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A vacuum blood collecting tube with adjustable negative pressure

A vacuum blood collection tube and negative pressure technology, applied in the field of medical devices, can solve the problems of reducing the vacuum degree of the vacuum tube cavity, complicated operation, waste of blood samples, etc., and achieve the effects of smooth piston movement, simple and convenient operation, and sufficient blood volume.

Active Publication Date: 2019-01-15
PEKING UNIV FIRST HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Leaving the vacuum blood collection tube for a long time will reduce the vacuum degree in the vacuum tube cavity, which will reduce the negative pressure in the vacuum blood collection tube, resulting in the consequence that a sufficient amount of blood samples cannot be collected
[0003] The existing treatment methods mainly include the following: 1. Abandon the vacuum blood collection tube with reduced negative pressure; this method causes waste of resources and blood samples, and the patient’s acceptance is poor; 2. Take blood samples from patients through syringes , and then injected into the vacuum blood collection tube; this method is cumbersome to operate, prone to needle stick injury, and the patient needs to undergo venipuncture again, and the acceptability is poor

Method used

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  • A vacuum blood collecting tube with adjustable negative pressure
  • A vacuum blood collecting tube with adjustable negative pressure
  • A vacuum blood collecting tube with adjustable negative pressure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as Figures 1 to 4 As shown, the negative pressure chamber 11 of this embodiment is located above the piston 3 and is formed by sealing the piston 3 , the upper part of the tube body 1 and the sealing plug 2 .

[0027] The pressure regulating chamber 12 is located below the piston 3 and is formed by the piston 3 and the lower part of the pipe body 1 . Specifically, such as figure 1 As shown, the pipe wall at the lower part of the pipe body 1 forming the pressure regulating chamber 12 is provided with a chute 1a, and the pressure regulating chamber 12 communicates with the outside through the chute 1a.

[0028] In addition, when the sliding button 4 drives the piston 3 to move, the sliding button 4 slides along the chute 1a, and the chute 1a acts as a limit guide for the sliding button 4. Such as figure 1 As shown, the sliding grip 4 includes: a grip part 41 for supporting the finger pulp, which is located outside the tube body 1; and a sliding part 42 that can s...

Embodiment 2

[0037] During the blood collection process, if the position of the two clasps 41 deviates from the direction of the two fingers of the medical staff, for example, when they are in the same direction as the two fingers, it is necessary to rotate the tube body or adjust the direction to make the fingers fit smoothly. On the two clasps 41 .

[0038] In order to make the operation more convenient and smooth for medical staff, such as Figure 5 As shown, in this embodiment, four slide grooves 1a are provided on the pipe body 1, and they are symmetrical in pairs. Preferably, the distance between two adjacent slide slots 1 a is 90°; and four handles 41 are correspondingly provided.

[0039] When in use, according to the position of each pair of clasps 41 , fingers are supported on the pair of clasps 41 that is handy.

[0040] The rest of the structure of this embodiment is the same as that of Embodiment 1 and will not be repeated here.

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PUM

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Abstract

The invention discloses a vacuum blood collecting tube with adjustable negative pressure, comprising a tube body and a sealing plug plugged at the tube mouth of the tube body, wherein the tube body isprovided with a negative pressure chamber isolated from the outside and a pressure regulating chamber communicated with the outside. The vacuum blood collecting tube further comprises a piston sealedin the tube body, the piston divides the tube body into the negative pressure chamber and the pressure regulating chamber. The sliding fastener connected with the piston is used for driving the piston to slide along the inner wall of the pipe towards the pressure regulating chamber, thereby increasing the volume of the negative pressure chamber. A medical staff of that invention can manually increase the negative pressure in the blood collection process, ensure the blood withdrawal quantity, and is simple in operation.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a vacuum blood collection tube with adjustable negative pressure. Background technique [0002] The existing vacuum blood collection tube includes a tube body and a sealing plug, and the tube body and the sealing plug form a sealed vacuum lumen. Leaving the vacuum blood collection tube for a long time will reduce the vacuum degree in the vacuum tube cavity, so that the negative pressure in the vacuum blood collection tube will decrease, resulting in the consequence that a sufficient amount of blood samples cannot be collected. [0003] The existing treatment methods mainly include the following: 1. Abandon the vacuum blood collection tube with reduced negative pressure; this method causes waste of resources and blood samples, and the patient’s acceptance is poor; 2. Take blood samples from patients through syringes , and then injected into the vacuum blood collection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/154A61B5/15
CPCA61B5/150236A61B5/154
Inventor 逄璐李海霞
Owner PEKING UNIV FIRST HOSPITAL