Negative pressure type jugular vein visual blood-returning retaining needle

Abstract

The invention relates to a negative pressure type jugular vein visual blood-returning retaining needle. The negative pressure type jugular vein visual blood-returning retaining needle comprises a catheter assembly and a needle tube assembly which are mutually connected, wherein the catheter assembly comprises a catheter seat and a catheter which is fixed to the far end of the catheter seat and isused for infusion; the needle tube assembly at least comprises a needle tube seat and a needle tube; the near end of the needle tube is fixedly arranged in the needle tube seat; the far end of the needle tube penetrates through the hollow inner part of the catheter and extends out; a side flap is arranged on one side of the needle tube seat; a negative pressure source is fixedly arranged on the side flap, and communicates with the first end of an observation window; and the second end of the observation window communicates with the bottom of the needle tube. According to the negative pressuretype jugular vein visual blood-returning retaining needle disclosed by the invention, the negative pressure source is arranged, so that negative pressure is formed in the needle tube, blood in the needle tube can quickly flow back to the inner part of the observation window and the negative pressure source, and the problems that the blood pressure of a patient is not enough and blood returning isslow are solved.

Description

technical field [0001] The invention relates to the technical field of infusion equipment, in particular to a jugular vein negative pressure visual blood return retention needle. Background technique [0002] The intravenous indwelling needle is a medical device used for intravenous infusion therapy. The existing indwelling needle includes a needle base and a puncture needle. One end of the needle base is an indwelling soft catheter, and a needle cavity is formed in the needle base, and the needle cavity communicates with the indwelling hose. , an isolation plug is set in the needle cavity, and the puncture needle passes through the isolation plug and is inserted into the indwelling hose. When the medical staff punctures the patient's venous blood vessel, it is necessary to judge whether the indwelling needle tube has penetrated into the patient's venous blood vessel by observing whether there is blood return. [0003] When medical personnel perform puncture, since the pres...

AI Technical Summary

Problems solved by technology

[0003] When medical personnel perform puncture, because the pressure in the needle cavity does not change, there is a problem that it is not easy to observe the return of blood

In some special cases, the patient's venous blood return speed will be slowed down. For example, in some patients, the subcutaneous fat is too thick, which will lead to slow venous blood return. Low, resulting in slow venous return

Especially for patients with insufficient circulating blood volume and hypoproteinemia edema, due to insufficient circulating blood volume and poor nutritional status, the patient's blood vessels collapse and the blood vessels are not filled, making it difficult to observe blood return when placing the indwelling needle, which affects the success of puncture Rate

[0004] In general, the needle of the indwelling needle is far away from the blood return cavity, and sometimes the blood pressure is too low to squeeze the blood into the blood return cavity. The time required for the blood in the patient's venous blood to flow from the needle of the indwelling needle tube to the blood return cavity is much longer than that of the medical staff. The operation time of puncturing the patient's venous blood vessel will make it difficult for the medical staff to accurately judge whether it has been punctured into the patient's venous blood vessel, resulting in repeated punctures. Since the catheter wall is very thin, repeated punctures will cause the catheter to fold and generate thrombus. Cause mechanical phlebitis, bring unnecessary pain to patients, and reduce the work efficiency of medical staff

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