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Filter with blood return preventing time controllable on medical infusion set and medical infusion set

A technology of filter and infusion set, which is applied in the direction of subcutaneous injection devices and devices introduced into the body, which can solve the problem that the infusion set cannot prevent blood return, and achieve the effect of prolonging the time of preventing blood return and preventing blood return

Active Publication Date: 2013-09-04
SHANGHAI JINTA MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defect that the infusion set in the prior art cannot realize the function of preventing blood return, which may easily cause medical accidents, and provide a filter and a medical filter with controllable anti-blood return time on the medical infusion set. Infusion set

Method used

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  • Filter with blood return preventing time controllable on medical infusion set and medical infusion set
  • Filter with blood return preventing time controllable on medical infusion set and medical infusion set
  • Filter with blood return preventing time controllable on medical infusion set and medical infusion set

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Embodiment 1

[0048] Such as figure 1 , figure 2 and image 3 As shown, the filter with controllable anti-bleeding time on the medical infusion set of this embodiment includes a barrel body 1 and an upper cover 2 and a base 3 that are closely fitted with the barrel body 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-stop filter membrane 4 is sealed and fixed between the base 3 and the barrel body 1 .

[0049] The filter also includes a water storage tank 5, the water storage tank 5 is fixed inside the barrel body 1, the water storage tank 5 is provided with at least one through hole 51, each of the through holes 51 is connected with a The flow control plugs 6 are engaged with each other to form a gap 7 , and at least one filter membrane 8 is sheathed on the flow control plug 6 , and the filter membrane 8 closely fits with the through hole 51 .

[0050] The filter of the present invention is pr...

Embodiment 2

[0063] Such as Figure 4 and Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that: in this embodiment, the flow control plug 6 is provided with slots 61 with a spacing not greater than 0.5mm, and the flow control plug 6 removes the The rest of the groove 61 forms a sealing fit with the inner wall of the through hole 51 . In this way, a gap can be formed between the slot 61 and the through hole 51 . The medicinal liquid in the water storage tank 5 can flow out through the gap, and then pass through the filter membrane 8 that can adjust and control the flow rate to the liquid-stop filter membrane 4, so that the whole infusion process continues, thereby maintaining A slow infusion state to overcome the venous pressure of the human body also effectively plays the role of preventing blood return.

Embodiment 3

[0065] Such as Figure 6 and Figure 7 As shown, the difference between this embodiment and Embodiment 1 is that: in this embodiment, slots 52 with a distance of not more than 0.5 mm are provided at the edge of the through hole 51, and the flow control plug 6 and the The remaining part of the edge of the through hole 51 except the groove 52 forms a sealing fit. In this way, a gap can be formed between the slot 52 and the flow control plug 6 . The medicinal liquid in the water storage tank 5 can flow out through the gap, and then pass through the filter membrane 8 that can adjust and control the flow rate to the liquid-stop filter membrane 4, so that the whole infusion process continues, thereby maintaining A slow infusion state to overcome the venous pressure of the human body also effectively plays the role of preventing blood return.

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Abstract

The invention discloses a filter with blood return preventing time controllable on a medical infusion set and a medical infusion set. The filter comprises a barrel body with two communicated ends and a liquid stopping type filtering membrane dividing the inner cavity of the barrel body into an upper portion and a lower portion, the filter further comprises a water storage tank, the water storage tank is fixedly arranged on the upper half portion of the inner cavity of the barrel body, at least one through hole is formed in the water storage tank, each through hole is connected with a flow control plug in a clamping mode to form a clearance, at least one permeable filtering membrane layer is sleeved on the flow control plug, and the permeable filtering membrane is in close fit with the through holes through the flow control plug. The filter has the functions of preventing no dripping and preventing backflow, can guarantee that residual medicine liquid in the water storage tank has enough time to drip slowly through the clearances when the medical infusion set will complete infusion, the venous pressure generated in the blood spread of the human body is overcome, the fact that the medical infusion set has enough preparation time to prevent blood return in an infusion process is guaranteed, and the time of preventing the blood return is made to be capable of being controlled.

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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IPC IPC(8): A61M5/38A61M5/14
Inventor 毛春元魏安
Owner SHANGHAI JINTA MEDICAL
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