Needle Assembly

Abstract

The invention relates to a puncture needle assembly, including a puncture needle, a guide wire, a sheath with a dilator, and a three-dimensional stereotaxic positioning device. The guide wire is arranged inside the puncture needle to form an integrated guide wire-shaped solid-core puncture needle. The guide wire-shaped solid-core puncture needle is respectively connected with the sheath tube with dilator and the three-dimensional stereotaxic positioning device. The present invention can be used to complete interventricular septal puncture and atrial septal puncture through venous puncture, effectively solves the problems existing in the prior art, can realize unrestricted selection of the peripheral vascular approach of the pre-operative site, and can make the puncture target The space position selection and the walking direction of the puncture needle tip are effectively restricted and accurately positioned objectively, and the two-step operation of the puncture needle puncture through the septum and the establishment of the guide wire track can be completed in one step, and the operation is safe and easy, greatly reducing the technical difficulty of operation. Completely avoid the risk of operational technical errors, and fully avoid the risks of ventricular free wall perforation and cardiac tamponade.

Description

technical field [0001] The invention relates to the technical field of devices used for clinical interventional diagnosis and treatment of cardiovascular medicine, in particular to a puncture needle assembly used to complete interventricular septal puncture and atrial septal puncture through venous puncture. Background technique [0002] There are two main types of puncture needle assemblies commonly used in clinical practice of modern interventional cardiology: short puncture needle assemblies and long puncture needle assemblies. puncture. [0003] A short puncture needle assembly for peripheral vascular catheterization, including a short puncture needle, a short guide wire, and a vascular sheath with a dilator. When performing percutaneous peripheral vascular puncture catheterization (Seldinger technique), a short puncture needle is used to percutaneously puncture into the vascular lumen first, and after the blood is withdrawn smoothly to confirm that the needle tip is in...

AI Technical Summary

Problems solved by technology

[0005] The main disadvantage of using the existing long puncture needle assembly in atrial septal puncture is that the selection and positioning of the puncture point are completely dependent on the operator's subjective consciousness and manual operation, and objective and accurate positioning cannot be performed. Atrial septal puncture The randomness of point selection is large, and there is a possibility of bias or even error, which can easily cause many problems of mispuncture, such as: (1) The location of the atrial septal puncture point is not ideal, although the atrial septal puncture has been successful, the puncture target is indeed located in the atrial septum Above, the long guide wire track has been established, and the atrial septum puncture sheath can smoothly cross the atrial septum from the right atrium side to the left atrium side, and the sheath track can be established, but if the puncture point is in the space The location is not close to the center of the atrial septum, but too close to the junction of the atrial septum and the free wall of the left atrium. Because the sheath tube itself is relatively straight and hard, and due to the limitation of the angle, the atrial septal puncture hole as a passageway has little effect on the access of instruments. The operation is affected, and sometimes it can lead to the inability to complete the next step of interventional surgery. It is often necessary to re-puncture the atrial septum to make the puncture point closer to the central area of ​​the atrial septum to complete the next step of interventional surgery

(2) The direction of the puncture needle is not correct, which will not only result in unsuccessful puncture, but also may cause serious complications and even death

If the free wall of the atrium is pierced by mistake, on the one hand, the puncture is unsuccessful, and the guide wire track and the sheath track from the right atrium side across the atrial septum to the left atrium side cannot be established, and at the same time, it will cause traumatic puncture complications, which can cause atrial dissociation Serious consequences such as wall perforation and cardiac tamponade sometimes threaten the life of the patient because of untimely discovery or improper treatment; such as aortic puncture by mistake, on the one hand, the puncture is unsuccessful, and it is impossible to establish a bridge from the right atrium across the interatrial septum The guide wire track and the sheath track on the left atrium side cause traumatic puncture complications at the same time, which can cause aorto-right atrium fistula and iatrogenic left-to-right shunt structural heart disease; (3) puncture is unsuccessful At this time, the puncture needle traveled forward for a certain distance from the right atrium side from the puncture target selected by the operator, but the needle tip neither passed through the atrial septum to the left atrial cavity, nor entered the aortic cavity, nor The free wall of the atrium was pierced to reach the pericardial cavity, but it walked in the interstitial tissue of the heart, and it was difficult to try to feed the guide wire. The injection of contrast agent along the puncture needle showed that the contrast agent remained locally at the needle tip and did not dissipate; it had to be adjusted Re-operate after puncturing the direction of needle travel, sometimes it takes repeated attempts

[0006] In addition, the use of the existing long puncture needle assembly also has the following disadvantages in the atrial septal puncture technique: it requires extremely high precision for the operator, and it is a difficult operation technique, especially the second step of the puncture needle during the operation. The connection between the septum and the third step of establishing the guide wire track requires extremely high precision. Due to the straight and hard characteristics of the puncture needle, the operator must be careful to grasp the needle tip of the puncture needle in the left atrium after passing through the atrial septum. If the puncture needle travels too far in the left atrium cavity, the needle tip may cause damage to the contralateral left atrium free wall; The beating of the needle tip that has entered the left atrium may retreat into the right atrium, resulting in the failure to establish the follow-up guide wire track and requiring re-puncture

However, in animal experiments, there were some cases where individual surgeons managed to successfully achieve the success of interventional septal puncture by referring to the atrial septal puncture technique, using the atrial septal puncture needle assembly, and selecting a restricted vascular approach, but it could not be widely carried out, let alone applied. clinical human practice

As for the short puncture needle assembly, it is the same as the long puncture needle assembly in the process of being used for peripheral vascular puncture and catheterization. Because the short puncture needle body is straight and hard, it cannot be bent, and the assembly lacks a positioning device, which often causes puncture points. Inaccurate, large running direction deviation and other problems, which lead to the failure of the overall puncture

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