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Guide tube for inserting infusion needle

A technology of infusion needles and catheters, applied in the direction of devices introduced into the body, etc., can solve problems such as no consideration, and achieve the effect of tight bonding, preventing liquid leakage and slipping needles

Active Publication Date: 2011-08-17
SICHUAN KELUN PHARMA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now people only consider the technology of tightly wrapping the infusion needle with a certain elastic material to prevent leakage and needle slippage, but do not consider adding a suitable inner hollow structure to make the effect of preventing liquid leakage and slippage better

Method used

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  • Guide tube for inserting infusion needle
  • Guide tube for inserting infusion needle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Modified polypropylene material is used for one-time injection molding of the catheter for the insertion of the infusion needle on the plastic infusion container. The catheter 1 includes an infusion needle insertion section 2 for connecting the sealing cap at one end, and a liquid guide section 3 communicated with the plastic infusion container at the other end A sealing diaphragm 4 is provided at the junction of the inner space of the infusion needle insertion section 2 and the liquid diversion section 3 , the sealing diaphragm 4 is concave, and the concave shape faces the infusion needle insertion section 2 . The cross-sectional diameter of the junction of the infusion needle insertion section 2 and the liquid diversion section 3 is d=5.3 mm, the cross-sectional diameter of the opening of the infusion needle insertion section 2 is D=5.5 mm, and the opening end of the infusion needle insertion section 2 to the sealing diaphragm 4 The length is L=13.5mm. The taper of th...

Embodiment 2

[0024] The structure of the infusion needle insertion section 2 of the catheter 1 into which the infusion needle is inserted is basically the same as that of embodiment 1, the sealing diaphragm 4 is a plane, and the internal hollow structure parameters of the infusion needle insertion section 2 of the catheter into which the infusion needle is inserted are expressed as:

[0025] D=5.5mm, d=5.2mm, L=13.5mm, a / 2=0.64°;

[0026] This embodiment is applicable to infusion needles with a taper of 1.0°-1.5°.

Embodiment 3

[0028] The structure of the infusion needle insertion section 2 of the catheter 1 into which the infusion needle is inserted is the same as in Example 1, and the internal hollow structure parameters of the infusion needle insertion section 2 of the catheter into which the infusion needle is inserted are expressed as:

[0029] D=5.5mm, d=5.1mm, L=13.5mm, a / 2=0.85°;

[0030] This embodiment is applicable to infusion needles with a taper of 1.5°-2.0°.

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PUM

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Abstract

The invention relates to a guide tube for inserting an infusion needle, which pertains to a buccal tube for sealing a plastic infusion container or one part of a sealing cover, comprising liquid flow guiding segment with one end thereof connected with an infusion needle inserting segment of the sealing cover, and other end thereof communicated with the infusion container; the inner border of the infusion needle inserting segment and the liquid flow guiding segment is provided with a sealed membrane. The guide tube is characterized in that: the diameter d of the section of the inner border of the infusion needle inserting segment and the liquid flow guiding segment is smaller than the diameter D of the section of an opening of the infusion needle inserting segment; and the conical angle ofa circular inner cavity of the infusion needle inserting segment is a, wherein a / 2 is between 0.25 and 1.75 degrees. The guide tube has the advantages that the shape of the inner cavity of the infusion needle inserting segment of the guide tube is designed into a structure that can be closely jointed with the partial shape of an infusion needle main pole, thus being capable of preventing liquid leakage and needle slipping during an infusion process.

Description

technical field [0001] The invention belongs to the technical field of medical infusion packaging accessories, in particular to an inner hollow structure of a catheter for insertion of an infusion needle. Background technique [0002] Plastic infusion containers include plastic soft bags and plastic bottles. The hollow structure of the catheter for the insertion of the infusion needle on it should be closely attached to the main rod of the inserted infusion needle to prevent leakage and the infusion needle from slipping out of the catheter. i.e. slip stitch. In order to prevent leakage and needle slippage, the infusion needle catheter must be made of a certain elastic material. After the infusion needle is inserted into the inner space of the catheter, the elastic contraction force of the catheter will tightly wrap the infusion needle. Now people only consider the technology of tightly wrapping the infusion needle with a certain elastic material to prevent leakage and slipp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/162A61M5/14
Inventor 程志鹏丁小川廖礼毅
Owner SICHUAN KELUN PHARMA CO LTD