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Strain gauge, pressure sensor and interventional medical catheter

A strain gauge and sensitive technology, applied in the field of medical devices, can solve problems such as inconvenience in use, achieve the effects of high precision, strong anti-interference ability, and reduce difficulty and surgical risk

Pending Publication Date: 2021-05-21
SHANGHAI MICROPORT EP MEDTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a strain gauge, a pressure sensor and an interventional medical catheter, the strain gauge can quickly reach a stable state, and overcome the fact that the existing strain gauge requires a certain warm-up time to achieve stability The state, the problem of inconvenient use

Method used

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  • Strain gauge, pressure sensor and interventional medical catheter
  • Strain gauge, pressure sensor and interventional medical catheter
  • Strain gauge, pressure sensor and interventional medical catheter

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0036] In this application, "proximal" and "distal" are relative orientations, relative positions, directions of elements or actions relative to each other from the perspective of the physician using the product, although "proximal" and "distal" are not are restrictive, but "proximal" generally refers to the end of the product that is closest to the physician during normal operation, and "distal" generally refers to the end that first enters the patient. "Axial" and "circumferential" refer to the axial direction and the circumferential direction of the elastic body, respectively.

[0037] Such as ...

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Abstract

The invention relates to a strain gauge, a pressure sensor and an interventional medical catheter. The strain gauge comprises a substrate; a transverse sensitive grid arranged on the substrate; the at least two non-transverse sensitive grids respectively arranged on the substrate, positioned on two sides of the transverse sensitive grid respectively and electrically connected with the transverse sensitive grid, wherein the two non-transverse sensitive grids are connected through a transverse connecting line and share a grounding lead and a grounding port, one end of the grounding lead is connected with the connecting line at the middle position of the connecting line, and the other end of the grounding lead is connected with the grounding port; the resistance values of the two non-transverse sensitive grids are the same, the two non-transverse sensitive grids are connected with one ends of two non-grounding leads with the same resistance values respectively, and the other ends of the two non-grounding leads are connected with the two non-grounding ports respectively. According to the invention, the precision of the whole strain gauge is higher, the strain gauge can reach a stable state more quickly after being connected with a circuit, and the anti-interference capability is stronger.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a strain gauge, a pressure sensor and an interventional medical catheter. Background technique [0002] Generally, strain gauges are made by pasting metal sensitive grids on the plastic base film. A metal sensitive grid is formed by a narrow conductor zigzag arrangement to form a group of parallel grid wires. When it is stretched, the sensitive grid becomes narrower. Long, the resistance becomes larger, when it is compressed, the sensitive grid becomes thicker and shorter, and the resistance becomes smaller. In interventional catheters, due to the need to measure the contact between the tip of the catheter and the tissue in the body, it is often necessary to install a pressure sensor at the tip of the catheter, and strain gauges can be used to make such sensors. More specifically, the strain gauges are attached to an elastic On the surrounding wall of the tube body, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/22A61M25/00
CPCG01L1/2262G01L1/2287A61M25/00A61M2025/0002G01B7/16G01L1/2218
Inventor 沈磊王慧周子燕梁波
Owner SHANGHAI MICROPORT EP MEDTECH CO LTD
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