Research Article
In Vivo Btc-2000™ Measurement of Anterior Vaginal Wall Biomechanical Properties in Prolapse Patients Undergoing Surgical Repair
Elizabeth Mosier1, Rachel Jerome1, Xian-Jin Xie1, Charles CJ Chuong2, J Yan1, Robert C Eberhart2,3 and Philippe E Zimmern1*1Department of Urology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
2Department of Bioengineering, University of Texas at Arlington, Arlington, Texas, USA
3Department of Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, USA
- Corresponding Author:
- Philippe E. Zimmern, MD
UT Southwestern Medical Center, TX, USA
Tel: 214-648-9397
E-mail: philippe.zimmern@utsouthwestern.edu
Received date: November 10, 2011; Accepted date: December 05, 2011; Published date: December 07, 2011
Citation: Mosier E, Jerome R, Xie XJ, Chuong CCJ, Yan J, et al. (2011) In Vivo Btc-2000™ Measurement of Anterior Vaginal Wall Biomechanical Properties in Prolapse Patients Undergoing Surgical Repair. J Biotechnol Biomaterial 1:117. doi:10.4172/2155-952X.1000117
Copyright: © 2011 Mosier E, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Abstract
A non-invasive device, the BTC-2000™, used for skin biomechanical measurements, was adapted for vaginal measurements of prolapsed patients, and tested for intra (IaR) and inter-tester (IrR) reliability, in preparation for a clinical measurement series. Following IRB approval, women aged 35 - 85 with symptomatic stage 2-3 anterior vaginal wall prolapse requiring surgical repair were consented. Twenty four consecutive patients were studied. Under anesthesia, the BTC-2000™ with a 10 mm diameter aperture and a suctioning pressure of 150 mmHg was applied to the anterior vaginal wall below the bladder neck, first with the bladder empty and then filled to 300ml. External, suprapubic measurements were taken as controls. All biomechanical parameters displayed by the instrument were assessed for reliability, including: Laxity (mm/%), Elastic Deformation (mm), Modulus (MPa), Energy Absorption (KPa), and Elasticity (mm). Measurements were made in duplicate by the primary surgeon and a separate, randomly chosen tester. Intra-class correlation coefficient (ICC) was calculated to determine IaR and IrR. The feasibility and reliability of all BTC-2000™ measurements was established for this new application. The calculated biomechanical parameters were not statistically different at the two bladder volumes. ICC calculations showed first and second data collections for both IaR and IrR were not statistically different. ICC IaR values were 0.6 or higher, supporting the claim of reliability. IaR and IrR values for the series of secondary testers were less reliable. Demonstrated feasibility and primary operator reliability pave the way for the first detailed in vivo studies of biomechanical properties in this setting.
