An arterial puncture needle capable of accurately and timely indicating whether a retention needle is successfully retained

Abstract

This utility model relates to an arterial puncture needle that accurately and promptly indicates whether an indwelling needle has been successfully inserted. It includes a steel needle and an indwelling needle tube. A blood return guiding hole is provided at the front end of the indwelling needle tube wall. A blood return indicator tube, Y-shaped with the indwelling needle tube, is provided at the rear end of the indwelling needle tube, and the blood return indicator tube communicates with the inner lumen of the indwelling needle tube. A recessed blood return groove is provided on the needle wall of the steel needle. The front end of the blood return groove corresponds to and is flush with the blood return guiding hole on the indwelling needle tube, and the rear end of the blood return groove corresponds to and is flush with the blood return indicator tube. An occluder is provided on the blood return indicator tube, and a heparin cap is provided at the end of the blood return indicator tube. This utility model can accurately, promptly, and reliably indicate whether the indwelling needle puncture has been successful, greatly improving the efficiency of successful indwelling needle insertion during arterial puncture. Furthermore, its structural design is more reasonable and simple, easy to operate, and provides a clear and concise indication. It is also easy to manufacture and suitable for widespread adoption and promotion.

Description

Technical Field

[0001] This utility model relates to medical device technology, specifically an arterial puncture needle that accurately and promptly indicates whether an indwelling needle has been successfully placed. Background Technology

[0002] In modern medicine, arterial puncture is required for certain surgeries and diagnostic procedures. Commonly used arterial puncture needles typically consist of a stainless steel needle, an indwelling needle, and a catheter sheath. The stainless steel needle includes a needle body, a needle hub, and a handle. The indwelling needle comprises an indwelling needle tube, a catheter hub, and a flow-closing valve. The indwelling needle tube is a soft, transparent plastic tube suitable for prolonged placement within the blood vessel. It is placed over the stainless steel needle tube and is approximately 1 mm shorter. The flow-closing valve is mounted on the catheter hub and opens or closes the lumen of the catheter hub by sliding it back and forth.

[0003] However, most arterial puncture needles currently available have the following shortcomings: low success rate of indwelling arterial puncture needle placement: because the stainless steel needle tube is about 1mm longer than the indwelling needle tube, during the placement process, even if blood returns in the lumen of the catheter seat after needle insertion, it only indicates that the needle tip of the stainless steel needle tube has been inserted into the artery, but it cannot guarantee that the indwelling needle tube outside the stainless steel needle tube has also been inserted into the artery. If the stainless steel needle is withdrawn before the tip of the indwelling needle tube enters the artery, the placement fails, and the needle must be reinserted. Therefore, it is not only troublesome to operate, causing waste and delaying time, but also increases the patient's pain and economic burden.

[0004] Below is a prior art document found through a novelty search that is closest to the technical solution of this application: CN201020683464.4, "An Arterial Puncture Needle". This document discloses an arterial puncture needle for detecting intra-arterial blood pressure, which consists of a stainless steel needle, an indwelling needle, a pressure measuring catheter, and a needle tube sheath. The stainless steel needle consists of a needle body, a needle seat, and a handle. The needle body has a blood return groove on its wall, and the needle seat has a tail plug at its tail end. The indwelling needle consists of an indwelling needle tube, a catheter seat, and a rubber check valve. The indwelling needle tube is a transparent plastic tube. The catheter seat has a side tube that connects to the pressure measuring catheter. The pressure measuring catheter has a hemostatic clamp. The rubber check valve is located at the rear edge of the side tube opening inside the catheter seat. The needle tube sheath is fitted over the indwelling needle tube. This utility model has a simple structure, is easy to use, can effectively improve the success rate of arterial puncture and catheter placement, reduce patient pain and economic burden, and avoid contamination caused by blood spillage.

[0005] After analysis, we believe that the technical solution described in the literature is still insufficient and needs to be improved. The problem is that the product has a blood return groove on the needle wall of the puncture needle. So as long as the needle enters the artery, blood return will form between the indwelling needle and the needle. However, it still cannot guarantee whether the indwelling needle has also entered the artery. This is because, obviously, even if the indwelling needle has not entered the artery, the arterial blood that has entered the inner lumen of the needle will still enter the indwelling needle tube through the blood return groove, causing blood return and pulsation. Therefore, this technical solution still cannot confirm or guarantee whether the indwelling needle tube is placed in the artery. Utility Model Content

[0006] The technical objective of this utility model is to provide an arterial puncture needle that accurately and timely indicates whether the indwelling needle has been successfully placed. It can accurately, timely, and reliably indicate whether the indwelling needle puncture has been successful, which can greatly improve the efficiency of successful indwelling needle placement during arterial puncture. Moreover, the structural design is more reasonable and simple, easy to operate, and the indication effect is clear at a glance. It has good effect, low manufacturing difficulty, and is suitable for popularization and promotion.

[0007] The technical solution of this utility model is as follows: an arterial puncture needle for accurately and timely indicating whether an indwelling needle has been successfully placed, comprising a steel needle and an indwelling needle tube, characterized in that: a blood return guiding hole is provided at the front end of the indwelling needle tube wall, and a transparent blood return indicator tube in a Y shape with the indwelling needle tube is provided at the rear end of the indwelling needle tube, the blood return indicator tube and the inner lumen of the indwelling needle tube are connected; a recessed blood return groove is provided on the needle wall of the steel needle, the front end of the blood return groove is aligned with and connected to the blood return guiding hole on the indwelling needle tube, and the rear end of the blood return groove is aligned with and connected to the blood return indicator tube; an occluder is provided on the blood return indicator tube, and a heparin cap is provided at the end of the blood return indicator tube.

[0008] Furthermore, the distance between the blood return guiding hole and the foremost tip of the indwelling needle tube in this utility model is set to 2-3 mm.

[0009] The beneficial effects of this invention are as follows: The above-mentioned structural design ensures that during arterial puncture, arterial blood will continuously and stably flow from the blood return guiding hole into the groove on the side wall of the steel needle and into the blood return indicator tube only after the indwelling needle has entered the arterial vessel. By observing the continuous blood return, including the pulsating color, in the blood return indicator tube, one can accurately determine whether the indwelling needle has been successfully placed. Furthermore, the blood return guiding hole is located at the tip of the indwelling needle, so once the indwelling needle enters the arterial vessel, it will be immediately apparent from the blood flow and pulsation in the blood return indicator tube, thus providing excellent timeliness. It can be observed with focused attention. This also subtly improves the concentration of medical personnel, thereby increasing the efficiency of puncture and successful indwelling needle placement. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of an embodiment of the arterial puncture needle of the present invention, which accurately and timely indicates whether the indwelling needle has been successfully placed.

[0011] Figure 2 This is an embodiment of an arterial puncture needle that accurately and promptly indicates whether an indwelling needle has been successfully placed, according to this utility model. Figure 1 A magnified view of a section at point I.

[0012] Figure 3 This is an embodiment of an arterial puncture needle that accurately and promptly indicates whether an indwelling needle has been successfully placed, according to this utility model. Figure 2 Sectional view of AA.

[0013] Figure 4 This is an embodiment of an arterial puncture needle that accurately and promptly indicates whether an indwelling needle has been successfully placed, according to this utility model. Figure 1 A magnified view of section II in the middle.

[0014] In the attached diagram: 1. Steel needle, 2. Indwelling needle tube, 3. Blood return guide hole, 4. Blood return indicator tube, 5. Blood return groove, 6. Blocker, 7. Heparin cap. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0016] Reference Appendix Figure 1 —4, is an embodiment of the arterial puncture needle of this utility model that accurately and timely indicates whether the indwelling needle has been successfully placed. It includes a steel needle 1 and an indwelling needle tube 2. A blood return guiding hole 3 is provided at the front end of the indwelling needle tube 2. A transparent blood return indicator tube 4, which is Y-shaped with the indwelling needle tube, is provided at the rear end of the indwelling needle tube 2. The blood return indicator tube 4 is connected to the inner lumen of the indwelling needle tube 2. An arrestor 6 is provided on the blood return indicator tube 4. A heparin cap 7 is provided at the end of the blood return indicator tube 4. A recessed blood return groove 5 is provided on the needle wall of the steel needle 1. The front end of the blood return groove 5 is aligned with and connected to the blood return guiding hole 3 on the indwelling needle tube 2. The rear end of the blood return groove 5 is aligned with and connected to the blood return indicator tube 4. The distance between the blood return guiding hole 3 and the front end of the indwelling needle tube 2 is set to 2-3 mm.

[0017] The working principle of this invention is as follows: When performing arterial puncture using this invention, after the indwelling needle is inserted into the artery, arterial blood flows from the blood return guide hole into the blood return groove on the side wall of the steel needle, and then into the transparent blood return indicator tube. At this time, the change in the color of the blood in the transparent blood return indicator tube and the pulsating phenomenon of the indicator tube can be clearly observed. By observing these phenomena, medical personnel can accurately and quickly determine that the indwelling needle has been successfully placed.

[0018] The puncture needle of this invention has its blood return guiding hole and blood return groove positioned at the very tip of the indwelling needle tube. This allows the blood flow (color change) and pulsation of the blood return indicator tube to be promptly and accurately observed once the indwelling needle tube enters the artery. Therefore, this invention provides accurate and timely guidance for medical personnel performing punctures, subtly helping them to remain calm and focused, thereby improving the efficiency of puncture and indwelling needle placement.

Claims

1. An arterial puncture needle that accurately and promptly indicates whether an indwelling needle has been successfully placed, comprising a steel needle and an indwelling needle tubing, characterized in that: The indwelling needle has a blood return guiding hole at the front end of its wall and a blood return indicator tube that is Y-shaped with the indwelling needle at the rear end of the indwelling needle. The blood return indicator tube is connected to the inner lumen of the indwelling needle. The needle wall of the steel needle has a recessed blood return groove. The front end of the blood return groove is aligned with and connected to the blood return guiding hole on the indwelling needle. The rear end of the blood return groove is aligned with and connected to the blood return indicator tube. An occluder is provided on the blood return indicator tube, and a heparin cap is provided at the end of the blood return indicator tube.

2. The arterial puncture needle according to claim 1, which accurately and promptly indicates whether the indwelling needle has been successfully placed, is characterized in that: The distance between the blood return guiding hole and the tip of the indwelling needle is set to 2-3 mm.

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