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Flexible Distributed Pressure Sensing Strip for a Urethral Catheter.
J Microelectromech Syst 2015; 24(6):1840-1847JM

Abstract

A multi-sensor flexible strip is developed for a urethral catheter to measure distributed pressure in a human urethra. The developed sensor strip has important clinical applications in urodynamic testing for analyzing the causes of urinary incontinence in patients. There are two major challenges in the development of the sensor. First, a highly sensitive sensor strip that is flexible enough for urethral insertion into a human body is required and second, the sensor has to work reliably in a liquid in-vivo environment in the human body. Capacitive force sensors are designed and micro-fabricated using polyimide/PDMS substrates and copper electrodes. To remove the parasitic influence of urethral tissues which create fringe capacitance that can lead to significant errors, a reference fringe capacitance measurement sensor is incorporated on the strip. The sensing strip is embedded on a catheter and experimental in-vitro evaluation is presented using a bench-top pressure chamber. The sensors on the strip are able to provide the required sensitivity and range. Preliminary experimental results also show promise that by using measurements from the reference parasitic sensor on the strip, the influence of parasitics from human tissue on the pressure measurements can be removed.

Authors+Show Affiliations

Department of Mechanical Engineering, University of Minnesota, Twin Cities, MN 55455.Department of Mechanical Engineering, University of Minnesota, Twin Cities, MN 55455.Department of Urology, University of Minnesota, Twin Cities, MN 55455.Department of Mechanical Engineering, University of Minnesota, Twin Cities, MN 55455.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27065719

Citation

Ahmadi, Mahdi, et al. "Flexible Distributed Pressure Sensing Strip for a Urethral Catheter." Journal of Microelectromechanical Systems : a Joint IEEE and ASME Publication On Microstructures, Microactuators, Microsensors, and Microsystems, vol. 24, no. 6, 2015, pp. 1840-1847.
Ahmadi M, Rajamani R, Timm G, et al. Flexible Distributed Pressure Sensing Strip for a Urethral Catheter. J Microelectromech Syst. 2015;24(6):1840-1847.
Ahmadi, M., Rajamani, R., Timm, G., & Sezen, A. S. (2015). Flexible Distributed Pressure Sensing Strip for a Urethral Catheter. Journal of Microelectromechanical Systems : a Joint IEEE and ASME Publication On Microstructures, Microactuators, Microsensors, and Microsystems, 24(6), pp. 1840-1847.
Ahmadi M, et al. Flexible Distributed Pressure Sensing Strip for a Urethral Catheter. J Microelectromech Syst. 2015;24(6):1840-1847. PubMed PMID: 27065719.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Flexible Distributed Pressure Sensing Strip for a Urethral Catheter. AU - Ahmadi,Mahdi, AU - Rajamani,Rajesh, AU - Timm,Gerald, AU - Sezen,A S, Y1 - 2015/11/25/ PY - 2016/4/12/entrez PY - 2016/4/12/pubmed PY - 2016/4/12/medline KW - capacitive sensors KW - catheter pressure sensors KW - in vivo force sensors KW - in vivo sensors KW - instrumented catheter KW - parasitic capacitance KW - urethral sensors SP - 1840 EP - 1847 JF - Journal of microelectromechanical systems : a joint IEEE and ASME publication on microstructures, microactuators, microsensors, and microsystems JO - J Microelectromech Syst VL - 24 IS - 6 N2 - A multi-sensor flexible strip is developed for a urethral catheter to measure distributed pressure in a human urethra. The developed sensor strip has important clinical applications in urodynamic testing for analyzing the causes of urinary incontinence in patients. There are two major challenges in the development of the sensor. First, a highly sensitive sensor strip that is flexible enough for urethral insertion into a human body is required and second, the sensor has to work reliably in a liquid in-vivo environment in the human body. Capacitive force sensors are designed and micro-fabricated using polyimide/PDMS substrates and copper electrodes. To remove the parasitic influence of urethral tissues which create fringe capacitance that can lead to significant errors, a reference fringe capacitance measurement sensor is incorporated on the strip. The sensing strip is embedded on a catheter and experimental in-vitro evaluation is presented using a bench-top pressure chamber. The sensors on the strip are able to provide the required sensitivity and range. Preliminary experimental results also show promise that by using measurements from the reference parasitic sensor on the strip, the influence of parasitics from human tissue on the pressure measurements can be removed. SN - 1057-7157 UR - https://www.unboundmedicine.com/medline/citation/27065719/Flexible_Distributed_Pressure_Sensing_Strip_for_a_Urethral_Catheter_ L2 - https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/27065719/ DB - PRIME DP - Unbound Medicine ER -