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Blood return prevention time-controllable filter for medical infusion apparatus and medical infusion apparatus

A filter and blood-return prevention technology, which is applied to hypodermic injection devices, devices introduced into the body, etc., can solve the problems that infusion sets cannot achieve blood-return prevention, medical accident accuracy, unfavorable production applications, etc. Precise, easy-to-manufacture effects

Inactive Publication Date: 2014-08-13
SHANGHAI JINTA MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the fact that the infusion set in the prior art cannot realize the function of preventing blood return, which may easily cause medical accidents, and the infusion set capable of preventing blood return has very high precision requirements and is difficult to manufacture, which is not conducive to the actual situation. Defects in production and application, providing a filter and a medical infusion set with a controllable anti-bleeding time on the medical infusion set

Method used

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  • Blood return prevention time-controllable filter for medical infusion apparatus and medical infusion apparatus
  • Blood return prevention time-controllable filter for medical infusion apparatus and medical infusion apparatus
  • Blood return prevention time-controllable filter for medical infusion apparatus and medical infusion apparatus

Examples

Experimental program
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Effect test

Embodiment 1

[0062] Such as figure 1 , figure 2 and image 3 As shown, the filter on the medical infusion set in this embodiment with controllable anti-bleeding time includes a barrel body 1 and an upper cover 2 and a base 3 that are closely fitted with the barrel body 1 respectively. The upper cover 2 and the base 3 are respectively inserted with a water inlet pipe 21 and a water outlet pipe 31, and a liquid-stopping type hydrophilic pipe with an automatic liquid-stopping function is sealed and fixed between the base 3 and the barrel body 1. filter membrane 4.

[0063] The filter also includes a water storage tank 5 and an infusion channel (not shown in the figure), the water storage tank 5 is fixed inside the barrel body 1, and can store residual medicinal liquid for preventing blood return, and the The above-mentioned infusion channel can be used for conventional infusion, wherein, the liquid-stopping hydrophilic filter membrane 4 is attached to the liquid outlet surface of the infu...

Embodiment 2

[0077] Such as Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that in this embodiment, at least one exhaust hole 11 is provided on the barrel body 1, and the gap between the exhaust hole 11 and the upper cover 2 is The distance is any value between one-third to one-half of the length of the barrel body 1, and the inner wall of the barrel body 1 is provided with a water-blocking and hydrophobic filter film covering the at least one vent hole 11 12. And in this embodiment, the barrel body 1 is neither provided with the at least one exhaust port 22 nor the water-blocking and hydrophobic filter membrane 23 .

[0078] Since the Murphy's tube requires that the liquid level therein must not exceed 1 / 2 to 2 / 3 of the total height of the Murphy's tube, therefore, in the present invention, the at least one exhaust gas outlet is provided on the barrel body 1. hole 11, and the distance between the exhaust hole 11 and the upper cover 2 is any value between ...

Embodiment 3

[0080] Such as Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that in this embodiment, the filter also includes a hollow conduit 9 inserted into the barrel body 1 from the upper cover, and the hollow conduit 9 The distance between the bottom and the upper cover 2 is one-third to one-half of the length of the barrel body 1 , and a water-blocking and hydrophobic filter membrane 91 is provided inside the hollow conduit 9 .

[0081] When there is liquid medicine dripping into the filter, and the liquid medicine in the filter does not reach the height of the at least one vent hole 11, due to the action of the liquid-stop filter membrane 4, the liquid medicine will Firstly, the air in the filter will be squeezed and the medicinal solution will not flow out along the outlet pipe 31 . The air will be discharged through the hollow conduit 9, and when the medicinal liquid reaches the bottom of the hollow conduit 9, it will continue to rise along the holl...

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Abstract

The invention discloses a blood return prevention time-controllable filter for a medical infusion apparatus and the medical infusion apparatus. The filter comprises a barrel body, a water storage tank and an infusion passage, wherein the water storage tank is arranged in the barrel body, and is used for storing residual liquor for preventing blood return; the infusion passage is used for conventional infusion; the water storage tank has a first or second structure; according to the first structure, at least one through hole is formed in the water storage tank, and is provided with a flow limiting passage, so that the residual liquor drips through the flow limiting passage at blood return prevention speed; according to the second structure, at least one through hole is formed in the water storage tank, and a flow limiting tube is connected to the interior of each through hole in a clamping way, and is provided with a hollow flow limiting passage, so that the residual liquor drips through the flow limiting passage at the blood return prevention speed. According to the filter and the medical infusion apparatus, enough time for the slow dripping of the liquor in the water storage tank through the flow limiting passages to overcome blood spreading venous pressure at the end of infusion of the medical infusion apparatus can be ensured, and sufficient time for the prevention of blood return during infusion can further be ensured.

Description

technical field [0001] The invention relates to a filter on a medical infusion set and a medical infusion set with a controllable anti-blood return time. Background technique [0002] There are two types of liquid medicine filters for existing infusion sets. One is a filter for a disposable infusion set. This is a straight filter. , generally placed in front of the venous needle of the infusion set, can only filter particles above 15 microns, the filter membrane is round, and the diameter is generally relatively small, generally not greater than 12.5mm; the other is a precision filter, which can filter 5 For particles above microns, the filter area is generally required to be large enough, generally larger than 350mm 2 , because the area is too large, in order to facilitate production, the precision filter should not be a straight filter, so a horizontal disc structure is used, that is, the upper and lower connecting pipes are parallel to the upper and lower covers of the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/38A61M5/14
Inventor 毛春元
Owner SHANGHAI JINTA MEDICAL
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