Left heart drainage cannula

Abstract

The invention discloses a left heart drainage cannula, and belongs to the technical field of medical instruments, the left heart drainage cannula comprises a drainage cannula body, the drainage cannula body comprises a drainage tube straight section, the two ends of the drainage tube straight section are provided with a first bending part and a second bending part, and the first bending part and the second bending part are bent in the same direction; wherein the straight section of the drainage tube is the left atrium part of the drainage tube, the first bent part is the extracardiac part of the drainage tube, and the second bent part is the part of the drainage tube entering the ventricle; a plurality of drainage holes are formed in the circumferential direction of the second bending part; the light source is arranged at the end, away from the straight section of the drainage tube, of the second bent part; the wire is arranged on the inner wall of the drainage cannula body, one end of the wire is electrically connected with the light source, and the other end of the wire extends to the outer side of the drainage cannula body and is electrically connected with a power source. The problems that in a cardiac surgery, a left heart drainage tube is difficult to indwelling and prone to displacement or disengagement, surgery field light is insufficient, and the pressure in the left ventricle cannot be measured are solved, and the surgery efficiency and safety are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and specifically refers to a device used for extracorporeal circulation in cardiac surgery, and relates to a left heart drainage cannula. Background Art

[0002] In most heart surgeries (valve surgery, very warm coronary artery bypass grafting and cardiomyopathy surgery, etc.), it is necessary to establish extracorporeal circulation to stop the heart and facilitate surgery. In addition to large vessel catheterization of the aorta, superior and inferior vena cava, some surgeries also require the placement of a drainage tube in the left atrium / ventricle through the right superior pulmonary vein. The depth and suction are adjusted according to surgical needs to continuously drain the bleeding and exudate in this area, thereby ensuring a clear surgical field. Due to the anatomical relationship of the heart, the difficulty of placing a left heart drainage tube is significantly higher than other drainage catheters.

[0003] The left heart drainage tubes currently used are all straight tubes with a hard guide wire attached to the lumen to maintain their shape. During the intubation process, the surgeon needs to adjust the angle in advance based on experience so that they can be inserted into the left atrium / ventricle. Since the catheterization route is tortuous and cannot be viewed directly, it is difficult to achieve the ideal angle with existing technology, so the catheterization process is very difficult. On the other hand, after successful catheterization, even with purse-string suture fixation, the left ventricular drainage tube often shifts or even falls out during several hours of heart surgery, resulting in unclear surgical field, and frequent adjustment of its position or re-catheterization is required, which seriously affects the progress of the operation. In addition, the left ventricle is located deep and has a poor field of vision. Even with an assistant retractor exposure, it is still difficult for external light to reach the left ventricular surgical field. The surgeon needs to frequently adjust the position of the surgical light to ensure a clear surgical field, which brings difficulties to the operation.

[0004] At the same time, the left heart drainage tube cannot measure the pressure in the left ventricle, and cannot promptly and accurately judge the heart function before the extracorporeal circulation tube is removed after the heart is restarted. Summary of the invention

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] A left heart drainage cannula, comprising:

[0007] A drainage cannula body, the drainage cannula body comprising a straight section of the drainage tube, a first bending portion and a second bending portion are provided at both ends of the straight section of the drainage tube, the first bending portion and the second bending portion are bent in the same direction; wherein the straight section of the drainage tube is the left atrium portion of the drainage tube, the first bending portion is the extracardiac portion of the drainage tube, and the second bending portion is the portion of the drainage tube entering the ventricle; the second bending portion is circumferentially provided with a plurality of drainage holes;

[0008] A light source, the light source being arranged at an end of the second bent portion away from the straight section of the drainage tube;

[0009] A conducting wire is arranged on the inner wall of the drainage cannula body, one end of the conducting wire is electrically connected to the light source, and the other end of the conducting wire extends to the outside of the drainage cannula body and is electrically connected to a power source.

[0010] Furthermore, it also includes:

[0011] A floating catheter head, the floating catheter head being arranged at an end of the second bent portion away from the straight section of the drainage tube;

[0012] A connecting line is arranged on the inner wall of the drainage cannula body, one end of the connecting line is communicated with the floating catheter head, and the other end of the connecting line extends to the outside of the drainage cannula body.

[0013] Furthermore, the light source is arranged opposite to the head of the floating catheter, and the light source is located on the inner side of the second bending portion.

[0014] Furthermore, a first angle between the first bent portion and the straight section of the drainage tube is 120°; a second angle between the second bent portion and the straight section of the drainage tube is 135°.

[0015] Furthermore, the drainage hole is elliptical.

[0016] Furthermore, a supporting guide wire is arranged in the drainage cannula body.

[0017] Beneficial effects:

[0018] 1. The present invention solves the problems of difficulty in placing the left heart drainage tube, easy displacement or dislocation, insufficient light in the surgical field, and inability to measure the left ventricular pressure during cardiac surgery, comprehensively improves the use effect of the left heart drainage tube in cardiac surgery, reduces the difficulty of surgery, and improves the efficiency and safety of surgery.

[0019] 2. By setting specific angles and shapes in advance, the difficulty of left ventricular cannulation is greatly reduced, and the stability of left heart cannulation is increased, ensuring a clear surgical field and avoiding possible intracardiac damage caused by frequent adjustments of the pipeline.

[0020] 3. By adding a light source module, the present invention can provide a light source for the left ventricular surgical field, making it easier for the operator to observe the intracardiac structure more clearly.

[0021] 4. By adding a pressure measurement module, the present invention can timely and accurately measure the left ventricular pressure before extracorporeal circulation tube removal, and quickly evaluate the patient's cardiac function and surgical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the overall structure of the left heart drainage cannula provided by the present invention;

[0023] Among them, 1-guide wire; 2-extracorporeal circulation pipeline connection part; 3-connecting line; 4-first bending part; 5-first angle; 6-straight section of drainage tube; 7-second angle; 8-second bending part; 9-light source; 10-floating catheter head. DETAILED DESCRIPTION

[0024] Example 1

[0025] refer to Figure 1 , a left heart drainage cannula, comprising:

[0026] The drainage cannula body includes a drainage tube straight section 6, and the two ends of the drainage tube straight section 6 are provided with a first bending portion 4 and a second bending portion 8, and the first bending portion 4 and the second bending portion 8 are bent in the same direction; wherein the drainage tube straight section 6 is the left atrium part of the drainage tube, and different models can be selected according to the size of the heart, the first bending portion 4 is the extracardiac part of the drainage tube, and the second bending portion 8 is the part of the drainage tube entering the ventricle; the second bending portion 8 is circumferentially provided with a plurality of drainage holes;

[0027] A light source 9, which is disposed at an end of the second bent portion 8 away from the straight section 6 of the drainage tube;

[0028] The wire 1 is arranged on the inner wall of the drainage cannula body, one end of the wire 1 is electrically connected to the light source 9, and the other end extends to the outside of the drainage cannula body and is electrically connected to the power source.

[0029] Specifically, the end of the first bent portion 4 away from the straight section 6 of the drainage tube is the extracorporeal circulation pipeline connecting portion 2.

[0030] This embodiment adds a light source module to provide a light source for the left ventricular surgical field, so that the operator can observe the intracardiac structure more clearly.

[0031] The left heart drainage cannula provided in this embodiment also includes:

[0032] A floating catheter head 10, which is arranged at the end of the second bending portion 8 away from the straight section 6 of the drainage tube;

[0033] The connecting line 3 is arranged on the inner wall of the drainage cannula body, one end of the connecting line 3 is connected to the floating catheter head 10, and the other end extends to the outside of the drainage cannula body.

[0034] In this embodiment, the light source 9 is disposed opposite to the floating catheter head 10 , and the light source 9 is located on the inner side of the second bending portion 8 .

[0035] This embodiment adds a pressure measurement module (floating catheter head 10), which can timely and accurately measure the left ventricular pressure before extracorporeal circulation tube removal, and quickly evaluate the patient's cardiac function and surgical effect.

[0036] In this embodiment, the first angle 5 between the first bend 4 and the straight section 6 of the drainage tube is 120°, corresponding to the right upper pulmonary vein; the second angle 7 between the second bend 8 and the straight section 6 of the drainage tube is 135°, corresponding to the mitral valve.

[0037] This embodiment greatly reduces the difficulty of the left ventricular cannulation process by setting specific angles and shapes in advance, and increases the stability of the left heart cannulation, ensures a clear surgical field, and avoids possible intracardiac damage caused by frequent adjustments of the pipeline.

[0038] In this embodiment, the drainage hole is elliptical.

[0039] In this embodiment, a supporting guide wire is disposed in the drainage cannula body.

[0040] The left heart drainage cannula provided in this embodiment consists of two parts: a drainage cannula body and a supporting guide wire. Specifically, the left heart drainage cannula can be divided into four parts, from the handheld end to the inner heart end: the first part is the pipeline connection part, through which the above-mentioned supporting guide wire is inserted, and after the cannula is successfully placed, the drainage cannula body is also connected to the extracorporeal circulation pipeline through this part; the second part is the light source part, which includes a power supply and a light source switch; the third part is the bending part, which is designed to bend according to the anatomical characteristics of the right upper pulmonary vein and the mitral valve, and a variety of models can be set to adapt to hearts of different sizes by adjusting the distance between the two bends; the fourth part is the interior of the ventricle, which mainly includes several elliptical holes for drainage, a light source and a pressure measurement system.

[0041] Among them, the support guide wire selected in this embodiment is harder than the current guide wire material. After being inserted into the drainage cannula body, the entire left ventricular drainage tube can be made straight, which is convenient for cannulation.

[0042] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A left heart drainage cannula, characterized in that: include: A drainage cannula body, the drainage cannula body comprising a straight section of the drainage tube, a first bending portion and a second bending portion are provided at both ends of the straight section of the drainage tube, the first bending portion and the second bending portion are bent in the same direction; wherein the straight section of the drainage tube is the left atrium portion of the drainage tube, the first bending portion is the extracardiac portion of the drainage tube, and the second bending portion is the portion of the drainage tube entering the ventricle; the second bending portion is circumferentially provided with a plurality of drainage holes; A light source, the light source being arranged at an end of the second bent portion away from the straight section of the drainage tube; A conducting wire is arranged on the inner wall of the drainage cannula body, one end of the conducting wire is electrically connected to the light source, and the other end of the conducting wire extends to the outside of the drainage cannula body and is electrically connected to a power source.

2. The left heart drainage cannula according to claim 1, characterized in that: Also includes: A floating catheter head, the floating catheter head being arranged at an end of the second bent portion away from the straight section of the drainage tube; A connecting line is arranged on the inner wall of the drainage cannula body, one end of the connecting line is communicated with the floating catheter head, and the other end of the connecting line extends to the outside of the drainage cannula body.

3. The left heart drainage cannula according to claim 2, characterized in that: The light source is arranged opposite to the head of the floating catheter, and the light source is located inside the second bending portion.

4. The left heart drainage cannula according to claim 1, characterized in that: A first angle between the first bent portion and the straight section of the drainage tube is 120°; a second angle between the second bent portion and the straight section of the drainage tube is 135°.

5. The left heart drainage cannula according to claim 1, characterized in that: The drainage hole is elliptical.

6. The left heart drainage cannula according to claim 1, characterized in that: A supporting guide wire is arranged in the drainage cannula body.

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