Development of a Novel Mesh Model to Define a New Index "amount of Stone" to Evaluate Calculus and Predicting the Lithotripsy Time

Overview

Journal Int Urol Nephrol

Publisher Springer

Specialty Nephrology

Date 2023 Jul 13

PMID 37440004

Authors

Bingjian Wei

Yang Fu

Aidi Ma

Li Hong

Yunyan Wang

Shuo Gu

Lu Ji

Affiliations

Soon will be listed here.

Abstract

Objective: Develop a mesh model to define a new "index amount of stone" to evaluate calculus and predict lithotripsy time.

Methods: The stones were divided into target units with diameter of 5 mm by the mesh from x, y and z directions, and the cross-sectional areas between units were calculated as amount of stone as a new index to evaluate calculus. Design a prospective study with 112 cases of percutaneous nephrolithotomy to verify the reliability of this index, and to compare the accuracy of the quantity, volume and maximum diameter of stones in predicting the time of lithotripsy.

Results: Amount of stone (Q) is reliable. The lithotripsy time was significantly correlated with the amount of stone, volume and maximum diameter of the stone (p < 0.01). The three regression equations were valid. The linear fit in the amount group was larger than that in the volume group, and further larger than that in the maximum diameter group, with R values of 0.716, 0.661 and 0.471, respectively.

Conclusions: It is more accurate and convenient to use amount of stone to evaluate calculus, which can be used to predict the lithotripsy time.

References

Sorokin I, Mamoulakis C, Miyazawa K, Rodgers A, Talati J, Lotan Y . Epidemiology of stone disease across the world. World J Urol. 2017; 35(9):1301-1320. DOI: 10.1007/s00345-017-2008-6. View

Assimos D, Krambeck A, Miller N, Monga M, Murad M, Nelson C . Surgical Management of Stones: American Urological Association/Endourological Society Guideline, PART I. J Urol. 2016; 196(4):1153-60. DOI: 10.1016/j.juro.2016.05.090. View

De Coninck V, Traxer O . The Time Has Come to Report Stone Burden in Terms of Volume Instead of Largest Diameter. J Endourol. 2018; 32(3):265-266. DOI: 10.1089/end.2017.0886. View

Ozgor F, Simsek A, Binbay M, Akman T, Kucuktopcu O, Sarilar O . Clinically insignificant residual fragments after flexible ureterorenoscopy: medium-term follow-up results. Urolithiasis. 2014; 42(6):533-8. DOI: 10.1007/s00240-014-0691-y. View

Schatloff O, Lindner U, Ramon J, Winkler H . Randomized trial of stone fragment active retrieval versus spontaneous passage during holmium laser lithotripsy for ureteral stones. J Urol. 2010; 183(3):1031-5. DOI: 10.1016/j.juro.2009.11.013. View

Rippel C, Nikkel L, Lin Y, Danawala Z, Olorunnisomo V, Youssef R . Residual fragments following ureteroscopic lithotripsy: incidence and predictors on postoperative computerized tomography. J Urol. 2012; 188(6):2246-51. DOI: 10.1016/j.juro.2012.08.040. View

Emmott A, Brotherhood H, Paterson R, Lange D, Chew B . Complications, Re-Intervention Rates, and Natural History of Residual Stone Fragments After Percutaneous Nephrolithotomy. J Endourol. 2017; 32(1):28-32. DOI: 10.1089/end.2017.0618. View

Canat L, Atalay H, Degirmentepe R, Bayraktarli R, Aykan S, Cakir S . Stone volume measuring methods: Should the CT based three-dimensional-reconstructed algorithm be proposed as the gold standard? What did the three-dimensional printed models show us?. Arch Esp Urol. 2019; 72(6):596-601. View

Jacques S . Laser-tissue interactions. Photochemical, photothermal, and photomechanical. Surg Clin North Am. 1992; 72(3):531-58. DOI: 10.1016/s0039-6109(16)45731-2. View

10.

Ouzaid I, Al-qahtani S, Dominique S, Hupertan V, Fernandez P, Hermieu J . A 970 Hounsfield units (HU) threshold of kidney stone density on non-contrast computed tomography (NCCT) improves patients' selection for extracorporeal shockwave lithotripsy (ESWL): evidence from a prospective study. BJU Int. 2012; 110(11 Pt B):E438-42. DOI: 10.1111/j.1464-410X.2012.10964.x. View

11.

Gucuk A, Uyeturk U, Ozturk U, Kemahli E, Yildiz M, Metin A . Does the Hounsfield unit value determined by computed tomography predict the outcome of percutaneous nephrolithotomy?. J Endourol. 2011; 26(7):792-6. DOI: 10.1089/end.2011.0518. View

12.

Zhong W, Zeng G, Wu K, Li X, Chen W, Yang H . Does a smaller tract in percutaneous nephrolithotomy contribute to high renal pelvic pressure and postoperative fever?. J Endourol. 2008; 22(9):2147-51. DOI: 10.1089/end.2008.0001. View

13.

Marques-Pinto A, Santos-Reis C, Castanheira de Oliveira M, Fraga A, Cavadas V . Prediction models of low-power holmium laser effectiveness in renal stone lithotripsy during retrograde intrarenal surgery. Lasers Med Sci. 2021; 37(3):1873-1880. DOI: 10.1007/s10103-021-03445-4. View

14.

Wang Y, Jiang F, Wang Y, Hou Y, Zhang H, Chen Q . Post-percutaneous nephrolithotomy septic shock and severe hemorrhage: a study of risk factors. Urol Int. 2012; 88(3):307-10. DOI: 10.1159/000336164. View

15.

Okhunov Z, Helmy M, Perez-Lansac A, Menhadji A, Bucur P, Kolla S . Interobserver reliability and reproducibility of s.T.o.N.e. Nephrolithometry for renal calculi. J Endourol. 2013; 27(10):1303-6. DOI: 10.1089/end.2013.0289. View

16.

Chawla S, Chang M, Chang A, LeNoir J, Bagley D . Effectiveness of high-frequency holmium:YAG laser stone fragmentation: the "popcorn effect". J Endourol. 2008; 22(4):645-50. DOI: 10.1089/end.2007.9843. View