20 results about "Coronary Vein" patented technology

The utility model discloses a post-operative nursing limb fixing device for coronary intervention through femoral artery, which relates to the technical field of medical instruments and comprises a lower mounting block and an upper mounting block, semi-cylindrical grooves are formed in the side walls of the lower mounting block and the upper mounting block, one side of the lower mounting block is connected with the upper mounting block through a hinge, a rotating unit is rotatably mounted in the grooves, and the rotating unit is connected with the lower mounting block through a hinge. The inflatable cushion is mounted on the rotating unit, the air release valve is mounted on the upper mounting block and the lower mounting block, and a control switch is mounted on the upper mounting block; the locking unit is mounted on one side, far away from the hinge, of the lower mounting block; the mounting rod is vertically mounted on the side, away from the groove, of the lower mounting block, a mounting hole is formed in the sickbed, and a limiting groove matched with the clamping block is formed in the bottom of the mounting hole. The problems that after existing coronary artery interventional therapy, the mode that ankles of corresponding lower limbs of a patient are fixed to a sickbed through a rope after an operation to keep the patient lying flat and the lower limbs straightened is tedious, and the lumbago of the patient is likely to be caused are solved.

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.

A system includes an intravascular reperfusion therapy device configured to be positioned within a coronary vein of a patient to deliver reperfusion therapy to a myocardium of a heart associated with the coronary vein. The intravascular reperfusion therapy device includes a sensor, a pump, and a catheter with a lumen. The intravascular reperfusion therapy device is configured to, using the pump, direct flow of a fluid through the lumen to deliver the reperfusion therapy. The system includes a processor circuit configured to receive, from the sensor, physiological data associated with blood flow through the coronary vein, determine, based on the physiological data, a progression of the reperfusion therapy; and control, based on the progression of the reperfusion therapy, the flow of the fluid through the lumen such that the reperfusion therapy is controlled.

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 system includes an intravascular reperfusion therapy device configured to be positioned within a coronary vein of a patient to deliver reperfusion therapy to a myocardium of a heart associated with the coronary vein. The intravascular reperfusion therapy device includes a sensor, a pump, and a catheter with a lumen. The intravascular reperfusion therapy device is configured to, using the pump, direct flow of a fluid through the lumen to deliver the reperfusion therapy. The system includes a processor circuit configured to receive, from the sensor, physiological data associated with blood flow through the coronary vein, determine, based on the physiological data, a progression of the reperfusion therapy; and control, based on the progression of the reperfusion therapy, the flow of the fluid through the lumen such that the reperfusion therapy is controlled.

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 utility model provides a guiding catheter which is used for coronary vein surgery and comprises a base and a catheter body which are connected, the catheter body comprises at least one hollow cavity, and the guiding catheter is characterized by comprising a main body part and a guiding part, the transition part is connected with the main body part, and the transition part comprises at least one arc-shaped structural body; and the end part is connected with the transition part. By adopting the special arc-shaped structure, the guide catheter is more convenient to rotate in the coronary sinus, the problem that the head end of the catheter can be quickly aligned with a vein opening is solved, and the operation time is shortened.

The embodiment of the invention provides an operation assisting system for a cardiac pacemaker, and the system comprises an obtaining module which is configured to obtain a CT image data set of the heart of a patient; the creation module is connected with the acquisition module, receives the image data set sent by the acquisition module, and is configured to establish a cardiac structure three-dimensional anatomical model comprising a coronary vein branch and a right ventricle according to the image data set; the 3D printing module is connected with the creating module, receives the three-dimensional anatomical model of the heart structure sent by the creating module, and is configured to obtain a 3D printing model of the heart of the patient according to the three-dimensional anatomical model of the heart structure; the calculation module is connected with the 3D printing module, the calculation module is configured to obtain the adaptive direct distance between the ventricular electrodes based on the heart 3D printing model, the operation auxiliary system can obtain the adaptive direct distance between the ventricular electrodes, and then a doctor can be accurately guided to implant the electrodes into the target position in the heart.

The present invention relates to a method for calculating microvascular resistance at the end of coronary arteries and a method and system for calculating FFR. The method for calculating microvascular resistance at the end of coronary arteries includes the following steps: firstly, a coronary tree model is established based on medical images to determine the volume of the myocardium, multiple collateral vessels are added to the coronary tree model, the size of the blood supply myocardium of each coronary outlet is determined according to the radius of each coronary outlet, and then a microcirculation vessel model is established by continuously performing cross operations, and the microcirculation resistance value of each coronary outlet is calculated based on the microcirculation vessel model and blood routine data using Poiseuille's theorem and Farin effect. Compared with the prior art, the present invention adds collateral vessels to the coronary tree model, and the obtained coronary tree model is more in line with the actual physiological situation. Then, by establishing the microcirculation vessel model, the microcirculation resistance value of the coronary outlet is accurately obtained, and the boundary conditions in the FFR calculation are set according to the microcirculation resistance value, thereby improving the accuracy of the FFR calculation.

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 invention discloses a construction method of a CABG postoperative bridge vessel reocclusion condition prediction model, which effectively achieves the purpose of assisting medical personnel in performing risk stratification and prognosis prediction on a CABG postoperative patient, and comprises the following steps: S1, obtaining a coronary image to be marked; s2, segmenting the coronary artery image by using a VB-net network; s3, using a point cloud segmentation and segmentation technology of a graph convolutional neural network to obtain a coronary artery segmentation model; s4, screening related variables of bridge vessel reocclusion after CABG operation by using regression analysis; step S5, constructing a CABG postoperative bridge vessel reocclusion prediction model; and step S6, constructing a column diagram to display the performance of each prediction model in the step S5, the structure is novel, the concept is ingenious, the operation is simple and convenient, high-risk patients can be found as early as possible, intervention measures can be taken in time, and the accuracy and individualization level of diagnosis and treatment effects on the patients are improved.

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.

The embodiment of the invention provides an interventional surgery robot system for implanting a cardiac pacemaker, and the system comprises a receiving module which is used for receiving a three-dimensional anatomical model of a heart structure; the recognition module is used for recognizing the three-dimensional anatomical model to obtain anatomical structure information of the heart, and the anatomical structure information comprises information of the left atrium, the right atrium, the left ventricle, the right ventricle, the coronary artery and the coronary vein; the determining module is used for determining and obtaining the adaptive direct distance between the ventricular electrodes according to a preset algorithm on the basis of the anatomical structure information, the interventional operation robot system can obtain the adaptive direct distance between the ventricular electrodes, and then a doctor can be accurately guided to implant the electrodes into the target position in the heart.

The invention belongs to the field of medical instruments, and particularly relates to an electrode guide wire capable of being used for mapping and treatment, which comprises a tube body, a patient end electrode, a wire, a first winding wire and a second winding wire, the patient end electrode is arranged on the side wall of the far end of the tube body; the wire is arranged in the tube body, one end of the wire is connected with the patient end electrode, and the other end of the wire extends out of the near end of the tube body. The first winding wire and the second winding wire are both spiral and are arranged in the tube body, the first winding wire is arranged on the side, facing the near end, of the patient end electrode, one end of the second winding wire is connected with the first winding wire, and the other end of the second winding wire is arranged at the tip of the far end of the tube body; the first winding wire is plastic; the second winding wire and the first winding wire are made of the same material or different materials. The electrode guide wire capable of being used for mapping and treatment can be used for collecting coronary sinus and coronary vein far-end electric signals, is high in adaptability and can be used in cooperation with a mapping electrode catheter, and the collection position can be increased.

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.

The invention provides a myocardial deep origin ventricular stage preconstriction epicardium excitation ablation device and method.The device comprises an adjustable bending sheath tube assembly, a mapping ablation assembly and an ablation needle assembly, the near end of the adjustable bending sheath tube assembly is used for being operated by a user, and the far end of the adjustable bending sheath tube assembly is used for stretching into coronary veins; the mapping and ablation assembly is arranged on the adjustable bending sheath tube assembly in a penetrating mode, the mapping and ablation assembly can move in the axial direction of the adjustable bending sheath tube assembly and penetrate out of the far end of the adjustable bending sheath tube assembly, and the mapping and ablation assembly is used for conducting mapping and thermal ablation on coronary veins; the ablation needle assembly is installed at the far end of the mapping ablation assembly in a telescopic mode and used for conducting chemical ablation on coronary veins. According to the device, an adjustable bending sheath tube assembly, a mapping ablation assembly and an ablation needle assembly for pushing and injecting anhydrous alcohol are combined, so that after thermal ablation is invalid, the anhydrous alcohol is injected through an ablation needle for chemical ablation. Operation is simple, operation time and risks are reduced, and operation efficiency is improved.

The invention discloses a three-dimensional far-end coronary vein mapping catheter which comprises a main mapping catheter and an auxiliary mapping catheter. The mapping main catheter sequentially comprises a main catheter body, an adjustable bent handle device, a first connector and a Luer taper from the far end to the near end. The far end of the main catheter body is bent in a normal state; the outer diameter of the auxiliary catheter body is smaller than or equal to the diameter of the catheter through cavity, a mapping section is arranged at the far end of the auxiliary catheter body, a second end electrode is arranged at the tip of the far end of the mapping section, a second magnetic positioning sensor is arranged in the mapping section, and the second end electrode and the second magnetic positioning sensor are electrically connected with the second connector through the branching connector and the wires respectively. Compared with the prior art, far-end coronary veins can be modeled, coronary vein information of a patient can be detected more meticulously, rapid diagnosis is facilitated, multiple functions are achieved through one catheter, the number of catheters entering the body of the patient is reduced, operation operability is enhanced, meanwhile, the burden of the patient is reduced, and operation time is saved.