Preoperative Prediction of Flexible Ureteroscopy Outcome in the Treatment of Renal Calculi

NCT05857501 | Unknown

• 1 other identifier: FURS outcome prediciton
• Study Type: observational
• Target: 72
• Locations: 0 countries
• Sites: N/A

Brief Summary

To predict the outcome of flexible ureteroscopy in the management of renal stones based on preoperative scoring module using five preoperative parameters that have effect on stone free status postoperatively.

Conditions

Flexible Ureteroscopy

Outcome Measures

Primary Outcomes (1)

• stone free rate after flexible ureteroscopy

  the investigators predict the outcome of flexible ureteroscopy in the management of renal stones based on preoperative scoring module using five preoperative parameters that have effect on stone free rate postoperatively.

  baseline

Interventions

abdominopelvic computerized tomography (CT) without contrast DEVICE

scan combines a series of X-ray images taken from different angles around your body and uses computer processing to create cross-sectional images (slices) of the bones, blood vessels and soft tissues inside your body. CT scan images provide more-detailed information than plain X-rays do.

Also known as: digital KUB (plain x-ray on urology system )

Eligibility Criteria

• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Patients with renal stones that are \< 2 cm in maximal diameter will be recruited to the study. Patients will be counseled for flexible ureteroscopy, and the procedure will be explained to them with discussion about its pros and cons. Patients agreeable to enrollment will sign an informed written consent after fulfillment of ethical approval forms.Stone free rate will be assessed at one week, one month, and three months post-operatively using Plain X-ray for radio-opaque stones and NCCT for radiolucent stones. Stone free rate will be determined by no stone fragment \> 4mm. Number of ancillary procedures required to reach SF will be reported

You may qualify if:

• Renal stones (≤ 2 cm)
• Radiolucent stone resistant to SWL and oral chemical dissolution treatment (≤2cm)

You may not qualify if:

• Large stones (\> 2 cm).
• Staghorn stone (stone involving the renal pelvis and more than two calyces).
• Patient preference of other treatment modality

Sponsors & Collaborators

• Menoufia University: lead

Related Publications (19)

• Preminger GM, Tiselius HG, Assimos DG, Alken P, Buck C, Gallucci M, Knoll T, Lingeman JE, Nakada SY, Pearle MS, Sarica K, Turk C, Wolf JS Jr; EAU/AUA Nephrolithiasis Guideline Panel. 2007 guideline for the management of ureteral calculi. J Urol. 2007 Dec;178(6):2418-34. doi: 10.1016/j.juro.2007.09.107. No abstract available.

  PMID: 17993340 BACKGROUND

• Tiselius HG, Ackermann D, Alken P, Buck C, Conort P, Gallucci M; Working Party on Lithiasis, European Association of Urology. Guidelines on urolithiasis. Eur Urol. 2001 Oct;40(4):362-71. doi: 10.1159/000049803.

  PMID: 11713390 BACKGROUND

• El-Nahas AR, Ibrahim HM, Youssef RF, Sheir KZ. Flexible ureterorenoscopy versus extracorporeal shock wave lithotripsy for treatment of lower pole stones of 10-20 mm. BJU Int. 2012 Sep;110(6):898-902. doi: 10.1111/j.1464-410X.2012.10961.x. Epub 2012 Feb 28.

  PMID: 22372915 BACKGROUND

• Cohen J, Cohen S, Grasso M. Ureteropyeloscopic treatment of large, complex intrarenal and proximal ureteral calculi. BJU Int. 2013 Mar;111(3 Pt B):E127-31. doi: 10.1111/j.1464-410X.2012.11352.x. Epub 2012 Jul 3.

  PMID: 22757752 BACKGROUND

• Pearle MS, Lingeman JE, Leveillee R, Kuo R, Preminger GM, Nadler RB, Macaluso J, Monga M, Kumar U, Dushinski J, Albala DM, Wolf JS Jr, Assimos D, Fabrizio M, Munch LC, Nakada SY, Auge B, Honey J, Ogan K, Pattaras J, McDougall EM, Averch TD, Turk T, Pietrow P, Watkins S. Prospective randomized trial comparing shock wave lithotripsy and ureteroscopy for lower pole caliceal calculi 1 cm or less. J Urol. 2008 May;179(5 Suppl):S69-73. doi: 10.1016/j.juro.2008.03.140.

  PMID: 18405758 BACKGROUND

• Akman T, Binbay M, Ozgor F, Ugurlu M, Tekinarslan E, Kezer C, Aslan R, Muslumanoglu AY. Comparison of percutaneous nephrolithotomy and retrograde flexible nephrolithotripsy for the management of 2-4 cm stones: a matched-pair analysis. BJU Int. 2012 May;109(9):1384-9. doi: 10.1111/j.1464-410X.2011.10691.x. Epub 2011 Oct 28.

  PMID: 22093679 BACKGROUND

• Breda A, Ogunyemi O, Leppert JT, Schulam PG. Flexible ureteroscopy and laser lithotripsy for multiple unilateral intrarenal stones. Eur Urol. 2009 May;55(5):1190-6. doi: 10.1016/j.eururo.2008.06.019. Epub 2008 Jun 13.

  PMID: 18571315 BACKGROUND

• Breda A, Ogunyemi O, Leppert JT, Lam JS, Schulam PG. Flexible ureteroscopy and laser lithotripsy for single intrarenal stones 2 cm or greater--is this the new frontier? J Urol. 2008 Mar;179(3):981-4. doi: 10.1016/j.juro.2007.10.083. Epub 2008 Jan 22.

  PMID: 18207179 BACKGROUND

• Takazawa R, Kitayama S, Tsujii T. Successful outcome of flexible ureteroscopy with holmium laser lithotripsy for renal stones 2 cm or greater. Int J Urol. 2012 Mar;19(3):264-7. doi: 10.1111/j.1442-2042.2011.02931.x. Epub 2011 Dec 6.

  PMID: 22145599 BACKGROUND

• Wiesenthal JD, Ghiculete D, Ray AA, Honey RJ, Pace KT. A clinical nomogram to predict the successful shock wave lithotripsy of renal and ureteral calculi. J Urol. 2011 Aug;186(2):556-62. doi: 10.1016/j.juro.2011.03.109.

  PMID: 21684557 BACKGROUND

• Kanao K, Nakashima J, Nakagawa K, Asakura H, Miyajima A, Oya M, Ohigashi T, Murai M. Preoperative nomograms for predicting stone-free rate after extracorporeal shock wave lithotripsy. J Urol. 2006 Oct;176(4 Pt 1):1453-6; discussion 1456-7. doi: 10.1016/j.juro.2006.06.089.

  PMID: 16952658 BACKGROUND

• Smith A, Averch TD, Shahrour K, Opondo D, Daels FP, Labate G, Turna B, de la Rosette JJ; CROES PCNL Study Group. A nephrolithometric nomogram to predict treatment success of percutaneous nephrolithotomy. J Urol. 2013 Jul;190(1):149-56. doi: 10.1016/j.juro.2013.01.047. Epub 2013 Jan 23.

  PMID: 23353048 BACKGROUND

• Imamura Y, Kawamura K, Sazuka T, Sakamoto S, Imamoto T, Nihei N, Suzuki H, Okano T, Nozumi K, Ichikawa T. Development of a nomogram for predicting the stone-free rate after transurethral ureterolithotripsy using semi-rigid ureteroscope. Int J Urol. 2013 Jun;20(6):616-21. doi: 10.1111/j.1442-2042.2012.03229.x. Epub 2012 Nov 19.

  PMID: 23163835 BACKGROUND

• Resorlu B, Unsal A, Gulec H, Oztuna D. A new scoring system for predicting stone-free rate after retrograde intrarenal surgery: the "resorlu-unsal stone score". Urology. 2012 Sep;80(3):512-8. doi: 10.1016/j.urology.2012.02.072. Epub 2012 Jul 26.

  PMID: 22840867 BACKGROUND

• Jung JW, Lee BK, Park YH, Lee S, Jeong SJ, Lee SE, Jeong CW. Modified Seoul National University Renal Stone Complexity score for retrograde intrarenal surgery. Urolithiasis. 2014 Aug;42(4):335-40. doi: 10.1007/s00240-014-0650-7. Epub 2014 Mar 13.

  PMID: 24623504 BACKGROUND

• Molina WR, Kim FJ, Spendlove J, Pompeo AS, Sillau S, Sehrt DE. The S.T.O.N.E. Score: a new assessment tool to predict stone free rates in ureteroscopy from pre-operative radiological features. Int Braz J Urol. 2014 Jan-Feb;40(1):23-9. doi: 10.1590/S1677-5538.IBJU.2014.01.04.

  PMID: 24642147 BACKGROUND

• Ito H, Sakamaki K, Kawahara T, Terao H, Yasuda K, Kuroda S, Yao M, Kubota Y, Matsuzaki J. Development and internal validation of a nomogram for predicting stone-free status after flexible ureteroscopy for renal stones. BJU Int. 2015 Mar;115(3):446-51. doi: 10.1111/bju.12775. Epub 2014 Aug 13.

  PMID: 24731157 BACKGROUND

• Ito H, Kawahara T, Terao H, Ogawa T, Yao M, Kubota Y, Matsuzaki J. Utility and limitation of cumulative stone diameter in predicting urinary stone burden at flexible ureteroscopy with holmium laser lithotripsy: a single-center experience. PLoS One. 2013 Jun 4;8(6):e65060. doi: 10.1371/journal.pone.0065060. Print 2013.

  PMID: 23750229 BACKGROUND

• Ito H, Kawahara T, Terao H, Ogawa T, Yao M, Kubota Y, Matsuzaki J. The most reliable preoperative assessment of renal stone burden as a predictor of stone-free status after flexible ureteroscopy with holmium laser lithotripsy: a single-center experience. Urology. 2012 Sep;80(3):524-8. doi: 10.1016/j.urology.2012.04.001. Epub 2012 Jun 1.

  PMID: 22658621 BACKGROUND

Study Officials

• Mohamed Abdelgaber Selim, ASS-PROF

  menofia universtiy

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Islam Mohamed Abu-Bakr Mansour, M.B.B.Ch

CONTACT

201069121037; islam_mansour@med.menofia.edu.eg

Mohamed Abdelgaber Selim, ASS-PROF

CONTACT

201066812765; mohamed.abdelgaber@med.menofia.edu.eg

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Teaching Assistant

Study Record Dates

• First Submitted: April 10, 2023
• First Posted: May 12, 2023
• Study Start: May 10, 2023
• Primary Completion: January 1, 2024
• Study Completion: April 1, 2024
• Last Updated: May 12, 2023

Record last verified: 2023-05