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- Title
A low or high BMI is a risk factor for renal hematoma after extracorporeal shock wave lithotripsy for kidney stones.
- Authors
Nussberger, Fabio; Roth, Beat; Metzger, Tobias; Kiss, Bernhard; Thalmann, George; Seiler, Roland
- Abstract
The purpose of this study was to evaluate risk factors for renal hematoma after extracorporeal shock wave lithotripsy (SWL) for kidney stones in a matched case-control analysis of a subgroup of patients recruited from a prospective randomized cohort. Between 06/2010 and 03/2013, 418 patients underwent SWL with the MODULITH-SLX-F2-lithotripter for kidney stones. In 39/418 patients (9 %), ultrasound at post-treatment day 1 revealed renal hematomas. For 37 of these patients, a matched group without hematoma could be selected according to the following matching criteria: age, gender, number and energy of shock waves, stone burden and localization. Risk factors for renal hematoma after SWL were compared between the two groups. The rates of diabetes, stopped anticoagulant/antiplatelet medications and arterial hypertension were not different between the two groups ( p > 0.2). The skin-kidney distance was virtually the same in both groups ( p = 0.5). In the hematoma group, significantly more patients had a high (>30: n = 16) as well as a low (<21.5: n = 4) BMI when compared to the control group ( n = 4; n = 0; p < 0.001). Importantly, all patients with BMI <21.5 developed renal hematomas after SWL. Patients with a high (>30) or low (<21.5) BMI had a higher risk for renal damage after SWL. Therefore, alternative endoscopic treatment options should be considered in these patients.
- Subjects
BODY mass index; EXTRACORPOREAL shock wave lithotripsy; KIDNEY stones; HEMATOMA; ANTICOAGULANTS
- Publication
Urolithiasis, 2017, Vol 45, Issue 3, p317
- ISSN
2194-7228
- Publication type
Article
- DOI
10.1007/s00240-016-0915-4