Safety type artery and vein indwelling needle with needleless closed positive pressure interface

Abstract

The present invention provides a safe arteriovenous remaining needle with non-needle close positive pressure joint. A puncture needle and its protective device is composed of neilsbed protective cover, puncture needle pipe, puncture neilsbed, punture needle protective shield, restoration spring, limiting cable; the arteriovenous remaining needle is composed of remaining needle soft pipe, remaining needle protective shield, remaining neilsbed; the non-needle colse positive pressure joint is composed of remaining neilsbed, liquid guide pipe, airproof plug, restoration spring, airproof rubber bag pipe, expandable stent, puncture needle guild, joint cover. The non-needle close positive pressure joint combines with arteriovenous remaining needle, the puncture needle and the puncture needle of its protective device are through in them. The puncture needle with initiative protection can prevent puncturing medical care personnel and waste processing personnel; the non-needle close positive pressure joint can prevent reflow and overflow of venous blood and blood pollution, and aslo can avoid blood reflowing into needle tube forming concretion without some cockamamie operation such as heparin in sealing, at the same time, improves the working efficient and protects safe of medical care personnel and patient.

Description

technical field [0001] The present invention relates to a medical device for infusion of liquid, in particular to a medical device with a needle-free airtight positive pressure port for infusion of liquid into blood vessels during the process of arteriovenous puncture and the indwelling period in the blood vessel after the puncture. Safety Arteriovenous 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, long-term infusion therapy by puncturing blood vessels of patients is often used due to periodic treatment plans, such as chemotherapy for tumors, treatment of cardiovascular and cerebrovascular diseases, and poor vascular conditions (hardening and increased fragility) in children and the elderly. It will cause damage to the patient's blood vessel condition, or the patient's non-cooperation will increase the pain ...

AI Technical Summary

Problems solved by technology

[0003] One is: there is a safety risk for the user and surrounding personnel: since the metal puncture needle needs to penetrate the indwelling needle, its length is longer than that of ordinary puncture needles, and the needle body is slender. There is a risk of hospital-acquired infection caused by the virus contained in the blood on the needle tip and the medical waste disposal personnel who are injured by needles.

[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 patients), 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, It will cause blood backflow in the indwelling needle tube and blood vessels into the indwelling needle tube

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

[0005] The third is: increase the labor intensity of medical care, cumbersome operation, re-puncture, increase the pain and burden of patients, and the application is limited: after the current indwelling needle is pulled out, a protective cap must be used to seal the indwelling needle interface

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. When the blood enters the indwelling needle tube, it coagulates, and the indwelling needle becomes blocked, resulting in inability to infuse again. 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 ischemic necrosis of some tissues or organs. , causing serious consequences

[0009] At present, no arteriovenous indwelling catheter technology that can completely solve the above-mentioned problems has been disclosed in China.

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