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

A technology of indwelling needles and arteries and veins, applied in the field of medical devices, can solve the problems of increasing the length of puncture needles, cumbersome operation, and limited scope of application, and achieve the effect of good puncture feel, accurate control, and reliable protection

Inactive Publication Date: 2008-01-16
张亚根
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 interfa

Method used

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

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specific Embodiment 2

[0031] Fig. 8 is another embodiment of the safe arteriovenous indwelling needle with a needle-free airtight interface of the present invention. The structural composition and function of the safety puncture needle are the same as those of the previous example, which are not shown in the figure and will not be described in detail. As shown in the figure, in the cavity formed by the interface shell 6 and the needle hub 3, the inner hole of the upper section of the needle hub 3 is bonded and fixed with the lower neck 4'a of the liquid guide tube 4'. The sealing plug 13 is embedded in the upper section of the liquid guide pipe 4 ′, and is tightly fixed to the side slit 4 ′ c. There is a round hole 5`a at the upper end of the sealing rubber bladder tube 5`, which is tightly fitted on the surface of the liquid diversion tube 4`; the middle section 5`b of the sealing rubber bladder tube 5` is thin and compressible, and the bottom is wide and thick, and there is also a hole 5` c is i...

specific Embodiment 3

[0033] Fig. 10 is a third embodiment of the safe arteriovenous indwelling needle with a needle-free airtight interface of the present invention. The structural composition and function of the safety puncture needle are the same as those of the previous example, which are not shown in the figure and will not be described in detail. As shown in the figure, the inner hole of the upper section of the indwelling needle holder 3 and the lower section of the narrowing 4'a of the liquid guide tube 4' are bonded and fixed by the interface shell 6. The sealing plug 13 is embedded in the upper section of the liquid guide pipe 4 ′, and is tightly fixed to the side slit 4 ′ c. There is a round hole 5`a at the upper end of the sealing rubber bladder tube 5` that is tightly fitted on the surface of the liquid diversion tube 4`, and its lower section 5`b is thinner and tightly fitted on the liquid diversion tube 4` and the side hole 4` on it is `b closed. Back-moving spring 14 is arranged o...

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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...

Claims

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Application Information

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IPC IPC(8): A61M25/06A61M5/158A61M5/32
Inventor 张亚平张亚根
Owner 张亚根
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