239232, PMCID: PMC4677566, DOI: 10.1089/end.2015.0315, ISSN: 1557-900X.

Hsi RS, Stoller ML. A Spectrum: Nephrocalcinosis-Nephrolithiasis [editorial]. J. Urol [print-electronic]. 2015 Nov; 194(5): 1188-9. PMID: 26279238, PII: S0022-5347(15)04547-4, DOI: 10.1016/j.juro.2015.08.018, ISSN: 1527-3792.

Hsi RS, Holt SK, Gore JL, Lendvay TS, Harper JD. National Trends in Followup Imaging after Pyeloplasty in Children in the United States. J. Urol [print-electronic]. 2015 Sep; 194(3): 777-82. PMID: 25868576, PMCID: PMC4830277, PII: S0022-5347(15)03727-1, DOI: 10.1016/j.juro.2015.03.123, ISSN: 1527-3792.

Dunmire B, Lee FC, Hsi RS, Cunitz BW, Paun M, Bailey MR, Sorensen MD, Harper JD. Tools to improve the accuracy of kidney stone sizing with ultrasound. J. Endourol [print-electronic]. 2015 Feb; 29(2): 147-52. PMID: 25105243, PMCID: PMC4313404, DOI: 10.1089/end.2014.0332, ISSN: 1557-900X.

Maxwell AD, Cunitz BW, Kreider W, Sapozhnikov OA, Hsi RS, Harper JD, Bailey MR, Sorensen MD. Fragmentation of urinary calculi in vitro by burst wave lithotripsy. J. Urol [print-electronic]. 2015 Jan; 193(1): 338-44. PMID: 25111910, PMCID: PMC4384893, PII: S0022-5347(14)04179-2, DOI: 10.1016/j.juro.2014.08.009, ISSN: 1527-3792.

Sorensen MD, Hsi RS, Chi T, Shara N, Wactawski-Wende J, Kahn AJ, Wang H, Hou L, Stoller ML, . Dietary intake of fiber, fruit and vegetables decreases the risk of incident kidney stones in women: a Women's Health Initiative report. J. Urol [print-electronic]. 2014 Dec; 192(6): 1694-9. PMID: 24859445, PMCID: PMC4241174, PII: S0022-5347(14)03618-0, DOI: 10.1016/j.juro.2014.05.086, ISSN: 1527-3792.

Harper JD, Dunmire B, Wang YN, Simon JC, Liggitt D, Paun M, Cunitz BW, Starr F, Bailey MR, Penniston KL, Lee FC, Hsi RS, Sorensen MD. Preclinical safety and effectiveness studies of ultrasonic propulsion of kidney stones. Urology [print-electronic]. 2014 Aug; 84(2): 484-9. PMID: 24975708, PMCID: PMC4304777, PII: S0090-4295(14)00468-3, DOI: 10.1016/j.urology.2014.04.041, ISSN: 1527-9995.

Hsi RS, Holt SK, Gore JL, Harper JD. Trends in followup imaging after adult pyeloplasty. J. Urol [print-electronic]. 2014 May; 191(5): 1357-62. PMID: 24423439, PMCID: PMC4846359, PII: S0022-5347(14)00009-3, DOI: 10.1016/j.juro.2013.12.052, ISSN: 1527-3792.

Macleod LC, Hsi RS, Gore JL, Wright JL, Harper JD. Perinephric fat thickness is an independent predictor of operative complexity during robot-assisted partial nephrectomy. J. Endourol [print-electronic]. 2014 May; 28(5): 587-91. PMID: 24377723, DOI: 10.1089/end.2013.0647, ISSN: 1557-900X.

Hsi RS, Dunmire B, Cunitz BW, He X, Sorensen MD, Harper JD, Bailey MR, Lendvay TS. Content and face validation of a curriculum for ultrasonic propulsion of calculi in a human renal model. J. Endourol [print-electronic]. 2014 Apr; 28(4): 459-63. PMID: 24228719, PMCID: PMC3961775, DOI: 10.1089/end.2013.0589, ISSN: 1557-900X.

Maxwell AD, Hsi RS, Bailey MR, Casale P, Lendvay TS. Noninvasive ureterocele puncture using pulsed focused ultrasound: an in vitro study. J. Endourol [print-electronic]. 2014 Mar; 28(3): 342-6. PMID: 24171441, PMCID: PMC3929044, DOI: 10.1089/end.2013.0528, ISSN: 1557-900X.

Sorensen MD, Chi T, Shara NM, Wang H, Hsi RS, Orchard T, Kahn AJ, Jackson RD, Miller J, Reiner AP, Stoller ML. Activity, energy intake, obesity, and the risk of incident kidney stones in postmenopausal women: a report from the Women's Health Initiative. J. Am. Soc. Nephrol [print-electronic]. 2014 Feb; 25(2): 362-9. PMID: 24335976, PMCID: PMC3904570, PII: ASN.2013050548, DOI: 10.1681/ASN.2013050548, ISSN: 1533-3450.

Hsi RS, Macleod LC, Gore JL, Wright JL, Harper JD. Comparison of selective parenchymal clamping to hilar clamping during robotic-assisted laparoscopic partial nephrectomy. Urology [print-electronic]. 2014 Feb; 83(2): 339-44. PMID: 24246321, PMCID: PMC4843515, PII: S0090-4295(13)01272-7, DOI: 10.1016/j.urology.2013.09.033, ISSN: 1527-9995.

Connors BA, Evan AP, Blomgren PM, Hsi RS, Harper JD, Sorensen MD, Wang YN, Simon JC, Paun M, Starr F, Cunitz BW, Bailey MR, Lingeman JE. Comparison of tissue injury from focused ultrasonic propulsion of kidney stones versus extracorporeal shock wave lithotripsy. J. Urol [print-electronic]. 2014 Jan; 191(1): 235-41. PMID: 23917165, PMCID: PMC3865142, PII: S0022-5347(13)05053-2, DOI: 10.1016/j.juro.2013.07.087, ISSN: 1527-3792.

Hsi RS, Zamora DA, Kanal KM, Harper JD. Severe obesity is associated with 3-fold higher radiation dose rate during ureteroscopy. Urology [print-electronic]. 2013 Oct; 82(4): 780-5. PMID: 23958504, PMCID: PMC4843513, PII: S0090-4295(13)00810-8, DOI: 10.1016/j.urology.2013.06.030, ISSN: 1527-9995.

Sorensen MD, Bailey MR, Hsi RS, Cunitz BW, Simon JC, Wang YN, Dunmire BL, Paun M, Starr F, Lu W, Evan AP, Harper JD. Focused ultrasonic propulsion of kidney stones: review and update of preclinical technology. J. Endourol [print-electronic]. 2013 Oct; 27(10): 1183-6. PMID: 23883117, PMCID: PMC3787400, DOI: 10.1089/end.2013.0315, ISSN: 1557-900X.

Hsi RS, Dearn J, Dean M, Zamora DA, Kanal KM, Harper JD, Merguerian PA. Effective and organ specific radiation doses from videourodynamics in children. J. Urol [print-electronic]. 2013 Oct; 190(4): 1364-9. PMID: 23707437, PMCID: PMC4843507, PII: S0022-5347(13)04360-7, DOI: 10.1016/j.juro.2013.05.023, ISSN: 1527-3792.

Harper JD, Sorensen MD, Cunitz BW, Wang YN, Simon JC, Starr F, Paun M, Dunmire B, Liggitt HD, Evan AP, McAteer JA, Hsi RS, Bailey MR. Focused ultrasound to expel calculi from the kidney: safety and efficacy of a clinical prototype device. J. Urol [print-electronic]. 2013 Sep; 190(3): 1090-5. PMID: 23583535, PMCID: PMC4414252, PII: S0022-5347(13)04029-9, DOI: 10.1016/j.juro.2013.03.120, ISSN: 1527-3792.

Hsi RS, Hotaling JM, Hartzler AL, Holt SK, Walsh TJ. Validity and reliability of a smartphone application for the assessment of penile deformity in Peyronie's disease. J Sex Med [print-electronic]. 2013 Jul; 10(7): 1867-73. PMID: 23551808, PII: S1743-6095(15)30414-8, DOI: 10.1111/jsm.12136, ISSN: 1743-6109.

Hsi RS, Hotaling JM, Moore TN, Joyner BD. Publication misrepresentation among urology residency applicants. World J Urol [print-electronic]. 2013 Jun; 31(3): 697-702. PMID: 22729465, DOI: 10.1007/s00345-012-0895-0, ISSN: 1433-8726.

Hsi RS, Harper JD. Fluoroless ureteroscopy: zero-dose fluoroscopy during ureteroscopic treatment of urinary-tract calculi. J. Endourol [print-electronic]. 2013 Apr; 27(4): 432-7. PMID: 23194092, DOI: 10.1089/end.2012.0478, ISSN: 1557-900X.

Hsi RS, Welty CJ, Sorensen MD, Koreishi AF, Wessells H. Combined partial cystectomy and cesarean delivery in a pregnant female with bladder pheochromocytoma. Can J Urol. 2013 Feb; 20(1): 6646-8. PMID: 23433139, ISSN: 1195-9479.

Sorensen MD, Harper JD, Hsi RS, Shah AR, Dighe MK, Carter SJ, Moshiri M, Paun M, Lu W, Bailey MR. B-mode ultrasound versus color Doppler twinkling artifact in detecting kidney stones. J. Endourol [print-electronic]. 2013 Feb; 27(2): 149-53. PMID: 23067207, PMCID: PMC3573723, DOI: 10.1089/end.2012.0430, ISSN: 1557-900X.

Sorensen MD, Bailey MR, Shah AR, Hsi RS, Paun M, Harper JD. Quantitative assessment of shockwave lithotripsy accuracy and the effect of respiratory motion. J. Endourol [print-electronic]. 2012 Aug; 26(8): 1070-4. PMID: 22471349, PMCID: PMC3412057, DOI: 10.1089/end.2012.0042, ISSN: 1557-900X.

McAllister MW, Hsi RS, Torrey RR, Simmons Z, Baldwin BD, Baldwin DD. In vitro comparison of changes in effective patient weight between purely laparoscopic and hand-assisted laparoscopic surgery. J. Endourol [print-electronic]. 2011 Apr; 25(4): 651-5. PMID: 21438691, DOI: 10.1089/end.2010.0410, ISSN: 1557-900X.

Hsi RS, Hotaling JM, Spencer ES, Bollyky PL, Walsh TJ. Isolated infection of a decommissioned penile prosthesis reservoir with Actinomyces neuii. J Sex Med [print-electronic]. 2011 Mar; 8(3): 923-6. PMID: 21143418, PII: S1743-6095(15)33441-X, DOI: 10.1111/j.1743-6109.2010.02144.x, ISSN: 1743-6109.

Hsi RS, Ojogho ON, Baldwin DD. Analysis of techniques to secure the renal hilum during laparoscopic donor nephrectomy: review of the FDA database. Urology [print-electronic]. 2009 Jul; 74(1): 142-7. PMID: 19406458, PII: S0090-4295(08)01843-8, DOI: 10.1016/j.urology.2008.11.010, ISSN: 1527-9995.

Lamberton GR, Hsi RS, Jin DH, Lindler TU, Jellison FC, Baldwin DD. Prospective comparison of four laparoscopic vessel ligation devices. J. Endourol. 2008 Oct; 22(10): 2307-12. PMID: 18831673, DOI: 10.1089/end.2008.9715, ISSN: 1557-900X.

Hsi RS, Saint-Elie DT, Zimmerman GJ, Baldwin DD. Mechanisms of hemostatic failure during laparoscopic nephrectomy: review of Food and Drug Administration database. Urology [print-electronic]. 2007 Nov; 70(5): 888-92. PMID: 17919695, PII: S0090-4295(07)01798-0, DOI: 10.1016/j.urology.2007.06.1116, ISSN: 1527-9995.