Safety type artery and venous indwelling needle with airtight interface without needle

Abstract

Disclosed is a safety type artery and venous detaining needle having a needle free closed interface, a puncture needle and a protection device are composed of a needle seat shield cover, a puncture needle tube, a puncture needle seat, a puncture needle protection sleeve, a limit rope and a protection spring; the artery and venous detaining needle is composed of a detaining needle soft cannula, a detaining needle guide tube, a detaining needle protection sleeve tube and a detaining needle seat; the needle free closed interface is composed of a detaining needle seat, a seal rubber auditory tube and an interface shell. And the needle free closed interface forms one body with the artery and venous detaining needle group, while the puncture needle and the puncture needle of the protection device puncture thereinto. The invention is formed by the above structures. The invention can actively protect the puncture needle from stabbing the medical care personnel and staff handling the waste; the needle free closed interface is connected with the transfusion connector, and not no to connect with the needle point, so the invention can prevent the blood spilling, avoid the blood pollution, improve the working efficiency and protect 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 safety device with a needle-free airtight interface for infusion of liquid into blood vessels during arteriovenous puncture and during the indwelling period after puncture. Arteriovenous catheter. Background technique [0002] Infusion can transport 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 of puncturing the 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 conditions of blood vessels (hardening and fragility) in children and the elderly. Increase the difficulty of puncture and increase the pain of the patient being punctured, and may even be damaged by multiple punctures of the superficial blood vessels, and ca...

AI Technical Summary

Problems solved by technology

[0003] One is: there is a safety risk to the user and the surrounding personnel: since the metal puncture needle needs to penetrate the indwelling needle, its length is longer than that of ordinary puncture needles, the needle body is slender, and there is no protective device on the outside. Needle-stick injuries of personnel and subsequent medical waste disposal personnel may cause nosocomial infection due to the virus contained in the blood on the needle tip

[0004] The second is: there is a safety risk for both the recipient and the patient: because 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 flow back. Pollution of the environment and the human body (medical staff and patients) poses a safety risk; moreover, when the indwelling needle needs to be used for repeated infusion, the indwelling needle interface is connected to the infusion connector of the liquid infusion device, and the infusion connector pullout action after the infusion will inevitably make the indwelling needle The inner cavity of the needle forms a certain negative pressure; it will cause the blood in the indwelling needle tube and the blood vessel to flow back into the indwelling needle tube

Blood coagulation will occur to form emboli, which will block the indwelling needle channel and destroy the indwelling needle channel. The next time it is used, it will affect the treatment and increase the labor of medical staff

[0005] The third is: increase the labor intensity of medical care, cumbersome operation, increase the patient's burden, and the scope of 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 set a conductive support in the tail cavity of the indwelling needle seat, rubber seal the liquid flow channel, and use the conductive support (sleeve) in the Under the action of external force (infusion set or syringe or catheter socket), it penetrates it and conducts it again, but it does not explain how the lead-through bracket is separated from it and sealed again after the infusion set and other sockets are removed. Therefore, this product can only Meet the only 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 blood from spilling out of the needle channel, which may cause contamination or cross-infection; 2. The puncture needle tip protection device is not completely effective 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 the heparin cap is used to connect the indwelling needle seat. During use, it must be punctured with an injection needle or venous needle to achieve liquid infusion, and there is a danger of being stabbed by the needle.

[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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