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Technical Briefs

Flexible Carbon Nanotube Composite Sensors for Medical Device Application

[+] Author and Article Information
Wade R. Eichhorn

7-SIGMA, Inc.,
Minneapolis, MN 55406

A. Serdar Sezen

St. Cloud State University,
St. Cloud, MN 56301

Manuscript received March 15, 2013; final manuscript received April 24, 2013; published online June 11, 2013. Editor: Arthur G. Erdman.

J. Med. Devices 7(2), 020943 (Jun 11, 2013) (2 pages) Paper No: MED-13-1050; doi: 10.1115/1.4024311 History: Received March 15, 2013; Revised April 24, 2013

Flexible carbon nanotube composite sensors for medical device applications have been developed using small loadings of multi-walled carbon nanotubes dispersed into medical grade liquid silicone rubber for the purpose of measuring stress, strain and load placed on or by a medical device. The sensors may be attached to a medical device or molded within a medical device, such as an expandable balloon.

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Figures

Grahic Jump Location
Fig. 1

(a, b). Two samples of flexible CNT rubber sensors. Sample “a” tensile and strain measurement. Sample “b” molded within an elastic medical balloon device.

Grahic Jump Location
Fig. 2

Piezoresistive response of CNT sensor, mounted to a flexible medical device, stretched several times over 5 mm

Grahic Jump Location
Fig. 3

Piezoresistive response of CNT sensor molded within a medical balloon device. Compressive force applied against soft object, held and released. Repeated 4 times

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