9 results about "Coronary Vein" patented technology

To provide a surgical method using a catheter that enables delivery of a drug to a human heart.SOLUTION: In a surgical method of delivering chemical liquid to a cardiac muscle cell, a catheter 1 having a lumen 1L, a side opening OP communicating the lumen 1L with the outside, and a radiopaque marker M indicating a position of the side opening OP is inserted to at least one of a coronary artery and a coronary vein, the catheter 1 is rotated while checking the marker M such that an orientation of the side opening becomes a predetermined orientation, a puncture needle 21 is made to project from the side opening OP in a state where the side opening OP is in the predetermined orientation, thereby, the puncture needle 21 is stuck to a cardiac muscle as a treatment target portion, and chemical liquid 50 containing a cell for treatment is injected to the cardiac muscle from the puncture needle 21.SELECTED DRAWING: Figure 1

The invention discloses a transjugular vein intervention type retrograde coronary sinus drug delivery catheter system, and relates to the technical field of catheters.The transjugular vein intervention type retrograde coronary sinus drug delivery catheter system comprises an injection base, a catheter and a balloon, the catheter comprises an air pipe and an infusion pipe which are integrally arranged, one end of the air pipe is connected to the injection base, the other end of the air pipe is connected with the balloon, and the balloon is used for blocking coronary sinus of the heart of a patient; the external end of the air tube can inject or extract air, one end of the infusion tube is connected to the injection base, the other end of the infusion tube is located in the heart of a patient, and the infusion tube penetrates through the balloon, is in sealed connection with the end of the balloon and is used for injecting liquid medicine or virus solution. The balloon can be used for blocking coronary sinus for a period of time to block venous circulation, and then the catheter is used for retrograde injection of awns or viruses into a coronary vein system, so that drugs directly act on myocardial tissues for a period of time, the local action time of the drugs is prolonged, the treatment efficiency is improved, systematic toxic and side effects are reduced, thoracotomy is not needed, and the treatment cost is reduced. The operation is more convenient.

This medical system is provided with: a drug solution containing cells and / or a low-molecular compound; and a puncture needle for injecting the drug solution into the myocardium via at least one of a human coronary artery and a coronary vein.

A surgical method for delivering a drug solution to myocardium includes the steps of: inserting a catheter into at least one of a coronary artery and a coronary vein, the catheter having a lumen, a lateral opening connecting the lumen and outside of the catheter, and a radiopaque marker indicating a position of the lateral opening; rotating the catheter while observing the marker such that an orientation of the lateral opening becomes a predetermined orientation with respect to a treatment target site; projecting a puncture needle through the lateral opening; piercing a myocardium of the treatment target site with the puncture needle; and injecting a drug solution containing therapeutic cells or chemical compounds from the puncture needle into the myocardium.

The invention discloses a coronary vein pulse ablation catheter which comprises a flexible catheter. The flexible conduit forms a plurality of bent sides in a natural state, and the bent sides are sequentially connected and extend along the axial direction of the flexible conduit; a plurality of electrodes are mounted on the bent side and used for releasing a pulsed electric field to ablate a target area; the supporting piece is inserted into the inner side of the flexible catheter, the bent side is deformed when the inner side of the flexible catheter is in a stressed state, and the whole flexible catheter is in a linear shape. After the flexible catheter reaches the target area, the supporting piece is moved out, and the flexible catheter is reset in a natural state and makes contact with the target area; the device adopts a prefabricated flexible catheter which has restorability, after the device is sent into a target area through a supporting piece, the supporting piece is moved out, the catheter is made to deform and recover in a natural state, at the moment, the device is adaptive to a certain bending degree according to the condition in a blood vessel, multiple contact sites are generated between the device and the blood vessel wall, and ablation is conducted after it is judged that the catheter is attached to the target area. And the ablation effect is better.

The present invention discloses an alcohol ablation catheter and an adjustable bending delivery system with a mapping electrode, aiming to solve the technical problem of reducing the difficulty of the catheter entering the coronary vein. The first catheter of the present invention is provided with a distal electrode and a double-hole tube starting from the distal end. The wall of the double-hole tube is provided with holes. In the free state, the distal end of the double-hole tube is L-shaped. The surface of the double-hole tube is provided with a first ring electrode. An alcohol ablation catheter is provided, which is provided with a second catheter and a wire splitter from the distal end to the proximal end. The wire splitter is connected with an inflation valve. The outer wall of the second catheter is provided with a second ring electrode, a balloon, and the distal end of the second catheter extends out of the hole. Compared with the prior art, the distal end of the first catheter can more easily enter the coronary sinus orifice. The distal end of the first catheter is provided with holes for injecting contrast agent, and the alcohol ablation catheter can be more easily delivered into the Marshall vein, making the second ring electrode closely adhere to the inner wall of the coronary sinus, with stable electrophysiological signal acquisition, convenient surgical operation, reducing the number of catheters used during the operation, and improving the surgical efficiency.

This utility model discloses a three-dimensional distal coronary vein mapping catheter, including a main mapping catheter and a secondary mapping catheter. The proximal end of the main mapping catheter is connected to an adjustable bending handle device, which includes a handle body, a turntable, and a pushing mechanism. The center extension line of the turntable is perpendicular to the axis of the main mapping catheter. The turntable is rotatably mounted on the handle body, and two bending wires are provided on the turntable and connected to the first mapping segment. The pushing mechanism is connected to the proximal end of the secondary mapping catheter. Compared with existing technologies, this method allows for the modeling of distal coronary veins, enabling more detailed detection of the patient's coronary vein information and facilitating rapid diagnosis. It achieves multiple functions with a single catheter, reducing the number of catheters required to enter the patient's body. Furthermore, the distal end of the main mapping catheter can be bent and deformed in two directions, facilitating access to the coronary sinus. This enhances surgical operability, reduces the burden on the patient, and saves surgical time.