Self-venting filter type indwelling needle

Abstract

The invention relates to an indwelling needle, in particular to an automatic-venting filtration type indwelling needle, and belongs to the technical field of medical instruments. According to the technical scheme, the automatic-venting filtration type indwelling needle comprises an indwelling needle body and an infusion guide pipe communicated with the indwelling needle body. A filter screen for filtering particles and a vent valve with a switch are arranged in the infusion guide pipe, wherein the vent valve is used for discharging air in the infusion guide pipe. Liquid entering the indwelling needle body can be effectively filtered through the filter screen, and then the purity degree of the liquid passing through the indwelling needle body for infusion is guaranteed; moreover, the air can be effectively prevented from entering a vein and contamination is avoided through turn-on or turn-off of the vent valve; an indwelling needle switch arranged in the indwelling needle body can prevent flood from flowing back into the indwelling needle body, and then the blood can be prevented from forming an embolism in the indwelling needle body; an accidental stab and cross infection caused by a puncture needle can be avoided through a puncture needle protective device; the automatic-venting filtration type indwelling needle is simple and compact in structure, convenient to use, wide in application range, safe and reliable, and the service life of the indwelling needle is prolonged.

Description

technical field [0001] The invention relates to an indwelling needle, in particular to a self-exhaust filtering type indwelling needle, which belongs to the technical field of medical instruments. Background technique [0002] Venous indwelling needle is a common medical device in nursing work. It is easy to use and reduces the number of punctures for patients, thereby reducing repeated punctures during clinical infusion, reducing the pain of puncture for patients and the workload of clinical nurses. It has been widely used in clinical practice today. [0003] Among the existing intravenous indwelling needles, generally include: puncture needles, indwelling needles and infusion catheters. When in use, first, the user inserts the puncture needle connected with the indwelling needle into the patient's injection site, then guides the indwelling needle into the patient's blood vessel through the puncture needle, and finally pulls out the puncture needle so that the indwelling n...

AI Technical Summary

Problems solved by technology

[0004] The general disadvantages of existing indwelling needles are: 1), when the indwelling needle is infused or injected through the infusion pipeline or three-way valve connected to the indwelling needle, it may enter the venous blood vessel with gas; 2), the indwelling needle remains in the In the patient's blood vessel, although the flushing nursing has been carried out, the indwelling needle is often still blocked by blood embolism, especially in patients with high blood coagulation state; 3) When the indwelling needle puncture operation is completed, the puncture needle may puncture Injury to the operator, the staff may also be stabbed when handling the waste, and may cause cross-infection; 4) When the indwelling needle is fixed, it is inconvenient to take the special film; at the same time, the fixing method of the outer cover When the infusion tube is subjected to external force, the force-bearing part of the film is concentrated on the infusion tube, and it is easy to tear off, which will cause the indwelling needle to come out

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