Dual lumen tubing for use across aortic valves

Abstract

The invention provides a double-cavity pipeline for a trans-aortic valve, the double-cavity pipeline is used for a patient subjected to vein-artery extracorporeal membrane oxygenation (VA-ECMO) treatment through femoral artery intubation, and the double-cavity pipeline comprises a first pipeline and a second pipeline; the first end and the second end of the first pipeline are both open; the first end of the first pipeline is used for entering the left ventricle after crossing the aortic valve of the heart of a subject, and the second end of the first pipeline is used for being connected with the ECMO pipeline venous catheter tee joint. The first end of the second pipeline is blocked, and the second end of the second pipeline is opened; a second side hole is formed near the first end of the second pipeline; the second side hole is located between the aortic valve and the brachial trunk of the subject, and the second end of the second pipeline is used for being connected with an ECMO pipeline arterial duct tee joint; the first pipeline and one part of the second pipeline are integrally formed; the first end of the first pipeline extends beyond the first end of the second pipeline to form an extension section.

Description

Technical Field

[0001] The present application relates to a tube for VA-ECMO treatment of patients, and in particular to a double-lumen tube for crossing the aortic valve. Background Art

[0002] For patients who undergo veno-arterial extracorporeal membrane oxygenation (VA-ECMO) therapy via femoral artery cannulation, the arterial blood returned by ECMO is in the opposite direction to the forward arterial blood pumped out by the heart. The returned arterial blood will hinder the further outflow of the arterial blood pumped out by the heart. These two fluids form a counter-flow plane, and the position of this plane is related to cardiac function. The better the cardiac function, the farther away from the aortic sinus. When VA-ECMO patients have pulmonary diseases and abnormal pulmonary oxygen exchange, the forward blood flow pumped out from the heart after passing through the pulmonary circulation has low oxygen content. This part of the blood flow is affected by the counter-flow plane and supplies the heart, brain and upper body of the patient, resulting in the "North-South Syndrome" common in VA-ECMO patients.

[0003] Patients who receive veno-arterial extracorporeal membrane oxygenation (VA-ECMO) via femoral artery catheterization may have difficulty or be unable to eject blood from the left heart if their heart function is poor, leading to left heart enlargement and serious complications such as severe left ventricular thrombosis. Summary of the invention

[0004] In view of the above problems, the present application aims to propose a double-lumen catheter for crossing the aortic valve, which, on the one hand, solves the problem of difficulty or inability to eject blood from the left heart in patients undergoing veno-arterial extracorporeal membrane oxygenation therapy via femoral artery catheterization, and on the other hand, solves the problem of "North-South syndrome" in patients undergoing veno-arterial extracorporeal membrane oxygenation therapy via femoral artery catheterization.

[0005] The double-lumen tube for crossing the aortic valve of the present application is used for patients who undergo veno-arterial extracorporeal membrane oxygenation therapy via femoral artery cannulation, and comprises: a first tube, a second tube; The first end and the second end of the first pipeline are both open; the first end of the first pipeline is used to cross the aortic valve of the subject's heart and enter the left ventricle, and the second end of the first pipeline is used to connect to the ECMO pipeline venous tube tee to draw blood in the subject's left ventricle into the ECMO pipeline venous tube; The first end of the second pipeline is blocked, and the second end of the second pipeline is open; a second side hole is formed near the first end of the second pipeline; the second side hole is located between the aortic valve and the brachiocephalic trunk of the subject, and the second end of the second pipeline is used to connect the ECMO pipeline arterial tube tee to perfuse the oxygen-rich arterial blood in the ECMO pipeline arterial tube into the ascending aorta of the subject; The first pipeline is integrally formed with a portion of the second pipeline, and the integrally formed portion starts from the first end of the second pipeline to a position close to the second end of the second pipeline; the first end of the first pipeline extends beyond the first end of the second pipeline to form an extension section.

[0006] Preferably, the stretch of first tubing is crimped after entering the left ventricle of the subject.

[0007] Preferably, the extension section is provided with a plurality of first side holes.

[0008] Preferably, the plurality of first side holes are distributed along the length direction of the extension section and face different directions.

[0009] Preferably, the first end of the first tube is provided with a first marker to display the position of the first end of the first tube under radiation.

[0010] Preferably, a second marker is provided at the second side hole of the second pipeline to display the position of the second side hole of the second pipeline under X-ray.

[0011] Preferably, the second ends of the first and second conduits are separated.

[0012] Preferably, the outer peripheral surface of the portion where the first pipeline and the second pipeline are integrally formed is a smooth cylindrical surface.

[0013] Preferably, in the portion where the first pipeline and the second pipeline are integrally formed, a tapered transition portion is formed at the first end of the second pipeline.

[0014] The double-lumen tube for crossing the aortic valve of the present application utilizes two tubes to be connected to ECMO respectively, so as to achieve the suction of blood from the left ventricle of the subject and the supply of nutrient-rich blood to the ascending aorta, thereby alleviating left ventricular function and avoiding the occurrence of "North-South Syndrome". BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the double-lumen tube used to cross the aortic valve of the present application.

[0016] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of a double-lumen tube for crossing the aortic valve.

[0017] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of a double-lumen tube used to cross the aortic valve. DETAILED DESCRIPTION

[0018] Below, the present application is described in detail with reference to the accompanying drawings.

[0019] The double-lumen catheter for crossing the aortic valve of the present application is used for patients who undergo veno-arterial extracorporeal membrane oxygenation therapy via femoral artery catheterization, and comprises: a first catheter 1 and a second catheter 2.

[0020] The first end and the second end of the first pipeline 1 are both open. The first end of the first pipeline 1 is used to cross the aortic valve of the subject's heart and enter the left ventricle, and the second end of the first pipeline 1 is used to connect the ECMO line venous tube tee to draw blood in the subject's left ventricle into the ECMO line venous tube.

[0021] The first end of the second pipeline 2 is blocked, and the second end of the second pipeline 2 is open; a second side hole 21 is formed near the first end of the second pipeline 2; the second side hole 21 is located between the aortic valve and the brachiocephalic trunk of the subject, and the second end of the second pipeline 2 is used to connect to the ECMO pipeline arterial tube tee to perfuse the oxygen-rich arterial blood in the ECMO pipeline arterial tube into the ascending aorta of the subject.

[0022] The first pipeline 1 is integrally formed with a portion of the second pipeline 2, and the integrally formed portion 3 starts from the first end of the second pipeline 2 to a position close to the second end of the second pipeline 2; the first end of the first pipeline 1 extends beyond the first end of the second pipeline 2 to form an extension section 11.

[0023] The extended section 11 of the first tubing 1 is curled after entering the left ventricle of the subject, similar to a pigtail catheter.

[0024] The extension section 11 defines a plurality of first side holes 12 .

[0025] The plurality of first side holes 12 are distributed along the length direction of the extension section 11 and face different directions.

[0026] The first end of the first pipeline 1 is provided with a first marker 13 to display the position of the first end of the first pipeline 1 under X-rays, so as to facilitate the user to determine whether the first end of the first pipeline is in a suitable position.

[0027] A second marker 22 is provided at the second side hole 21 of the second pipeline 2 to display the position of the second side hole 21 of the second pipeline 2 under X-ray, so as to facilitate the user to determine that the second side hole of the second pipeline is in an appropriate position.

[0028] The second ends of the first pipeline 1 and the second pipeline 2 are separated to facilitate the connection to the venous tube tee or arterial tube tee of the ECMO pipeline respectively.

[0029] The outer peripheral surface of the portion 3 where the first pipeline 1 and the second pipeline 2 are integrally formed is a smooth cylindrical surface.

[0030] In the portion 3 where the first pipeline 1 and the second pipeline 3 are integrally formed, a tapered transition portion is formed at the first end of the second pipeline 2 to facilitate smooth placement of the entire pipeline into the subject's blood vessel.

[0031] When in use, first insert the guide wire into the left ventricle of the subject, then put the first pipeline on the guide wire, follow the guide wire to pass the extension section of the first pipeline across the aortic valve and enter the left ventricle of the subject, then withdraw the guide wire, and the extension section remains in the left ventricle. After the guide wire is withdrawn, the extension section bends in the left ventricle, so that the first side hole of the extension section is distributed as much as possible in various parts of the left ventricle, so as to facilitate the full suction of blood in the left ventricle. Use the first marker and the second marker to confirm under radiation that the first end of the first pipeline and the second side hole of the second pipeline are located in the appropriate position, that is, the first marker is located in the left ventricle when it is developed under radiation, and the second marker is located between the aortic valve and the brachiocephalic trunk when it is developed under radiation. Connect the second end of the first pipeline and the second end of the second pipeline to the corresponding venous tube tee or arterial tube tee of the ECMO pipeline, so that the ECMO pipeline can be used to suction blood from the left ventricle and supply blood to the ascending aorta.

Claims

1. A double-lumen tube for crossing the aortic valve, which is used for patients undergoing veno-arterial extracorporeal membrane oxygenation therapy via femoral artery cannulation, comprising: A first pipeline and a second pipeline; The first end and the second end of the first pipeline are both open; The first end of the first tube is used to cross the aortic valve of the subject's heart and enter the left ventricle, and the second end of the first tube is used to connect to the venous tube tee of the ECMO tube to draw blood in the left ventricle of the subject into the venous tube of the ECMO tube; The first end of the second pipeline is blocked, and the second end of the second pipeline is open; a second side hole is formed near the first end of the second pipeline; The second side hole is located between the aortic valve and the brachiocephalic trunk of the subject, and the second end of the second pipeline is used to connect to the ECMO pipeline arterial tube tee to perfuse the oxygen-rich arterial blood in the ECMO pipeline arterial tube into the ascending aorta of the subject; The first pipeline is integrally formed with a portion of the second pipeline, and the integrally formed portion starts from the first end of the second pipeline to a position close to the second end of the second pipeline; the first end of the first pipeline extends beyond the first end of the second pipeline to form an extension section.

2. The double-lumen conduit for crossing the aortic valve according to claim 1, characterized in that: The extension of the first tubing is crimped after entering the left ventricle of the subject.

3. The double-lumen conduit for crossing the aortic valve according to claim 2, characterized in that: The extension section is provided with a plurality of first side holes.

4. The double-lumen conduit for crossing the aortic valve according to claim 3, characterized in that: The plurality of first side holes are distributed along the length direction of the extension section and face different directions.

5. The double-lumen conduit for crossing the aortic valve according to claim 1, characterized in that: The first end of the first tube is provided with a first marker to show the position of the first end of the first tube under radiation.

6. The double-lumen conduit for crossing the aortic valve according to claim 1, characterized in that: A second marker is arranged at the second side hole of the second pipeline to display the position of the second side hole of the second pipeline under X-ray.

7. The double-lumen conduit for crossing the aortic valve according to claim 1, characterized in that: The second ends of the first and second conduits are separated.

8. The double-lumen catheter for crossing the aortic valve according to claim 7, characterized in that: The outer peripheral surface of the portion where the first pipeline and the second pipeline are integrally formed is a smooth cylindrical surface.

9. The double-lumen conduit for crossing the aortic valve according to claim 1, characterized in that: In the portion where the first pipeline is integrally formed with the second pipeline, a tapered transition portion is formed at the first end of the second pipeline.

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