A ventricular volume reduction puncture device

Abstract

The present invention discloses a ventricular volume reduction puncture device, which includes a puncture structure and a control structure; the puncture structure includes a puncture catheter and a mapping catheter. A first limiting member is provided at the proximal end of the puncture catheter, and a puncture needle is provided at the distal end of the puncture catheter. The mapping catheter is sleeved outside the puncture catheter; the control structure includes a fixed sleeve. The proximal end of the mapping catheter is fixed in the fixed sleeve, and a guide groove adapted to the first limiting member is provided on the fixed sleeve so that the first limiting member moves axially along the guide groove, thereby driving the puncture catheter to move axially.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a ventricular volume reduction puncture device. Background Art

[0002] Left ventricular aneurysm (LVA) is a common complication of myocardial infarction. After coronary artery myocardial infarction, it will cause ischemia and necrosis of some ventricular muscles. The necrotic ventricular muscles lose their contractile function. During heart contraction, this part of the necrotic myocardium will bulge outwards, forming a ventricular aneurysm, also called scar tissue. Due to the compensatory effect of the heart, the heart will continuously enlarge, and then heart failure, pulmonary congestion and other conditions will occur.

[0003] Left ventricular volume reduction is a ventricular enhancement method, which can be used to solve the problem of scar tissue in patients with ischemic cardiomyopathy after myocardial infarction. The patent with the application number 202210410403.8 provides a medical device for left ventricular volume reduction. Through the pulling effect of the inner anchor located in the right ventricle and the outer anchor outside the left ventricle, the scar tissue is brought close to the interventricular septum, avoiding the outward bulge of the scar tissue during heart contraction, so as to improve the contractile function of the heart.

[0004] Before performing left ventricular volume reduction, it is necessary to accurately measure the position of the scar tissue to determine the puncture position. In the prior art, the scar tissue is mainly located by magnetic resonance imaging (MRI). MRI technology uses imaging techniques such as X-rays and γ-rays. However, due to the strong radiation of MRI equipment and the high requirements for the use environment, metal and other devices will affect the accuracy of the detection results, so it cannot be used in the operating room. It can only preliminarily locate the scar tissue before surgery. At the same time, due to the high treatment cost, the economic burden on patients is greatly increased. Summary of the Invention

[0005] In view of the problems in the prior art such as the high treatment cost and the defects in the use scenarios of MRI equipment, the present invention provides a ventricular volume reduction puncture device, which can significantly improve the convenience of doctors for cardiac scar devices, puncture the ventricular scar tissue, avoid damage to healthy myocardial tissue, and improve the success rate and efficiency of the operation.

[0006] In order to achieve the above purposes, the present invention adopts the following technical solutions:

[0007] A ventricular volume reduction puncture device includes a puncture structure and a control structure;

[0008] The puncture structure includes a puncture catheter and a mapping catheter. A first limiting member is provided at the proximal end of the puncture catheter, a puncture needle is provided at the distal end of the puncture catheter, and the mapping catheter is sleeved outside the puncture catheter;

[0009] The control structure includes a fixed sleeve. The proximal end of the mapping catheter is fixed within the fixed sleeve. The fixed sleeve is provided with a guide groove adapted to the first limiting member, so that the first limiting member moves axially along the guide groove, thereby driving the puncture catheter to move axially.

[0010] Further, a rotating nut is sleeved outside the fixed sleeve. The first limiting member includes a fixed block connected to the proximal end of the puncture catheter, square sliders arranged on both sides of the fixed block, and circular sliders connected to the square sliders. The square sliders are slidably connected to the guide groove, and the circular sliders are connected to the spiral guide rail within the rotating nut, so that the rotating nut drives the circular sliders to move within the spiral guide rail, thereby driving the puncture catheter to move axially.

[0011] Further, the puncture structure further includes an inner tube. The inner tube is sleeved outside the puncture catheter, and the mapping catheter is sleeved outside the inner tube. The proximal end of the inner tube is provided with a second limiting member, and the second limiting member is arranged within the fixed sleeve. The distal end of the inner tube is a bent section, so that the distal end of the puncture catheter has a bending angle.

[0012] Further, the proximal end of the mapping catheter is provided with a third limiting member, and the third limiting member is arranged within the fixed sleeve. The distal end of the mapping catheter is provided with a sensing sheet body for detecting cardiac scars.

[0013] Further, a limiting groove adapted to the second limiting member is arranged within the fixed sleeve. The limiting groove divides the fixed sleeve into a first cavity and a second cavity, so that the first limiting member is placed within the first cavity, the third limiting member is placed within the second cavity, and the second limiting member is placed within the limiting groove.

[0014] Further, a spring is also arranged within the first cavity. The spring is sleeved outside the puncture catheter, and the outer periphery of the proximal end of the second limiting member cooperates with the distal end of the spring to provide an axial supporting force for the spring.

[0015] Further, the control structure further includes a clamping member. The clamping member has an I-shaped structure, and the proximal end of the rotating nut is clamped to the proximal end of the fixed sleeve through the clamping member.

[0016] Further, a locking boss is arranged at the distal end of the fixed sleeve. The locking boss is used to limit the circumferential movement of the control structure.

[0017] Further, a housing is further included. A groove adapted to the control structure is opened on the housing, so that a part of the rotating nut is exposed from the groove.

[0018] Further, the puncture structure further includes an outer tube. The outer tube is sleeved outside the mapping catheter, and the proximal end of the outer tube is fixedly connected to the housing.

[0019] Further, it further includes a first evacuation part which is provided with a through hole for the puncture structure to pass through; a sealing retaining ring is provided at the proximal end of the first evacuation part to form the seal of the first evacuation part.

[0020] Further, the puncture structure is provided with a liquid inlet hole, and the puncture catheter communicates with the first evacuation part through the liquid inlet hole.

[0021] Further, it further includes a second evacuation part which is arranged outside the housing, and the distal end of the second evacuation part is connected to the proximal end of the engaging part to evacuate the puncture catheter.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. Distinguish normal healthy myocardial tissue from cardiac scar tissue, avoid mis-puncturing healthy myocardial tissue during the operation, and thus avoid related complications such as ventricular septal perforation and cardiac tamponade;

[0024] 2. Measure the size of the cardiac scar area and avoid puncturing discontinuous cardiac scar tissue areas;

[0025] 3. The ventricular puncture technique based on the cardiac scar recognition technology will significantly improve the feasibility of the operation and improve the acceptance of the operation in areas lacking or not suitable for MRI-like imaging equipment or during the operation process.

[0026] 4. Integrate the puncture function and the scar recognition function to improve the convenience and fault tolerance of the operation.

[0027] 1. 5. The control structure is provided with a spring and a rotating nut, which can quickly retract after puncturing the position of the cardiac scar to ensure that the heart tissue will not be damaged during the working process of the heart. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a structural diagram of a ventricular volume reduction puncture device provided in Embodiment 1;

[0029] Figure 2 is a distal view of the puncture structure provided in Embodiment 1;

[0030] Figure 3 is a schematic proximal view of the puncture structure provided in Embodiment 1;

[0031] Figure 4 is a cross-sectional view of the control structure provided in Embodiment 1;

[0032] Figure 5 is a schematic view of the control structure provided in Embodiment 1;

[0033] Figure 6 is a schematic view of the fixed sleeve provided in Embodiment 1;

[0034] Figure 7 is a cross-sectional view of the fixed sleeve provided in the first embodiment;

[0035] Figure 8 is a schematic diagram of the rotating nut provided in the first embodiment;

[0036] Figure 9 is a cross-sectional view of the rotating nut provided in the first embodiment;

[0037] Figure 10 is a schematic diagram of the housing provided in the first embodiment;

[0038] Figure 11 is a schematic diagram of the structure of the second drain portion provided in the first embodiment;

[0039] Among them, 1. puncture structure; 11. outer tube; 12. mapping catheter; 121. sensing sheet body; 122. third limiting member; 13. inner tube; 131. second limiting member; 14. puncture catheter; 141. puncture needle; 142. first limiting member; 1421. fixing block; 1422. square slider; 1423. circular slider; 15. liquid inlet hole; 2. control structure; 21. fixed sleeve 21; 211. limiting groove; 212. first cavity; 213. second cavity; 214. guide groove; 215. spring; 216. locking boss; 22. rotating nut; 221. spiral guide rail; 23. engaging member; 3. housing; 4. cable; 5. processing structure; 6. first drain portion; 61. sealing ring; 7. second drain portion. Detailed implementation manners

[0040] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0041] The purpose of the present invention is to provide a ventricular volume reduction puncture device for the defects of the existing technology.

[0042] First embodiment

[0043] This embodiment provides a ventricular volume reduction puncture device, as Figures 1-10 shown, including a puncture structure 1, a control structure 2, and a housing 3. The control structure 2 is arranged in the housing 3, and the control structure 2 is connected to the puncture structure 1 so that the control structure 2 drives the puncture structure 1 to move.

[0044] The puncture structure 1 includes an outer tube 11, a mapping catheter 12, an inner tube 13, and a puncture catheter 14; the outer tube 11 is sleeved outside the mapping catheter 12, the mapping catheter 12 is sleeved outside the inner tube 13, the inner tube 13 is sleeved outside the puncture catheter 14, and the puncture catheter 14 is hollow inside to allow a guide wire to pass through.

[0045] The outer tube 11 is a hollow cylindrical tube. The proximal end of the outer tube 11 is connected to the distal end of the housing 2. The outer tube 11 is used to guide and protect the mapping tube 12, the inner tube 13, and the puncture catheter 14. The material of the outer tube 11 is composed of metals such as stainless steel and nitinol alloy or high-hardness materials such as polymers.

[0046] The mapping catheter 12 is a hollow cylindrical tube. The distal end of the mapping catheter 12 is a flexible distal end, and a sensing sheet body 121 is provided at the distal end. The distal end of the sensing sheet body 121 includes an electrode and a sensor. The types of the sensor include, but are not limited to, a contact force sensor, a pressure sensor, a mechanical deformation detection sensor, or an ultrasound-based contact sensor. The sensor will detect whether the electrode contacts the heart tissue. For example, when the sensor is a mechanical deformation detection sensor, blood flow will not cause the electrode to deform. However, when the distal end of the mapping catheter 12 contacts the heart tissue, such as the ventricular septum or the epicardium, the flexible distal end deforms, and thus transmits the signal to the processor. The processor combines this signal with the electrode impedance measurement value and compares it with a reference impedance standard (the reference impedance standard is based on the patient's historical data or clinical trial data). If the sensor signal determines deformation or the electrode impedance value is higher than the reference impedance standard, then it can be determined that the myocardial tissue at this location is healthy myocardial tissue. If the sensor signal determines deformation and the electrode impedance value is lower than the reference impedance standard, then it can be determined that the myocardial tissue at this location is cardiac scar tissue. In this embodiment, the cardiac scar area map is divided into an extracardiac area (epicardium) and an intracardiac area (ventricular septum).

[0047] A third limiting member 122 is provided at the proximal end of the mapping catheter 12. An opening adapted to the mapping catheter 12 is formed in the third limiting member 122 so that the proximal end of the mapping catheter 12 is fixed to the opening of the third limiting member 122, and the opening of the third limiting member 122 is also used for the inner tube to pass through; the third limiting member 122 is fixed in the control structure 2, and the third limiting member 122 has the function of sealing the inner tube.

[0048] A cable 4 is also connected to the proximal end of the mapping catheter 12. The cable 4 sequentially passes through the third limiting member 122, the control structure 2, the housing 3 and is connected to an external processing structure 5 to establish data transmission between the processing structure 5 and the sensing sheet body 121.

[0049] The inner tube 13 is a hollow cylindrical tube. The distal end of the inner tube 13 is a bent section, so that the distal end of the internal puncture catheter 14 also forms a certain bending angle. A second limiting member 131 is provided at the proximal end of the inner tube 13. The second limiting member 131 is a T-shaped structure formed by a circular ring and a convex platform. The distal end of the convex platform is fixedly connected to the circular ring. A stepped hole penetrating from the proximal end to the distal end is formed inside the second limiting member 131, that is, corresponding openings are formed in both the circular ring and the convex platform, so that the proximal end of the inner tube 13 is fixed on the opening of the circular ring, and the openings in the circular ring and the convex platform are also used for the puncture catheter 14 to pass through. The second limiting member 131 has the function of sealing the puncture catheter.

[0050] In this embodiment, the inner tube 13 is made of nitinol through heat treatment and pre-bending. In the initial state, the inner tube 13 is placed inside the mapping catheter 12, and the mapping catheter 12 is placed inside the outer tube 11. When the inner tube 13 is placed outside the outer tube 11, the inner tube 13 changes from a straight shape to a bent shape. This characteristic can adapt to the complex anatomical structure of the ventricle and complete the puncture of cardiac scars in different dimensions.

[0051] The puncture catheter 14 is a hollow cylindrical tube. A puncture needle 141 is provided at the distal end of the puncture catheter 14, which facilitates puncture. A first limiting member 142 is provided at the proximal end of the puncture catheter 14. The first limiting member 142 includes a fixing block 1421, a square slider 1422, and a circular slider 1423. The fixing block 1421 is a circular ring structure, and an opening is formed inside the fixing block 1421, so that the proximal end of the puncture catheter 14 is fixed inside the opening of the fixing block 1421, and the opening of the fixing block 1421 is also used for a guide wire to pass through. The square sliders 1422 are arranged on the left and right sides of the outer periphery of the fixing block, that is, there are two square sliders 1422 in total. The circular sliders 1423 are arranged at one end of the square sliders 1422, that is, there are two circular sliders 1423 in total. The square sliders 1423 and the circular sliders 1423 are both connected to the control structure 2, so that the control structure 2 drives the puncture catheter 14 to move axially.

[0052] In this embodiment, the puncture catheter 14 is made of nitinol through heat treatment and is placed inside the inner tube 13. When determining the cardiac puncture position, the control structure 2 is controlled to make the puncture catheter 14 move forward relative to the inner tube 13. The puncture needle 141 at the distal end of the puncture catheter 14 protrudes from the distal end of the inner tube 13 by a length of 5 - 15 mm. This length can ensure the puncture of the cardiac scar (located in the left ventricle or the interventricular septum) without excessive puncture. Its heat treatment makes the middle part of the puncture catheter 14 have a certain pre-bend to adapt to the inner tube 13.

[0053] In this embodiment, the outer tube 11, the mapping catheter 12, the inner tube 13, and the puncture catheter 14 in the puncture structure 1 are all provided with holes corresponding to each other near the proximal end of the outer tube 11. This hole is the liquid inlet hole 15. The liquid inlet hole 15 can ensure that when the evacuation structure evacuates, the liquid can enter the corresponding pipeline, making the infiltration more sufficient.

[0054] The control structure 2 includes a fixed sleeve 21, a rotating nut 22, and an engaging member 23.

[0055] The fixed sleeve 21 is a cylindrical structure with a hollow interior. An opening adapted to the mapping catheter 12 is provided at the distal end of the fixed sleeve 21. The proximal end of the mapping catheter 12 passes through this opening and is connected to the third limiting member 122. The third limiting member 122 is arranged inside the distal end of the fixed sleeve 21.

[0056] A limiting groove 211 adapted to the second limiting member 131 is provided inside the fixed sleeve 21, and the limiting groove 211 divides the fixed sleeve 21 into a first cavity 212 and a second cavity 213; the third limiting member 122 is arranged at the distal end of the second cavity 213, and the first limiting member 142 is arranged inside the first cavity 212.

[0057] The ring of the second limiting member 131 is arranged inside the limiting groove 211. An opening for the inner tube 13 to pass through is provided at the distal end of the limiting groove 211, so that the inner tube 12 passes through this opening and is connected to the ring. The convex platform of the second limiting member 131 is arranged at the proximal end of the limiting groove and is placed inside the first cavity 212.

[0058] An opening adapted to the cable 4 is also provided outside the second cavity 213, so that after the cable 4 passes out of the proximal end of the mapping catheter 12, it passes through this opening and is connected to the external processing structure.

[0059] A guiding groove 214 adapted to the first limiting member 142 is provided on the surface of the first cavity 212, so that the square slider 1422 of the first limiting member 142 moves axially along the guiding groove 214, thereby driving the puncture catheter 14 to move axially.

[0060] An opening adapted to the engaging member 23 is provided at the proximal end of the first cavity 212, so that the fixed sleeve 21 and the rotating nut 22 are fixed by the engaging member 23.

[0061] A spring 215 is also provided inside the first cavity 212. This spring 215 is a reset spring. The spring 215 is sleeved outside the puncture catheter 14 placed inside the first cavity 212, and the distal end of the spring 215 is also sleeved outside the convex platform of the second limiting member 131. The convex platform provides an axial supporting force for the spring 215, which is beneficial to the timely reset of the puncture catheter 14 and avoids accidental injury to the heart.

[0062] The distal end of the fixed sleeve 21 is provided with a locking boss 216, and the locking boss 216 is used to limit the circumferential movement of the control structure 2.

[0063] The rotating nut 22 is sleeved on the outer peripheral side of the first cavity 212 of the fixed sleeve 21. A spiral guide rail 221 is provided inside the rotating nut 22, and the spiral guide rail 221 cooperates with the circular slider 1423 of the first limiting member 142. When the rotating nut 22 is rotated, the circular slider 1423 connected thereto moves in the spiral guide rail 221, thereby driving the puncture catheter 14 to move axially.

[0064] A boss is provided on the outer peripheral side of the rotating nut 22 to increase the tactile sensation of the operator; a boss is provided at the proximal end of the rotating nut 22 to limit the axial movement of the control structure; an opening adapted to the engaging member 23 is also provided at the proximal end of the rotating nut 22, so that the engaging member 23 fixes the fixed sleeve 21 and the rotating nut 22.

[0065] The engaging member 23 has an I-shaped structure. The proximal end of the rotating nut 22 and the proximal end of the first cavity 212 of the fixed sleeve 21 are clamped by the engaging member 23. The engaging member 23 is also provided with a hole for the guide wire to pass through, so that the guide wire passes through the hole of the engaging member 23 after passing through the fixing block 1421 of the puncture catheter 14.

[0066] The inside of the housing 3 is hollow, including a housing body and a housing head. The proximal end of the housing head is connected to the distal end of the housing body. An opening for connecting to the outer tube 11 is provided at the distal end of the housing head, so that the outer tube 11 is connected to the opening.

[0067] A groove adapted to the control structure 2 is provided on the circumferential side of the housing body, so that a part of the rotating nut 22 is exposed from the groove, facilitating the user's contact and operation of the rotating nut 22.

[0068] The groove provided on the circumferential side of the housing body is also used to expose the locking boss 216 to limit the circumferential movement of the control structure 2.

[0069] The processing structure 5 includes a processor and a display. The processor integrates and processes the impedance value measured by the electrodes of the sensing sheet body 121 and the data detected by the sensor, judges the position and area size of the cardiac scar, and outputs the result to the display. The display displays the size and position of the cardiac scar in a graphical form (cardiac scar area map), making the result of the cardiac scar more intuitive.

[0070] In this embodiment, a first evacuation part 6 and a second evacuation part 7 are further included.

[0071] The first emptying part 6 is arranged inside the head of the housing, and a through hole for the mapping catheter 12 to pass through is provided in the first emptying part 6, so that the mapping catheter 12 passes through the through hole and is connected to the fixed sleeve 21; a matching sealing ring 61 is provided at the proximal end of the first emptying part 6 to form the seal of the first emptying part 6; the liquid inlet hole 15 is arranged in the first emptying part 6, and the liquid inlet hole 15 can cooperate with the emptying pipe of the first emptying part 6 to achieve the effects of emptying and liquid inlet.

[0072] The second emptying part 7 is arranged outside the housing, and an opening connected to the second emptying part 7 is provided at the proximal end of the housing body, so that the distal end of the second emptying part 7 passes through the opening and is connected to the proximal end of the engaging part 23, and an opening is also provided at the proximal end of the engaging part 23, so that the second emptying part 7 can empty the liquid in the puncture catheter 14.

[0073] As Figure 11 shown in the structural schematic diagram of the second emptying part, the second emptying part includes a sealing tee and a sealing nut. An opening is provided at the proximal end of the sealing tee for the guide wire to pass through, and the sealing nut is screwed onto the proximal opening of the sealing single-pass to seal the guide wire.

[0074] It should be noted that the structures of the first emptying part 6 and the second emptying part 7 in this embodiment are similar, and the sealing tee can adopt the emptying structure in the prior art, so no more details will be described here.

[0075] The using method of a ventricular volume reduction puncture device in this embodiment is as follows:

[0076] In the initial state, the puncture catheter is placed inside the inner tube, the inner tube is placed inside the mapping catheter, the mapping catheter is placed inside the outer tube, and at this time the control structure is located at a position close to the proximal end of the housing. At this time, there is a certain distance between the distal end of the control structure and the proximal end of the first emptying part.

[0077] When detection is required, the puncture structure is moved to the approximate position. Then, the rotary nut is manually pushed axially. At this time, the rotary nut drives the fixed sleeve, the puncture catheter, the inner tube, and the mapping catheter to move axially. The movement range is a certain distance in the initial state, and then the puncture catheter, the inner tube, and the mapping catheter are pushed out of the outer tube, so that the mapping catheter is placed in a suitable position. Then, based on the measurement data of the sensing sheet on the mapping catheter, it is judged whether the mapping catheter is in contact with the tissue. If not, the position of the mapping catheter is continuously adjusted. If in contact, the impedance value of the tissue is measured through the sensing sheet, and it is judged whether the measured impedance value is lower than the reference impedance value. If so, the tissue is marked as a cardiac scar. If not, the tissue is represented as healthy myocardial tissue. Then, the processor updates the cardiac scar area map (extra-cardiac area). At any time, it is judged whether the cardiac scar area map (extra-cardiac area) is complete. If not, the position of the mapping catheter is continuously adjusted, more measurement data is added, and the cardiac scar area map (extra-cardiac area) is updated. If so, the puncture area is selected according to the cardiac scar area map (extra-cardiac area). After the puncture area is determined, the rotary nut is manually rotated, so that the circular slider at the proximal end of the puncture catheter moves axially on the spiral guide rail of the rotary nut, and then the puncture needle on the puncture catheter punctures the epicardial area. The rotary nut is loosened, the puncture needle retracts into the inner tube, and the rotary nut is pushed forward, and the mapping catheter enters the left ventricular cavity. After the puncture needle enters the left ventricular cavity from the epicardial left ventricular wall, it enters the measurement mode of the cardiac scar area (intra-cardiac). The mapping catheter is moved to the left ventricular wall side of the interventricular septum, and the previous steps are repeated. The sensing sheet measures the cardiac scar area map (intra-cardiac area) of the interventricular septum. During the measurement process, it is judged at any time whether the cardiac scar area map (intra-cardiac area) is measured completely. If not, the position of the mapping catheter is continuously adjusted, and the remaining data is continuously measured. If so, the puncture area is determined according to the cardiac scar area map (intra-cardiac area), and the previous puncture steps are repeated to complete the puncture of the interventricular septum. A guide wire is inserted along the tail end of the second emptying part, the puncture structure is withdrawn, and the next operation of left ventricular volume reduction is carried out.

[0078] Embodiment 2

[0079] A pressure sensor is also arranged on the mapping catheter, so that the pressure mapping catheter can measure the blood pressure. For example, when the mapping catheter enters the left ventricle, the pressure value increases, indicating that the left ventricular puncture is completed; when the mapping catheter enters the right ventricle from the left ventricle, due to the pressure difference between the left and right ventricles, the measured pressure value deviates, indicating that the puncture of the interventricular septum is completed.

[0080] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A ventricular volume reduction puncture device, characterized in that, It includes a puncture structure and a control structure; The puncture structure includes a puncture catheter and a mapping catheter. A first limiting member is provided at the proximal end of the puncture catheter, a puncture needle is provided at the distal end of the puncture catheter, and the mapping catheter is sleeved outside the puncture catheter; The control structure includes a fixed sleeve. The proximal end of the mapping catheter is fixed within the fixed sleeve. A guide groove adapted to the first limiting member is provided on the fixed sleeve, so that the first limiting member moves axially along the guide groove, thereby driving the puncture catheter to move axially; A rotary nut is sleeved outside the fixed sleeve. The first limiting member includes a fixed block connected to the proximal end of the puncture catheter, square sliders provided on both sides of the fixed block, and circular sliders connected to the square sliders; The square sliders are slidably connected to the guide groove, and the circular sliders are connected to the spiral guide rail within the rotary nut, so that the rotary nut drives the circular sliders to move within the spiral guide rail, thereby driving the puncture catheter to move axially; The puncture structure further includes an inner tube. The inner tube is sleeved outside the puncture catheter, and the mapping catheter is sleeved outside the inner tube; A second limiting member is provided at the proximal end of the inner tube, and the second limiting member is arranged within the fixed sleeve; The distal end of the inner tube is a bent section, so that the distal end of the puncture catheter has a bending angle; A third limiting member is provided at the proximal end of the mapping catheter, and the third limiting member is arranged within the fixed sleeve; A sensing sheet body is provided at the distal end of the mapping catheter for detecting cardiac scars; A limiting groove adapted to the second limiting member is provided within the fixed sleeve. The limiting groove divides the fixed sleeve into a first cavity and a second cavity, so that the first limiting member is placed within the first cavity, the third limiting member is placed within the second cavity, and the second limiting member is placed within the limiting groove; The control structure further includes a clamping member. The clamping member has an I-shaped structure, and the proximal end of the rotary nut is clamped to the proximal end of the fixed sleeve through the clamping member.

2. The ventricular volume reduction puncture device according to claim 1, wherein, A spring is further provided within the first cavity. The spring is sleeved outside the puncture catheter. The outer periphery of the proximal end of the second limiting member cooperates with the distal end of the spring to provide an axial supporting force for the spring.

3. The ventricular volume reduction puncture device according to claim 2, characterized in that, A locking boss is provided at the distal end of the fixed sleeve. The locking boss is used to limit the circumferential movement of the control structure.

4. The ventricular volume reduction puncture device according to claim 3, wherein It further includes a housing. A groove adapted to the control structure is provided on the housing, so that a part of the rotary nut is exposed from the groove.

5. The ventricular volume reduction puncture device according to claim 4, characterized in that, The puncture structure further includes an outer tube. The outer tube is sleeved outside the mapping catheter, and the proximal end of the outer tube is fixedly connected to the housing.

6. The ventricular volume reduction puncture device according to claim 1, characterized in that, It further includes a first evacuation part. The first evacuation part is provided with a through hole so that the puncture structure can pass through; A mating sealing ring is provided at the proximal end of the first evacuation part to form a seal for the first evacuation part.

7. The ventricular volume reduction puncture device according to claim 6, characterized in that, The puncture structure is provided with a liquid inlet hole. The puncture catheter is communicated with the first evacuation part through the liquid inlet hole.

8. A ventricular volume reduction puncture device according to claim 4, characterized in that, It further includes a second evacuation part. The second evacuation part is arranged outside the housing. The distal end of the second evacuation part is connected to the proximal end of the clamping member to evacuate the puncture catheter.

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