CN115317088A - Puncture device - Google Patents

Abstract

The application provides a puncture device. The puncture device comprises a handle assembly and a puncture assembly contained in the handle assembly and fixedly connected with the handle assembly, the puncture assembly comprises a puncture piece, the handle assembly further comprises a first control piece used for controlling the puncture piece, and when the first control piece rotates, the first control piece controls the puncture piece to be close to or far away from the handle assembly. The first control piece controls the puncture piece to be close to or far away from the handle assembly, so that the first control piece can control the puncture piece to penetrate out of the handle assembly, the operation is easy, and the puncture piece can be controlled to perform puncture operation conveniently. Can avoid the puncture of the human body caused by the continuous movement of the puncture piece after the puncture is successful due to inertia in the traditional puncture operation process.

Description

Puncture device

Technical Field

The invention relates to the field of medical instruments, in particular to a puncture device.

Background

Conventional puncture needles are made of a stainless steel tube. In a conventional puncturing procedure, a surgeon generally holds the joint of the puncturing member by hand and applies a pushing force to the joint of the puncturing member to cause the needle tip of the puncturing member to puncture the atrial septum. Due to the inertia effect, after the doctor punctures the interatrial septum by the puncture piece, the hand of the doctor continues to push the joint of the puncture piece, so that the needle point of the puncture piece continues to move, the stroke is too large, the left atrial wall is easy to puncture, and the pericardium is filled. Alternatively, the aorta is easily punctured causing serious complications.

Disclosure of Invention

Based on this, it is necessary to provide a puncturing device to avoid the puncturing member from easily going further after puncturing the interatrial septum in the puncturing operation.

The puncture device comprises a handle assembly and a puncture assembly contained in the handle assembly and fixedly connected with the handle assembly, the puncture assembly comprises a puncture piece, the handle assembly further comprises a first control piece used for controlling the puncture piece, and when the first control piece rotates, the first control piece controls the puncture piece to be close to or far away from the handle assembly.

The first control piece controls the puncture piece to be close to or far away from the handle assembly, so that the first control piece can control the puncture piece to penetrate out of the handle assembly, the operation is easy, and the puncture piece can be controlled to perform puncture operation conveniently. Can avoid the puncture of the human body caused by the fact that the puncture piece continues to move after the puncture is successful due to inertia in the traditional puncture operation process.

Drawings

Fig. 1 is a schematic structural view of a puncture device according to a first embodiment of the present application.

Fig. 2 is an exploded view of a puncture device according to a first embodiment of the present application.

Fig. 3 is a schematic view of the spike assembly of the first embodiment of the present application in a stowed condition.

Fig. 4a is a schematic top view of the handle body according to the first embodiment of the present application.

Fig. 4b is a schematic view of the first handle member, the first control member and the second control member.

Fig. 4c is a schematic view of the second handle member, the first control member, and the second control member.

Fig. 5 is a schematic view of the spike assembly of the first embodiment of the present application in an extended condition.

FIG. 6a is a schematic view showing the connection of the first fixing member, the second fixing member, the outer tube member and the puncturing member.

Fig. 6b is a schematic structural diagram of the first fixing member.

Fig. 7 is a structural schematic diagram of a part of the second control piece.

Fig. 8a is a schematic structural diagram of a second fixing member.

Fig. 8b is a top view of the second fixing member.

Fig. 8c is a schematic structural view of the sealing member.

Fig. 9 is a schematic view of a bending deformation of the puncture assembly in the first embodiment of the present application.

Fig. 10 is a schematic view of the structure of the piercing member in the first embodiment of the present application.

Fig. 11a is a schematic view of a supporting portion and a main body portion in a second embodiment of the present application.

Fig. 11b is a schematic view of the distal end of a spike assembly in a second embodiment of the present application.

Fig. 11c is an enlarged schematic view of the structure at X in fig. 11b.

Fig. 12 is a schematic view of a bending element according to a second embodiment of the present application.

Fig. 13 is a schematic view of a bending element according to a third embodiment of the present application.

Fig. 14 is a schematic structural view of a puncture device according to a fourth embodiment of the present application.

Fig. 15 is a schematic cross-sectional view of fig. 14.

Fig. 16 is an enlarged schematic view of fig. X of fig. 15.

Fig. 17 is a schematic cross-sectional view at another angle in fig. 14.

Fig. 18 is an exploded view of a fourth embodiment of the present application.

Fig. 19 is a schematic structural diagram of a first control member in a fourth embodiment of the present application.

Fig. 20 is a schematic structural view of the erroneous contact prevention member in the fourth embodiment of the present application.

Fig. 21 is a schematic cross-sectional structural view of the error preventing contact in the fifth embodiment of the present application.

Fig. 22 is an enlarged schematic view of XX in fig. 21.

FIG. 23 is an enlarged view of a position XX in another embodiment.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

In the field of interventional medical devices, the "distal end" is defined as the end that is distal from the operator during the procedure, and the "proximal end" is defined as the end that is proximal to the operator during the procedure. "axial" refers to a direction parallel to the line connecting the center of the distal end and the center of the proximal end of the medical device, and "radial" refers to a direction perpendicular to the axial direction.

Referring to fig. 1 to 5, a puncturing device 1 is provided according to a first embodiment of the present invention, and the puncturing device 1 is used for puncturing a human body. Particularly but not exclusively to fossa ovalis puncture, interatrial puncture, or puncture in transjugular intrahepatic portosystemic shunt. In the present embodiment, the puncture device 1 punctures the fossa ovalis will be described as an example.

Referring to fig. 1 to 3, the puncturing device 1 comprises a handle assembly 10 and a puncturing assembly 20 housed in the handle assembly 10 and fixedly connected to the handle assembly 10.

Spike assembly 20 includes an external tube 23 and a spike 24. The outer tube 23 comprises an outer tube 21. The piercing member 24 includes a piercing needle 22. The outer tube 21 is connected to the handle assembly 10. The outer tube 21 has a hollow tubular shape. In the present embodiment, the puncture needle 22 is inserted into the outer tube 21. At least a part of the puncture needle 22 is housed in the outer tube 21. In the present embodiment, the extending direction of the puncture needle 22 in the outer tube 21 is the same as the extending direction of the outer tube 21. The distal end 22a of the piercing needle 22 is adjacent the distal end 21a of the outer tube 21. The proximal end 22b of the needle 22 extends out of the proximal end 21b of the outer tube 21.

In this embodiment, at least a portion of the piercing needle 22 is housed within the outer tube 21 with the distal end 22a of the piercing needle 22 being proximal to the distal end 21a of the outer tube. The puncture needle 22 is moved into the inside of the human body together with the outer tube 21. During the puncture operation, the puncture needle 22 does not need to be inserted from the proximal end 21b of the outer tube 21 and then slide to the distal end 21a of the outer tube 21, so that the inner wall of the outer tube 21 is prevented from being damaged to generate debris during the sliding process of the puncture needle 22 in the outer tube 21, and the risk of the patient being harmed by the thrombus formed by the debris is reduced.

In the present embodiment, the fact that the distal end 22a of the puncture needle 22 is close to the distal end 21a of the outer tube 21 means that the distal end 22a of the puncture needle 22 is close to the end surface of the distal end 21a of the outer tube 21, and the end surface of the distal end 22a of the puncture needle 22 is not flush with the end surface of the distal end 21a of the outer tube 21, i.e., the puncture needle 22 is accommodated in the outer tube 21 or a part of the puncture needle 22 is exposed outside the outer tube 21.

In the present embodiment, the distal end 22a of the puncture needle 22 is always accommodated in the outer tube 21 without exposing the outer tube 21 in the course of sliding the outer tube 21 to a designated area of the human body. For example, during the process that the outer tube 21 slides to the vicinity of the fossa ovalis of the heart, the outer tube 21 can be bent and deformed when meeting the bent blood vessel channel of the human body, and the puncture needle 22 does not expose the outer tube 21, so that the puncture needle 22 is prevented from stabbing the human body.

In this embodiment, the needle 22 extends through the outer tube 21, with the proximal end 22b of the needle 22 also being adjacent the proximal end 21b of the outer tube 21. Specifically, the proximal end 22b of the piercing needle 22 extends beyond the proximal end 21b of the outer tube 21.

Referring to fig. 1 and 2, in the present embodiment, the handle assembly 10 has a receptacle 113. The receptacle 113 receives part of the puncture assembly 20. The accommodation member 113 accommodates the proximal end of the puncture needle 22 and the proximal end of the outer tube 21. Specifically, the handle assembly 10 includes a handle body 11. The handle body 11 includes a first handle member 111 and a second handle member 112 connected to the first handle member 111. In the present embodiment, the accommodating space surrounded by the first handle member 111 and the second handle member 112 is an accommodating member 113.

Referring to fig. 4a, 4b and 4c, the first handle member 111 is provided with a fastener 1112. The second handle member 112 is provided with a retainer 1122. In the embodiment, the fastening member 1112 protrudes from the first handle member 111 in the axial direction close to the handle assembly 10, and the fastening member 1112 is hook-shaped as a whole. Snap 1112 protrudes in a negative Y-axis direction. The retainer 1122 is recessed from the second handle member 112 in an axial direction away from the handle assembly 10, and the retainer 1122 is generally in the form of a groove. In FIG. 4c, the retainer 1122 is concave toward the negative Y-axis. The retainer 1122 cooperates with the fastener 1112 to secure the first handle 111 and the second handle 112 together. It is understood that, in other embodiments, the fastening element 1112 can be a groove, and the holding element 1122 can be a boss.

In this embodiment, the first handle member 111 is fixedly connected to the second handle member 112. In particular, glue (not shown) is further provided between the first handle member 111 and the second handle member 112, which glue fixedly connects the first handle member 111 and the second handle member 112. In other embodiments, the first handle member 111 and the second handle member 112 may be engaged with the locking member having an internal thread by other means, such as melting at high temperature, etc., or by providing a thread on the outer wall of the first handle member 111 and a thread on the outer wall of the second handle member 112. The specific manner is not limited, so that the first handle member 111 and the second handle member 112 can be fixed.

It will be appreciated that in other embodiments, the handle assembly 10 may be integrally formed. That is, the first and second handle members 111, 112 are integrally molded.

Referring to fig. 1, 3 and 5, in the present embodiment, the puncturing assembly 20 can slide relative to the handle assembly 10 in the axial direction. Specifically, the puncture needle 22 in the puncture assembly 20 is slidable in the axial direction with respect to the handle body 11 in the handle assembly 10. The spike assembly 20 has a stowed condition and an extended condition. Wherein, the accommodating state and the extending state can be mutually converted. The extended state means that a portion of the distal end 22a of the piercing needle 22 is exposed outside the distal end 21a of the outer tube 21. The accommodated state means that the distal end 22a of the puncture needle 22 is accommodated in the distal end 21a of the outer tube 21.

The handle assembly 10 also includes a first control member 12. The first control member 12 is provided at least one of the first and second handle members 111 and 112. Referring to fig. 1 and 2, in the present embodiment, the number of the first control members 12 is two, and the two first control members are respectively disposed on the first handle member 111 and the second handle member 112. The first control member 12 is connected to the proximal end of the piercing needle 22. The first control member 12 is used for controlling the puncture needle 22 to slide in the axial direction relative to the handle body 11. That is, referring to fig. 5, the first control member (not shown) can control the puncture needle 22 to slide in the axial direction, so that the distal end 22a of the puncture needle 22 extends out of the outer tube 21. Referring to fig. 3, alternatively, the distal end 22a of the needle 22 is controlled to extend into the outer tube 21.

It will be appreciated that the first control member 12, upon receiving an external force, transmits the force to the puncture needle 22, causing the puncture needle 22 to slide in the axial direction. In the present embodiment, the first control member 12 receives an external action to slide axially relative to the handle body 11. The first control member 12 is connected with the puncture needle 22, and the first control member 12 carries the puncture needle 22 to slide, so that the puncture needle 22 penetrates out of the outer tube 21 to perform puncture operation. It will be appreciated that in this embodiment, the first control member 12 is indirectly connected to the proximal end of the penetrating needle 22. In other embodiments, the first control member 12 may be directly connected to the penetrating needle 22.

At least one of the first and second handle members 111 and 112 is provided with a first limit hole 1111. The first limit hole 1111 limits a stroke of the first control member 12. The first limiting hole 1111 is connected to the accommodating member 113. Referring to fig. 2, fig. 4a, fig. 4b and fig. 4c, in the present embodiment, the first handle member 111 and the second handle member 112 are both provided with a first limiting hole 1111. The first limiting hole 1111 in the first handle part 111 and the first limiting hole 1111 in the second handle part 112 have the same shape, and the first limiting hole 1111 in the first handle part 111 and the first limiting hole 1111 in the second handle part 112 are opposite. In this embodiment, the first position-limiting hole 1111 is a through hole. It is understood that in other embodiments, there may be only one first control element 12 and the first limiting hole 1111 used in cooperation with the first control element 12.

Referring to fig. 2, in the present embodiment, the puncturing element 24 further includes a first fixing element 13. The first fixing member 13 is accommodated in the accommodating member 113. The first fixing member 13 is attached to the proximal end (not shown) of the puncture needle 22. Specifically, the first fixing piece 13 includes a first fixing piece body 131. The proximal end of the puncture needle 22 extends into the first holder body 131 and is fixedly connected to the first holder body 131. It can be understood that at least a portion of the first fixing member body 141 is opposite to the first position-limiting hole 1111. That is, the projection of the first limiting hole 1111 inward in the radial direction at least partially falls on the first fixing member body 131. In the embodiment, the first control member 12 receives external action to axially slide relative to the handle body 11, and the first control member 12 drives the first fixing member 13 and the puncture needle 22 to axially slide relative to the handle body 11. In other embodiments, the external force directly acts on the first fixing member 13, so that the first fixing member 13 slides relative to the handle body 11 in the axial direction, and the first fixing member 13 drives the puncture needle 22 to slide relative to the handle body 11 in the axial direction.

Referring to fig. 2, in the present embodiment, the first fixing element 13 further includes a first fixing portion 132 connected to the first fixing element body 131. The first fixing portion 132 is connected to an outer wall of the first fixing body 131. In the embodiment, the first fixing portion 132 is integrally formed with the first fixing body 131. The first fixing portion 132 passes through the first limiting hole 1111 and is connected to the first control member 12. Specifically, the first fixing portion 132 is disposed at an outer wall of the first fixing member 13 and protrudes radially outward at the outer wall of the first fixing member 13. After passing through the first limiting hole 1111, a part of the first fixing portion 132 is connected to the first control member 12. It can be understood that a portion of the first fixing portion 132 is opposite to the first limiting hole 1111. That is, a part of the first fixing portion 132 is opposite to the hole wall of the first limiting hole 1111.

In the embodiment, the first fixing portion 132 passes through a portion of the first limiting hole 1111 and is fixedly connected to the first control member 12. Specifically, the first control member 12 is provided with a first catch 121. The first fixing portion 132 extends into the first retaining portion 121 and is fixedly connected to the first retaining portion 121. The first catching portion 121 is a groove. The first fixing portion 132 is in interference fit with the first retaining portion 121. In other embodiments, the first clamping portion 121 and the first fixing portion 132 are further adhered by glue, so that the first clamping portion 121 and the first fixing portion 132 are stably connected.

In the embodiment, the number of the first fixing portions 132, the number of the first limiting holes 1111, and the number of the first control members 12 are the same. That is, the number of the first fixing portions 132 is two, and the first fixing portions pass through the first limit hole 1111 of the first handle 111 and the first limit hole 1111 of the second handle 112, respectively. The two first fixing portions 132 are symmetrically distributed about the axial direction of the handle assembly 10, so that the whole first fixing member 13 is uniformly stressed, and the first fixing member 13 can smoothly slide in the axial direction relative to the handle body 11. In other embodiments, the number of the first fixing portions 132 is not limited, so that the first control member 12 can control the puncture needle 22 to slide through the first fixing portions 132. In other embodiments, the first fixing portion 132 is a groove, and is inserted into the first holding portion 121 and fixed in the first fixing portion 132.

Referring to fig. 4a, 4b and 4c, in the present embodiment, the first position-limiting hole 1111 includes a first position-limiting portion 1111a and a second position-limiting portion 1111b opposite to the first position-limiting portion 1111 a. The first limit portion 1111a and the second limit portion 1111b are arranged at an interval in the axial direction. The first limiting portion 1111a and the second limiting portion 1111b are two opposite hole walls of the first limiting hole 1111. The other hole walls of the first limiting hole 1111, the first limiting portion 1111a and the second limiting portion 1111b enclose a first limiting hole 1111. The first position-limiting portion 1111a is a distal end of the first position-limiting hole 1111, and the second position-limiting portion 1111b is a proximal end of the first position-limiting hole 1111.

The first limit hole 1111 limits an axial stroke of the first control member 12. That is, the first stopper 1111a and the second stopper 1111b restrict the axial stroke of the first control member 12, and thereby restrict the axial stroke of the first fixing member 13 and the puncture needle 22. The sliding of the puncture needle 22 in the axial direction is specifically performed as follows.

Referring to fig. 2, fig. 4b, fig. 4c and fig. 5, on one hand, the first control member 12 slides from the proximal end of the first position-limiting hole 1111 to the distal end of the first position-limiting hole 1111, the first control member 12 drives the first fixing portion 132 and the puncture needle 22 to slide in the direction away from the proximal end 11b of the handle body 11, and the puncture needle 22 gradually extends out of the outer tube 21. The first fixing portion 132, a portion of which is opposite to the first limiting hole 1111, is limited by the distal end of the first limiting hole 1111 after abutting against the distal end of the first limiting hole 1111. The first fixing portion 132 cannot be slid further in a direction away from the proximal end 11b of the handle body 11. The puncture needle 22 and the first control member 12 cannot be slid further in the direction away from the proximal end 11b of the handle body 11.

On the other hand, the first control member 12 slides from the distal end of the first stopper hole 1111 toward the proximal end of the first stopper hole 1111. The first control member 12 drives the first fixing portion 132 and the puncture needle 22 to slide toward the proximal end 11b of the handle body 11. The first fixing portion 132, which is partially opposite to the first limiting hole 1111, is abutted against the proximal end of the first limiting hole 1111 and then limited by the second limiting portion 1111b. The first fixing portion 132 cannot slide in a direction close to the proximal end 11b of the handle body 11. The puncture needle 22 and the first control member 12 cannot be slid further in the proximal direction of the handle body 11.

In this embodiment, the cross-sectional area of the first fixing element body 131 is larger than the first limiting hole 1111, so that the first fixing element body 131 cannot pass through the first limiting hole 1111, and the first fixing element 13 is not easily separated from the handle body 11.

The axial distance D1 between the first stopper 1111a and the second stopper 1111b corresponds to the stroke of the entire puncture needle 22 in one puncture process. The stroke of the first control member 12 sliding in the first stopper hole 1111 in the direction away from the proximal end of the handle body 11 is the same as the stroke of the entire puncture needle 22 sliding. Because the puncture needle 22 bends in the human body, the stroke of the distal end of the puncture needle 22 is less than or equal to the stroke of the entire puncture needle 22 and less than or equal to the axial distance between the first limit portion 1111a and the second limit portion 1111b.

In a conventional puncturing procedure, a surgeon generally holds the joint of the puncturing member by hand and applies a pushing force to the joint of the puncturing member to cause the needle tip of the puncturing member to puncture the atrial septum. Due to the inertia effect, after the doctor punctures the interatrial septum by the puncture piece, the hand of the doctor continues to push the joint of the puncture piece, so that the needle point of the puncture piece continues to move, and the stroke is overlarge. This easily punctures the left atrial wall, resulting in pericardial tamponade. Alternatively, the aorta is easily punctured causing serious complications. And the pushing force exerted by the doctor on the joint of the puncture piece is uneven, so that the puncture piece slides in the sheath. After the puncture needle 22 in the application punctures the interatrial septum, the puncture needle is limited by the first limit hole 1111 and cannot move forward continuously, the puncture needle 22 is prevented from puncturing the left atrial wall continuously, and the safety degree of the puncture operation by the puncture needle 22 is improved. Furthermore, the two first control members 12 are respectively arranged on the first handle member 111 and the second handle member 112, and the acting force applied by the doctor is transmitted to the puncture needle 22 by pushing the two first control members 12, so that the acting force applied to the puncture needle 22 is more uniform, the puncture needle 22 can smoothly slide in the axial direction, and the stability of puncture by the puncture needle 22 is improved.

Referring to fig. 1, fig. 4b and fig. 4c, in the present embodiment, a plurality of protrusions are disposed at intervals on an outer wall of the first control member 12, and a protruding direction of the protrusions is opposite to an opening direction of the first retaining portion 121. The bulges can increase the friction force between the hand of the doctor and the first control element 12, and the doctor can push the first control element 12 to slide conveniently.

Referring again to fig. 2, 6a and 6b, the first fixing member body 131 is provided with a first connector passage 1311, the proximal end (not shown) of the puncture needle 22 is fixed in the first connector passage 1311, and the lumen of the puncture needle 22 is communicated with the first connector passage 1311.

The puncturing device 1 further comprises a first connecting member 16. The first connector channel 1311 communicates with the interior of the first connector 16 and the puncture needle 22, so that the first liquid medium can be transported into the body via the first connector 16, the first connector channel 1311 and the puncture needle 22 in this order. In this embodiment, the puncture needle 22 communicates with the first connector 16 through the first connector passage 1311 in the first fastener body 131.

In other embodiments, a portion of the puncture needle 22 is housed and fixed in the first fixing member 131, and a portion of the puncture needle 22 that passes through the first fixing member body 131 communicates with the first connecting member 16. I.e., the proximal end of the needle 22 is in direct communication with the first connector 16. The first fluid medium can be introduced directly into the puncture needle 22 via the first connecting element 16, which increases the efficiency of the introduction of the first fluid medium into the puncture needle 22.

The first connecting member 16 includes a first connecting portion 162 and a first switching portion 161 connected to the first connecting portion 162. The first switching portion 161 is disposed outside the handle assembly 10. A proximal end of the first connection portion 162 is connected to the first switch portion 161. The distal end of the first connection portion 162 is connected to the first connector passage 1311, and the first connection portion 162 communicates with the first connector passage 1311.

Specifically, when the first switch portion 161 is normally open, the first liquid medium or the guide wire can be introduced through the first switch portion 161. A first liquid medium or guide wire is moved through the first connector portion 162 into the first connector channel 1311. And then enters the body through the lumen of the puncture needle 22. It is to be understood that the first liquid medium is not limited to being a contrast agent or being saline or the like. The first switch 161 functions to prevent blood from passing therethrough when it is normally closed. In this embodiment, the first switch portion 161 is a three-way valve, and the first connection portion 162 is a hollow tubular structure.

The first fixing body 131 is further provided with a second passage 1312 spaced apart from the first connector passage 1311. That is, there is no communication between the first connector channel 1311 and the second channel 1312. The second passage 1312 has an inner diameter larger than that of the first connector passage 1311. The puncture assembly 20 further comprises a second connector 17. A second connector 17 is also provided on the outside of the handle assembly 10. Part of the second connecting piece 17 is connected to the outer tube 21 by means of a second channel 1312 provided therein.

Referring again to fig. 1, 3 and 5, in the present embodiment, the outer tube 21 can slide relative to the handle assembly 10 in the axial direction. That is, the distal end 21a of the outer tube 21 is slidable in the axial direction away from the handle assembly 10 to convert the puncture assembly 20 from the extended state to the stored state. The distal end 21a of the outer tube 21 is also slidable in a direction toward the handle body 11, so that the puncture needle 22 is switched from the accommodated state to the extended state.

Specifically, referring to fig. 2, the outer tube 23 further includes a second fastener 15 located distal to the first fastener 13. The second fixing member 15 is used to fix the outer tube 21. The second fixing member 15 is accommodated in the accommodating member 113. The second fixing member 15 is spaced apart from the first fixing member 13. The second fixture 15 is located distally of the first fixture 13, i.e. the proximal end of the first fixture 13 is closer to the proximal end of the puncturing device 1 than the second fixture 15 is to the axial direction. The first fixing member 13 is fixedly connected to the proximal end 22b of the puncture needle 22, so that the distal end 22a of the puncture needle 22 is controlled to extend out of the distal end 21a of the outer tube 21 or into the distal end 21a of the outer tube 21 by the first fixing member 13.

Referring to fig. 1, 2 and 7, the handle assembly 10 further includes a second control member 14. The second control member 14 is spaced from the first control member 12. The second control member 14 is connected to the outer tube 21. The second control member 14 is used for controlling the outer tube 21 to slide in the axial direction relative to the puncture needle 22.

In this embodiment, the outer tube 21 can slide relative to the handle body 11, so as to precisely adjust the position of the outer tube 21 in the human body. The second control piece 14 controls the outer tube 21 to slide relative to the handle body 11 in the axial direction, so that the outer tube slides in the direction away from the near end of the handle body 11 and covers the puncture needle 22 again, and the puncture needle 22 is accommodated in the hollow tube body of the outer tube 21, thereby reducing the risk that the puncture needle 22 punctures the inner wall of the human body and improving the safety degree of the operation.

In the present embodiment, the first control member 12 is closer to the proximal end of the puncturing device 1 than the second control member 14. After the first control member 12 controls the puncture needle 22 to be converted from the accommodated state to the extended state and to puncture the interatrial septum, the second control member 14 needs to be controlled to slide in a direction away from the proximal end of the puncture device 1 so as to control the outer tube 21 to cover the puncture needle 22 again. Since the first control member 12 is closer to the proximal end of the puncturing device 1 than the second control member 14, that is, the second control member 14 is farther from the proximal end of the puncturing device 1 than the first control member 12, the second control member 14 is controlled to slide in a direction away from the proximal end of the puncturing device 1, the second control member 14 does not gradually approach the first control member 12, but gradually moves away from the first control member 12, the first control member 12 is not easily touched by mistake in the process of controlling the second control member 14, the puncture needle 22 is prevented from being touched by mistake to change the position of the puncture needle 22 in the human body, the puncture needle 22 is prevented from being touched by the first control member 12 to change the position of the puncture needle 22, and if the first control member 12 is retracted after being touched by mistake, the puncture needle 22 retracts into the outer tube 21, so that the distal end of the puncturing assembly 20 rebounds to the right atrium and cannot enter the left atrium.

With reference to fig. 4a, 4b and 4c, the second control member 14 covers part of the first handle member 111 and part of the second handle member 112. The first handle member 111 and the second handle member 112 are both provided with notches 200. The indentation 200 is formed by a portion of the outer surface of the first handle member 111 or a portion of the outer surface of the second handle member 112 being radially inwardly concave. The second control member 14 is seated on the notch 200. The two opposite side walls of the notch 200 serve to limit the axial travel of the second control member 14.

Referring to fig. 2 and 7, the second control member 14 includes a second retaining portion 141 and a connecting thread 142 spaced apart from the second retaining portion 141. The second catching portion 141 is a groove formed on the inner surface of the second control member 14 and concaved toward the outer surface of the second control member 14. The second catch 141 of the second control member 14 is used for cooperating with the second fixing member 15 to control the axial movement of the second fixing member 15. The second control member 14 is connected with the screw thread 142 for adjusting the deformation and bending of the outer tube 21. In the embodiment, the second retaining portion 141 and the connecting thread 142 are both disposed on the inner surface of the second control member 14, and the connecting thread 142 and the second retaining portion 141 can simultaneously move axially along with the second control member 14. In other embodiments, the connecting threads 142 and the second catch 141 may be provided in different sub-components of the second control member 14, respectively. As long as the connecting screw 142 and the second catch 141 can move in the axial direction in synchronization.

In the present embodiment, the second control member 14 is connected to the proximal end of the outer tube 21, and the second control member 14 is indirectly connected to the proximal end of the outer tube 21. In other embodiments, the second control member 14 may also be directly connected to the proximal end of the outer tube 21.

Referring to fig. 4a, 4b and 4c, in the present embodiment, the handle assembly 10 is provided with a second limiting hole 1113. The second stopper hole 1113 is used to limit the axial stroke of the second control member 14. Specifically, the first handle member 111 of the handle assembly 10 is provided with a second limiting hole 1113. The second hole 1113 and the first hole 1111 are spaced apart. The second stopper hole 1113 extends from the outer wall of the handle body 11 to the receptacle 113 in the handle body 11. Part of the second control member 14 is connected to the proximal end of the outer tube 21 through the first stopper hole 1111. The proximal end of at least a portion of the outer tube 21 is aligned with the second limiting hole 1113. The second handle member 112 is also provided with a second stopper hole 1113. The second limiting hole 1113 of the second handle member 112 is opposite to the second limiting hole 1113 of the first handle member 111.

Referring to fig. 2, the second fixing member 15 includes a second fixing member body 151. The proximal end of the outer tube 21 extends into the second fixing member body 151 and is fixedly connected to the second fixing member body 151.

In this embodiment, the second fixing member 15 further includes a second fixing portion 152 connected to the second fixing member body 151. The second fixing portion 152 is connected to an outer wall of the second fixing body 151. The second fixing portion 152 passes through the second limiting hole 1113 and is connected to the second control member 14. Specifically, with reference to fig. 4b, 4c and 7, the second fixing portion 152 protrudes radially from the outer wall of the second fixing body. The second fixing portion 152 passes through the second limiting hole 1113 and is fastened to the second retaining portion 141 of the second control element 14. In the axial movement process of the second control member 14, the distal end side wall and the proximal end side wall of the second holding portion 141 hold the distal end outer wall and the proximal end outer wall of the second fixing portion 152, and drive the second fixing portion 152 and the second fixing member body 151 to move in the axial direction. In this embodiment, a portion of the second fixing portion 152 is opposite to the second limiting hole 1113.

Referring to fig. 4a, 4b and 4c, in the present embodiment, the second hole 1113 includes a third limiting portion 1113a and a fourth limiting portion 1113b opposite to the third limiting portion 1113 a. The third stopper portion 1113a and the fourth stopper portion 1113b are arranged at intervals in the axial direction. The third stopper portion 1113a and the fourth stopper portion 1113b limit the stroke of the second control member 14 in the axial direction. The third limiting portion 1113a is a distal end of the second limiting hole 1114, and the fourth limiting portion 1113b is a proximal end of the second limiting hole 1113.

On one hand, referring to fig. 3 and fig. 4b, when the second control element 14 slides from the proximal end of the second limiting hole 1113 to the distal end of the second limiting hole 1113, the second control element 14 drives the second fixing portion 152 and the outer tube 21 to slide toward the proximal end 11b away from the handle body 11. The outer tube 21 gradually covers the distal end 22a of the puncture needle 22. When the second fixing portion 152 abuts against the distal end of the second limiting hole 1114, the second fixing portion 152 is limited by the distal end of the second limiting hole 1114, and the second fixing portion 152 and the puncture needle 22 cannot slide in the direction away from the proximal end 11b of the handle body 11. The second fixing portion 152 and the outer tube 21 cannot slide further in a direction away from the proximal end 11b of the handle body 11. This process changes the puncture needle 22 from the extended state to the accommodated state.

On the other hand, referring to fig. 4b and fig. 5, when the second control member 14 slides from the distal end of the second stopper hole 1113 to the proximal end of the second stopper hole 1113, the second control member 14 drives the second fixing portion 152 and the outer tube 21 to slide toward the proximal end 11b of the handle body 11, so that the distal end 22a of the puncture needle 22 gradually exposes out of the outer tube 21. When the second fixing portion 152 abuts against the proximal end of the second limiting hole 1113, the second fixing portion 152 is limited by the proximal end of the second limiting hole 1113, and the second fixing portion 152 and the puncture needle 22 cannot slide in the direction approaching the proximal end of the handle assembly 10. This process changes the puncture needle 22 from the accommodated state to the extended state.

The third limiting portion 1113a and the fourth limiting portion 1113b are two opposite hole walls of the second limiting hole 1113, respectively. The other hole walls of the second limiting hole 1113, the third limiting portion 1113a and the fourth limiting portion 1113b enclose a second limiting hole 1113. The cross-sectional area of the second fixing member 151 is greater than the second limiting hole 1113, so that the second fixing member 151 cannot pass through the second limiting hole 1113, and the second fixing member 151 is not easily separated from the handle body 11.

In this embodiment, the axial travel of the outer tube 21 is greater than or equal to the axial travel of the needle 22. Thus, after the puncture needle 22 punctures the interatrial septum, the outer tube 21 slides towards the direction far away from the proximal end of the handle assembly 10, and the puncture needle 22 can be completely covered again, so that the risk that the puncture needle 22 punctures the inner wall of the human body is reduced, and the safety degree of the operation is improved.

The outer tube 21 is movable by an axial stroke of a distance D2 in the axial direction between the third stopper portion 1113a and the fourth stopper portion 1113b. The movable axial stroke of the puncture needle 22 is a distance D1 in the axial direction between the first stopper 1111a and the second stopper 1111b. Wherein D2 is greater than or equal to D1, so that the movable axial stroke of the outer tube 21 is greater than that of the puncture needle 22, and the outer tube 21 can cover the puncture needle 22 again after the puncture needle 22 extends out of the outer tube 21. The axial travel of the outer tube 21, which is movable, is the same as the axial travel of the second control member 14. The puncture needle 22 can move through the same axial stroke as the first control member 12.

In this embodiment, during the process of sliding the outer tube 21 away from the proximal end 11b of the handle body 11, the puncture needle 22 is kept stationary relative to the proximal end 11b of the handle body 11, so as to ensure that the position of the puncture needle 22 in the human body is kept unchanged, and prevent the puncture needle 22 from moving and easily pricking the left atrial wall.

Referring to fig. 2, fig. 6a, fig. 8a and fig. 8b, the second fixing member 15 has a communicating cavity 1512 communicated with the inner cavity of the outer tube 21, and a puncturing member passage 1511 communicated with the communicating cavity 1512. The puncture needle 22 is inserted into the outer tube 21 through the puncture needle channel 1511 and the communicating chamber 1512. Specifically, the second fastener body 151 includes a spike channel 1511. The proximal end of the outer tube 21 is inserted into the second fixing member body 151. The spike channel 1511 is opposite the first connector channel 1311. The puncture needle 22 passes through the puncture element passage 1511 and is inserted into the outer tube 21.

In this embodiment, the second fixture body 151 further includes a communication chamber 1512 and a second connector passage 1513. Second connector channel 1513 is spaced from piercing member channel 1511 and second connector channel 1513 communicates with communicating chamber 1512. The communication chamber 1512 is in communication with the spike channel 1511. Second connector channel 1513 communicates with piercing member channel 1511 through communication lumen 1512.

Referring to fig. 1, 2 and 6a, the second connecting member 17 can be used for introducing a second liquid medium. The second liquid medium can be delivered into the body through the second connector 17, the second connector channel 1513, the communicating cavity 1512 and the outer tube 21 in sequence. Specifically, the second connector 17 includes a second switch portion 171 and a second connecting portion 172 connected to the second switch portion 171. The second switch 171 is disposed outside the handle body 11. The proximal end of the second connecting member 17 is connected to the second switch portion 171. Part of the second connection portion 172 passes through the second passage 1312. The distal end of the second connecting portion 172 is connected to the second connector passage 1513 and the communicating chamber 1512. When the second switch 171 is in the normally open state, the second liquid medium can be introduced through the second switch 171. The second liquid medium moves to the second connecting member channel 1513, the communicating cavity 1512 and the inner cavity of the outer tube 21 through the second connecting portion 172 and enters the human body. It is to be understood that the second liquid medium is not limited to physiological saline or the like, and is determined according to actual needs.

On the other hand, during the evacuation of the puncture device 1, the first liquid medium flows through the first connector 16, the first connector passage 1311, and the puncture needle 22, and the gas in the first connector 16, the first connector passage 1311, and the puncture needle 22 is evacuated from the puncture device 1. The second liquid medium flows through the second link 17, the second link passage 1513, the communication chamber 1512, and the outer tube 21, and the gas in the second link 17, the second link passage 1513, the communication chamber 1512, and the outer tube 21 is discharged to the outside of the puncture device 1. The present embodiment can effectively exhaust the gas in the puncture device 1 out of the puncture device 1, and avoid the occurrence of air embolism during the operation. It will be appreciated that during venting, the first fluid medium alone flowing through the first connector 16, the first connector passageway 1311 and the piercing needle 22, or the second fluid medium alone flowing through the second connector 17, the communicating chamber 1512 and the outer tube 21, will not completely vent the piercing device 1. This is because the evacuation of the first connector 16, the first connector passage 1311 and the puncture needle 22 is independent of the evacuation of the second connector 17, the second connector passage 1513, the communication chamber 1512 and the outer tube 21.

On the other hand, when the first liquid medium is a contrast solution, the first liquid medium flows out from the distal end 22a of the puncture needle 22, so that the position of the distal end 22a of the puncture needle 22 can be accurately determined, a doctor can conveniently control the puncture interatrial interval of the puncture needle 22, and the accuracy of the puncture operation is improved.

Referring to fig. 6a, 8b and 8c, the proximal end of the second fixing element body 151 is provided with a communication groove 19. The communication groove 19 communicates with the lancet channel 1511. The proximal end of the second fixing member body 151 is also provided with a joint 151c. The junction 151c is spaced from the spike channel 1511. The joint 151c is used to connect with the second connection portion 172. The second connecting portion 172 is inserted into the joint 151c and communicates with the second connecting member passage 1513.

Referring to fig. 6a, 8a and 8c, the handle assembly 10 further includes a sealing member 18. The sealing member 18 is attached and fixed to the proximal end surface of the second fixing member body 151, and seals the opening of the communication groove 19 in the second fixing member body 151, preventing the liquid from flowing through the gap between the communication groove 19 and the sealing member 18. The manner of attaching and fixing the sealing member 18 to the proximal end surface of the second fixing member body 151 is not limited to one or a combination of a plurality of bonding, insertion, and the like.

In the present embodiment, the entire seal 18 has a cubic shape, the seal 18 is provided with an opening 181, the opening 181 penetrates the proximal end surface and the distal end surface of the seal 18, and the opening 181 communicates with the communication groove 19. Piercing needle 22 is connected to piercing member channel 1511 through opening 181. The inner wall of opening 181 is in interference fit with needle 22 to prevent fluid from flowing through the space between needle 22 and opening 181.

The side wall of the partial seal 18 is concave towards the axial direction in which the opening 181 is located. This portion abuts against the side wall of the joint 151c in the second mount body 151, so that the seal member 18 and the second mount body 151 are more compact.

Referring to fig. 9, the spike assembly 20 is bendable. Specifically, the outer tube 21 in the puncture assembly 20 can be bent and deformed. Referring to fig. 2 and 3, the puncturing device 1 further includes a bending adjusting assembly 30. The bend adjustment assembly 30 is connected to the spike assembly 20 and the bend adjustment assembly 30 is also connected to the handle assembly 10. The bend adjustment assembly 30 controls the bending deformation of the spike assembly 20. In the present embodiment, the outer tube 21 is adjusted in shape by the bend adjusting assembly 30. In other embodiments, the outer tube 21 may be pre-deformed, i.e. already in a bent state, before being introduced into the interior of the human body.

Specifically, the bending adjustment assembly 30 includes an adjustment member 31, a bending adjustment member 33, and a pulling member 32 connected between the adjustment member 31 and the bending adjustment member 33. The adjuster 31 is accommodated in the accommodating member 113. The adjusting member 31 is spaced apart from the second fixing member 15 and is disposed on a side of the second fixing member 15 away from the first fixing member 13. The adjusting piece 31 is sleeved on the outer wall of the outer tube 21, and the adjusting piece 31 can slide on the outer wall of the outer tube 21. The bend-adjusting member 33 is disposed within the distal end of the outer tube 21 and is fixed within the distal end of the outer tube 21. The bend 33 falls in a radially inward projection onto the distal end of the puncture needle 22. The proximal end of the pulling member 32 is connected to the adjusting member 31. The distal end of the pulling member 32 is connected to the bend adjuster 33.

The adjusting member 31 is connected to the second control member 14. Referring to fig. 2, 4a, 4b and 4c, at least one of the first handle member 111 and the second handle member 112 is provided with a third position-limiting hole 300. The third hole 300 and the second hole 1113 are spaced apart. The third stopper hole 300 penetrates from the outer wall of the handle body 11 to the receptacle 113 in the handle body 11. Part of the adjusting member 31 protrudes from the third limiting hole 300 and is screwed with the connecting screw 142 in the second control member 14.

The specific process of the second control member 14 adjusting the position of the adjusting member 31 to bend the outer tube 21 is explained as follows. For example, the second control member 14 abuts against the side wall of the notch 200 at the proximal end, the side wall of the notch 200 at the proximal end is used as a support, the side wall rotates relative to the axis of the handle body 11, and the adjusting member 31 slides on the outer wall of the outer tube 21 relative to the handle body 11 along with the rotation of the second control member 14. When the second control member 14 slides the adjusting member 31 toward the proximal end of the outer tube 21, the adjusting member 31 pulls the pulling member 32 and the bending member 33 toward the proximal end of the outer tube 21, so that the distal end of the outer tube 21 is bent toward the proximal end of the outer tube 21. Bending of the outer tube 21 in a direction towards the proximal end of the outer tube 21 also causes the needle 22 to bend in the same direction. In the present embodiment, the bending adjusting member 33 is a hollow ring structure, and the bending adjusting member 33 can be used as a developing point.

In the present embodiment, the outer tube 21 is bendable to facilitate adjustment of the shape of the outer tube 21 in the human body, so that the distal end of the outer tube 21 faces a predetermined position, the puncture needle 22 can accurately puncture the predetermined position, and the accuracy of puncture by the puncture needle 22 is improved.

In the present embodiment, the puncture needle 22 can be bent and deformed. Specifically, the distal end 22a of the needle 22 is provided with a bendable structure 211. Referring to fig. 10, the flexible structure 211 allows the distal end 22a of the puncture needle 22 to be flexibly deformed, thereby facilitating adjustment of the orientation of the distal end face of the puncture needle 22. The bendable structure 211 is directly opposite the distal end of the outer tube 21. When the spike assembly 20 is in the stowed condition, the bendable structure 211 is housed within the distal end of the outer tube 21. It is understood that the bendable structure 211 may be spiral, dovetail, or the like in shape. It will be appreciated that in other embodiments, the bendable structure 211 is not limited in shape, as long as the distal end of the needle 22 is bendable. In this embodiment, the needle 22 is configured to be adjusted by the bending assembly 30. In other embodiments, the needle 22 may be pre-deformed, i.e., bent, prior to insertion into the body.

In this embodiment, the puncture needle 22 has a hollow tubular shape. The end surface of the distal end 22a of the puncture needle 22 is recessed toward the proximal end of the puncture needle 22 to form an inclined puncture surface having a sharp tip angle for facilitating stress concentration and improving puncture efficiency.

Second embodiment

Referring to fig. 11a, 11b, 11c and 12, the puncturing device 1a provided in this embodiment is substantially the same as the puncturing device 1a provided in the first embodiment, except that in this embodiment, the bending adjusting member 33a has elasticity. The bending piece 33a is a hollow tubular knot. The bend-adjusting member 33a is disposed within the distal end 210a of the outer tube 210. The pulling member 31a is connected between an adjusting member (not shown) and the bending member 33 a.

The handle assembly includes a bend adjustment control (not shown), which is used to control and adjust the distal bend of the outer tube 21 (i.e., the second control in the first embodiment, and the manipulation member in the fifth embodiment). The specific structure of the bend-adjusting control member can refer to the second control member in the first embodiment. The bending control member is screwed with the adjusting member, and the bending control member rotates relative to the handle assembly (not shown) to drive the adjusting member and the traction member 31a to slide relative to the handle assembly. Specifically, when the bending control member rotates in a first rotational direction relative to the axial central axis of the handle assembly, the bending control member drives the adjusting member and the pulling member 31a to slide toward the proximal end of the handle assembly, and the bending control member 33a bends toward the proximal end of the handle assembly in the first bending direction, so that the distal end of the outer tube 210 and the distal end of the puncture needle 220 bend toward the proximal end of the handle assembly in the first bending direction. When the bending adjusting control member rotates in a second rotation direction (opposite to the first rotation direction) relative to the axial central axis of the handle assembly, the bending adjusting control member drives the adjusting member and the pulling member 31a to slide in a direction away from the proximal end of the handle assembly, and the bending adjusting member 33a gradually recovers to the original shape, so that the distal end of the outer tube 210 and the distal end of the puncture needle 220 are flush or nearly flush with the axial central axis of the handle assembly. It will be appreciated that the pulling member 31a is formed of a resilient metallic or non-metallic material such as a nickel titanium wire.

In the present embodiment, the distal end 210a of the outer tube 210 includes a main body portion 2101 and a support portion 2102 connected to the main body portion 2101. The support 2102 protrudes along a proximal end facing away from the outer tube 210. The bending piece 33a is fitted over the outer surface of the support 2102. The radially inward projection of the bend adjuster 33a falls on the radially inward projection of the support 2102.

The outer tube 210 is provided with a first through hole 211. The first through hole 211 penetrates the proximal end of the outer tube 210 and the distal end 210a of the outer tube 210. That is, the first through hole 211 penetrates the main body 2101 and the support 2102. The first through hole 211 is for receiving the puncture needle 220.

The outer tube 210 is further provided with an outer tube passage 212, and the outer tube passage 212 is spaced apart from the first through hole 211. External tube channel 212 extends through body portion 2101. An outer pipe passage 212 is provided in the outer pipe 210, and the outer pipe passage 212 extends in the same direction as the first through-holes 211. The distal end of the pulling member 31a extends along the outer tube passage 212 to the bending member 33a through the sidewall of the outer tube 210, and is fixedly connected to the bending member 33 a. In other embodiments, the bending member 33a may be omitted, and in this case, the pulling member 31a is directly fixed to the distal end 210a of the outer tube 210, and the pulling member 31a pulls the distal end 210a of the outer tube 210 to bend. In other embodiments, the pulling member 31a is directly fixed to the distal end 210a of the outer tube 210 and is not connected to the bend-adjusting member 33 a. The pulling member 31a pulls the distal end 210a of the outer tube 210 to bend under the external force, and the bending adjustment member 33a bends along with the outer tube 210. After the external force is removed, the bending member 33a returns to its original shape, and the elastic force of the bending member 33a returning to its original shape also causes the outer tube 210 to have its original shape.

In this embodiment, the handle assembly further includes a spacer 19a, the spacer 19a having a hollow tubular structure. The spacer 19a is provided on the outer wall of the bend adjuster 33 a. The spacer 19a is formed of a polymer material. The partition 19a accommodates a part of the pulling member 31a therein. The distal end of the pulling element 31a passes through the lumen of the spacer 19a and is fixedly attached to the support 2102.

In this embodiment, the distal end 210a of the outer tube 210 further comprises a covering portion 2103. The covering portion 2103 covers the spacer 19a, and the covering portion 2103 covers a portion of the supporting portion 2102 which is exposed from the main body portion 2101. The proximal end of the covering portion 2103 is flush with the distal end of the main body portion 2101, so that the outer tube 210 is prevented from being withdrawn from the human body due to the height difference between the covering portion 2103 and the main body portion 2101.

The covering portion 2103 also covers the outer wall of the bending adjusting piece 33a, so that the bending adjusting piece 33a is stably housed in the outer tube 210, and the bending adjusting piece 33a is prevented from falling out of the outer tube 210.

In this embodiment, the spacer 19a separates the pulling element 31a from the covering portion 2103, and the portion of the pulling element 31a in the inner cavity of the spacer 19a can move relative to the spacer 19a, so that the portion of the pulling element 31a covered by the covering portion 2103 can be prevented from being held and limited by the covering portion 2103 and being unable to slide relative to the spacer 19a, and the supporting portion 2102 can not be bent.

In this embodiment, the material of the covering portion 2103 is a polymer material, as in the case of the main body 2101. The cover portion 2103 is fusible with the main body portion 2101 in a molten state. In other embodiments, the material from which the cover portion 2103 is made may be different from the material from which the body portion 2101 is made.

In this embodiment, the melting point of the covering portion 2103 is lower than that of the spacer 19 a. The spacer 19a is not melted during the fusion of the covering portion 2103 and the main body 2102 in the molten state, thereby preventing the molten covering portion 2103 from completely fixing the pull wires 31a in the spacer 19a and the spacer 19a as a whole. Preferably, in this embodiment, the proximal end of the spacer 19a is farther from the distal end of the outer tube 210 than the proximal end of the bend-adjusting member 33a, so that the covering portion 2103 is prevented from covering the proximal end face of the spacer 19a, and the melted covering portion 2103 is more effectively prevented from completely fixing the pull wire 31a in the spacer 19a and the spacer 19a into a whole.

In this embodiment, the distal end of the retractor 31a passes through the distal end of the spacer 19a and is covered and secured by the cover 2013. When pulling member 31a, pulling member 31a can slide within spacer 19a toward the proximal end of the handle assembly, and the distal end of pulling member 31a pulls cover 2103, causing bending member 33a and support 2102 to bend toward the proximal end of the handle assembly. In other embodiments, the distal end of the pulling element 31a is fixedly connected to the bend-adjusting element 33a after passing through the spacer 19 a. When the pulling member 31a is pulled, the distal end of the pulling member 31a pulls the bending member 33a, so that the bending member 33a and the supporting portion 2102 are bent toward the proximal end of the handle assembly.

Referring to fig. 12, the outer wall of the bending member 33a has a plurality of elastic portions 330a and a plurality of openings 330b. Each opening portion 330b is connected between two adjacent elastic portions 330 a. The opening 330b is a groove structure formed on the bending adjusting member 33 a. The opening 330b reduces the rigidity of the bending adjuster 33a, and makes the bending adjuster 33a more easily bent.

Further, when the second control member drives the adjusting member 31a to slide toward the proximal end of the outer tube 210, the adjacent elastic portions 330a approach each other, and the opening 330b between the adjacent two elastic portions 330a gradually shrinks, so that the bending member 33a is deformed and bent as a whole.

In this embodiment, the number of the openings 330b per unit length is gradually increased from the proximal end 331 of the bending member to the distal end 332 of the bending member. The stiffness of the bend-adjusting member 33a decreases from the bend-adjusting member proximal end 331 to the bend-adjusting member distal end 332. Bend-adjusting member 33a is more easily bent in the direction from bend-adjusting member proximal end 331 to bend-adjusting member distal end 332. In other embodiments, the number of openings 330b per unit length remains constant from the proximal end 331 of the bend control member to the distal end 332 of the bend control member. 1

Third embodiment

Referring to fig. 13, the puncturing device 1b of the present embodiment is substantially the same as the puncturing device of the second embodiment, except that a plurality of openings 340b are connected and extend spirally along the outer wall of the bending adjusting member 330 to form a whole.

The pitch of the adjacent two opening portions 340b gradually decreases from the proximal end 3301 of the bending member to the distal end 3302 of the bending member. The bending-adjusting member 330 has a stiffness that gradually decreases from the proximal end 3301 to the distal end 3302 of the bending-adjusting member, and the bending-adjusting member 330 is more easily bent from the proximal end 3301 to the distal end 3302 thereof. In other embodiments, the pitch of the opening 340b remains constant from the proximal end 3301 to the distal end 3302 of the bending member 330.

Fourth embodiment

The puncture device 1c provided in the present embodiment is substantially the same as the second embodiment, wherein the components of the bending adjustment assembly, the second control member, the adjustment assembly, and the like are substantially the same as those of the bending adjustment assembly, the second control member, the adjustment assembly, and the like in the second embodiment; the process of adjusting the distal bend of the piercing member is also substantially the same as in the second embodiment and will not be described further herein. In this embodiment, different from the second embodiment, the components such as the first control member, the first fixing member, and the second fixing member are described in detail below.

Referring to fig. 14-19, the lancing device 1c includes a handle assembly 10c and a lancing assembly 20c housed in the handle assembly 10c and fixedly connected to the handle assembly 10c. The spike assembly 20c includes a spike 22c. The handle assembly 10c also includes a first control member 12c for controlling the needle 22c. When the first control member 12c is rotated, the first control member 12c controls the penetrating needle 22c to approach or separate from the handle assembly 10c. The first control part 12c controls the puncture needle 22c to be close to or far away from the handle assembly 10c, so that the first control part 12c controls the puncture needle 22c to penetrate out of the handle assembly 10c or extend into the handle assembly 10c, the operation is easy, and the puncture needle 22c is controlled to perform puncture operation. Can avoid the puncture needle 22c from continuing to puncture the human body after the puncture is successful because of inertia in the traditional puncture operation process.

Referring to fig. 14 to 17, the first control member 12c is connected to the proximal end portion 221c of the puncture needle 22c. And the proximal end portion 221c of the puncture needle 22c is housed in the first control member 12c. When the first control member 12c is rotated, the proximal end portion 221c accommodated in the first control member 12c is controlled to be close to or away from the handle assembly 10c, so that the puncturing member 12c is close to or away from the handle assembly 10c.

The first control member 12c is threadably connected to the handle body 11c. The first control member 12c is fitted over the handle body 11c. The proximal end portion 221c of the puncture needle 22c is housed in the handle body 11c, and the proximal end portion 221c is connected to the first control member 12c. The first control member 12c has a first screw portion 122c formed on an inner surface thereof. In fig. 19, the first control member 12c is further provided with a first catch 121c on the inner surface. The first threaded portion 122c is provided on the distal end side of the first catch 121c. The outer surface in the handle body 11c is provided with a second threaded portion 1114c. The second screw thread portion 1114c is provided at the distal end side of the first stopper hole 1111c. In the present embodiment, the handle body 11c includes a first handle member 111c. The second screw portions 1114c are respectively provided on the outer surfaces of the first handle members 111c to be screw-coupled with the first screw portions 122c.

In the present embodiment, the steps of operating the first control member 12c and the puncture needle 22c are as follows. First, the first control member 12c is pushed by a pushing force parallel to the axial direction and away from the proximal end of the handle body 11c, so that the first control member 12c drives the first fixing member 13c and the puncture needle 22c connected to the first fixing member 13c to slide away from the proximal end of the handle body 11c, and the puncture needle 22c extends out of the outer tube 21c. After the first threaded portion 122c in the first control member 12c abuts against the second threaded portion 1114c, the pushing force parallel to the axial direction and toward the distal end of the handle body 11c cannot make the first control member 12c slide further. And a rotating force is applied to the first control part 12c, so that the first control part 12c rotates around the handle body 11c in the circumferential direction, and the first threaded part 122c in the first control part 12c is matched with the second threaded part 1114c. While the first control piece 12c axially rotates around the handle body 11c, the first control piece 12c continues to slide towards the distal end of the handle body 11c, and drives the first fixing piece 13c and the puncture needle 22c connected to the first fixing piece 13c to smoothly slide away from the proximal end of the handle body 11c, and the puncture needle 22c punctures the fossa ovalis.

Referring to fig. 14 to 17, during the puncturing operation, the puncturing needle 22c can be rapidly protruded out of the outer tube 21c by pushing the first control member 12c. Then, by rotating the first control part 12c, the torque for rotating the first control part 12c is converted into the puncture acting force of the puncture needle 22c, so that the puncture needle 22c can puncture the fossa ovalis conveniently, the puncture process of the puncture needle 22c is more stable, the displacement and the deviation from the target position are not easy to occur, and the accuracy of puncture of the puncture needle 22c is improved; after the puncture needle 22c successfully punctures, the puncture needle is not easy to continue to puncture forwards under the inertia effect, so that the puncture needle 22c is prevented from puncturing the left atrium wall, and the safety degree of the puncture operation performed by the puncture needle 22c is improved.

Referring to fig. 17 and 18, a first limiting hole 1111c is disposed on the handle body 11c. The first limit hole 1111c is used for limiting the stroke of the first control member 12c in the axial direction. The axial distance between the first thread part 122c and the second thread part 1114c is smaller than the axial length of the first limiting hole 1111c, so that after the first control member 12c controls the puncture needle 22c to slide a preset distance in the axial direction towards the proximal end away from the handle body 11c, the first thread part 111c can contact the second thread part 1114c, and the first thread part 122c is connected with the second thread part 1114c.

The first handle member 111c in this embodiment is substantially the same as that in the second embodiment, and will not be described herein. In contrast, in the present embodiment, the first handle member 111c is provided with a limiting portion 110c. The limiting portion 110c protrudes from the surface of the first handle member 111c in a direction away from the axial direction. After the second control member 14c moves toward the proximal end of the handle body 11c in the axial direction by a predetermined distance, the proximal end of the second control member 14c abuts against the limiting portion 110c and cannot move any further.

In this embodiment, the first handle member 111c comprises two sub-first handle members (not shown) that are bolted together to facilitate assembly and disassembly of the first handle member 111c.

In other embodiments, the first threaded portion 122c may be disposed at a proximal side of the first catch 121c. The first control member 12c rotates circumferentially around the handle body 11c, and drives the first fixing member 13c and the puncture needle 22c connected to the first fixing member 13c to move axially. The first control member 12c continues to move toward or away from the handle assembly 10c in the axial direction, bringing the penetrating needle 22c toward or away from the handle assembly 10c.

In other embodiments, the first control member 12c may be provided with only the first threaded portion 122c on the inner surface thereof, and the first threaded portion 122c is threadedly coupled to the outer wall of the handle body 11c. The first control member 12c rotates circumferentially around the handle body 11c, and drives the first fixing member 13c and the puncture needle 22c connected to the first fixing member 13c to move in the axial direction.

In other embodiments, the inner surface of the first control member 12c may be provided with only the first catch 121c, and the first catch 121c is engaged with the first fixing member 13 c. The first control member 12c moves toward or away from the handle assembly 10c in the axial direction, and drives the first holding portion 121c, the first fixing member 13c, and the puncture needle 22c connected to the first fixing member 13c toward or away from the handle assembly 10c.

In other embodiments, the puncture needle 22c may be integrally formed with the first fixing member 13c, and the first control member 12c is connected to the puncture needle 22c and the first fixing member 13 c. The partial puncture needle 22c penetrates through the handle body 11c and is engaged with the first engaging portion 121c. The first control element 12c can bring the puncture needle 22c into axial movement.

In other embodiments, the spike assembly 20c may include only a spike 22c. The puncture device 1c is delivered to a designated site of the human body through the delivery sheath. The first control member 12c, the penetrating needle 22c, moves relative to the handle assembly 11c, out of the delivery sheath or into the delivery sheath of the delivery device.

Referring to fig. 15, 16 and 17, the first fixing element body 131c of the first fixing element 13c is provided with a first through passage 100, and the first through passage 100 axially penetrates through the distal end of the first fixing element body 131c and the proximal end of the first fixing element body 131 c.

The second fixing piece body 151c in the second fixing piece 15c is provided with a second passage 200. The second passage 200 extends through the distal end of the second fastener body 151c and the proximal end of the second fastener body 151c in the axial direction. In the present embodiment, the first passage 100 is disposed opposite to the second passage 200. The proximal end of the outer tube 21c is fixed to the distal end of the second fixing member body 151c, and the proximal end of the outer tube 21c extends into the second passage 200 to communicate with the second passage 200.

In this embodiment, the spike assembly 20c further includes a seal 18c. The sealing member 18c seals the proximal end of the second fixture body 151c. That is, the seal 18c seals the proximal side of the second passage 200. Gas or liquid is prevented from flowing out of the second fixture body 151c from the opening of the proximal end of the second fixture body 151c.

The spike assembly 20c further includes a connector 101c. The connecting member 101c has a hollow tubular structure. The proximal end of the connecting member 101c extends into the first passage 100 and is fixed to the distal end of the first fixing member body 131 c. The proximal end of the connector 101c may be adhesively secured to the distal end of the first fastener body 131c, with the adhesive material filling the gap between the outer wall of the connector 101c and the inner wall of the first passage 100, preventing gas or liquid from flowing out of the first fastener body 131c between the outer wall of the connector 101c and the inner wall of the first passage 100.

The distal end of the connector 101c extends through the seal member 18c and into the second passage 200, communicating with the second passage 200. The connector 101c communicates the first passage 100 with the second passage 200. The connector 101c is slidably connected within the second channel 200. The distal end of the connecting member 101c is slidable with the sliding of the first fixing member 13 c. The process of sliding the connecting member 101c in the second channel 200 will not be separated from the second channel 200, and the first channel 100, the connecting member 101c and the second channel 200 are ensured to be communicated.

Piercing needle 22c passes through first channel 100 and second channel 200. The proximal end of the piercing needle 22c extends into the first passage 100 and is fixed within the proximal end of the first fastener body 131 c. The piercing needle 22c extends through the lumen of the connector 101c, in the second passage 200 and into the lumen of the outer tube 21c.

Referring to fig. 15 to 17, in the present embodiment, the proximal end of the first fixing member body 131c includes a first inlet 1313 and a second inlet 1314 spaced from the first inlet 1313. The second inlet 1314 communicates with the lumen of the needle 22c. The first inlet 1313 communicates with the first passage 100.

During the process of exhausting the puncture device 1c, the first liquid medium flows in from the first inlet 1313, flows through the first passage 100, the connecting member 101c, and the second passage 200, enters the outer tube 21c, and is discharged out of the puncture device 1c from the distal end of the outer tube 21c, and the gas in the outer tube 21c is discharged by the portion of the first liquid medium.

The second liquid medium flows in from the second inlet 1314, flows through the puncture needle 22c, and is discharged out of the puncture device 1c through the distal end of the puncture needle 22c, discharging the gas in the puncture needle 22c. The present embodiment can effectively discharge the gas of the puncture needle 22c, the gas of the outer tube 21c, the gas of the first fixing member 13c, and the gas of the second fixing member 15c in the puncture device 1c out of the puncture device 1c, and avoid the occurrence of air embolism during the operation. During the contrast procedure, contrast media flows in from second inlet 1314 and is expelled out of lancing device 1c through the distal end of lancet 22. The contrast agent is discharged from the distal end of the puncture needle 22, so that the position of the distal end of the puncture needle 22 can be conveniently obtained, a doctor can conveniently perform puncture surgery, and the accuracy of the surgery is improved.

In other embodiments, the proximal end of the first fastener body 131c may include only the first inlet 1313. The first inlet 1313 communicates with the lumen of the piercing needle 22c and the first inlet 1313 communicates with the first passage 100. The first fluid medium flows in from the first inlet 1313, and a part of the first fluid medium enters the inner cavity of the puncture needle 22c, and the part of the first fluid medium flows through the puncture needle 22c and is discharged out of the puncture device 1c through the distal end of the puncture needle 22c, so that the gas in the puncture needle 22c is discharged; another part of the first liquid medium enters the first passage 100, and the part of the first liquid medium flows through the connecting member 101c, the second passage 200, and the outer tube 21c and is discharged to the outside of the puncture device 1c, and the part of the first liquid medium discharges the gas in the outer tube 21c. The gas in the puncture needle 22c and the gas in the outer tube 21c can be simultaneously discharged by injecting the first liquid medium into the puncture device 1c, and the efficiency of the air discharge of the puncture device 1c can be improved.

Referring to fig. 14, 17, 18 and 20, in the present embodiment, the handle assembly 1c further includes a mis-contact prevention piece 40c. The erroneous contact preventing piece 40c includes an erroneous contact preventing body 41c, and a grip portion 42c connected to the erroneous contact preventing body 41 c. The erroneous-touch preventing body 41c includes a sleeve shape having an opening. The erroneous-touch preventing body 41c and the grip portion 42c are integrally formed, and the grip portion 42c extends in a direction away from the opening of the erroneous-touch preventing body 41 c. In other embodiments, the anti-touch body 41c and the grip portion 42c may be separate components and then fixedly connected together by other elements. In this embodiment, the erroneous contact 40c is detachably connected to the handle assembly 10c. The erroneous contact prevention piece 40c is for preventing the second control member 14c from moving distally of the handle body 11c in the event of being erroneously operated. The erroneous operation means that the second control member 14c is touched or operated without adjusting the outer tube 21c by operating the second control member 14c; or touching or manipulating the first control member 12c without adjusting the penetrating needle 22c by operating the first control member 12c. When the erroneous contact preventing member 40c is connected to the handle body 11c and the erroneous contact preventing body 41c is fitted to the outer wall of the handle body 11c, the proximal end face of the erroneous contact preventing body 41c is adjacent to the distal end face of the second control member 14c. When the distal end face of the second control member 14c abuts against the proximal end face of the erroneous contact preventing member 40c, the second control member 14 cannot axially slide along the proximal end of the handle body 11c away from the handle body 11c, so that the situation that the outer tube 21c covers the puncture needle 22c in advance by erroneously touching the second control member 14c during the puncture of the puncture needle 22c is avoided. When the anti-misoperation contact 40c is detached from the handle body 11c, the second control member 14c can slide away from the proximal end of the handle body 11c in the axial direction after having no limit function of the anti-misoperation contact 40c in the axial direction, so that the outer tube 21c also slides away from the proximal end of the handle body 11c, and the outer tube 21c can cover the puncture needle 22c again.

In other embodiments, the handle assembly 1c may not include the anti-misoperation part 40c, and the second control part 14 is supported by other parts and is not easy to slide after the second control part 14 is touched by mistake, so that the purpose of preventing misoperation of the present invention can be achieved.

Fifth embodiment

Referring to fig. 21 to 22, the puncturing device 1d of the present embodiment is substantially the same as the puncturing device of the fourth embodiment in that the second controlling member 14d of the puncturing device 1d can control the distal end of the outer tube 21d to bend and deform, and the second controlling member 14d can also control the outer tube 21d to move axially relative to the handle body 11d. In this embodiment, the components of the first control part 12d, the second control part 14d, the outer tube 21d, and the like are substantially the same as the components of the first control part 12c, the second control part 14c, the outer tube 21c, and the like in the fourth embodiment, and are not repeated herein. In this embodiment, the operation control member and the second control member 14d refer to the same member. In the present embodiment, the most important difference from the fourth embodiment is that the error preventing contact 40d is different from the error preventing contact 40c, and the detailed description is given below.

The erroneous contact prevention member 40d includes a support block 41d, a stopper 42d, and an elastic portion 43d connected between the support block 41d and the stopper 42d. The second control member 14d is opened with an accommodating portion 140. In the present embodiment, the receiving portion 140 is an elastic portion receiving hole 140 penetrating through the inner and outer surfaces of the second control member 14 d. The supporting block 41d is fixed to a sidewall of the elastic part receiving hole 140 near the outer surface of the second control member 14 d. The elastic portion 43d is received in the elastic portion receiving hole 140. The stopper 42d is at least partially received in the elastic portion receiving hole 140, and the stopper 42d is closer to the handle body 11d than the elastic portion 43d. The inner diameter of the elastic portion receiving hole 140 is smaller than the outer diameter of the elastic portion 43d, so that the stopper 42d is partially exposed from the elastic portion receiving hole 140 and is not separated from the elastic portion receiving hole 140. A part of the outer surface of the handle body 11d is provided with an annular stopper receiving groove 110d, and the annular stopper receiving groove 110d surrounds the axial center axis of the handle body 11 f. The stopper receiving groove 110d may receive a part of the stopper 42d. The elastic portion 43d is supported by the supporting block 41d, and applies its own elastic force to the blocking portion 42d, so that the blocking portion 42d abuts against the groove wall of the blocking portion accommodating groove 110d. The blocking portion receiving groove 110d cooperates with the blocking portion 42d to limit the second control member 14d from moving in the axial direction. When the second control member 14d is operated by mistake and the stopping portion 42d cannot be separated from the stopping portion receiving groove 110d by the acting force of the mistake operation, the stopping portion 42d can stop the second control member 14d from moving relative to the handle body 11d in the axial direction, so that the outer tube 21d cannot move relative to the handle body 11d. When the force of pushing the second control member 14d retracts the blocking portion 42d into the elastic portion receiving hole 140, the blocking portion 42d is separated from the blocking portion receiving groove 110d, and the blocking portion 42d cannot be engaged with the blocking portion receiving groove 110d, so that the second control member 14d cannot be restricted from moving in the axial direction. In this embodiment, the blocking portion 42d moves away from the supporting block 41d under the elastic force of the elastic portion 43d to abut against the groove wall of the blocking portion accommodating groove 110d. In other embodiments, the elastic portion 43d exerts a pulling force on the blocking portion 42, and the gravity of the blocking portion 42d is greater than the pulling force of the elastic portion 43d and abuts against the groove wall of the blocking portion accommodating groove 110d. When the acting force of pushing the second control member 14d and the pulling force of the elastic portion 43d act on the blocking portion 42d together, so that the blocking portion 42d is separated from the blocking portion accommodating groove 110d, the blocking portion 42d cannot block the second control member 14d from moving in the axial direction. The force pushing the second operating member 14d can be reduced by the tensile force of the elastic portion 43d.

In the present embodiment, the engagement of the erroneous contact 40d with the handle body 11d has the following advantageous effects. On the one hand, in the process that the first control part 12d controls the puncture needle 22d to move out of the outer tube 21d, the second control part 14d is prevented from being touched by mistake, so that the outer tube 21d covers the puncture needle 22d in advance, and the puncture needle 22d punctures. On the other hand, in the process of rotating the second control member 14d to adjust and deform the distal end of the outer tube 21d, the second control member 14d is prevented from being touched by mistake to drive the outer tube 21d to move in the direction away from the proximal end of the handle body 11d, so that the outer tube 21d moves in the direction away from the proximal end of the handle body 11d in advance, the distance between the distal end surface of the outer tube 21d and the distal end surface of the puncture needle 22d is increased, and the situation that the puncture needle 22d cannot extend out of the outer tube 21d along the direction away from the proximal end of the handle body or the length of the outer tube 21d extending out is too short under the control of the first control member 12d is avoided, so that the puncture needle 22d is affected in puncturing.

In the present embodiment, the second control member 14d can control the outer tube 21d to move in the axial direction, and can also control the deformation of the distal end of the outer tube 21 d. In other embodiments, the second control member 14d may control only the axial movement of the outer tube 21d, or may control only the distal deformation of the outer tube 21 d.

In the present embodiment, the elastic portion accommodating hole 140 of the second control member 14d is provided at the distal end portion thereof. In other embodiments, the elastic portion receiving hole 140 may be disposed at other positions, such as the proximal end portion, and the like, based on that the elastic portion receiving hole 140 can receive a portion of the erroneous operation preventing contact 40d.

In the present embodiment, as shown in fig. 21, the handle assembly 10d further includes a false touch preventing member 50d, and the structure of the false touch preventing member 50d is substantially the same as that of the false touch preventing member 40d. The false touch preventing member 50d is housed in the first controller 12d. The anti-collision piece 50d is engaged with the handle body 11d to block the first control member 12d from moving in the axial direction, and the anti-collision piece 50d is used for preventing the puncture needle 22d from moving relative to the handle body 11d when the first control member 12 is touched by mistake. In combination with the puncture surgery process, the specific beneficial effects are as follows. During transportation of the puncture device 1d to a target site, or during rotation of the second control member 14d to bend the distal end of the outer tube 21d toward a site to be punctured (e.g., fossa ovalis, etc.), the erroneous touch prevention member 50d restricts axial movement of the first control member 12, thereby preventing erroneous touch of the first control member 12 and causing the puncture needle 22d to protrude out of the outer tube 21d in advance to puncture a patient.

In other embodiments, the erroneous touch preventing piece 50d may be omitted, and only the erroneous touch preventing piece 40d is provided.

In other embodiments, the blocking effect of the anti-misoperation contact 40d in the second control part 14d is greater than the blocking effect of the anti-misoperation contact 50d in the first control part 12d (for example, the elastic part 43d in the anti-misoperation contact 40d makes the blocking part 42d abut against the elastic force of the blocking part accommodating groove 110d, and is greater than the elastic part in the anti-misoperation contact 50d makes the blocking part abut against the elastic force of the blocking part accommodating groove 110 d), so that the risk of moving the outer tube 21d due to the mistaken contact on the second control part 14d can be further reduced, and simultaneously, on the basis of realizing the anti-misoperation on the first control part 12d, the blocking effect of the axial movement of the first control part 12d is reduced, so as to facilitate pushing the first control part 12d to control the movement of the puncture needle 22 d.

In other embodiments, the second control member 14d is provided with a plurality of elastic portion receiving holes 140 arranged at intervals. The number of the erroneous contacts 40d is the same as the number of the spring receiving holes 140, and the erroneous contacts are received in the respective spring receiving holes 140. The plurality of erroneous-touch preventing pieces 40d can increase the erroneous-touch preventing effect of the second control piece 40d. In other embodiments, the plurality of error preventing contacts 40d include a pair of opposite error preventing contacts 40d which are symmetrical with respect to the central axis of the puncture device 1d. This arrangement makes it possible to distribute the restricting action of the plurality of erroneous contacts 40d on the second control member 14d symmetrically and uniformly.

In other embodiments, the receiving portion 140 may be a portion of the inner surface of the second control member 14d that is concave outward to form the elastic portion receiving groove 140. The number of the spring receiving grooves 140 is one or more, and is the same as the number of the erroneous contacts 40d. The elastic portion 43d is accommodated in the elastic portion accommodating groove 140, and the partial stopper 42d is accommodated in the elastic portion accommodating groove 140. The elastic portion 43d is connected between the bottom wall of the elastic portion accommodating groove 140 and the stopper portion 42d.

In other embodiments, the receiving portion 140 may form an annular groove 140 for a portion of the inner surface of the second control member 14d to be outwardly concave. The annular groove 140 is formed concavely in a part of the inner surface of the second control member 14 d. One or more error preventing contacts 40d are spaced apart on the annular groove 140. The supporting block 41d is fixed to a groove wall of the annular groove 140, the elastic portion 43d is received in the annular groove 140, and a part of the stopper 42d is received in the annular groove 140. The elastic portion 43d is connected between the bottom wall of the annular groove 140 and the stopper portion 42d.

In other embodiments, the erroneous-contact preventing member 40d may include only the elastic portion 43d and the blocking portion 42d, so that the erroneous-contact preventing member 40d can perform the limit function.

In other embodiments, the handle body 11d may not include the stopper receiving groove 110d. The blocking portion 42d abuts against the outer wall of the handle body under the action of the elastic portion 43d, and the friction force between the blocking portion 42d and the handle body limits the movement of the second control member 14 d.

In other embodiments, the erroneous contact preventing piece 40d has a hollow tubular shape as shown in fig. 23. The erroneous contact 40d has elasticity. The material of the erroneous contact prevention piece 40d may be silicone rubber. A part of the inner surface of the second control member 14d is outwardly concaved to form a ring-shaped receiving groove 141. The erroneous contact 40d is fixed to the accommodation groove 141. Part of the anti-misoperation part 40d is exposed out of the accommodating groove 141 and abuts against the outer wall of the handle body 11d. In the process of the axial movement of the second control member 14d, friction force exists between the erroneous contact preventing member 40d and the handle body 11d, and the friction force hinders the second control member 14d from moving. When the acting force of the mistaken touch on the second control member 14d is smaller than the static friction force between the mistaken touch preventing member 40d and the handle body 11d, the second control member 14d is kept static. When the acting force acting on the second control member 14d causes the second control member 14d to move, the friction force between the erroneous contact preventing member 40d and the handle body 11d plays a role in buffering the movement of the second control member 14d, so as to prevent the second control member 14d from moving too fast and prevent the outer tube 21d controlled by the second control member 14d from moving too fast.

In other embodiments, the outer tube 21d may be integrally formed with the second fixing member 15d and the second control member 14d to form an outer tube (not shown). The erroneous contact 40d is connected to the second control member 14 d. The anti-tamper contact 40d restricts movement of the unitary outer tube.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (13)

1. The utility model provides a puncture device, its characterized in that, puncture device includes handle components and puncture components, puncture components accept in the handle components, and with handle components is fixed continuous, puncture components includes the puncture piece, handle components still includes and is used for control the first control of puncture piece, works as when first control rotates, first control the puncture piece is close to or keeps away from handle components.

2. The lancing device of claim 1, wherein the first control member is coupled to the lancet proximal portion and the lancet proximal portion is received within the first control member.

3. The lancing device of claim 2, wherein an inner surface of the first control member defines a first catch that grips the lancet, the first catch moving the lancet relative to the handle assembly when the first catch is moved axially relative to the proximal end of the handle assembly.

4. The lancing device of claim 2, wherein the first control member has a first threaded portion on an inner surface thereof, the handle assembly includes a handle body, the first control member is disposed on the handle body, and the proximal end portion of the lancing member is received in the handle body and coupled to the first control member, such that rotation of the first control member about the handle body moves the lancing member relative to the handle body.

5. The lancing device of claim 4, wherein the first control element further comprises a first retaining portion on an inner surface thereof, the first threaded portion is disposed on a distal side of the first retaining portion, the outer wall of the handle body comprises a second threaded portion cooperating with the first threaded portion, and a portion of the lancing device extends through the handle body and is engaged with the first retaining portion.

6. The lancing device of claim 5, wherein after the first catch moves the lancet a predetermined distance axially away from the proximal end of the handle assembly, the first control member rotates to move the lancet further away from the proximal end of the handle assembly.

7. The puncturing device as claimed in claim 5, wherein the handle body has a first position-limiting hole, a portion of the puncturing element passes through the first position-limiting hole and is engaged with the first retaining portion, and an axial distance between a distal end of the first threaded portion and a distal end of the second threaded portion is smaller than an axial length of the first position-limiting hole.

8. The lancing device of claim 1, wherein the lancing element comprises a puncture needle and a first securing element coupled to a proximal end of the puncture needle, and the lancing assembly further comprises an external element comprising an outer tube and a second securing element coupled to a proximal end of the outer tube, the second securing element being distal to the second securing element.

9. The lancing device of claim 8, wherein the lancing assembly further comprises a connector having a hollow tubular shape, the first mounting member defines a first channel, the second mounting member defines a second channel, and the connector communicates with both the interior of the first channel and the interior of the second channel such that the first liquid medium can be delivered into the body sequentially through the first channel, the connector, the second channel, and the outer tube.

10. The lancing device of claim 9, wherein the proximal end of the connector is secured within the first channel and the distal end of the connector is slidably coupled within the second channel.

11. The lancing device of claim 9, wherein the lancing assembly further comprises a seal that seals a proximal side of the second channel.

12. The lancing device of claim 4, wherein the handle assembly further comprises a second control member spaced from the first control member, the second control member coupled to the outer tube, the second control member controlling the sliding movement of the outer tube relative to the lancing member.

13. The lancing device of claim 12, wherein the handle assembly further comprises a stop member detachably connected to the handle assembly, and when the stop member is fitted over the outer wall of the handle assembly, the stop member abuts against the distal end of the second control member to limit the second control member from driving the outer tube member to move axially away from the proximal end of the handle assembly.

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