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Novel positive-pressure joint

A crimping head and a new type of technology, applied in the field of medical supplies, can solve problems such as manual needle extraction, high resilience of the elastic structure, and no improvement in the probability of blockage, and achieve the effect of increasing production difficulty and simple design.

Active Publication Date: 2013-09-04
ZHEJIANG KANGTAI MEDICAL DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual use of positive pressure joints, the probability of blockage has not improved at all, and it is even worse than manual needle removal. Subsequent generation of negative pressure, leading to bleeding and blockage

Method used

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  • Novel positive-pressure joint
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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] Such as figure 1 As shown, the new positive pressure joint includes a shell 1, an inner shaft 2 and an elastic body 3, the inner wall of the shell 1 has threads 11, and the outer wall of the inner shaft 2 has bumps 21.

[0016] Such as figure 2 As shown, when the cone head 4 is inserted during infusion, the convex point 21 of the inner shaft 2 will spirally retreat along the outer shell thread 11, and at the same time, the inner shaft 2 will retreat as a whole, and the elastic body 3 will be compressed.

[0017] When the infusion is completed, the cone head 4 is pulled out, and the elastic body 3 rebounds, driving the inner shaft 2 to move forward. Since the convex point 21 of the inner shaft 2 must advance helically along the shell thread 11, the overall forward movement of the inner shaft 2 is effectively limited. Moving speed, to avoid impact rebound effec...

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Abstract

The invention relates to a novel positive-pressure joint. Mutually matched spiral motion guiding structures are arranged on the contacting portions of an inner shaft and an outer shell, so that local spiral motion is generated. Therefore, when the inner shaft is restored to an original position from a compression position, speed is effectively reduced, the striking rebounding effect commonly existing in a traditional positive-pressure joint is eliminated and negative-pressure backflow of blood is avoided. The novel positive-pressure joint is simple in structure, free of addition of components and obvious in effect.

Description

technical field [0001] The invention relates to a medical product, in particular to a novel positive pressure joint. Background technique [0002] Devices such as indwelling needles, central venous catheters, peripheral central venous catheters, and infusion ports that are long-term indwelling in the human blood circulation system can perform multiple administrations, avoid repeated punctures, and reduce patient pain and body damage. They are the future of infusion therapy. development trend. However, after each infusion, if the needle tube or cone head is directly pulled out from the indwelling device, a cavity will be formed, resulting in negative pressure, causing blood to flow back into the indwelling device, forming thrombus blockage, and causing the indwelling device to be scrapped. [0003] In this regard, the nursing operation standard requires that when the needle is pulled out, the injection should be injected slowly while pulling out the needle, and the indwellin...

Claims

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Application Information

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IPC IPC(8): A61M5/14A61M5/36
Inventor 杨舟
Owner ZHEJIANG KANGTAI MEDICAL DEVICES
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