Interatrial septal puncture device

Abstract

This application relates to a transseptal puncture device, which is easy to use. The transseptal puncture device includes: an inner needle, which includes a needle tip, an adapter, and a pusher connected in sequence; and an outer tube, which includes a tube body and a handheld control part disposed at the proximal end of the tube body. The tube body has a guidewire cavity and a connecting cavity, and the connecting cavity accommodates the adapter. The handheld control part includes a distal fixing member and a rotating part arranged in sequence from the distal end to the proximal end. The distal fixing member is fixedly connected to the proximal end of the tube body. The rotating part is rotatably engaged with the distal fixing member, and the rotating part is helically engaged with the pusher part to push the pusher part through the adapter to drive the needle tip to move axially.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a transseptal puncture device. Background Technology

[0002] Interventional therapy is a relatively effective treatment for cardiovascular diseases. When performing interventional procedures such as those for atrial fibrillation or atrial flutter, a puncture is often required to allow the interventional device to pass through the interatrial septum and reach the lesion. Therefore, interatrial septal puncture is one of the most common basic procedures in cardiovascular surgery. By puncturing the interatrial septum, a pathway is established between the left and right ventricles, facilitating surgery on the entire heart.

[0003] Current atrial septal puncture procedures typically utilize two key instruments: a dilator and a puncture needle. Specifically, firstly, guided by a guidewire and with the catheter sheath and dilator assembled, the sheath and dilator are inserted into the right atrium. Then, the puncture needle is advanced along the sheath / dilator, using its distal steel tip to puncture the atrial septum, allowing the dilator and catheter sheath to pass through. After the puncture needle has passed through the atrial septum, the dilator uses its distal tapered end to create a transition between the catheter sheath and the puncture needle, reducing resistance and minimizing the incision. Finally, the puncture needle and dilator are withdrawn sequentially, leaving the sheath for use with other instruments / procedures.

[0004] In other words, current atrial septal puncture procedures require the use of three instruments, which complicates the procedure, increases the time required, and raises the risk to the patient. Furthermore, there is no effective method for controlling the depth of the puncture needle, leading to serious medical accidents such as excessively deep insertion that punctures the heart. Utility Model Content

[0005] Therefore, it is necessary to provide an interatrial septal puncture device to address the inconvenience of using existing interatrial septal puncture devices.

[0006] A transseptal puncture device includes: an inner needle comprising a needle tip, an adapter, and a pusher connected in sequence; and an outer tube comprising a tube body and a handheld control portion disposed at the proximal end of the tube body. The tube body has a guidewire cavity and a connecting cavity, the connecting cavity accommodating the adapter. The handheld control portion includes a distal fixing member and a rotating portion arranged sequentially from the distal end to the proximal end. The distal fixing member is fixedly connected to the proximal end of the tube body. The rotating portion rotatably engages with the distal fixing member, and the rotating portion helically engages with the pusher portion to push the pusher portion through the adapter, thereby driving the needle tip to move axially.

[0007] In some embodiments, the tube body includes a receiving cavity for accommodating a needle, the receiving cavity having a limiting portion that restricts the range of movement of the needle proximally.

[0008] In some embodiments, both the connecting cavity and the adapter have annular radial cross-sections.

[0009] In some embodiments, the distal fixing member is provided with a first limiting cavity for accommodating the pushing part, the first limiting cavity being used to limit the range of axial movement of the pushing part toward the distal end.

[0010] In some embodiments, the distal fixing member is provided with a tube receiving cavity and a connecting base between the tube receiving cavity and the first limiting cavity. The tube receiving cavity accommodates and is fixedly connected to the proximal end of the tube. The connecting base is provided with a through hole, which corresponds axially to the connecting cavity.

[0011] In some embodiments, the handheld control unit further includes a proximal connector and a connecting rod, the connecting rod passing through the push part and both ends of the connecting rod being connected to the distal fixing member and the proximal connector, respectively; the rotating part is rotatably engaged with the proximal connector.

[0012] In some embodiments, the rotating part includes a first recess, an internal thread, and a second recess arranged sequentially from the distal end to the proximal end. The first recess is rotatably engaged with the distal end fixing member, and the first recess is rotatably engaged with the proximal end connector. The outer periphery of the pushing part is provided with a thread, and the pushing part is helically engaged with the internal thread.

[0013] In some embodiments, the proximal connector is provided with a second limiting cavity for accommodating the pusher portion, the second limiting cavity being used to limit the range of movement of the pusher portion toward the proximal end.

[0014] In some embodiments, the pushing part is provided with a central hole and a through hole, the proximal connector is provided with a channel, the central hole, the guide wire cavity and the channel are axially corresponding, and the connecting rod passes through the through hole.

[0015] In some embodiments, the pushing part is further provided with a fixing hole, which is fixedly connected to the adapter, and the fixing hole and the through hole are arranged at intervals around the central hole.

[0016] The aforementioned atrial septal puncture device has a connecting cavity to accommodate a connector, allowing the adapter to connect the needles and pusher on both sides. A rotating part is rotatably mounted on the distal fixing part and screw-fits the pusher. Therefore, when the rotating part rotates, the screw-fit pusher, via the adapter, drives the needle axially until the inner needle reaches the puncture depth. This application utilizes a threaded rotation method to control the insertion process, preventing injury to the patient due to operational errors. Furthermore, compared to existing atrial septal puncture devices, by combining the inner needle and outer tube into a single instrument with guide wire guidance and puncture function, the device eliminates the need for frequent instrument changes and insertion / withdrawal of the inner needle. The procedure can be completed in a single step, reducing surgical time, accelerating the overall procedure, and improving patient safety. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the interatrial septal puncture device in one embodiment.

[0018] Figure 2 for Figure 1 An exploded diagram of a room partition puncture device.

[0019] Figure 3 for Figure 1 Exploded view of the central and outer pipes.

[0020] Figure 4 for Figure 2 Side view of the central tube.

[0021] Figure 5 for Figure 2 A cross-sectional view of the central tube along the axial direction.

[0022] Figure 6 for Figure 2 Axonometric view of the inner needle.

[0023] Figure 7 for Figure 3 A schematic diagram of the mid-to-rear end fixing component.

[0024] Figure 8 for Figure 7 Side view of the distal fastener.

[0025] Figure 9 for Figure 7 A side view of the distal fastener from another direction.

[0026] Figure 10 for Figure 9 Sectional view along the AA direction.

[0027] Figure 11 for Figure 3A schematic diagram of the rotating part.

[0028] Figure 12 for Figure 11 Side view of the rotating part.

[0029] Figure 13 for Figure 12 A cross-sectional view of BB.

[0030] Figure 14 for Figure 3 A schematic diagram of the proximal end fixing component.

[0031] Figure 15 for Figure 14 Side view with the proximal end fixed.

[0032] Figure 16 for Figure 15 A cross-sectional view along the CC direction.

[0033] Figure 17 for Figure 6 A schematic diagram of the push section.

[0034] Figure 18 for Figure 17 Side view of the push section.

[0035] Figure 19 for Figure 18 A sectional view along the DD direction.

[0036] Figure label:

[0037] 100. Atrial septal puncture device; 1. Outer tube; 11. Tube body; 111. Guide wire lumen; 112. Connecting lumen; 113. Tip; 1131. Receiving cavity; 1132. Limiting part; 12. Handheld control part; 121. Distal fixation component; 1211. Tube body receiving cavity; 1212. First protrusion; 1213. Connecting base; 1214. First limiting cavity; 1215. Through hole; 1216. First blind hole; 122. Rotating part; 1221. The first... 1. Recessed portion; 1222. Second recessed portion; 1223. Internal threaded portion; 1224. Anti-slip texture; 123. Proximal connector; 1231. Interface; 12311. Channel; 1232. Second protrusion; 1233. Second limiting cavity; 1234. Second blind hole; 124. Connecting rod; 2. Inner needle; 21. Needle tip; 22. Adapter; 23. Pushing portion; 231. External thread; 232. Through hole; 233. Fixing hole; 234. Center hole. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0039] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0040] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] It is important to understand that the terms "proximal" and "posterior," and "distal" and "anterior" used in this article are relative to the clinician (operator) manipulating the septal puncture device. The terms "proximal" and "posterior" refer to the part closer to the clinician, while the terms "distal" and "anterior" refer to the part farther away from the clinician.

[0044] See Figures 1 to 6 One embodiment of this application provides an atrial septal puncture device 100, which includes an inner needle 2 and an outer tube 1.

[0045] See Figures 2 to 5 The outer tube 1 includes a tube body 11 and a handheld control unit 12 disposed at the proximal end of the tube body 11. The tube body 11 has a guidewire cavity 111 and a connecting cavity 112, the connecting cavity 112 accommodating an adapter 22. The handheld control unit 12 includes a distal fixing member 121 and a rotating part 122 arranged sequentially from the distal end to the proximal end. The distal fixing member 121 is fixedly connected to the proximal end of the tube body 11, the rotating part 122 is rotatably engaged with the distal fixing member 121, and the rotating part 122 is helically engaged with the pushing part 23 to push the pushing part 23 through the adapter 22, thereby driving the needle tip 21 to move axially. (See reference...) Figure 6 The inner needle 2 includes a needle tip 21, an adapter 22, and a pusher 23 connected in sequence.

[0046] The outer tube 1 is used to allow the interventricular septal puncture device 100 to enter the human body under the guidance of the guidewire. Specifically, the tube body 11 also includes a guidewire lumen 111. Optionally, the tube body 11 is cylindrical. Both the guidewire lumen 111 and the connecting lumen 112 extend along the length direction of the tube body 11 (i.e., the axial direction of the tube body 11).

[0047] The guidewire lumen 111, located at the center of the tube body 11, is used to pass through the guidewire. The guidewire lumen 111 and the connecting lumen 112 are arranged radially along the tube body 11. The distal end of the tube body 11 has a tip 113. The diameter of the tip 113 gradually decreases from proximal to distal. This arrangement facilitates entry into the human body while preventing injury during insertion. The tip 113 also includes a receiving cavity 1131 for accommodating the needle 21.

[0048] At least two connecting cavities 112 are provided. The connecting cavities 112 are used to accommodate the connector, so that the adapter 22 can connect the needles 21 and the pusher 23 on both sides.

[0049] Optionally, the tube 11 may be at least partially malleable from distal to proximal; that is, it may be bent so that the surgeon can shape the tube 11 according to a three-dimensional image of the patient's heart during the procedure to facilitate its entry into the heart.

[0050] The handheld control unit 12 is located at the proximal end of the tube body 11 and is used to control the inner needle 2. Controlling the handheld control unit 12 at the proximal end causes the inner needle 2 to move distally, thereby achieving puncture of the target tissue. The rotation of the handheld control unit 12 does not cause the tube body 11 to rotate.

[0051] The handheld control unit 12 includes a distal fixing member 121 and a rotating part 122. The distal fixing member 121 is fixedly connected to the proximal end of the tube body 11. The rotating part 122 is rotatably connected to the distal fixing member 121. Furthermore, the rotating part 122 is screwed into the pusher 23 to push the pusher 23 through the adapter 22, thereby driving the needle 21 to move axially.

[0052] In this embodiment, the connecting cavity 112 accommodates the adapter 22, allowing the adapter 22 to connect the needles 21 and the pusher 23 on both sides. The rotating part 122 is rotatably disposed on the distal fixing member 121 and screws into the pusher 23. Therefore, when the rotating part 122 rotates, the screw engagement pushes the pusher 23 through the adapter 22, causing the needle 21 to move axially until the needle 21 of the inner needle 2 reaches the puncture depth. This application uses a screw-rotated mechanism to make the insertion process controllable, avoiding injury to the patient due to operational errors.

[0053] Existing transseptal puncture devices consist of a separate sheath, dilator, and puncture needle. The dilator must be guided to the designated position via a guidewire before the puncture needle is inserted along the dilator to complete the transseptal puncture. This application improves upon this by incorporating a nested outer tube 1 and inner needle 2. The outer tube 1 serves as a guidewire guide, while the inner needle 2 performs the puncture, effectively combining the sheath, puncture needle, and dilator into one device for easier use. The procedure can be completed in a single step, reducing surgical time. Furthermore, the puncture process of the puncture needle has been optimized and improved by using a threaded rotation mechanism, making the insertion process controllable and preventing injury to the patient due to operational errors.

[0054] In some embodiments, reference Figure 5The tube body 11 includes a receiving cavity 1131 for receiving the needle 21, and a limiting part 1132 is provided in the receiving cavity 1131 to limit the range of movement of the needle 21 proximally. The limiting part 1132 limits the range of retraction of the needle 21 proximally and ensures that the needle 21 can be completely received in the receiving cavity 1131 when it retracts.

[0055] In some embodiments, reference Figures 7 to 10 The distal fixing member 121 is provided with a first limiting cavity 1214 for accommodating the pushing part 23. The first limiting cavity 1214 is used to limit the range of axial movement of the pushing part 23 to the distal end.

[0056] The first limiting cavity 1214 is specifically located at the proximal end of the distal fixation member 121. The pushing part 23 is accommodated in the first limiting cavity 1214 and is screwed into the rotating part 122. The distal end of the first limiting cavity 1214 can limit the range of motion of the pushing part 23, thereby controlling the puncture depth.

[0057] The distal fixing member 121 is provided with a first limiting cavity 1214, a tube receiving cavity 1211, and a connecting base 1213 between the tube receiving cavity 1211 and the first limiting cavity 1214. The connecting base 1213 forms the distal end wall of the first limiting cavity 1214. The tube receiving cavity 1211 accommodates and is fixedly connected to the proximal end of the tube 11. The connecting base 1213 is provided with a through hole 1215, which corresponds axially to the connecting cavity 112.

[0058] The tube body receiving cavity 1211, the connecting base 1213, and the first limiting cavity 1214 are arranged sequentially from the distal end to the proximal end of the tube body 11. The inner diameter of the tube body receiving cavity 1211 is larger than the inner diameter of the first limiting cavity 1214. The number of through holes 1215 is the same as the number of connecting cavities 112. The proximal end of the tube body 11 is inserted into and fixed in the tube body receiving cavity 1211. The pushing part 23 is accommodated in the first limiting cavity 1214. The connecting member passes through the through hole 1215.

[0059] Optionally, the distal fixing member 121 includes a main body having a tube-shaped receiving cavity 1211 and a first protrusion 1212. The outer diameter of the main body is larger than the outer diameter of the first protrusion 1212. A first limiting cavity 1214 is provided within the first protrusion 1212, and the first limiting cavity 1214 passes through the proximal end of the first protrusion 1212 and extends into the main body. A rotating part 122 is fitted onto the first protrusion 1212. A shoulder is formed between the first protrusion 1212 and the main body to limit the rotating part 122.

[0060] Through the above design, the pushing part 23 of the inner needle 2 can be axially movable in the first limiting cavity 1214, and its range of movement to the distal end is limited by the connecting base 1213, thereby controlling the puncture depth.

[0061] In some embodiments, reference Figure 8 Both the connecting cavity 112 and the adapter 22 have annular radial cross-sections. Specifically, the adapter 22 is a sheet-like structure with an annular cross-section. The radial cross-section of the connecting cavity 112 has an annular profile.

[0062] The needle 21 has a hollow structure to accommodate the passage of the guidewire, and its radial cross-section is annular. To ensure the passage of the guidewire, the tube body 11 must prioritize the provision of the guidewire cavity 111. This results in limitations on the size and space of the connecting cavity 112.

[0063] In this embodiment, to ensure pushing performance, the radial cross-sections of both the connecting cavity 112 and the adapter 22 are annular; this allows the adapter 22 to fit the needle 21 to the maximum extent, avoiding problems such as bending and insufficient force-bearing surface making transmission difficult. Simultaneously, the annular radial cross-sections of both the connecting cavity 112 and the adapter 22, when combined, prevent rotation of the connecting part, ensuring that the pushing part 23 drives the adapter 22 to move axially smoothly.

[0064] In some embodiments, reference Figure 2 , Figure 3 , Figures 11 to 16 The handheld control unit 12 also includes a proximal connector 123 and a connecting rod 124. The connecting rod 124 passes through the push unit 23, and its two ends are respectively connected to the distal fixing member 121 and the proximal connector 123. The rotating part 122 is rotatably engaged with the proximal connector 123. The proximal connector 123 is used to connect with the distal fixing member 121 and support the rotating part 122, and is also used to connect with other devices.

[0065] Specifically, refer to Figures 11 to 13 The rotating part 122 includes a first recessed part 1221, an internally threaded part 1223, and a second recessed part 1222, arranged sequentially from the distal end to the proximal end. The first recessed part 1221 is rotatably engaged with the distal fixing member 121, and the first recessed part 1221 is rotatably engaged with the proximal connecting member 123. The outer periphery of the pushing part 23 is provided with an external thread 231, and the pushing part 23 is helically engaged with the internally threaded part 1223. The outer surface of the rotating part 122 is also provided with anti-slip textures 1224 to increase friction and facilitate operation. Through the above method, the rotating part 122 is rotatably engaged with the distal fixing member 121 and the proximal connecting member 123.

[0066] refer to Figure 8 A first blind hole 1216 is provided on the connecting base 1213 of the distal fixing member 121. (Reference) Figures 14 to 16 The proximal connector 123 includes an interface 1231, a second protrusion 1232, a second limiting cavity 1233, and a second blind hole 1234. The second blind hole 1234 corresponds to the first blind hole 1216 in the axial direction. (Reference) Figure 17The pusher section 23 is provided with a perforation 232.

[0067] In this embodiment, the interface 1231 is specifically configured as a Chinese national standard Luer connector for easy connection and fixation with other instruments. In this embodiment, the interface 1231 and the second protrusion 1232 are arranged sequentially from the proximal end to the distal end of the tube body 11. The second limiting cavity 1233 is located in the second protrusion 1232. The second blind hole 1234 is located on the step between the interface 1231 and the second protrusion. The connecting rod 124 passes through the through hole 232 and connects to both the first blind hole and the second blind hole 1234, thereby achieving the connection between the distal fixation member 121 and the proximal fixation member.

[0068] The proximal connector 123 is provided with a second limiting cavity 1233 to accommodate the pusher 23, which limits the range of movement of the pusher 23 towards the proximal end. Thus, the pusher 23 passes through the internal thread 1223, and both ends of the pusher 23 are respectively confined within the first limiting cavity 1214 and the second limiting cavity 1233. When the rotating part 122 is rotated, the connecting rod 124 restricts the rotation of the pusher 23, thereby driving the pusher 23 to move axially through the internal thread 1223. The range of movement of the pusher 23 towards the distal and proximal ends is limited by the first limiting cavity 1214 and the second limiting cavity 1233, respectively.

[0069] In this application, the pusher 23 is limited between the first limiting cavity 1214, the second limiting cavity 1233, and the internal thread 1223 in the handheld control part 12. At the same time, the limiting part 1132 in the receiving cavity 1131 of the tip 113 also limits the retraction range of the needle 21. The above measures limit the distance that the rotating part 122 can move the needle 21 back and forth, ensuring that the needle 21 can be completely contained in the receiving cavity 1131 when it retracts, and will not completely detach from the receiving cavity 1131 when it extends for puncture, thus avoiding detachment and ensuring safety.

[0070] In some embodiments, reference Figures 16 to 19 The pushing part 23 is provided with a central hole 234, and the proximal connector 123 is provided with a channel 12311 communicating with the second limiting cavity 1233. The central hole 234, the guide wire cavity 111 and the channel 12311 are axially corresponding. The channel 12311 is specifically set in the interface 1231, passing through the proximal end and the distal end of the interface 1231.

[0071] With the above configuration, the guidewire can be inserted through the channel 12311 and then extended into the guidewire cavity 111, so that the configuration of the proximal connector 123 does not affect the insertion of the guidewire.

[0072] In some embodiments, reference Figure 17The pusher 23 is also provided with a fixing hole 233, which is fixedly connected to the adapter 22. The fixing hole 233 and the through hole 232 are arranged at intervals around the central hole 234.

[0073] The number of fixing holes 233 is the same as the number of connecting cavities 112, and they are arranged one-to-one in the axial direction. In this way, the adapter 22 can be inserted and fixed in the fixing holes 233 one by one, so that the adapter 22 connects the needle 21 to the push part 23.

[0074] The atrial septal puncture device 100 of this application combines the inner needle 2 and the outer tube 1 to form a single instrument. During use, there is no need to frequently change the instruments used, nor is it necessary to insert / withdraw the inner needle 2 into the (human body), which speeds up the entire operation and improves patient safety.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An atrial septal puncture device, characterized by, The transseptal puncture device includes: The inner needle includes a needle tip, an adapter, and a pusher connected in sequence. The outer tube includes a tube body and a handheld control part disposed at the proximal end of the tube body. The tube body has a guide wire cavity and a connecting cavity. The connecting cavity accommodates the adapter. The handheld control part includes a distal fixing member and a rotating part arranged sequentially from the distal end to the proximal end. The distal fixing member is fixedly connected to the proximal end of the tube body. The rotating part is rotatably engaged with the distal fixing member. The rotating part is helically engaged with the pushing part to push the pushing part through the adapter and drive the needle to move axially.

2. The atrial septostomy device of claim 1, wherein, The tube body includes a receiving cavity for accommodating the needle, and the receiving cavity is provided with a limiting part that restricts the range of movement of the needle proximally.

3. The device according to claim 1, wherein Both the connecting cavity and the adapter have annular radial cross-sections.

4. The device according to claim 1, wherein The distal fixing member is provided with a first limiting cavity for accommodating the pushing part, and the first limiting cavity is used to limit the range of axial movement of the pushing part to the distal end.

5. The atrial septal puncture device according to claim 4, characterized in that, The distal fixing member is provided with a tube receiving cavity and a connecting base between the tube receiving cavity and the first limiting cavity. The tube receiving cavity accommodates and is fixedly connected to the proximal end of the tube. The connecting base is provided with a through hole, which corresponds axially to the connecting cavity.

6. The atrial septal puncture device according to claim 1, characterized in that, The handheld control unit also includes a proximal connector and a connecting rod. The connecting rod passes through the pushing part and its two ends are respectively connected to the distal fixing part and the proximal connector. The rotating part is rotatably engaged with the proximal connector.

7. The atrial septal puncture device according to claim 6, characterized in that, The rotating part includes a first recessed part, an internal threaded part, and a second recessed part arranged sequentially from the distal end to the proximal end. The first recessed part and the distal end fixing member are rotatably engaged, and the first recessed part is rotatably engaged with the proximal end connecting member. The outer periphery of the pushing part is provided with threads, and the pushing part is helically engaged with the internal threaded part.

8. The transseptal puncture device according to claim 6, characterized in that, The proximal connector is provided with a second limiting cavity for accommodating the pusher portion, the second limiting cavity being used to limit the range of movement of the pusher portion toward the proximal end.

9. The atrial septal puncture device according to claim 6, characterized in that, The pushing part is provided with a central hole and a through hole, and the proximal connector is provided with a channel. The central hole, the guide wire cavity and the channel are axially corresponding, and the connecting rod passes through the through hole.

10. The atrial septal puncture device according to claim 9, characterized in that, The pushing part is also provided with a fixing hole, which is fixedly connected to the adapter. The fixing hole and the through hole are arranged at intervals around the central hole.

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