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Elastomeric moisture barrier for force sensor

A force sensor and sensor technology, applied in the field of elastomer moisture barriers, can solve problems such as pericardial tamponade and puncture

Inactive Publication Date: 2019-10-22
ST JUDE MEDICAL INT HLDG SARL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the other extreme, if the end effector of the catheter contacts the tissue wall with excessive force, it can accidentally puncture the tissue, causing a cardiac tamponade

Method used

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  • Elastomeric moisture barrier for force sensor
  • Elastomeric moisture barrier for force sensor
  • Elastomeric moisture barrier for force sensor

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0061] Example 1 - Inner Polar Layer - Middle Tie Layer - Outer Non-polar Layer

[0062] Inner layer: PEBA copolymer (Arkema 3533SA01)

[0063] Middle layer: maleic anhydride grafted ethylene-butene copolymer (Dow Amplify TM GR209)

[0064] Outer Layer: Olefin Block Copolymer (Dow Infuse TM 9000)

[0065] In the tubular moisture barrier of Example 1, the inner layer can provide an adhesive bond to the outer surface of the force sensor, the distal end of the shaft, and the proximal end of the tip. The outer non-polar layer can act as a moisture barrier. The middle layer can act as a tie layer, allowing the melt bonding of the inner and outer layers of the tubular vapor barrier via coextrusion or layer-to-layer thermal lamination (i.e., reflow soldering), allowing the layered structure to be chemically integrated as an integrated part. Combines without layering.

[0066] Furthermore, the thickness of individual layers can vary. The addition of the outer layers helps...

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Abstract

A medical device can include an elongate shaft extending along a shaft longitudinal axis, which can include a shaft proximal end and a shaft distal end. A force sensor can be disposed on the shaft distal end and can include a sensor proximal end and a sensor distal end. A tip can be disposed on the sensor distal end. A tubular moisture barrier can define a barrier lumen, wherein the tubular moisture barrier extends along the shaft longitudinal axis between the shaft distal end and the tip, and wherein the force sensor is disposed within the barrier lumen.

Description

technical field [0001] This invention relates to elastomeric moisture barriers for force transducers. Background technique [0002] The exploration and treatment of various organs or vessels has been possible for many years using catheter-based diagnostic and therapeutic systems. Such a catheter is introduced through a vessel leading to the lumen of the organ to be explored or treated, or alternatively may be introduced directly through an incision made in the organ wall. In this way, the patient avoids the trauma and prolonged recovery time typically associated with open surgery. [0003] In order to provide effective diagnosis or treatment, it is often necessary to first map the area to be treated with high precision. One disadvantage of such previously known mapping systems is that they rely on manual feedback of the catheter and / or impedance measurements to determine when the catheter is properly positioned in the vessel or organ. These systems do not measure contact ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/00A61B90/00
CPCA61B5/6852A61B5/6885A61B2562/0233A61B2562/06A61B2562/18A61B2090/064A61B5/1076A61B2562/0271A61B5/1079
Inventor 郭小平J·霍姆伯格
Owner ST JUDE MEDICAL INT HLDG SARL