dc.contributor.advisor |
Kruger, J |
en |
dc.contributor.advisor |
Kirton, R |
en |
dc.contributor.advisor |
Budgett, D |
en |
dc.contributor.advisor |
Nielsen, P |
en |
dc.contributor.author |
Arora, Anuprita |
en |
dc.date.accessioned |
2013-03-21T19:46:29Z |
en |
dc.date.issued |
2013 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/20325 |
en |
dc.description |
Full text is available to authenticated members of The University of Auckland only. |
en |
dc.description.abstract |
Pelvic floor dysfunction annually affects 300,000 to 400,000 American women, so severely that they require corrective surgery. Elevated intra-abdominal pressure (IAP) leads to an increase in pelvic floor dysfunction (pelvic organ prolapse and urinary incontinence) but the biophysical mechanisms are poorly understood. Reliable IAP measurement has been limited by the available measurement systems. The current clinical standard of fluid filled rectal catheters with external transducers, suffer from low sampling rates (~30-50 Hz) and artefacts arising from air bubbles, peristalsis and movement of fluid lines. A prototype novel, wireless intra-vaginal pressure sensor (IVPS) has been developed by the Auckland Bioengineering Institute to quantify IAP changes during activities of daily living, including vigorous exercise. The IVPS consists of a fluid filled silicone balloon connected to a Millar pressure sensor and wireless transmitter. The IVPS allows high frequency data capture (2000 Hz) and avoids pressure artefacts that plague the available IAP systems. However, the prototype IVPS has variability in the size and volume of the silicone balloons, which were labour intensive to manufacture. The objective of this study was to improve the usability of the IVPS prototype and evaluate the performance against the intra-rectal catheter in an urodynamic clinic. A mould was designed and developed to streamline production of the silicone balloon, significantly increasing reproducibility and reducing production time (50 fold). The length of the balloon was reduced to minimize interference from pelvic floor muscles. The IVPS and intra-rectal catheter were used during routine urodynamics, and IAP compared during coughs, valsalva manoeuvres, star jumps and marching. Subjects rated the comfort of both devices (0-10 Likert scale, 0 = most comfortable), and chose a device of preference. The IVPS was preferred by 67% of subjects. It proved comfortable (mean comfort score 0.9) and was well retained. Data measured during coughs and valsalva compared favourably. The IVPS provided captured pressure changes with minimal artefacts during vigorous coughs, star jumps and marching. Due to the known limitations, the intra-rectal catheter system was unable to reliably measure IAP changes during star jumps and marching. This is the first wireless system to measure IAP at high frequency. |
en |
dc.publisher |
ResearchSpace@Auckland |
en |
dc.relation.ispartof |
Masters Thesis - University of Auckland |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
en |
dc.rights |
Restricted Item. Available to authenticated members of The University of Auckland. |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.title |
Developing a Novel Wireless Device for Measuring Intra-Abdominal Pressure |
en |
dc.type |
Thesis |
en |
thesis.degree.grantor |
The University of Auckland |
en |
thesis.degree.level |
Masters |
en |
dc.rights.holder |
Copyright: The Author |
en |
pubs.elements-id |
375298 |
en |
pubs.record-created-at-source-date |
2013-03-22 |
en |
dc.identifier.wikidata |
Q112899388 |
|