Atrial septum puncture needle, puncture mechanism and puncture instrument

Abstract

The invention discloses an atrial septum puncture needle, a puncture mechanism and a puncture instrument, and relates to the field of medical instruments.The puncture needle body comprises a puncture section and a pushing section, and the near end of the puncture section is movably connected with the far end of the pushing section; the far end of the puncture section is provided with a triangular prism surface, the puncture section can axially rotate along the pushing section, the peripheral surface of the near end of the puncture section is provided with a clamping groove, the clamping groove is of a groove structure which is formed in the mode that the outer wall of the puncture section is sunken in the radial direction, the far end of the pushing section is provided with a clamping ring, the clamping ring is of a protruding structure which is formed in the mode that the outer wall of the pushing section protrudes in the radial direction, and the outer wall of the clamping ring abuts against the outer wall of the clamping groove. When a puncture operation is carried out, the puncture section is rotated, the atrial septum is punctured on the three-prism surface and cut in the radial direction at the same time, so that the puncture section can puncture the atrial septum more easily, the puncture force of a doctor operating the puncture needle body is small, and the phenomenon that after the atrial septum is punctured, the puncture needle cannot be damaged is avoided. And the puncture needle body punctures the atrial wall to cause operative complications, so that the safety of an operation is improved.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to an atrial septal puncture needle, a puncture mechanism and a puncture instrument. Background Art

[0002] Atrial septal puncture is an important cardiac interventional surgery technique. It establishes a channel from the left atrium to the right atrium by puncturing the atrial septum, which facilitates subsequent surgical treatment. Atrial septal puncture is widely used in atrial fibrillation catheter ablation, left atrial appendage closure and other surgeries. It has the advantages of less trauma and faster recovery.

[0003] At present, the puncture operation needs to be performed under the guidance of a CT machine or ultrasound device. The position of the sheath is obtained through the image of the device. When the end of the sheath is aligned with the oval fossa, the puncture needle in the sheath is punctured through the atrial septum. The imaging effect of using a CT machine is better, but the cost of using a CT machine is high, and the radiation generated by the CT machine can cause harm to doctors and patients; the imaging effect of using an ultrasound device is poor, and the imaging effect depends on the ultrasound section, which has higher requirements for ultrasound doctors, but the cost of using an ultrasound device is low, and the ultrasound device will not cause harm to doctors and patients.

[0004] Since the tip of the puncture needle is relatively sharp, when performing puncture surgery with the puncture needle, there is a risk of piercing the atrial septum and then piercing the atrial wall if the puncture force is large, and the ideal puncture effect cannot be achieved if the puncture force is small. Therefore, the doctor needs to have rich clinical operation experience and properly control the puncture force. The operation is difficult and has a high risk. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an atrial septal puncture needle, wherein the puncture needle body comprises a puncture section and a push section, wherein the proximal end of the puncture section is movably connected to the distal end of the push section;

[0006] The distal end of the puncture section is provided with a triangular facet, and the puncture section can rotate along the axial direction of the pushing section.

[0007] Preferably, a groove is provided on the outer peripheral surface of the proximal end of the puncture section, and the groove is a groove structure that is recessed in the radial direction on the outer wall of the puncture section.

[0008] Preferably: a snap ring is provided at the distal end of the pushing section, and the snap ring is a protruding structure protruding radially from the outer wall of the pushing section;

[0009] The clamping ring is embedded in the clamping groove, the outer wall of the clamping ring abuts against the outer wall of the clamping groove, and the clamping ring can rotate along the axial direction of the clamping groove.

[0010] Preferably, the outer diameter of the puncture section is greater than or equal to the outer diameter of the pushing section.

[0011] A puncture mechanism comprises the above-mentioned puncture needle body and an inner tube, wherein the puncture needle body is guided by the inner tube, and when the puncture needle body enters the inner tube, it moves along the axial direction of the inner tube.

[0012] Preferably, the outer wall of the puncture section is further provided with a boss, and the boss is located at the proximal end of the puncture section.

[0013] Preferably: the inner wall of the inner tube is further provided with a groove, and the groove extends to the proximal opening of the inner tube;

[0014] The puncture needle body enters the inner tube, the boss slides along the groove, and the groove guides the boss.

[0015] Preferably: a thread groove is provided on the inner wall of the distal end of the inner tube, and the groove is connected to the proximal end of the thread groove;

[0016] When the boss enters the thread groove, the thread groove guides the boss, and the boss performs rotational motion along the thread groove.

[0017] An atrial septal puncture device, which uses the above-mentioned puncture mechanism to perform atrial septal puncture, and also includes a puncture sheath, into which the puncture mechanism is inserted, the puncture sheath includes a first tube body and a second tube body, the first tube body and the second tube body are connected through an expansion end, and the first tube body is fixedly connected to the inner tube;

[0018] The expansion end includes a metal mesh and a polymer film, the polymer film covers the outer surface of the metal mesh, the distal end of the metal mesh is fixed to the outer peripheral side of the first tube body, and the proximal end of the metal mesh is fixed to the outer peripheral side of the second tube body.

[0019] Preferably, it also includes a driving mechanism, which is connected to the puncture mechanism and is used to adjust the density and diameter of the metal mesh.

[0020] Technical effects and advantages of the present invention:

[0021] 1. In the present invention, when performing a puncture operation, the puncture segment is rotated to puncture the atrial septum on the triangular surface while cutting the atrial septum radially, so that the puncture segment is easier to penetrate the atrial septum. The puncture force of the doctor operating the puncture needle body is relatively small, which avoids surgical complications caused by the puncture needle body piercing the atrial wall after the atrial septum is penetrated, thereby improving the safety of the operation.

[0022] 2. In the present invention, the boss is limited by the thread groove of the inner tube, and the thread groove provides external force to the boss to realize the rotation of the puncture section. The structural design of the puncture needle body and the inner tube is simple, the stability is high, the processing is easy, and the manufacturing cost is low.

[0023] 3. In the present invention, the density and diameter of the metal mesh are adjusted by a driving mechanism, and the expansion end is used to adaptively expand the puncture point, thereby reducing the risk of tearing during expansion of the foramen ovale and providing a suitable passage for subsequent interventional instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the structure of the atrial septal puncture needle provided in an embodiment of the present application;

[0025] Figure 2 is a cross-sectional view of an atrial septal puncture needle provided in an embodiment of the present application;

[0026] Figure 3 It is a schematic diagram of the structure of the atrial septal puncture needle and the puncture mechanism provided in the embodiment of the present application;

[0027] Figure 4 is a cross-sectional view of a puncture mechanism provided in an embodiment of the present application;

[0028] Figure 5 is a schematic diagram of the structure of the atrial septum puncture device provided in an embodiment of the present application;

[0029] Figure 6 It is a schematic diagram of the structure of the puncture sheath in the atrial septum puncture device provided in an embodiment of the present application;

[0030] Figure 7 It is a schematic diagram of the structure of the atrial septum puncture device provided in an embodiment of the present application when the expansion end is in a filled state;

[0031] Figure 8 It is a schematic diagram of the structure of the expansion end of the atrial septum puncture device provided in an embodiment of the present application;

[0032] Fig. 9 is a cross-sectional view of the expansion end of the atrial septum puncture device provided in an embodiment of the present application;

[0033] Fig.10 is a schematic structural diagram of a driving mechanism in an atrial septum puncture device provided in an embodiment of the present application;

[0034] Figure 11-15 It is a schematic diagram of the process of atrial septal puncture using the atrial septal puncture instrument provided in an embodiment of the present application.

[0035] In the figure: 1. puncture needle body; 11. puncture section; 111. triangular face; 112. slot; 113. boss; 12. push section; 121. snap ring; 2. inner tube; 21. groove; 22. threaded groove; 3. puncture sheath; 31. first tube body; 311. limit platform; 32. second tube body; 4. expansion end; 41. metal mesh; 42. polymer film; 5. outer sheath; 6. driving mechanism; 61. handle; 611. cavity; 612. through hole; 613. flushing port; 614. mounting groove; 615. roller mounting hole; 62. sealing rubber ring; 63. extrusion piece; 64. limit block; 65. plug; 66. puncture needle limit block; 67. indicator handle; 68. sliding block; 69. roller. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The examples of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific uses.

[0037] See also Figure 1 As shown, in this embodiment, an atrial septal puncture needle is provided. The puncture needle body 1 includes a puncture section 11 and a push section 12. The proximal end of the puncture section 11 is movably connected to the distal end of the push section 12. The distal end of the puncture section 11 is provided with a triangular surface 111, and the puncture section 11 can rotate axially along the push section 12.

[0038] In this embodiment, when performing a puncture operation, the puncture segment 11 is rotated to puncture the atrial septum while the triangular surface 111 radially cuts the atrial septum, making it easier for the puncture segment 11 to penetrate the atrial septum. The doctor's puncture force when operating the puncture needle body 1 is relatively small, thereby avoiding surgical complications caused by the puncture needle body 1 piercing the atrial wall after the atrial septum is penetrated, thereby improving the safety of the operation.

[0039] In one embodiment, a groove 112 is provided on the proximal outer peripheral surface of the puncture segment 11. The groove 112 is a groove structure that is radially recessed on the outer wall of the puncture segment 11. The groove 112 is annular as a whole, and the cross-section of the groove 112 along the radial direction of the puncture segment 11 is arc-shaped. The outer wall of the puncture segment 11 is also provided with a boss 113, and the boss 113 is located at the proximal end of the puncture segment 11.

[0040] Furthermore, a snap ring 121 is provided at the distal end of the pushing section 12. The snap ring 121 is a raised structure that protrudes radially from the outer wall of the pushing section 12. The snap ring 121 is annular as a whole, and the radial cross-section of the snap ring 121 along the pushing section 12 is spherical. The snap ring 121 is embedded in the groove 112, and the outer wall of the snap ring 121 abuts against the outer wall of the groove 112. The snap ring 121 can rotate axially along the groove 112, so that the puncture section 11 can rotate axially along the pushing section 12.

[0041] It can be understood that the outer diameter of the puncture section 11 is greater than or equal to the outer diameter of the pushing section 12. Preferably, the outer diameter of the connection between the clamping ring 121 and the clamping groove 112 is the same as the outer diameter of the pushing section 12, so that the overall outer diameter of the puncture needle body 1 remains consistent, which is conducive to puncturing the atrial septum.

[0042] See also Figure 3-4 As shown, in this embodiment, a puncture mechanism is also provided, including the above-mentioned puncture needle body 1 and an inner tube 2. The puncture needle body 1 is guided by the inner tube 2. When the puncture needle body 1 enters the inner tube 2, it moves along the axial direction of the inner tube 2. When the puncture section 11 of the puncture needle body 1 moves to the distal end of the inner tube 2, under the action of the inner tube 2, the puncture section 11 can rotate axially along the pushing section 12.

[0043] In a specific embodiment, the inner wall of the inner tube 2 is further provided with a groove 21 , which extends to the proximal opening of the inner tube 2 , and the distal inner wall of the inner tube 2 is provided with a thread groove 22 , which is connected to the proximal end of the thread groove 22 .

[0044] In this embodiment, the puncture needle body 1 enters the inner tube 2, and the boss 113 slides along the groove 21. When the boss 113 enters the thread groove 22, the thread groove 22 guides the boss 113, and the boss 113 rotates along the thread groove 22, so that the puncture section 11 rotates axially along the pushing section 12, and the puncture needle body 1 slides and is pushed in the inner tube 2.

[0045] It can be understood that the boss 113 is limited by the thread groove 22 of the inner tube 2, and the thread groove 22 provides external force to the boss 113 to realize the rotation of the puncture section 11. The structural design of the puncture needle body 1 and the inner tube 2 is simple, the stability is high, the processing is easy, and the manufacturing cost is low.

[0046] See also Figure 5-6 As shown, in this embodiment, an atrial septal puncture device is provided, including the above-mentioned puncture mechanism and a puncture sheath 3. The puncture mechanism is inserted into the puncture sheath 3 and the puncture mechanism is transported through the puncture sheath 3.

[0047] In a specific embodiment, the puncture sheath 3 includes a first tube body 31 and a second tube body 32, and the first tube body 31 and the second tube body 32 are connected by an expansion end 4. The first tube body 31, the second tube body 32 and the expansion end 4 are internally connected to form a channel for the puncture mechanism to move. When in use, the puncture mechanism is inserted from the second tube body 32 and enters the first tube body 31 through the expansion end 4.

[0048] Furthermore, the first tube body 31 is fixedly connected to the inner tube 2, and a limiting platform 311 is provided on the inner wall of the tube hole of the first tube body 31. The outer wall of the distal end of the inner tube 2 abuts against the limiting platform 311, and the inner tube 2 is limited by the limiting platform 311. The inner diameter of the tube hole of the first tube body 31 at the limiting platform 311 is larger than the outer diameter of the puncture needle body 1, so that the puncture needle body 1 can pass through the opening at the front end of the first tube body 31.

[0049] In one embodiment, the length of the first tube 31 is between 0-15 mm, preferably 4 mm.

[0050] In one embodiment, see Figure 6-8 As shown, the expansion end 4 includes a metal mesh 41 and a polymer film 42. The polymer film 42 covers the outer surface of the metal mesh 41. The metal mesh 41 has a hollow columnar structure. The distal end of the metal mesh 41 is fixed to the outer peripheral side of the first tube body 31, and the proximal end of the metal mesh 41 is fixed to the outer peripheral side of the second tube body 32.

[0051] Preferably, the metal mesh 41 is a dense mesh structure made of cross-woven nickel-titanium alloy wires. In the initial state, the metal mesh 41 is a hollow column. In the filled state, the developing microbubble liquid enters the gap between the metal mesh 41 and the inner tube 2, causing the metal mesh 41 to expand radially into an ellipsoidal shape.

[0052] In one embodiment, the density of the metal mesh 41 is between 10-100 PPI, preferably 40 PPI.

[0053] In one embodiment, the length of the metal mesh 41 when expanded and opened is between 3 and 15 mm, preferably 5 mm.

[0054] In one embodiment, the diameter of the metal mesh 41 in the filled state is between 3-10 mm, preferably 5 mm. In one embodiment, the thickness of the metal mesh 41 is between 0.1-1 mm, preferably 0.2 mm.

[0055] In one embodiment, the wire diameter of the nickel-titanium alloy wire used in the metal mesh 41 is between 0.5 and 2.0 mm, preferably 0.1 mm.

[0056] In another specific embodiment, the metal mesh 41 is made of a nickel-titanium alloy tube cut into mesh rings, and the metal mesh 41 is a metal dense mesh skeleton.

[0057] In another specific embodiment, the metal mesh 41 may be spherical, spindle-shaped or funnel-shaped after expansion, and the outer polymer film 42 is supported by the metal mesh 41 .

[0058] In another specific embodiment, the polymer film 42 can be made of polyvinyl alcohol, polyurethane, polytetrafluoroethylene or silicone rubber.

[0059] In this embodiment, the metal mesh 41 enters the human body. Due to the presence of the developing microbubble liquid between the dense mesh structure of the metal mesh 41 and the inner tube 2 and the polymer film 42, the developing effect is better in the filled state. During the operation, it can be accurately detected by the ultrasonic equipment throughout the whole process, which is beneficial to the positioning of the instruments during the operation, quickly reaching the surgical site for puncture, and shortening the operation time.

[0060] After the puncture needle is inserted, if other operations are required, such as left atrial appendage occlusion or mitral valve-related operations, the front end can be used to fill and expand the existing puncture site. When the front end is expanded, the skeleton of the metal mesh 41 recovers due to the superelasticity of nickel-titanium. When filled with developing microbubble liquid, it can support the outer polymer membrane 42 to form an uneven surface structure, increase friction, and ensure that the metal mesh 41 will not shift while expanding.

[0061] Specifically, when the second tube body 32 moves away from the first tube body 31 or the first tube body 31 moves away from the second tube body 32, the second tube body 32 and the first tube body 31 pull the metal mesh 41, so that the metal mesh 41 switches from an expanded open state to a contracted closed state. At this time, the diameter of the metal mesh 41 is not larger than the diameter of the puncture sheath 3, and the puncture sheath 3 can smoothly pass through the outer sheath 5 and the atrial septum puncture.

[0062] When the second tube body 32 moves toward the first tube body 31 or the first tube body 31 moves toward the second tube body 32, the metal mesh 41 expands to a filled state. At this time, the diameter of the metal mesh 41 is greater than the diameter of the outer sheath 5. During the switching process of the metal mesh 41, the length, diameter and density of the metal mesh 41 change synchronously. When the puncture needle body 1 performs puncture, the metal mesh 41 in the filled state can prevent the puncture sheath 3 from being brought into the left atrium by the puncture needle body 1 and piercing the atrial wall, thereby reducing the risk of complications of the atrial septal puncture operation.

[0063] When the second tube body 32 moves toward the first tube body 31 or the first tube body 31 moves toward the second tube body 32, the metal mesh 41 elastically resets and switches from a contracted closed state to an expanded open state, at which time the diameter of the metal mesh 41 is greater than the diameter of the outer sheath 5. During the state switching process of the metal mesh 41, the length, diameter and density of the metal mesh 41 are changed synchronously.

[0064] See also Figure 9-10As shown, it also includes an outer sheath 5, the proximal end of the outer sheath 5 is connected to a hemostatic valve, and the channel inside the outer sheath 5 facilitates the puncture sheath 3 to enter the left ventricle. The hemostatic valve is used to clamp the blood vessel and block the blood flow to achieve hemostasis during the operation. This is a prior art and will not be elaborated here.

[0065] It also includes a driving mechanism 6, which is connected to the puncture mechanism. The driving mechanism 6 is used to adjust the density and diameter of the metal mesh 41. The driving mechanism 6 includes a handle 61. A cavity 611 is axially provided in the handle 61, and an opening is provided at the proximal end of the cavity 611. A through hole 612 is also provided along the axis of the handle 61. The through hole 612 is connected to the cavity 611. The through hole 612 and the cavity 611 are used to insert the inner tube 2. A mounting groove 614 is provided at the distal end of the handle 61. The mounting groove 614 is used to insert the proximal end of the second tube body 32. The second tube body 32 and the mounting groove 614 are sealed with a sealing ring.

[0066] Furthermore, a flushing port 613 is provided at the distal end of the handle 61, and the flushing port 613 is connected to the through hole 612. The flushing port 613 is used to connect a liquid supply tube, a liquid supply pump and a liquid supply container. The liquid supply container is used to place developing microbubble liquid. The liquid supply pump is started, and the developing microbubble liquid is injected into the through hole 612 through the liquid supply tube. The developing microbubble liquid enters the gap between the puncture sheath 3 and the inner tube 2 through the through hole 612, and then flows to the expansion end 4. The injected developing microbubble liquid causes the expansion end 4 to expand. When performing a puncture operation, the developing microbubble liquid can increase the developing effect of the ultrasonic equipment.

[0067] Furthermore, the handle 61 is also provided with a roller mounting hole 615 , and a roller 69 is mounted at the roller mounting hole 615 . The roller 69 is mounted on the handle 61 through a bracket.

[0068] In this embodiment, a sealing rubber ring 62 is provided at the distal end of the cavity 611. The sealing rubber ring 62 is located at the connection between the cavity 611 and the through hole 612, and the sealing rubber ring 62 is sleeved on the outer side of the inner tube 2 to isolate the cavity 611 and the through hole 612, so that the developing microbubble liquid injected from the flushing port 613 cannot enter the cavity 611. An extrusion piece 63 is provided on one side of the sealing rubber ring 62. The extrusion piece 63 is sleeved on the outer side of the inner tube 2, and the outer peripheral wall of the extrusion piece 63 abuts against the inner wall of the cavity 611. The extrusion piece 63 is fixed by the friction force between the extrusion piece 63 and the inner wall of the cavity 611, thereby fixing the position of the sealing rubber ring 62 to prevent the developing microbubble liquid from entering the cavity 611, and the sealing rubber ring 62 presses the inner tube 2 to prevent its rotation from causing the metal mesh 41 at the distal end to collapse.

[0069] Furthermore, a limit block 64 is provided at the proximal end of the cavity 611, and the limit block 64 is mounted on the outside of the inner tube 2. The outer peripheral wall of the limit block 64 abuts against the inner wall of the cavity 611. A sliding block 68 is provided between the limit block 64 and the extrusion member 63. The sliding block 68 is fixed to the outer peripheral surface of the inner tube 2. The sliding block 68 can move axially along the cavity 611, and the outer peripheral surfaces of the sliding block 68 and the roller 69 are both provided with toothed structures.

[0070] In the filled state, the handle 61 is held and the roller 69 is pushed counterclockwise to rotate, driving the sliding block 68 to move axially toward the proximal end along the cavity 611, thereby driving the inner tube 2 to move axially along the cavity 611, and the inner tube 2 pulls the first tube body 31 to move toward the proximal end. Since the position of the second tube body 32 remains unchanged, the distance between the first tube body 31 and the second tube body 32 is reduced, so that the metal mesh 41 is compressed, the density of the metal mesh 41 becomes smaller, and the diameter is relatively increased, and the maximum outer diameter of the expanded metal mesh 41 and the polymer film 42 increases;

[0071] Push the roller 69 to rotate clockwise, driving the sliding block 68 to move axially distally along the cavity 611, driving the inner tube 2 to move axially along the cavity 611, and the inner tube 2 pushes the first tube body 31 to move distally. Since the position of the second tube body 32 remains unchanged, the distance between the first tube body 31 and the second tube body 32 increases, so that the metal mesh 41 is stretched, the density of the metal mesh 41 increases, and the diameter becomes relatively smaller, and the maximum outer diameter of the expansion of the metal mesh 41 and the polymer film 42 becomes smaller. The above-mentioned setting is convenient for adjusting the density and diameter of the metal mesh 41, and the expansion end 4 is used to adaptively expand the puncture point to reduce the risk of tearing during the expansion of the foramen ovale, and at the same time provide a suitable passage for subsequent interventional instruments.

[0072] It is further understandable that the density of the metal mesh 41 can be finely adjusted by adjusting the density of the toothed structures on the outer circumference of the sliding block 68 and the roller 69 .

[0073] In this embodiment, a plug 65 is installed at the proximal opening of the handle 61, the proximal end of the inner tube 2 is fixed on the plug 65, the proximal end of the puncture needle body 1 passes through the plug 65 and extends to the outside of the handle 61, and the proximal end of the puncture needle body 1 is fixedly connected to the puncture needle limit block 66. The outer diameter of the puncture needle limit block 66 is larger than the inner diameter of the inner tube 2. The puncture needle body 1 is limited by the puncture needle limit block 66 to prevent the puncture needle body 1 from puncturing too long.

[0074] Furthermore, the puncture needle limit block 66 is also fixedly connected to an indicator handle 67, through which the front end direction of the puncture needle body 1 is confirmed and the puncture position is determined. The puncture needle body 1 can also be driven to move by moving the indicator handle 67 axially to adjust the direction of the front end of the puncture needle body 1 and the puncture position.

[0075] See also Figure 11-15As shown, the procedure for a transseptal puncture is as follows:

[0076] S1, the puncture sheath 3 goes along the inner side of the outer sheath 5, rises from the inferior vena cava to the right atrium, and reaches the oval fossa. Due to the presence of the expansion end 4 and the microbubble liquid, the front end of the puncture sheath 3 can be detected by the ultrasound device during the movement;

[0077] S2, the puncture sheath 3 extends out of the end of the outer sheath 5, and the expansion end 4 expands and opens; under the guidance of ultrasound, the front end of the atrial septum puncture structure is positioned at the puncture point;

[0078] S3, the puncture needle body 1 moves forward and rotates to break the puncture point;

[0079] S4, the expansion end 4 is against the outside of the oval fossa, preventing the puncture needle body 1 from moving too far forward due to surgical misoperation, so that the atrial wall is not easily punctured;

[0080] S5. Use the expansion end 4 to adaptively expand the puncture point; reduce the risk of tearing during expansion of the foramen ovale, and provide a suitable passage for subsequent interventional devices.

[0081] The working principle of the present invention is as follows: when performing surgery, the expansion end 4 is in a contracted closed state and is located in the outer sheath 5. The expansion end 4 is extended out of the outer sheath 5. The use of the expansion end 4 and the developing microbubble liquid can make the ultrasonic device have a better developing effect. When it is necessary to puncture the atrial septum, the expansion end 4 is switched to the expanded open state. After the front end of the first tube 31 abuts against the oval fossa, the puncture needle body 1 slides and rotates in the inner tube 2 to puncture. During the puncture, the expansion end 4 plays a limiting role and limits the moving distance of the puncture needle body 1, so that the puncture needle body 1 will not puncture the atrial wall, thereby reducing the risk of surgical complications. After the puncture is completed, the outer diameter and density of the expansion end 4 are adjusted at the puncture hole to change the hardness of the expansion end 4, and the diameter of the puncture hole is adaptively expanded to reduce the risk of tearing when the oval foramen is expanded, and at the same time, a suitable passage will be provided for subsequent interventional instruments. The expansion end 4 is switched to the contracted closed state again and retracted into the outer sheath 5, the guide wire is sent into the left atrium through the inner tube 2, and then the puncture sheath 3 and the outer sheath 5 are withdrawn in turn and the guide wire is retained to complete the atrial septal puncture operation.

[0082] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A transseptal puncture needle, comprising a puncture needle body (1), characterized in that: The puncture needle body (1) comprises a puncture section (11) and a push section (12), wherein the proximal end of the puncture section (11) is movably connected to the distal end of the push section (12); The distal end of the puncture section (11) is provided with a triangular prism (111), and the puncture section (11) can rotate axially along the pushing section (12).

2. The atrial septal puncture needle according to claim 1, characterized in that: The proximal outer peripheral surface of the puncture section (11) is provided with a clamping groove (112), and the clamping groove (112) is a groove structure in which the outer wall of the puncture section (11) is recessed in the radial direction.

3. The atrial septal puncture needle according to claim 2, characterized in that: A snap ring (121) is provided at the distal end of the pushing section (12), and the snap ring (121) is a protruding structure protruding radially from the outer wall of the pushing section (12); The clamping ring (121) is embedded in the clamping groove (112), the outer wall of the clamping ring (121) abuts against the outer wall of the clamping groove (112), and the clamping ring (121) can rotate axially along the clamping groove (112).

4. The atrial septal puncture needle according to claim 3, characterized in that: The outer diameter of the puncture section (11) is greater than or equal to the outer diameter of the pushing section (12).

5. A puncture mechanism, comprising the atrial septal puncture needle according to any one of claims 1 to 4, characterized in that: It also includes an inner tube (2), through which the puncture needle body (1) is guided. When the puncture needle body (1) enters the inner tube (2), it moves along the axial direction of the inner tube (2).

6. The puncture mechanism according to claim 5, characterized in that: The outer wall of the puncture section (11) is also provided with a boss (113), and the boss (113) is located at the proximal end of the puncture section (11).

7. The puncture mechanism according to claim 6, characterized in that: The inner wall of the inner tube (2) is also provided with a groove (21), and the groove (21) extends to the proximal opening of the inner tube (2); The puncture needle body (1) enters the inner tube (2), the boss (113) slides along the groove (21), and the groove (21) guides the boss (113).

8. The puncture mechanism according to claim 7, characterized in that: The inner wall of the distal end of the inner tube (2) is provided with a thread groove (22), and the groove (21) is connected to the proximal end of the thread groove (22); When the boss (113) enters the thread groove (22), the thread groove (22) guides the boss (113), and the boss (113) performs rotational motion along the thread groove (22).

9. A puncture instrument, using the puncture mechanism according to any one of claims 5 to 8 to perform atrial septal puncture, characterized in that: It also includes a puncture sheath tube (3), into which the puncture mechanism is inserted, the puncture sheath tube (3) comprising a first tube body (31) and a second tube body (32), the first tube body (31) and the second tube body (32) being connected via an expansion end (4), and the first tube body (31) being fixedly connected to the inner tube (2); The expansion end (4) comprises a metal mesh (41) and a polymer film (42), wherein the polymer film (42) covers the outer surface of the metal mesh (41), the distal end of the metal mesh (41) is fixed to the outer peripheral side of the first tube body (31), and the proximal end of the metal mesh (41) is fixed to the outer peripheral side of the second tube body (32).

10. The puncture instrument according to claim 9, characterized in that: It also includes a driving mechanism (6), which is connected to the puncture mechanism and is used to adjust the density and diameter of the metal mesh (41).

Images