Impact of Weight Loss Due to Sleeve Gastrectomy on Shear Stress of the Femoral Vein in Morbid ObesityReport as inadecuate




Impact of Weight Loss Due to Sleeve Gastrectomy on Shear Stress of the Femoral Vein in Morbid Obesity - Download this document for free, or read online. Document in PDF available to download.

Obesity Surgery

, Volume 24, Issue 5, pp 806–812

First Online: 14 January 2014

Abstract

BackgroundStudies have shown that obesity is associated with venous flow disturbances that lead to changes of the biomechanical forces on the venous wall known as shear stress. We hypothesized that weight loss due to bariatric surgery affects the venous hemodynamics and biomechanical forces on the venous wall. The aim of this study was to evaluate the effects of laparoscopic sleeve gastrectomy LSG on the wall shear stress WSS and the venous hemodynamics of the femoral vein.

MethodsWe studied ten morbidly obese patients who underwent LSG. We investigated venous hemodynamics before, 6 and 12 months after LSG. The femoral vein diameter, cross-sectional area, peak PeakV and maximum TAmax velocities, WSS, and shear rate SR were assessed.

ResultsPeakV and TAmax were significantly lower in the obese patients compared with the control group. WSS and SR were significantly lower in the obese patients compared with the control subjects. Venous hemodynamic parameters increased in the postoperative period at baseline compared with 12 months after surgery: PeakV increased from 17.53 14.25–20.01 cm-s to 25.1 20.9–30.1 cm-s P = 0.04 and the TAmax from 12.97 11.51–14.6 cm-s to 18.46 13.24–24.13 cm-s P = 0.057. WSS significantly increased from 0.21 0.19–0.23 Pa at baseline to 0.31 0.23–0.52 Pa 12 months after surgery P = 0.031. SR also significantly increased from 47.92 43.93–58.55 s at baseline to 76.81 54.04–109.5 s 12 months after surgery P = 0.02.

ConclusionsThis study showed that weight loss due to LSG significantly changes the biomechanical forces on the femoral vein generated by blood flow.

KeywordsObesity Venous wall shear stress Sleeve gastrectomy  Download fulltext PDF



Author: Maciej Wiewiora - Jerzy Piecuch - Marek Glück - Ludmila Slowinska-Lozynska - Krystyn Sosada

Source: https://link.springer.com/article/10.1007/s11695-013-1175-9







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