Arterial remaining needle capable of displaying arterial pulsation

Abstract

The invention belongs to the technical field of medical devices, and discloses an arterial remaining needle capable of displaying arterial pulsation. The arterial remaining needle comprises a stainless steel needle, a remaining needle, a pressure measuring catheter and a steel wire inner core, wherein the stainless steel needle comprises a needle body and a needle seat; a guide device is installed on the needle seat; the needle body is hollow; a hollow cavity is formed in the needle seat; the steel wire inner core enters the stainless steel needle through the guide device of the needle seat; the wall side of the needle body is provided with a blood return groove; the remaining needle consists of a remaining needle catheter, a catheter seat located on the tail end of the remaining needle catheter and a check valve placed in the catheter seat; the catheter seat is connected with the needle seat in a sheathing way; the catheter seat is hollow, and is provided with a side tube communicated with the catheter seat; the side tube is connected with the pressure measuring catheter; the check valve is located above the side tube; the blood return groove is located in an inner cavity formed by the catheter seat and the check valve; a hemostatic clamp is arranged on the pressure measuring catheter. According to the arterial remaining needle, the structure is simple; the use is convenient; the success rate of arteriopuncture cathetering can be effectively improved; the pollution caused by blood overflow is avoided; moreover, the pain and the economical burden of a patient are reduced.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to an arterial indwelling needle which can be used for monitoring arterial blood pressure. Background technique [0002] Clinically, for critically ill surgical patients or intensive care patients who need continuous blood pressure monitoring, invasive blood pressure monitoring is usually used, that is, an arterial indwelling needle is inserted into the artery, and then connected to an arterial manometry device to measure changes in arterial blood pressure in real time. [0003] Chinese patent "CN201200455Y", titled "Y-shaped arterial puncture trocar with guide wire to prevent blood spraying outside", application number "200820022391.7", discloses an arterial puncture needle, including an outer cannula, and a branch is set on one side of the outer cannula The outer casing is filled with sealing material, and the inner puncture needle is installed, the inner cavity of the inn...

AI Technical Summary

Problems solved by technology

[0005] However, this arterial indwelling needle has the following defects: 1) The success rate of arterial puncture and catheterization is low, and the side tube cannot observe the arterial pulse: because the side hole of the stainless steel needle tube is located in the outer cannula, blood passes through the side hole along the distance between the outer cannula and the stainless steel needle tube It flows upwards. During use, it is found that due to its excessive resistance, it is difficult for blood to reach the inner cavity channel of the catheter seat after needle insertion. Immediately increasing the number of slots in the outer sleeve, and blood returning to the cavity can only explain the stainless steel needle tube of the stainless steel needle tube. The needle has been inserted into the arterial vessel, but there is no guarantee that the indwelling needle tube outside the stainless steel needle tube will also be inserted into the arterial vessel. If the front end of the indwelling needle tube is not inserted into the arterial vessel and the stainless steel needle is pulled out, the catheter will fail, so it is not only troublesome to operate, but also causes waste and delay 2) There is no reasonable anti-reverse device in the stainless steel needle and guide wire, so that the blood in the needle tube is easy to overflow along the needle tube, causing the blood to spray out and pollute the environment

[0007] However, the arterial puncture needle mentioned above also has some shortcomings. It is found in clinical practice that the stainless steel needle tube is accompanied by a small amount of blood return when the check valve is pulled out, which is easy to overflow and cause pollution. reinsertion, which causes additional pain to the patient

[0008] The puncture effect of the common arterial puncture needles currently on the market is still not good, and the reasons for the easy failure of puncture and poor puncture effect are: (1) The influence of the position and number of blood return slots on the success rate of arterial puncture has not been noticed

In clinical trials, it was found that the common arterial puncture needles in the domestic market usually have a blood return groove, which is located at the tip of the lower end of the stainless steel needle. The blood cannot reach the cavity where blood pulsation can be observed in a short period of time, and judging the position of arterial puncture by observing the blood flow in the cannula is not accurate

Common arterial puncture needles in foreign markets usually have three blood return grooves, which are located in the middle and lower part of the indwelling catheter, and the width of the blood return groove is 0.3mm. Domestic products have better blood return effect, but the processing is difficult, the process requirements are too high, and the strength of the puncture needle is affected, which is not conducive to the use of the puncture needle. The wider blood return groove will also cause blood to overflow during the process of pulling out the puncture needle and cause pollution.

(2) The common arterial puncture needles on the market are long beveled needles. This kind of needle tip is easy to pierce the skin but it is not easy to insert the indwelling tube into the correct position, resulting in the failure of the indwelling tube

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