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Multicenter Study
. 2025 May 13;43(1):298.
doi: 10.1007/s00345-025-05656-8.

Prospective multicenter real-world outcomes of Suction Technology Utility in Mini-PCNL Study (STUMPS) in modern-day practice: formulation of the global STUMPS registry on behalf of the endourology section of the European Association of Urology and the suction mini-PCNL collaborative study group

Vineet Gauhar #  1   2 , Daniele Castellani #  3   4 , Jaisukh Kalathia  5 , Amish Mehta  6 , Nariman Gadzhiev  7 , Vigen Malkhasyan  8 , Nitesh Kumar  9 , Rajiv H Kalbit  10 , Ivan Gorgotsky  7 , Mehmet Ilker Gokce  11 , Mahmoud Laymon  12 , Takaaki Inoue  13 , Gopal Ramdas Tak  14 , Abu Baker  15 , Pankaj Dholaria  6 , Arun Chawla  16 , Edgar Beltrán-Suárez  17 , Abhay Mahajan  18 , Khi Yung Fong  19 , Steffi Kar-Kei Yuen  2   20 , Karl Tan  21 , Mohamed Omar  22 , Kremena Petkova  23 , Kazumi Taguchi  24 , Chinnakhet Ketsuwan  25 , Mohamed Amine Lakmichi  26 , Sundaram Palaniappan  19 , Yiloren Tanidir  27 , Nebil Akdogan  28 , Marcos Cepeda  2   29 , Alexey Martov  30 , Zelimkhan Tokhtiyev  30 , Lazaros Tzelves  31 , Andreas Skolarikos  2   31 , Esteban Acuña  32 , Marek Zawadzki  33 , Wissam Kamal  34 , Leonardo Gomes Lopes  35 , Dmitriy Gorelov  36 , Madhu Sudan Agrawal  37 , Chandra Mohan Vaddi  38 , Bhaskar K Somani  2   39 , Thomas R W Herrmann  2   40   41   42
Affiliations
Multicenter Study

Prospective multicenter real-world outcomes of Suction Technology Utility in Mini-PCNL Study (STUMPS) in modern-day practice: formulation of the global STUMPS registry on behalf of the endourology section of the European Association of Urology and the suction mini-PCNL collaborative study group

Vineet Gauhar et al. World J Urol. .

Abstract

Purpose: To present outcomes of a registry to understand the practice patterns, resource utilization, and nuances of suction mini-percutaneous nephron lithotripsy (SM-PCNL).

Methods: Data from 30 centers in 21 countries were prospectively collected (March-November 2024). SM-PCNL was defined as PCNL using a suction nephrostomy sheath of size 14-22 Fr. with any lithotripsy device. There were no instructions on how to perform the surgical procedure. Stone features and stone-free status were assessed using an unenhanced CT scan. Data are presented as median/interquartile range and frequency/proportion.

Results: 1707 patients were included and 42.4% of them were males. Most were first-time stone formers. Median age was 50 years. Median stone volume was 1700 mm3. Surgery was commonly performed using a single access tract (92.9%) and in supine position (56.5%). The fluoroscopy-only puncture was used as the most common access (70.7%), followed by the combination of fluoroscopy and ultrasound (25.1%). Median operation time was 45 min. The most common sheath was Clearpetra (27.8%). Thulium fiber laser was the most frequent energy used (26.2%). A tubeless procedure with a stent was employed in 47.0% of cases. Most common complications were fever managed by observation (7.3%), fever requiring antibiotics (3.3%), blood transfusion (1.1%), and sepsis (0.2%). Median hospitalization was 3 days. 30-day CT scan showed zero fragments in 82.4% of patients. Reintervention was performed in 2.6% of cases.

Conclusions: This registry outlines the various equipment, peri-operative strategies, complications, and outcomes of SM-PCNL performed in real-world practice, providing valuable data on the nuances of performing such surgery.

Keywords: Kidney calculi; Lithotripsy; Percutaneous nephrolithotomy; Sheath; Suction.

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Conflict of interest statement

Declarations. Conflict of interest: The authors declare no competing interests. Human rights: Institutional board review approval was obtained by the leading center (Asian Institute of Nephro-Urology, AINU #01/2024) and the remaining centers had approvals from their Institutional board.

References

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