Y-type safe arteriovenous remaining needle with needle-free interface plus pressure closed-type valve

Abstract

The invention relates to a Y-shaped safe iliac artery and vein remaining needle with an orthobaric closed-type valve of an inermous port. A safe puncture needle consists of a puncture needle, a puncture needle seat, a protection sleeve of needle points, a protection spring and a limit cable; an iliac artery and vein remaining needle consists of a hose of the iliac artery and vein remaining needle, a guiding catheter of the puncture needle, a remaining needle seat and a sealing plug; the orthobaric closed-type valve of the inermous port consists of a shell, a piston, a sealing ring, a sealing plug, a spring, a liquid honeycomb duct and a base. The base and the puncture needle show Y-shape in integration. The safe puncture needle passes through the remaining needle. The components of above form the invention. The invention has a function of protecting the puncture needle actively, which can avoid propagation of infection and diseases caused by hurting medical care personnel mistakenly; a function of orthobaric closing is provided, thus can prevent vein blood from returning and spilling over, avoid blood pollution, prevent blood from forming occlusion in a puncture needle tube without the operation of using heparin to close the tube, etc; the invention also has a function of inermous connection, thus avoiding hurting by the needle, improving working efficiency and guarantee the safety of the medical care personnel and patients.

Description

technical field [0001] The invention relates to a medical device for infusion of liquid, in particular to a positive pressure airtight valve with a needle-free interface for infusion of liquid into blood vessels during arteriovenous puncture and during the indwelling period in blood vessels after puncture safe arteriovenous indwelling catheter. Background technique [0002] Infusion can transfer almost all medicinal liquids into the human body through blood vessels to achieve the purpose of treating and preventing diseases. In clinical practice, blood vessels are often punctured multiple times for infusion therapy due to periodic treatment plans. In the process of chemotherapy for tumors, treatment of cardiovascular and cerebrovascular diseases, and poor vascular conditions (hardening and increased fragility) in children and the elderly, the patient's blood vessels are damaged due to multiple punctures, or the patient does not cooperate, which will increase the patient's pa...

AI Technical Summary

Problems solved by technology

[0003] One is: there is a safety risk to users and surrounding personnel: since the metal puncture needle needs to penetrate the indwelling needle, its length is longer than that of ordinary puncture needles. After the puncture is pulled out, there is no protective device on the outside, which will easily cause medical staff and future medical waste. There is a risk of nosocomial infection caused by the virus contained in the blood on the needle tip

[0004] The second is: there is a safety risk for the recipient, the patient and the surrounding personnel: since the indwelling needle holder has the same structure as the ordinary puncture needle holder, there is no measure or device to prevent blood backflow (backflow), so that after the puncture needle is pulled out, the blood will backflow , pollute the environment and the human body (medical staff and surrounding people), and form a safety risk; moreover, in the process of repeated infusion with the indwelling needle, the action of pulling out the infusion connector after one infusion will inevitably form a certain negative pressure in the inner cavity of the indwelling needle , will cause the blood in the indwelling needle tube and blood vessels to flow back into the indwelling needle tube, blood coagulation will occur, and emboli will be formed, destroying the indwelling needle channel

When it is used again, due to the blockage of the indwelling needle channel, it will affect and treat and increase the labor of medical staff; moreover, if the embolus falls off and enters the blood vessel, it will enter the tissue or organ of different parts of the human body with the blood flow, causing the tissue or organ blood vessel to be damaged. Serious embolism can cause ischemia and necrosis of the organ, and the consequences are very serious and dangerous

[0005] The third is: increase the labor intensity of medical care, the operation is cumbersome, and after the embolism occurs, it needs to be punctured again, which will increase the pain and burden of the patient and limit its application

Chinese patent: CN200620080001.2 discloses another method for automatically preventing blood reflux and overflow, which is to install a sealing plug and a conducting bracket in the tail cavity of the indwelling needle seat, the rubber sealing plug seals the liquid flow channel, and the conducting bracket ( Sleeve) penetrates the sealing plug under the action of external force (infusion set or syringe or catheter socket), and conducts again, but it does not explain how the conductive support is separated from the sealing plug after the socket of the infusion set is pulled out, and is sealed again Therefore, this product can only meet the one-time use of the indwelling needle and the liquid pipeline interface

[0008] 1. In the process of pulling out the puncture needle after successful vascular puncture, it cannot effectively prevent the blood from spilling out of the needle channel, which may cause pollution or cross infection; 2. The puncture needle tip protection device is incomplete or unreasonable

As in the above-mentioned published patent, the needle tube is made of an enlarged ball, although it is enough to limit the shedding of the protective sleeve, but there is resistance or obstacles in the process of inserting the needle tube into the indwelling needle hose and the needle seat

The puncture needle protective cover composed of series-connected sleeves also increases the overall length of the puncture needle, which increases the inconvenience and cost of operation.

3. The key and important thing is that after the socket of the indwelling needle is inserted into the socket of the infusion set or syringe or liquid infusion device for infusion, after the socket is pulled out, the negative pressure of the blood in the blood vessel due to the pullout of the socket will cause the backflow of blood , the blood enters the indwelling needle hose and coagulates, and the indwelling needle is blocked, resulting in inability to re-infusion. In severe cases, the blood clot falls off and enters the blood vessel. With the blood flow, it will cause venous embolism in small blood vessels, causing ischemia in some tissues or organs necrosis, with serious consequences

However, since the puncture needle and the infusion connector all pass through the same needle-free interface, the technical solution is too complicated in structure and high in cost during the implementation process, which is not conducive to popularization

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