Transfusion retaining pipe or duct for transferring liquid into blood vessel

A liquid input and indwelling tube technology, which is applied to catheters, devices introduced into the body, and guiding needles, etc., can solve the problems of difficult operation, low rigidity, large resistance, etc., to meet the needs of multiple punctures, reduce the degree of damage, The effect of reducing drag

Inactive Publication Date: 2007-06-27
SUN MEDICAL SCI SHANGHAI
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AI Technical Summary

Problems solved by technology

[0006] In actual use, it is found that since the end of the front end of the soft needle sheath is a plane that forms an angle of 90° with the longitudinal axis of the hose or the longitudinal pipe wall (for details, please refer to the publication of the Chinese Patent Application for Invention with the publication number CN 1468637A Figure 3 in the text), and because the rigidity of the material constituting the needle sleeve is small, the resistance during blood vessel puncture is relatively large, which brings difficulties to the operation. If a puncture is unsuccessful and requires two or more punctures In some cases, the front end of the needle sleeve will form a "flare mouth" shape that expands outwards (expanded), and in severe cases, the front end of the needle sleeve may even crack, resulting in the inability to continue the puncture operation, and it must be replaced with a new set before it can be restarted

Method used

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  • Transfusion retaining pipe or duct for transferring liquid into blood vessel

Examples

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Effect test

Embodiment 1

[0023] Its structure is shown in Figure 2. A chamfered structure 4 is provided on the front end wall of the soft indwelling tube or catheter end 3 to further reduce its puncture resistance.

[0024] The rest are the same as before.

Embodiment 2

[0026] Its structure is shown in FIG. 3 , the soft indwelling tube or catheter end 3 is combined with the joints 5 and 6 of its outer wall in a smooth transition.

[0027] The joint part adopts a smooth transition structure, which can also reduce the puncture and marching resistance of the soft indwelling tube or catheter, prolong its service life, increase the number of successful punctures, and minimize the damage to blood vessels.

[0028] The rest are the same as before.

[0029] Considering the simplification of the processing technology, as a simplified structure, the end 3 of the front end of the indwelling hose can also adopt a non-planar arc surface structure, and its specific structure can be fully understood and understood by those skilled in the art. Tell me more.

[0030] Since the longitudinal section of the soft indwelling tube or the end of the catheter front end adopts a non-planar wedge-shaped structural feature, the present invention avoids many defects and...

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Abstract

The present invention is transfusion retaining pipe or duct for transferring liquid into blood vessel, and belongs to the field of medicine equipment technology. The soft retaining pipe or duct covering the metal guide needle with wedged tip has inclined end. The soft retaining pipe or duct can meet the requirement for long time intravenous injection and several times of puncturing, and has facilitated intravenous puncture operation and minimized damage to the blood vessel. The present invention may be used widely in different types of gravitational or pressure intravenous injection and transfusion sets.

Description

technical field [0001] The invention belongs to the field of medical instruments, in particular to an instrument for inputting a liquid medium into a human body. Background technique [0002] Intravenous infusion (being commonly called as transfusion) is one of main means of present clinical rescue, treatment patient. [0003] The most commonly used infusion method at present is that rigid (metal) needle is penetrated into vein and injected, and needle is pulled out after injection. For patients who need infusion several times a day, they need to endure at least one acupuncture pain for each injection, which undoubtedly adds a mental burden and physical pain to the patient. [0004] At the same time, with the advancement of medical methods and the research on the mechanism of drug action, low-dose and long-term injection supply / treatment methods have appeared for patients with certain special diseases due to the needs of treatment. For such patients, the rigid needle stays...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/06A61M25/00A61M5/158A61M5/32A61M39/08
Inventor 沈路一
Owner SUN MEDICAL SCI SHANGHAI
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