Shanghai Microport Ep Medtech Co., Ltd.

Tao Miao

Hui Wang

Lei Shen

Bo Liang

Yiyong Sun

Mei Wang

Jiahong Tan

A strain gauge (), a pressure sensor (), and an interventional medical catheter. The strain gauge () comprises a substrate () and at least two sensitive gages () provided on the substrate (), the at least two sensitive gages () being arranged along two mutually perpendicular directions and sharing one ground port (). The pressure sensor () comprises an elastic body () and the strain gauge () provided on the elastic body (). The interventional medical catheter comprises a catheter distal end and the pressure sensor () provided at the catheter distal end. The present application not only saves the trace space for mounting and using the strain gauge () on the interventional medical catheter, facilitating the successful mounting and use of the strain gauge () on the interventional medical catheter, improving the adaptability of the strain gauge (), but also reduces the size of the strain gauge (), thereby shortening the length of the elastic body () of the pressure sensor () and reducing the size of the interventional medical catheter.

Strain gauge, pressure sensor, and interventional medical catheter

A strain gauge (), a pressure sensor (), and an interventional medical catheter. The strain gauge () comprises a substrate () and at least two sensitive gages () provided on the substrate (), the at least two sensitive gages () being arranged along two mutually perpendicular directions and sharing one ground port (). The pressure sensor () comprises an elastomer () and the strain gauge () provided on the elastomer (). The interventional medical catheter comprises a catheter distal end and the pressure sensor () provided at the catheter distal end. The present application not only saves the trace space for mounting and using the strain gauge () on the interventional medical catheter, facilitating the successful mounting and use of the strain gauge () on the interventional medical catheter, improving the adaptability of the strain gauge (), but also reduces the size of the strain gauge (), thereby shortening the length of the elastomer () of the pressure sensor () and reducing the size of the interventional medical catheter.

An electrophysiology catheter () includes a catheter distal portion () on which a force sensor () is arranged. The force sensor () includes an elastic tube () and strain gauges (). The elastic tube () has a hollow portion in its wall, and the strain gauges () are disposed external to the hollow portion. Compared to the design with the strain gauges () overlapping the hollow portion, arranging them over solid portions of the elastic tube () allows the strain gauges () to collect more accurate electrical signals while suffering from less interference. This can result in a significant improvement in contact force measurement accuracy of the catheter distal portion ().

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Shanghai, China

Tao Miao