Research Papers: Sensing

Real-time measurement of the vaginal pressure profile using an optical-fiber-based instrumented speculum

[+] Author Affiliations
Luke A. Parkinson, Anthony W. Papageorgiou, John W. Arkwright

Flinders University, Medical Device Research Institute, 1284 South Road, Tonsley, SA 5042, Australia

Caroline E. Gargett, Anna Rosamilia

Hudson Institute of Medical Research, The Ritchie Centre, 27-31 Wright Street, Clayton, VIC 3168, Australia

Monash University, Department of Obstetrics and Gynaecology, 246 Clayton Road, Clayton, VIC 3168, Australia

Natharnia Young

Hudson Institute of Medical Research, The Ritchie Centre, 27-31 Wright Street, Clayton, VIC 3168, Australia

Aditya V. Vashi

CSIRO Manufacturing, Research Way, Clayton, VIC 3168, Australia

Jerome A. Werkmeister

Monash University, Department of Obstetrics and Gynaecology, 246 Clayton Road, Clayton, VIC 3168, Australia

CSIRO Manufacturing, Research Way, Clayton, VIC 3168, Australia

J. Biomed. Opt. 21(12), 127008 (Dec 23, 2016). doi:10.1117/1.JBO.21.12.127008
History: Received August 11, 2016; Accepted November 29, 2016
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Abstract.  Pelvic organ prolapse (POP) occurs when changes to the pelvic organ support structures cause descent or herniation of the pelvic organs into the vagina. Clinical evaluation of POP is a series of manual measurements known as the pelvic organ prolapse quantification (POP-Q) score. However, it fails to identify the mechanism causing POP and relies on the skills of the practitioner. We report on a modified vaginal speculum incorporating a double-helix fiber-Bragg grating structure for distributed pressure measurements along the length of the vagina and include preliminary data in an ovine model of prolapse. Vaginal pressure profiles were recorded at 10 Hz as the speculum was dilated incrementally up to 20 mm. At 10-mm dilation, nulliparous sheep showed higher mean pressures (102±46  mmHg) than parous sheep (39±23  mmHg) (P=0.02), attributable largely to the proximal (cervical) end of the vagina. In addition to overall pressure variations, we observed a difference in the distribution of pressure that related to POP-Q measurements adapted for the ovine anatomy, showing increased tissue laxity in the upper anterior vagina for parous ewes. We demonstrate the utility of the fiber-optic instrumented speculum for rapid distributed measurement of vaginal support.

Figures in this Article
© 2016 Society of Photo-Optical Instrumentation Engineers

Topics

Sensors ; Vagina

Citation

Luke A. Parkinson ; Caroline E. Gargett ; Natharnia Young ; Anna Rosamilia ; Aditya V. Vashi, et al.
"Real-time measurement of the vaginal pressure profile using an optical-fiber-based instrumented speculum", J. Biomed. Opt. 21(12), 127008 (Dec 23, 2016). ; http://dx.doi.org/10.1117/1.JBO.21.12.127008


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