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International Urogynecology Journal
Published in: International Urogynecology Journal 10/2013

01-10-2013 | Original Article

Design and development of a novel intra-vaginal pressure sensor

Authors: Jennifer Kruger, Lynsey Hayward, Poul Nielsen, Denis Loiselle, Robert Kirton

Published in: International Urogynecology Journal | Issue 10/2013

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Abstract

Introduction and hypothesis

The influence of intra-abdominal pressure (IAP) on prolapse development is poorly understood. Nonetheless, chronic cough, high BMI, or heavy lifting predisposes women to pelvic organ prolapse (POP). This study aims to develop and test a novel, wireless intra-vaginal pressure sensor (IVPS) to quantify intra-abdominal pressure changes across a range of well-defined activities.

Methods

The IVPS shape was based on silicone moulds of the vagina and was designed to sit in the proximal vagina. It is thin, compliant and negligibly distorts the surrounding tissues. Repeatability was assessed in 14 volunteers performing three sets of activities (cycles). Each cycle consisted of 18 activities. The IVPS was removed and reinserted after completing either the first or second of the three-cycle exercise routine (order). Participants independently inserted and removed the device. A nested split-plot, factorial ANOVA determined the effect of order using mean IAP increase (mean) and peak-to-peak fluctuations in IAP (amplitude) as dependent variables. Descriptive analysis examined the relative change in IAP across the activities. Cronbach’s alpha ®) determined repeatability.

Results

All women found the IVPS comfortable and easy to insert. There was excellent correlation between cycles across all variables, r > 0.935 (mean) and r > 0.964 (amplitude). The order was not statistically significant, demonstrating a highly repeatable measurement.

Conclusion

This is the first device to measure IAP at high frequency with the freedom of a wireless system. The IVPS aims to provide information to advise women better on suitable pre- and post-operative activities.
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Metadata
Title
Design and development of a novel intra-vaginal pressure sensor
Authors
Jennifer Kruger
Lynsey Hayward
Poul Nielsen
Denis Loiselle
Robert Kirton
Publication date
01-10-2013
Publisher
Springer London
Published in
International Urogynecology Journal / Issue 10/2013
Print ISSN: 0937-3462
Electronic ISSN: 1433-3023
DOI
https://doi.org/10.1007/s00192-013-2097-8

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