Arteriovenous puncture needle with novel structure and functions

Abstract

The invention relates to an arteriovenous puncture needle. The current vascular puncture needle cannot judge whether an outer sleeve enters the blood vessel or not, and the success rate of inserting the outer sleeve after puncture is not high. In the invention, the structure and functions of the existing vascular puncture needle are changed, the arteriovenous puncture needle judges whether the outer sleeve enters the artery and the vein, and the success rate of inserting outer sleeve after puncture is improved. The arteriovenous puncture needle is characterized in that grooves are arranged at the outer surface of an inner puncturing steel needle and the inner wall of an outer sleeving hose, or the caliber of the rear part of the inner puncturing steel needle is reduced, and an air gap between the outer sleeving hose and the inner puncturing steel needle is increased; a notch is arranged at the top end of the outer sleeve; the outer sleeve is judged whether to enter the blood vessel through the blood flowing out along the groove; the length of the outer sleeving hose is increased, the tilt angle of a needle head bevel of the inner puncturing steel needle is increased, the needle head bevel of the inner puncturing steel needle is changed to face downward, and the probability of puncturing the opposite blood vessel by the inner puncturing steel needle is reduced; and anticoagulant coatings are arranged on inner and outer walls of the inner puncturing steel needle and the inner wall of the outer sleeving hose so as to prevent the inner puncturing steel needle or the air gap of the groove from being blocked by small blood clots after repetitive tentative needle insertion.

Description

technical field [0001] The invention relates to a puncture needle widely used for medical purposes, in particular to a novel arteriovenous and venous puncture needle. Background technique [0002] Arterial and venous puncture needles are commonly used instruments in the medical field. Major surgery patients and some intensive care patients need arterial puncture and catheterization to monitor hemodynamic indicators (such as mean arterial pressure, systolic blood pressure, diastolic blood pressure, etc.); almost all surgical patients need puncture and catheterization to establish peripheral venous access. Infusion. During this procedure, a puncture needle is used. [0003] There are two kinds of arterial puncture needles widely used at home and abroad at present: 1) Utilize venipuncture needle to puncture artery, its shortcoming is that it is impossible to judge whether the overtube (requires indwelling pressure measurement) enters the artery. When the inner steel needle h...

AI Technical Summary

Problems solved by technology

There are four disadvantages: ①The needle is relatively thick (because a soft guide wire is added inside the inner-piercing steel needle), which will cause local damage to the patient, especially when repeated puncture; ②There is a soft steel wire inside the inner-piercing steel needle, When the inner-pierced steel needle penetrates the artery, the blood backflow rate is very slow, and the time for judging the position of the inner-pierced steel needle tip is prolonged. There are three small gaps on the surface of the inner penetrating steel needle, and this problem has not been well resolved); ③Because a soft steel wire needs to be inserted into the artery, it may cause damage to the arterial intima; ④The cost is high and the cost is high

However, no patents that can determine whether the outer cannula enters the blood vessel have been found.

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