Integrated Flexible Thin Film Sensor Around Angiographic Catheter for Flow Detection. (2017)

• Record Type: Journal Article
• Authors: Maji, Debashis; Das, Soumen
• Is Part Of: Procedia technology. Volume 27(2016)
• Page Start: 221
• Page End: 223
• Publication Date: 2017
• Subjects: Flexible sensor -- angiographic catheter -- thin film buckling -- PDMS elastomer -- conformal integration -- stenosis; Technology -- Congresses; Technology -- Periodicals; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Technology; Conference proceedings; Periodicals; 605
• DOI: 10.1016/j.protcy.2017.04.093
• Languages: English
• ISSNs: 2212-0173

Abstract

Abstract: Integration of thin film inorganic sensors over curved surface requires flexibility of the thin film assembly along with the substrate for various applications. In the present study, a micro thin film flow sensor was fabricated over a soft biocompatible PDMS elastomer. A non-planar topology was used for proper orientation of the thin film buckles along the direction of bending along with pre-stretching of the elastomer to account for larger buckles. The resulting sensors demonstrated high flexibility by successfully wrapping around angiographic 2 mm diameter catheter maintaining good electrical continuity. Preliminary flow sensing of a meanderline shaped micro thermal flow sensor was performed using a custom build flow setup for high and low pulsatile flow rates as well as detection of flow abnormalities due to blockage/stenosis formation. The sensors demonstrated significant response to varying degree of blockages at even low flow rates thereby indicating potential application of such sensor for in-vivo catheterial operations.