CN110624144A

CN110624144A - Artificial heart intubation joint for preventing ventricular wall obstruction

Info

Publication number: CN110624144A
Application number: CN201910975287.2A
Authority: CN
Inventors: 高斌; 张琪; 常宇
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2018-12-29
Filing date: 2019-10-14
Publication date: 2019-12-31
Also published as: CN109731168A

Abstract

An artificial heart intubation tube joint for preventing ventricular wall obstruction belongs to the field of biomedical engineering. The joint consists of a drainage tube, a bracket and a suture ring. Wherein the bracket is fixed on the outer wall of the front section of the drainage tube, and the drainage tube and the bracket extend into the left ventricle; the bracket is used for fixing the drainage tube in the ventricle and supporting the ventricle wall to prevent the ventricle wall from blocking the inlet of the drainage tube; the drainage tube is used for drawing blood from the left ventricle into the artificial heart; the suture ring is fixed on the outer layer of the drainage tube and is used for suturing the cardiac muscle and fixing the whole joint. The invention can effectively solve the problem that the ventricular wall blocks the inlet of the artificial heart, improve the stability of the artificial heart and reduce the influence of ventricular suction on the artificial heart.

Description

Artificial heart intubation joint for preventing ventricular wall obstruction

Technical Field

The invention relates to an artificial heart intubation tube joint for preventing ventricular wall obstruction, and belongs to the field of biomedical engineering.

Background

Artificial hearts have become one of the more effective methods of treating heart failure, and in clinical applications, artificial hearts draw blood through a cannula inserted into the left ventricle and pump it into the systemic circulation. The traditional artificial heart inlet cannula is mainly fixed with the cardiac muscle in a suture mode, and the drainage tube has no protective measures inside the cardiac muscle. Due to the suction effect of the artificial heart, a low-pressure area can be generated at the cannula inlet, so that the nearby ventricular wall is attracted to be close to the cannula inlet, the cannula inlet is blocked, the blood supply of the artificial heart is interrupted, and the life of a patient is directly threatened.

Disclosure of Invention

The invention aims to design an artificial heart intubation tube joint for preventing the wall of a heart chamber from being blocked, and solves the problems in the prior art.

The invention solves the technical problem by adopting the technical scheme that an artificial heart intubation tube joint for preventing the ventricular wall from being blocked specifically refers to a picture 1, and comprises a support (1), a drainage tube (2) and a suture ring (3).

The bracket (1) is positioned in the ventricle; the support (1) is of a hollow central shaft symmetrical structure and comprises an upper part and a lower part, wherein the upper part is a peripheral circular ring side inclined plane of a circular truncated cone A, the lower part is a peripheral circular ring side inclined plane of a circular truncated cone B, the diameter of an upper port corresponding to the circular truncated cone A is smaller than that of a lower port, the diameter of an upper port corresponding to the circular truncated cone B is larger than that of the lower port, the diameter of a large port corresponding to the circular truncated cone A is equal to that of a large port corresponding to the circular truncated cone B, the diameter of a small port corresponding to the circular truncated cone A is equal to that of a small port corresponding to the circular truncated cone B, and the large port corresponding to the circular truncated; the small port corresponding to the round table B is jointed with the ventricular wall (4); one end of the drainage tube (2) extends into the ventricle from the outside of the ventricle, sequentially passes through the small port corresponding to the circular truncated cone B and reaches the small port corresponding to the circular truncated cone A; at the joint of the ventricular external drainage tube (2) and the ventricular wall (4), the periphery of the drainage tube (2) is sleeved with a suture ring (3) which is fixed with the drainage tube (2) into an integral structure, and the suture ring (3) is fixedly connected with the ventricular wall (4) together, so that the drainage tube (2) is fixed with the ventricle into an integral body; a bend angle is arranged on the ventricular outside drainage tube (2).

Preferably, the height of the circular truncated cone A is greater than that of the circular truncated cone B.

The diameter of the small port corresponding to the round table B is equal to the outer diameter of the drainage tube (2).

The central shaft of the drainage tube (2) is vertical to the ventricular wall (4) at the joint of the drainage tube (2) and the ventricular wall (4).

The bend angle of the drainage tube (2) is a bend angle which is suitable for the heart anatomical structure, the angle range is 30-90 degrees, and the material of the bend angle is titanium alloy material.

Along the radial direction, the space between the bracket (1) and the drainage tube (2) is hollow.

The support (1) is formed by weaving memory metal wires to form a compressible support. The support is fixed in drainage tube anterior segment outer wall, and the mid portion expands along the drainage tube radial direction for the position of fixed myocardium and drainage tube prevents that the drainage tube from taking place the skew or myocardium pincher trees from blockking up the drainage tube entry.

The drainage tube is used for drawing blood from the ventricle into the artificial heart; the suture ring is fixed on the outer wall of the drainage tube and used for suturing the cardiac muscle, and the suture ring is made of an artificial blood vessel material.

The device effectively solves the problem that the ventricular wall blocks the inlet of the artificial heart, improves the stability of the artificial heart, and reduces the influence of ventricular suction on the artificial heart.

Drawings

Fig. 1. an artificial heart intubation tube joint for preventing obstruction of ventricular wall

1. A support; 2. a drainage tube; 3. a suture ring; 4. the ventricular wall.

Detailed Description

The present invention will be further illustrated with reference to the following examples, but the present invention is not limited to the following examples.

Example 1

In the artificial heart intubation tube joint for preventing the ventricular wall from being blocked, the support is formed by weaving the memory alloy wires, and the diameter of the alloy wires is 0.2 mm. The middle part of the stent expands outwards along the outer diameter of the drainage tube, the expansion diameter is 10mm, and the height of the stent is 20 mm; the diameter of the connecting bent pipe is 16mm, the length of the connecting bent pipe is 40mm, and the wall thickness of the bent angle is 50 degrees and 1 mm; the suture ring is made of artificial blood vessel material, and has an inner diameter of 16mm, an outer diameter of 18mm and a height of 2 mm. Through in vitro experiment and animal experiment research, after artificial heart suction degree increased, ventricular wall moved towards the drainage tube entry, but was supported by the support, had avoided ventricular wall to block the drainage tube entry to because there is the support to support, artificial heart entry intubate can be fixed on the ventricular wall, does not take place to remove. The in vitro experimental data are as follows, wherein the pumping degree of the artificial heart is represented by the blood volume of the artificial heart, the range is 3-6L/min, the average value of the distance between the myocardium and the central point of the inlet pipeline of the artificial heart in the coverage range of the stent is used as the effectiveness index of the invention, and the results are shown in table 1:

Claims

1. an artificial heart intubation tube joint for preventing the wall of a heart ventricle from being blocked is characterized by comprising a bracket (1), a drainage tube (2) and a suture ring (3);

2. The artificial heart cannula connector for preventing obstruction of a ventricular wall according to claim 1 wherein the height of boss a is greater than the height of boss B.

3. An artificial heart intubation tube connection for preventing obstruction of the ventricular wall according to claim 1, wherein the diameter of the corresponding small end of the truncated cone B is equal to the outer diameter of the drainage tube (2).

4. An artificial heart intubation tube connection for preventing obstruction of the ventricular wall according to claim 1, wherein the central axis of the drainage tube (2) is perpendicular to the ventricular wall (4) at the connection of the drainage tube (2) to the ventricular wall (4).

5. The artificial heart intubation tube connector for preventing the wall of the heart chamber from being blocked according to claim 1, wherein the angle of the drainage tube (2) is a bending angle corresponding to the anatomical structure of the heart, the angle ranges from 30 degrees to 90 degrees, and the material of the bending angle is titanium alloy material.

6. An artificial heart intubation tube connection for preventing obstruction of the ventricular wall according to claim 1, characterized in that, in the radial direction, the space between the stent (1) and the drainage tube (2) is hollow.