Puncture device

Abstract

A puncture device provided by the present invention includes a puncture needle, a catheter, a suction head, and a puncture driving assembly. One end of the catheter is connected to the suction head, and the other end is connected to the puncture driving assembly. One end of the puncture needle passes through the catheter and extends to the suction head, and the other end is connected to the puncture driving assembly. The puncture driving assembly includes a cylinder body, a push rod member, and a positioning unit. An abutting portion extending outward is provided at the edge of one end of the cylinder body. The puncture needle extends into the cylinder body from the other end of the cylinder body. The push rod member can be movably extended into the cylinder body and connected to the puncture needle. The positioning unit is movably arranged along the axial direction of the push rod member and can be fixed to the push rod member. The operator pushes the push rod member, and the push rod member moves in the cylinder body. When the positioning unit cooperates with the abutting portion on the cylinder body, the push rod member stops moving in the cylinder body, thereby controlling the puncture depth of the puncture needle, ensuring the puncture accuracy rate, and improving the puncture efficiency.

Description

Technical Field

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

[0002] Puncture devices are commonly used as instruments for organ puncture, drug or biomaterial injection, and body fluid aspiration. A puncture device generally includes a puncture needle and a driving mechanism. The driving mechanism is connected to the puncture needle and drives the puncture needle to puncture.

[0003] In actual operation, when a puncture device punctures the human body, there are relatively high requirements for the controllability of the puncture depth. Due to manual operation, it is relatively difficult to grasp the puncture depth, resulting in low efficiency and high error rates. Summary of the Invention

[0004] Based on this, it is necessary to provide a puncture device that is convenient for adjustment and operation in view of the above technical problems.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A puncture device includes a puncture needle, a catheter, a suction head, and a puncture driving assembly. One end of the catheter is connected to the suction head, and the other end is connected to the puncture driving assembly. One end of the puncture needle passes through the catheter to reach the suction head, and the other end is connected to the puncture driving assembly. The puncture driving assembly drives the puncture needle to puncture; the puncture driving assembly includes a cylinder body, a push rod member, and a positioning unit. An outwardly extending abutting portion is provided at the edge of one end of the cylinder body. The puncture needle extends into the cylinder body from the other end of the cylinder body. The push rod member is movably inserted into the cylinder body from the end of the cylinder body having the abutting portion and is connected to the puncture needle. The positioning unit is movably provided along the axial direction of the push rod member and can be fixed to the push rod member. The positioning unit is in contact and cooperation with the abutting portion to position the puncture needle.

[0007] The advantage of the present invention is that the positioning unit is fixed at a predetermined position of the push rod member. The operator pushes the push rod member, and the push rod member moves in the cylinder body. When the positioning unit and the abutting portion on the cylinder body cooperate with each other, the push rod member stops moving in the cylinder body, thereby controlling the puncture depth of the puncture needle, ensuring the puncture accuracy, and improving the puncture efficiency.

[0008] In a feasible solution, a plurality of cooperating portions are provided on the push rod member along the axial direction of the push rod member, and the positioning unit is fixedly combined with the cooperating portions. The cooperating portions fix the positioning unit on the push rod member to prevent relative movement between the positioning unit and the push rod member when the operator continuously pushes the push rod member.

[0009] In a feasible solution, the mating part is a groove structure or a hole structure, and the positioning unit has a positioning part configured to cooperate with the groove structure or the hole structure. The positioning part extends into the groove structure or the hole structure to facilitate fixing the positioning unit on the push rod member.

[0010] In a feasible solution, an adjustment hole is formed in the positioning unit, the push rod member passes through the adjustment hole, and the positioning unit moves along the axial direction of the push rod member through the adjustment hole. When the positioning unit moves along the axial direction of the push rod member, the adjustment hole can prevent the positioning unit from separating from the push rod member.

[0011] In a feasible solution, a positioning hole communicating with the adjustment hole is further formed in the positioning unit. When the push rod member extends from the adjustment hole into the positioning hole, the positioning part is connected to the mating part. The positioning hole facilitates connecting the positioning part to the mating part.

[0012] In a feasible solution, a connection hole and a reamed hole communicating with the connection hole are formed in the push rod member, and the puncture needle is fixedly disposed through the connection hole and the reamed hole. The puncture needle can be conveniently inserted into the connection hole through the reamed hole, and an adhesive material is filled in the reamed hole to fix the puncture needle in the connection hole and the reamed hole.

[0013] In a feasible solution, a limit and anti - detachment unit is further provided between the cylinder body and the push rod member, and the limit and anti - detachment unit is used to prevent the push rod member from detaching from the cylinder body. When the push rod member moves in the cylinder body, the limit and anti - detachment unit can prevent the push rod member from separating from the cylinder body, facilitating the operator to operate the push rod member.

[0014] The puncture needle includes a body, the body is a hollow tubular structure, the body has a front end and a rear end disposed opposite to each other, and a plurality of incisions are provided on the tube wall of the body. The plurality of incisions are respectively located at different positions in the extending direction of the body, and the plurality of incisions face at least two different directions;

[0015] The advantages of the present invention are that a plurality of incisions in different directions are provided on the puncture needle, enabling the puncture needle to bend in multiple directions, facilitating bypassing blood vessels and tissues during the puncture process, and the plurality of incisions are distributed at different positions in the extending direction of the body, making the puncture needle have better rigidity and facilitating the puncture of living tissues.

[0016] In a feasible solution, at least four of the incisions face in different directions. By providing 4 incisions facing different directions, it is convenient for the puncture needle to bend in 4 directions and can better bypass blood vessels or other tissues.

[0017] In a feasible solution, the incisions with different orientations are arranged at continuous intervals along the axial direction of the body. The incisions with different orientations are arranged continuously, so that this section of the puncture needle has better bending ability in multiple directions, facilitating the selective bending of the puncture needle.

[0018] In a feasible solution, the incisions are arranged in a spiral along the axial direction of the body. Through the spiral arrangement, the puncture needle is more regular when bending, facilitating the control of its bending angle and the bending position.

[0019] In a feasible solution, the angle between the incision orientations of adjacent incisions is 90 degrees. Since the adjacent incision orientations are perpendicular, it makes it easier for the operator to control the bending direction.

[0020] In a feasible solution, from the front end to the rear end, the spacing distance between adjacent incisions gradually increases or gradually decreases. When the spacing between the rear incisions is larger than that at the front end, the front end of the puncture needle is easier to bend, while the rear end has greater rigidity, facilitating the control of the puncture direction of the puncture needle, which is suitable for the case where the living tissue is relatively soft; when the spacing between the front incisions is larger than that at the rear end, the rear end of the puncture needle is easier to bend, while the front end has greater rigidity, which is applicable to the case where the living tissue is relatively dense and not easy to puncture.

[0021] In a feasible solution, the plane where the incision is located forms an angle α with the extending direction of the body, and 60 degrees ≤ α ≤ 90 degrees. Limiting the inclination angle of the incision makes the distribution of a single incision on the body not too long, so as to avoid the appearance of a fish-scale structure when the body bends, causing secondary damage to the living tissue during the puncture process.

[0022] In a feasible solution, after the incision is projected onto the cross-section of the body, the length of the incision along the outer wall of the body is greater than or equal to half of the perimeter of the cross-section of the body. Such a setting makes the incision have a more appropriate depth, facilitating the bending of the body.

[0023] In a feasible solution, a film covering the incision is provided on the surface of the body. The setting of the film isolates the inside and outside of the puncture needle body.

[0024] In a feasible solution, the adsorption head includes a body, the body is a hollow shell, the side of the shell that adsorbs the adsorbed object is provided with an opening, at least one adsorption cavity and at least one operation cavity are provided inside the body, the operation cavity and the adsorption cavity are arranged at intervals and both open towards the adsorbed object, at least one adsorption channel and at least one operation channel are opened on the body, one end of the adsorption channel communicates with the adsorption cavity; one end of the operation channel communicates with the operation cavity.

[0025] The advantages of the above solution are as follows: The adsorption cavity adsorbs on the surface of the living body, so that the adsorption head can adsorb on the surface of the living tissue. Then, an endoscope or a puncture needle is inserted into the operation cavity, making the endoscope or the puncture needle relatively stable with respect to the operation cavity. Subsequently, surgical operations are performed on the living body. Since the adsorption head adsorbs on the surface of the living body and is relatively stationary with respect to the surface of the living body, the surgical instruments also remain stable with respect to the surface of the living body, making the controllability of the surgical instruments for operating on the living body higher and facilitating the smooth progress of the surgery.

[0026] In a feasible solution, the body has a first adsorption cavity and a second adsorption cavity. The first adsorption cavity and the second adsorption cavity communicate with each other, and the first adsorption cavity and / or the second adsorption cavity communicate with the adsorption channel.

[0027] By providing two adsorption cavities, the adsorption head can adsorb more firmly on the surface of the living body, facilitating the progress of the surgery. Moreover, since the first adsorption cavity and the second adsorption cavity communicate with each other, the air pressures in the first adsorption cavity and the second adsorption cavity are the same, and they have the same adsorption force during adsorption.

[0028] In a feasible solution, the first adsorption cavity and the second adsorption cavity are connected through a communication structure, and the communication structure can be a channel, a through hole, etc.

[0029] In a feasible solution, the communication structure is a communication channel opened in the body. By connecting through the communication channel, the first adsorption cavity and the second adsorption cavity can be at a certain distance from each other, and it can still ensure the adsorption forces of the first adsorption cavity and the second adsorption cavity after adsorbing on the surface of the living body.

[0030] In a feasible solution, the communication structure is a connecting pipe. The connecting pipe connects the first adsorption cavity and the second adsorption cavity, and the connecting pipe is detachable for easy replacement.

[0031] In a feasible solution, the communication structure further includes a receiving channel opened in the body. The connecting pipe is arranged in the receiving channel and connects the first adsorption cavity and the second adsorption cavity. By providing a receiving channel in the body and arranging the connecting pipe in the receiving channel, the overall body is relatively flat, facilitating the insertion into the living body for adsorption operations.

[0032] In a feasible solution, the connecting pipe has a front end and a rear end. Both the front end and the rear end of the connecting pipe are open. The rear end opening communicates with the first adsorption cavity, and the front end opening communicates with the second adsorption cavity.

[0033] In a feasible solution, the front end is provided with a first extension section extending along the axial direction of the connecting pipe. With such a setting, there is a certain distance between the connecting pipe and the body, avoiding the blockage of the air flow in the connecting pipe.

[0034] In a feasible solution, the first extension section is an arc structure. The arc structure has good support, does not hinder the air flow in the connecting pipe, and is convenient for production and manufacturing.

[0035] In a feasible solution, a second extension section extending along the axial direction of the connecting pipe is provided at the rear end.

[0036] With such a setting, a certain distance is provided between the connecting pipe and the main body, avoiding the blockage of the air flow in the connecting pipe.

[0037] In a feasible solution, the second extension section is an arc structure. The arc structure has good support, does not hinder the air flow in the connecting pipe, and is convenient for production and manufacturing.

[0038] In a feasible solution, the connecting pipe is arranged on the side wall of the operation cavity. Thus, the operation cavity will not be blocked, facilitating the use of surgical instruments.

[0039] In a feasible solution, two connecting pipes are provided between the first adsorption cavity and the second adsorption cavity, and the connecting pipes are respectively located on the opposite side walls of the operation cavity. Thus, the air flow volume between the first adsorption cavity and the second adsorption cavity is larger, and the connecting pipes do not occupy the space in the operation cavity, avoiding affecting the use of surgical instruments.

[0040] In a feasible solution, a first adsorption cavity and a second adsorption cavity are provided in the main body, and the first adsorption cavity and the second adsorption cavity are respectively communicated with the two adsorption channels. With such a setting, the first adsorption cavity and the second adsorption cavity can be respectively connected to different suction devices, having better adjustment flexibility.

[0041] In a feasible solution, the side surface of the main body opposite to the opening side is an arc surface, facilitating the adsorption head to extend into the living body for adsorption.

[0042] In a feasible solution, a first operation channel and a second operation channel are opened on the main body, and both the first operation channel and the second operation channel communicate with the operation cavity. Different surgical instruments are inserted into the first operation channel and the second operation channel respectively, so that the surgical instruments do not interfere with each other.

[0043] In a feasible solution, the cross-sectional area of the first operation channel is larger than that of the second operation channel. It is convenient to insert a surgical instrument with a larger diameter into the first operation channel.

[0044] In a feasible solution, the second operation channel is inclined relative to the surface of the object to be adsorbed. The inclined setting facilitates the insertion of surgical instruments into the living body, for example, facilitating the puncture of a puncture needle.

[0045] Compared with the prior art, an adsorption cavity and an operation cavity are arranged in the adsorption head. When the adsorption head adsorbs on the surface of a living tissue, the surgical instrument located in the operation cavity can be stationary relative to the surface of the living tissue, thereby improving the stability and success rate of the surgical operation and reducing the probability of causing secondary injuries. And by arranging a plurality of adsorption cavities, the adsorption head can adsorb more stably on the living body surface, facilitating the surgical operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The following drawings are only used to enable those skilled in the art to better understand the technical solutions of the present invention and are not a limitation of the present invention. Those skilled in the art can obtain other drawings according to the technical solutions of the present invention.

[0047] Figure 1 It is a schematic structural diagram of a puncture device according to an embodiment provided by the present invention;

[0048] Figure 2 It is a perspective view of a puncture needle provided by the present invention;

[0049] Figure 3 According to the present invention Figure 2 The enlarged view at A;

[0050] Figure 4 It is a front view of a puncture needle provided by the present invention;

[0051] Figure 5 According to the present invention Figure 4 The sectional view taken along the direction of B-B;

[0052] Figure 6 It is Figure 1 The schematic structural diagram of the puncture driving assembly;

[0053] Figure 7 It is Figure 6 The exploded schematic diagram of the puncture driving assembly shown;

[0054] Figure 8 It is Figure 7 The schematic structural diagram of the cylinder shown;

[0055] Figure 9 It is Figure 7 The schematic structural diagram of the first limiting member shown;

[0056] Figure 10 It is Figure 7 The schematic structural diagram of the positioning unit shown;

[0057] Figure 11 It is Figure 7 The schematic structural diagram of the push rod member shown;

[0058] Figure 12 The Figure 11 schematic structural diagram of the push rod member shown;

[0059] Figure 13 The Figure 1 schematic structural diagram of the suction head shown;

[0060] Figure 14 The Figure 13 right view of the suction head structure;

[0061] Figure 15 The Figure 13 cross-sectional view in the A-A direction of

[0062] Figure 16 The Figure 13 cross-sectional view in the B-B direction of

[0063] Figure 17 The Figure 16 stereogram of the connecting pipe of

[0064] Label description:

[0065] 100, puncture device; 10, puncture needle; 11, puncture needle body; 11a, front end; 11b, rear end; 111, guiding part; 12, incision; 20, puncture driving assembly; 21, cylinder; 211, groove; 212, anti-slip part; 213, abutting part; 22, push rod member; 221, fitting part; 222, reaming; 223, connecting hole; 23, positioning unit; 231, positioning part; 232, positioning hole; 233, adjusting hole; 24, damping member; 25, limiting and anti-disengagement unit; 251, first limiting member; 252, second limiting member; 253, protrusion; 26, marking unit; 27, Luer connector; 44, operation channel; 30, catheter; 31, flexible section; 5, suction head; 50, suction head body; 51, suction cavity; 511, first suction cavity; 512, second suction cavity; 513, connecting pipe; 5131, first extension section; 5132, second extension section; 52, operation cavity; 53, operation channel; 531, first operation channel; 532, second operation channel; 54, suction channel. Specific embodiments

[0066] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0067] For a better description and illustration of the embodiments of the present application, one or more drawings may be referred to. However, the additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the inventions, the currently described embodiments, or the preferred modes of the present application.

[0068] It should be noted that when a component is referred to as being "connected" to another component, it can be directly connected to the other component or there may also be an intermediate component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0069] As Figures 1 to 12 shown, the present invention provides a puncture device 100, and the puncture device 100 is used for medical puncture or injection of drugs and biological materials or aspiration of body fluids. Here, the puncture device 100 is used to puncture the heart (not shown in the figure) and inject a non-shrinking substance such as a self-coagulating and biocompatible hydrogel into the left ventricular wall of the heart (not shown in the figure).

[0070] Specifically, the puncture device 100 includes a puncture needle 10, a catheter 30, a suction head 5, and a puncture driving assembly 20. One end of the catheter 30 is connected to the suction head 5, and the other end is connected to the puncture driving assembly 20. One end of the puncture needle 10 penetrates the catheter 30 and extends to the suction head 5, and the other end is connected to the puncture driving assembly 20. The puncture driving assembly 20 drives the puncture needle 10 to puncture; the puncture depth of the puncture needle 10 can be accurately controlled through the puncture driving assembly 20.

[0071] It can be understood that through the suction of the suction device, the suction head 5 can be adsorbed on the surface of the living tissue. The endoscope or the puncture needle 10 extends into the suction head 5 through the catheter 30, making the endoscope or the puncture needle 10 relatively stable. When performing a surgical operation on the living body, since the suction head 5 is adsorbed on the surface of the living body and moves synchronously with the surface of the living body, the endoscope or the puncture needle 10 can maintain a stable state relative to the surface of the living body. Furthermore, the operation of the endoscope or the puncture needle 10 on the living body has higher controllability, facilitating the smooth progress of the operation.

[0072] Preferably, a flexible section 31 is provided on the catheter 30, and the catheter 30 is bent through the flexible section 31. Preferably, the radius at which the flexible section 31 can be bent is adjustable, that is, the puncture path of the catheter 30 can be adjusted (the path of the catheter 30 can be arbitrarily adjusted), so that the catheter 30 has stronger operability, better anti-bending strength, stronger ability to bypass blood vessels, bones, and nerve tissues, and reduces the risk of piercing organs and more accurately punctures to the target. Moreover, when the adsorption head 5 is displaced with the living body, the flexible section 31 can play a connecting role and maintain the stability of other parts of the support tube.

[0073] The flexible section 31 is provided to facilitate the bending of the catheter 30, and its setting method can be diverse. For example, there can be multiple flexible sections 31, which can be arranged at intervals, or the entire catheter 30 can be a flexible structure, etc.

[0074] Specifically, the puncture needle 10 includes a puncture needle body 11. The puncture needle body 11 is a hollow tube, and the cross-section of the puncture needle body 11 can be circular, oval, square, etc. In this embodiment, the cross-section of the puncture needle body 11 is circular.

[0075] The puncture needle 10 can be made of stainless steel, nitinol alloy, or medical polymer materials to improve the structural strength of the puncture needle 10, thereby facilitating the puncture of the puncture needle 10. The medical-grade polymer materials include, but are not limited to, polyurethane, polypropylene, polyethylene, polycarbonate, ABS resin, modified nylon, etc.

[0076] Further, the puncture needle body 11 has a front end 11a and a rear end 11b that are oppositely arranged. It is worth explaining that the front end 11a is the end of the puncture needle 10 away from the surgical operator, that is, the end for puncturing, and the rear end 11b is the end of the puncture needle 10 close to the surgical operator. Of course, the definition of the "front end 11a" and the "rear end 11b" here is intended to more clearly explain the puncture needle body 11, not to limit the present invention.

[0077] A guiding portion 111 is provided at the front end 11a of the puncture needle body 11. The guiding portion 111 is used for guiding during the puncture process, so that the puncture needle 10 can smoothly pierce the human cortex and puncture to the predetermined target.

[0078] Preferably, the guiding portion 111 is an inclined surface, that is, the end surface of the front end 11a of the puncture needle body 11 is cut, so that the end surface of the front end 11a forms a "needle tip"-like structure with a guiding function.

[0079] Please refer to Figure 3, a plurality of incisions 12 are provided on the tube wall of the puncture needle body 11, the incisions 12 are respectively located at different positions in the extending direction of the puncture needle body 11, and the incisions 12 face at least two different directions.

[0080] It should be noted that the ray of the perpendicular bisector of the line segment connecting the two ends of the incision 12 in the plane of the incision facing the opening side of the incision is defined as the direction line of the incision 12, and the direction of the above ray is the direction of the direction line, which is the incision direction;

[0081] The ray after projecting the direction line of the incision 12 onto the cross-section of the body is defined as the orientation line of the incision, and the direction of the above ray is the direction of the orientation line, which is the orientation of the incision.

[0082] It can be understood that making an incision 12 on the puncture needle body 11 changes the structural stiffness of the puncture needle body 11, making the puncture needle body 11 easier to bend at its incision 12. The incisions 12 are arranged at different positions in the extending direction of the puncture needle body 11, so that there will not be multiple incisions 12 with different orientations in the same radial section of the puncture needle body 11, thereby making the puncture needle body 11 have better rigidity and preventing excessive bending outside the body during puncture from affecting the puncture direction.

[0083] Preferably, at least four of the incisions 12 have different orientations. It can be understood that by providing 4 incisions 12 with different orientations, it is convenient for the puncture needle 10 to bend in 4 directions, and further makes the direction of the puncture needle 10 easier to adjust to better bypass blood vessels or other tissues.

[0084] Preferably, the incisions 12 with different orientations are arranged continuously and at intervals along the axial direction of the puncture needle body 11. It can be understood that arranging the incisions 12 with different orientations continuously enables this section of the puncture needle body 11 to have the bending ability in multiple directions, facilitating the selective bending of the puncture needle 10.

[0085] Preferably, the incisions 12 are arranged in a spiral along the axial direction of the puncture needle body 11. Through the spiral arrangement, the puncture needle 10 is more regular when bending, facilitating the control of its bending angle and the bending position.

[0086] It should be explained that the incisions 12 are arranged in a spiral manner, but the angles between the planes where different incisions 12 are located and the extending direction of the puncture needle body 11 can be the same or can be set differently according to needs. The spiral arrangement means that the midpoints of adjacent incisions 12 are connected along the surface of the body and are approximately in a spiral shape, but it is the arrangement method between different incisions 12. It is worth mentioning that when the incisions 12 are arranged in a uniform spiral shape, when controlling the bending of the puncture needle 10, the needle body of the puncture needle can present a relatively smooth arc, facilitating the control.

[0087] Preferably, the angle between the cutting directions of adjacent ones of the incisions 12 is 90 degrees. It should be noted that since the directions of adjacent incisions 12 are perpendicular to each other, it is easier for the operator to control the bending direction of the puncture needle 10.

[0088] Furthermore, from the front end 11a to the rear end 11b, the spacing distance between adjacent ones of the incisions 12 gradually increases or gradually decreases.

[0089] It can be understood that when the spacing between the rear-end incisions 12 is larger than that at the front end, the front end of the puncture needle 10 is easier to bend, while the rear end has greater rigidity, facilitating the control of the puncture direction of the puncture needle 10, which is suitable for the case where the living tissue is relatively soft; when the spacing between the front-end incisions 12 is larger than that at the rear end, the rear end of the puncture needle 10 is easier to bend, while the front end has greater rigidity, which is applicable to the case where the living tissue is relatively dense and not easily punctured.

[0090] Preferably, the plane where the incision 12 is located forms an angle α with the extending direction of the puncture needle body 11, where 60 degrees ≤ α ≤ 90 degrees. It can be understood that restricting the inclination angle of the incision 12 prevents a single incision 12 from being too long on the puncture needle body 11, which may cause a fish-scale structure when the puncture needle body 11 bends, causing secondary damage to the living tissue during the puncture process.

[0091] Combined with 3 and Figure 5 After the incision 12 is projected onto the cross-section of the body, the length of the incision 12 along the outer wall of the puncture needle body 11 is greater than or equal to half of the perimeter of the cross-section of the puncture needle body 11. With such a setting, the incision has a more appropriate depth, facilitating the bending of the puncture needle body 11. It should be noted that the depth of the incision affects the bending ability and structural strength of the puncture needle body 11. When the depth of the incision is small, the bending ability of the puncture needle body 11 is poor, but the rigidity of the body is high, facilitating puncture.

[0092] Preferably, a film covering the incision 12 is provided on the surface of the puncture needle body 11. The film isolates the inside and outside of the puncture needle body 11. When it is necessary to inject a fluid substance into the living body through the puncture needle, the film can prevent the fluid substance from leaking out through the incision. Preferably, the film can be made of nylon material.

[0093] Such as Figure 6 and Figure 7As shown, the puncture driving assembly 20 includes a cylinder body 21, a push rod member 22 and a positioning unit 23. An abutting portion 213 extending outward is provided at the edge of one end of the cylinder body 21. The push rod member 22 is movably inserted into the cylinder body 21 to drive the puncture needle 10 to puncture. The positioning unit 23 can move axially along the push rod member 22 and can be fixed to the push rod member 22, and is in contact and cooperation with the abutting portion 213.

[0094] It can be understood that a chute (not shown in the figure) cooperating with the push rod member 22 is provided in the cylinder body 21, and the push rod member 22 can slide in the chute. According to the puncture depth of the puncture needle 10 required, the position where the positioning unit 23 is fixed on the push rod member 22 is calculated, and then the push rod member 22 is pushed to move the push rod member 22 in the axial direction of the cylinder body 21 and drive the puncture needle 10. When the positioning unit 23 is in contact and cooperation with the abutting portion 213 on the cylinder body 21, the push rod member 22 stops moving in the chute of the cylinder body 21, thereby driving the puncture needle 10 to puncture to a predetermined depth, so as to achieve the purpose of accurately controlling the puncture depth of the puncture needle 10.

[0095] Among them, the cylinder body 21 is generally cylindrical. Of course, in other embodiments, the cylinder body 21 can also be in other shapes, such as oval.

[0096] The abutting portion 213 is integrally provided with the cylinder body 21 to facilitate the processing and manufacturing of the cylinder body 21 and the abutting portion 213.

[0097] Preferably, two abutting portions 213 are provided and are respectively arranged on both sides of the cylinder body 21. The cylinder body 21 and the abutting portion 213 can both be made of stainless steel, nitinol alloy or medical polymer materials to improve the structural strength of the cylinder body 21 and the abutting portion 213. Medical-grade polymer materials include, but are not limited to, polyurethane, polypropylene, polyethylene, polycarbonate, ABS resin, modified nylon, etc.

[0098] Further, a Luer connector 27 is provided on the push rod member 22, and one end of the puncture needle 10 is located in the Luer connector 27. The Luer connector 27 is used to connect with an external suction device.

[0099] Further, as Figure 8 shown, an anti-slip portion 212 is provided on the outer wall of the cylinder body 21. When the operator holds the cylinder body 21, the anti-slip portion 212 can increase the friction between the operator's hand and the cylinder body 21, and further prevent the operator's hand from slipping on the cylinder body 21.

[0100] In this embodiment, the anti-slip portion 212 is an anti-slip protrusion. Of course, in other embodiments, the anti-slip portion 212 can be an anti-slip pattern or a rubber sheet, etc., as long as this structure can play an anti-slip role.

[0101] Further, asFigure 6 and Figure 11 As shown in Figure 11 , a plurality of engaging portions 221 are provided on the push rod member 22 along the axial direction of the push rod member 22, and the positioning unit 23 is fixedly engaged with the engaging portions 221.

[0102] It can be understood that the engaging portion 221 can fix the positioning unit 23 on the push rod member 22. When the positioning unit 23 on the push rod member 22 abuts against the abutting portion 213 on the cylinder body 21, the positioning unit 23 is prevented from separating from the push rod member 22.

[0103] In the present embodiment, the engaging portion 221 is a groove structure, and the positioning unit 23 has a positioning portion 231 configured to cooperate with the groove structure.

[0104] It can be understood that when the positioning unit 23 reaches a predetermined position on the push rod member 22, the positioning portion 231 can be snapped into the engaging portion 221 to prevent the positioning unit 23 from moving relative to the push rod member, making the structure for fixing the positioning unit 23 on the push rod member 22 simpler and the operation more convenient.

[0105] Preferably, the push rod member 22 has a first side surface (not shown in the figure) and a second side surface (not shown in the figure) disposed opposite to each other, and the engaging portion 221 is provided on the first side surface of the push rod member 22.

[0106] Of course, the engaging portion 221 can be provided on the second side surface, and the positioning portion 231 on the positioning unit 23 can be connected to the engaging portion 221 on the first side surface or the second side surface.

[0107] Preferably, the engaging portion 221 on the second side surface can be arranged in a staggered manner with the engaging portion 221 on the first side surface, so that the position of the positioning unit 23 fixed on the push rod member 22 is more accurate.

[0108] Further, the engaging portions 221 on the first side surface and the engaging portions 221 on the second side surface are arranged in one-to-one correspondence, and the positioning portion 231 can be simultaneously connected to the two corresponding engaging portions 221 on the first side surface and the second side surface.

[0109] It can be understood that when fixing the positioning unit 23 on the push rod member 22, it is necessary to simultaneously connect the positioning portion 231 on the positioning unit 23 to the engaging portions 221 on both sides of the push rod member 22, so that the positioning unit 23 is more firmly fixed on the push rod member 22 and the positioning unit 23 is prevented from falling off the push rod member 22.

[0110] Of course, in other embodiments, the engaging portion 221 is a hole structure, and the positioning unit 23 has a positioning portion 231 configured to cooperate with the hole structure.

[0111] Further, as Figure 10 shown, an adjustment hole 233 is formed in the positioning unit 23, the push rod member 22 passes through the adjustment hole 233, and the positioning unit 23 moves along the axial direction of the push rod member 22 through the adjustment hole 233.

[0112] It can be understood that when the positioning unit 23 moves along the push rod member 22, the push rod member 22 must first pass through the adjustment hole 233 in the positioning unit 23. When the positioning unit 23 moves along the push rod member 22, when the positioning unit 23 moves to a predetermined position of the push rod member 22, the engaging portion 221 on the push rod member 22 fixes the positioning unit 23.

[0113] Wherein, the minimum inner diameter of the adjustment hole 233 is greater than the maximum outer diameter of the push rod member 22, so that the positioning unit 23 can move on the push rod member 22.

[0114] Further, as Figure 10 shown, a positioning hole 232 communicating with the adjustment hole 233 is further formed in the positioning unit 23. When the push rod member 22 extends from the adjustment hole 233 into the positioning hole 232, the positioning portion 231 is connected to the engaging portion 221.

[0115] It can be understood that when the positioning unit 23 moves to a predetermined position of the push rod member 22, the operator pushes the push rod member 22 to make the push rod member 22 extend from the adjustment hole 233 into the positioning hole 232. When the push rod member 22 enters the positioning hole 232, the positioning portion 231 is connected to the engaging portion 221 to fix the positioning unit 23 on the push rod member 22.

[0116] Specifically, the positioning portion 231 is the side wall of the positioning hole 232. When the push rod member 22 enters the positioning hole 232, the positioning portion 231 will be clamped in the card slot to clamp the positioning unit 23 on the push rod member 22.

[0117] Further, as Figure 12 shown, a connection hole 223 and an enlarged hole 222 communicating with the connection hole 223 are formed in the push rod member 22, and the puncture needle 10 is fixedly arranged in the connection hole 223 and the enlarged hole 222.

[0118] It can be understood that the enlarged hole 222 can guide the puncture needle 10 into the connection hole 223, and the puncture needle 10 can be fixed in the connection hole 223 and the enlarged hole 222 by an adhesive (which can be glue). At the same time, by providing the enlarged hole 222, when the adhesive is filled in the enlarged hole 222, the attachment area of the adhesive can be increased, so that the puncture needle 10 is fixed more firmly.

[0119] Further, as Figure 7As shown, a damping member 24 is provided between the cylinder body 21 and the push rod member 22, and the damping member 24 is used to increase the frictional force between the push rod member 22 and the inner wall of the cylinder body 21.

[0120] It can be understood that the damping member 24 increases the damping coefficient between the push rod member 22 and the cylinder body 21, and can play a role in fixing the push rod member 22 in the cylinder body 21. When pushing the push rod member 22, it is necessary to overcome the frictional force between the push rod member 22 and the cylinder body 21 to prevent an external object from touching the push rod member 22 and causing the push rod member 22 to slide in the cylinder body 21, so as to change the puncture depth of the puncture needle 10.

[0121] Wherein, one side of the damping member 24 is installed on the side wall of the push rod member 22, and the other side abuts against the inner wall of the cylinder body 21.

[0122] Of course, in other embodiments, one side of the damping member 24 is installed on the inner wall of the cylinder body 21, and the other side abuts against the inner wall of the push rod member 22.

[0123] Preferably, the damping member 24 is annularly arranged, the inner edge of the damping member 24 is installed on the push rod member 22, and the outer edge of the damping member 24 abuts against the inner wall of the cylinder body 21.

[0124] It can be understood that an annular groove for installing the damping member 24 is formed on the push rod member 22, and the periphery of the push rod member 22 is in contact with the inner wall of the cylinder body 21 through the damping member 24, so that the frictional force received in the circumferential direction of the push rod member 22 is the same, and the problem of uneven acting force of the push rod member 22 on the damping member 24 caused by the movement of the push rod member 22 in the cylinder body 21 is avoided.

[0125] Of course, in other embodiments, the inner edge of the damping member 24 abuts against the push rod member 22, and the outer edge of the damping member 24 is installed on the inner wall of the cylinder body 21.

[0126] Furthermore, as Figure 7 shown, a limit and anti - detachment unit 25 is further provided between the cylinder body 21 and the push rod member 22, and the limit and anti - detachment unit 25 is used to prevent the push rod member 22 from detaching from the cylinder body 21. When the push rod member 22 moves in the cylinder body 21, the limit and anti - detachment unit 25 can prevent the push rod member 22 from separating from the cylinder body 21, so as to facilitate the operator to operate the push rod member 22.

[0127] Preferably, the position-limiting and anti-disengagement unit 25 includes a first position-limiting member 251 and a second position-limiting member 252. The first position-limiting member 251 is disposed on the inner wall of the cylinder body 21, and the second position-limiting member 252 is disposed on the outer sidewall of the push rod member 22. The first position-limiting member 251 cooperates with the second position-limiting member 252 to prevent the push rod member 22 from disengaging from the cylinder body 21.

[0128] It can be understood that the second position-limiting member 252 is disposed at one end of the push rod member 22 inside the cylinder body 21. When the push rod member 22 moves inside the cylinder body 21, when the second position-limiting member 252 on the push rod member 22 moves to the position of the first position-limiting member 251, the first position-limiting member 251 can block the movement of the second position-limiting member 252 in the axial direction inside the cylinder body 21, avoiding the push rod member 22 from disengaging from the cylinder body 21.

[0129] Furthermore, as Figure 9 shown, a groove 211 is formed on the inner wall of the cylinder body 21, and a protrusion 253 that cooperates with the groove 211 is provided on the outer sidewall of the first position-limiting member 251.

[0130] It can be understood that when installing the first position-limiting member 251, first push the first position-limiting member 251 so that the first position-limiting member 251 moves along the axial direction of the cylinder body 21 until the protrusion 253 on the first position-limiting member 251 is engaged with the groove 211 on the inner wall of the cylinder body 21, and the first position-limiting member 251 stops moving inside the cylinder body 21, fixing the first position-limiting member 251 inside the cylinder body 21.

[0131] In this embodiment, the first position-limiting member 251 is cylindrical. Preferably, the axis of the first position-limiting member 251 substantially coincides with the axis of the cylinder body 21. Of course, in other embodiments, the axis of the first position-limiting member 251 may not coincide with the axis of the cylinder body 21.

[0132] Of course, in other embodiments, a protrusion 253 is provided on the inner wall of the cylinder body 21, and a groove 211 that cooperates with the protrusion 253 is formed on the outer sidewall of the first position-limiting member 251.

[0133] Preferably, the second position-limiting member 252 is integrally provided with the push rod member 22. The push rod member 22 and the second position-limiting member 252 are integrally formed, thereby facilitating the processing of the push rod member 22 and the second position-limiting member 252.

[0134] Furthermore, as Figure 11 shown, a marking unit 26 is provided on the push rod member 22, and the marking unit 26 is used to mark the position of the positioning unit 23 on the push rod member 22.

[0135] It can be understood that the positioning unit 23 is clamped at a predetermined position of the push rod member 22 according to the identification unit 26 of the push rod member 22. At the same time, the moving distance of the push rod member 22 in the cylinder body 21 is judged through the identification unit 26, so as to grasp the puncture depth of the puncture needle 10, ensure the puncture accuracy rate, and improve the puncture efficiency.

[0136] Wherein, in the present embodiment, the identification unit 26 can be a scale state identification. Of course, in other embodiments, the identification unit 26 can also be an identification other than a scale, as long as the identification can measure the moving distance of the push rod member 22 along the axial direction of the cylinder body 21.

[0137] Preferably, the identification unit 26 includes a plurality of identification parts, the plurality of identification parts are distributed along the length direction of the push rod member 22, and the positioning unit 23 also serves as an indicating part and cooperates with the identification unit 26.

[0138] It can be understood that, with more identification parts arranged in the length direction of the push rod member 22, the position where the positioning unit 23 is fixed on the push rod member 22 is more accurate, so that the puncture depth of the puncture needle 10 is more accurate, and the indicating part can be replaced by the positioning unit 23.

[0139] Furthermore, as Figures 13 to 17 shown, the present invention provides a suction head 5, which includes a suction head body 50. The suction head body 50 is a hollow shell, an opening is formed on the shell, and the direction of the opening is set to face the adsorbed object for adsorption. At least one adsorption cavity 51 and at least one operation cavity 52 are arranged in the suction head body 50. The operation cavity 52 and the adsorption cavity 51 are arranged at intervals, and both the operation cavity 52 and the adsorption cavity 51 are opened towards the adsorbed object. At least one adsorption channel 54 and at least one operation channel 53 are formed on the suction head body 50. One end of the adsorption channel 54 is communicated with the adsorption cavity 51; one end of the operation channel 53 is communicated with the operation cavity 52.

[0140] It should be explained that the adsorption cavity 51 can adsorb on the surface of a living body by connecting a suction device, so that the suction head 5 can adsorb on the surface of the living tissue. The endoscope or the puncture needle extends into the operation cavity 52 through the operation channel 53, so that the endoscope or the puncture needle is relatively stable with respect to the operation cavity 52. When performing a surgical operation on a living body, since the suction head 5 adsorbs on the surface of the living body and moves synchronously with the surface of the living body, and the operation cavity 52 and the adsorption cavity 51 are also relatively fixed, the surgical instrument can maintain a stable state relative to the surface of the living body. Furthermore, the operation of the surgical instrument on the living body has higher controllability, which is convenient for the smooth progress of the operation.

[0141] Preferably, the number of the adsorption chambers 51 is two, and the two adsorption chambers 51 are respectively a first adsorption chamber 511 and a second adsorption chamber 512. The first adsorption chamber 511 and the second adsorption chamber 512 are communicated with each other, and the first adsorption chamber 511 and / or the second adsorption chamber 512 are respectively communicated with the adsorption channel 54. Of course, in other embodiments, the number of the adsorption chambers 51 may also be other numbers, such as 3 or 4, etc., and the specific number may be set according to actual needs.

[0142] It can be understood that by providing two adsorption chambers 51, the adsorption head 5 can be more firmly adsorbed on the surface of the living body, and further, it is convenient for the operation of the surgery. Secondly, since the first adsorption chamber 511 and the second adsorption chamber 512 are communicated with each other, the air pressures in the first adsorption chamber 511 and the second adsorption chamber 512 are the same, and the pressures in the adsorption chamber 51 are the same during adsorption, so that it is convenient to control the adsorption force of the adsorption chamber 51 on the surface of the living body and avoid damaging the surface of the living body due to excessive adsorption intensity.

[0143] Preferably, the first adsorption chamber 511 and the second adsorption chamber 512 are communicated through a communication structure.

[0144] More preferably, the communication structure may be a channel, a through hole, etc.

[0145] In one embodiment, the communication structure is a communication channel opened in the adsorption head body 50, so that the first adsorption chamber 511 and the second adsorption chamber 512 are communicated through the communication channel, so that the first adsorption chamber 511 and the second adsorption chamber 512 can be at a certain distance from each other, and the layout positions of the first adsorption chamber 511 and the second adsorption chamber 52 are more flexible, which is convenient for the adsorption of the adsorption head 5.

[0146] In another embodiment, the communication structure is a connecting pipe 513. The connecting pipe 513 communicates the first adsorption chamber 511 and the second adsorption chamber 512, and the connecting pipe 513 is an independent part and is detachable. It can be understood that using the connecting pipe 513 to connect the first adsorption chamber 511 and the second adsorption chamber 512 has a simple structure, and is more convenient for replacement, repair, processing and installation.

[0147] Preferably, in this embodiment, the adsorption head body 50 has a receiving channel (not shown in the figure), and the connecting pipe 513 is arranged in the receiving channel and communicates the first adsorption chamber 511 and the second adsorption chamber 512. It can be understood that by providing a receiving channel in the adsorption head body 50 and arranging the connecting pipe 513 in the receiving channel, the overall adsorption head body 50 is relatively flat, which is convenient for extending into the living body for adsorption operation.

[0148] Such as Figure 17As shown, the connecting pipe 513 has a front end and a rear end arranged opposite to each other. Both the front end and the rear end of the connecting pipe 513 are open. The opening at the rear end communicates with the first adsorption cavity 511, and the opening at the front end communicates with the second adsorption cavity 512.

[0149] Further, the front end is provided with a first extension section 5131 extending along the axial direction of the connecting pipe 513.

[0150] Preferably, the first extension section 5131 is an arc-shaped structure.

[0151] Further, the rear end is provided with a second extension section 5132 extending along the axial direction of the connecting pipe 513.

[0152] Preferably, the second extension section 5132 is an arc-shaped structure.

[0153] It can be understood that by providing the first extension section 5131 and the second extension section 5132, the openings of the connecting pipe 513 will not be blocked by other structures within the extension sections, so that when the connecting pipe 513 communicates with the two adsorption cavities 51, the air circulation is smoother. Secondly, by setting the first extension section 5131 and the second extension section 5132 as arc-shaped structures and as extensions of the pipe wall of the connecting pipe 513 on the side away from the adsorption cavity 51, the extension sections will not block the air circulation between the connecting pipe 513 and the adsorption cavity 51, and the manufacturing of the extension sections is convenient.

[0154] Preferably, the connecting pipe 513 is arranged on the side wall of the operation cavity 52, so that when the surgical instrument extends into the operation cavity 52 for surgical operation, it will not be blocked by the connecting pipe 513, which is convenient for the use of the surgical instrument.

[0155] Preferably, there are two connecting pipes 513 between the first adsorption cavity 511 and the second adsorption cavity 512, and the connecting pipes 513 are respectively located on the opposite side walls of the operation cavity 52. It can be understood that by providing two connecting pipes 513, the air circulation volume between the first adsorption cavity 511 and the second adsorption cavity 512 is larger, and the adsorption effect is better. Of course, the number of connecting pipes 513 can be selected to be more, such as 3, 4, etc.

[0156] As another implementation manner, the adsorption head body 50 has a first adsorption cavity 511 and a second adsorption cavity 512 therein, and two adsorption channels 54 are provided in the adsorption head body 50. The first adsorption cavity 511 and the second adsorption cavity 512 are respectively communicated with one of the adsorption channels 54. With such a setting, the first adsorption cavity 511 and the second adsorption cavity 512 can be respectively connected to different suction devices, having better flexibility in adjusting the adsorption method.

[0157] Preferably, the side surface of the adsorption head body 50 opposite to the opening side is an arc surface. It can be understood that setting one side of the adsorption head body 50 as an arc-shaped structure facilitates the adsorption head 5 to extend into the living body.

[0158] Preferably, a first operation channel 531 and a second operation channel 532 are formed on the adsorption head body 50, and both the first operation channel 531 and the second operation channel 532 communicate with the operation cavity 52. The first operation channel 531 and the second operation channel 532 are respectively used to extend different surgical instruments so that the surgical instruments will not interfere with each other during use. Of course, in other embodiments, more operation channels 53 can be formed on the adsorption head body 50, and the number of the operation channels 53 is not limited and can be set according to actual needs.

[0159] Preferably, the cross-sectional area of the first operation channel 531 is larger than that of the second operation channel 532. It can be understood that setting the difference in the cross-sectional areas of the first operation channel 531 and the second operation channel 532 facilitates the extension of a surgical instrument with a larger diameter into the first operation channel 531.

[0160] Preferably, the second operation channel 532 is inclined with respect to the surface of the object to be adsorbed.

[0161] It should be noted that the inclined setting of the operation channel 53 facilitates the extension of the surgical instrument into the living body, such as facilitating the puncture of a puncture needle.

[0162] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0163] The above embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A puncture device, characterized in that: it includes a puncture needle, a catheter, a suction head and a puncture driving assembly. One end of the catheter is connected to the suction head, and the other end is connected to the puncture driving assembly. One end of the puncture needle penetrates the catheter and extends to the suction head, and the other end is connected to the puncture driving assembly. The puncture driving assembly drives the puncture needle to puncture; the puncture driving assembly includes a cylinder body, a push rod member and a positioning unit. An abutting portion extending outward is provided at the edge of one end of the cylinder body. The puncture needle extends into the cylinder body from the other end of the cylinder body. The push rod member movably extends into the cylinder body from the end of the cylinder body having the abutting portion and is connected to the puncture needle. The positioning unit is movably arranged along the axial direction of the push rod member and can be fixed to the push rod member. The positioning unit is in contact and cooperation with the abutting portion to position the puncture needle; a plurality of cooperating portions arranged along the axial direction of the push rod member are provided on the push rod member, and the positioning unit is fixedly combined with the cooperating portions; the cooperating portion is a groove structure or a hole structure, and the positioning unit has a positioning portion arranged in cooperation with the groove structure or the hole structure; an adjustment hole is formed in the positioning unit, the push rod member passes through the adjustment hole, and the positioning unit moves along the axial direction of the push rod member through the adjustment hole; a limiting and anti-disengagement unit is further provided between the cylinder body and the push rod member, and the limiting and anti-disengagement unit is used to prevent the push rod member from disengaging from the cylinder body.

2. The puncture device according to claim 1, characterized in that: a positioning hole communicating with the adjustment hole is further formed in the positioning unit. When the push rod member extends into the positioning hole from the adjustment hole, the positioning portion is connected to the cooperating portion.

3. The puncture device according to claim 2, characterized in that: a connection hole and an enlarged hole communicating with the connection hole are formed in the push rod member, and the puncture needle is fixedly arranged in the connection hole and the enlarged hole.

4. The puncture device according to any one of claims 1-3, characterized in that: the puncture needle includes a body, the body is a hollow tubular structure, the body has a front end and a rear end arranged opposite to each other, a plurality of cutouts are provided on the tube wall of the body, the plurality of cutouts are respectively located at different positions in the extending direction of the body, and the plurality of cutouts face at least two different directions.

5. The puncture device according to claim 4, characterized in that: at least four of the cutouts face in different directions from each other.

6. The puncture device according to claim 5, characterized in that: the cutouts facing in different directions from each other are arranged continuously and at intervals along the axial direction of the body.

7. The puncture device according to claim 5, characterized in that: the cutouts are arranged in a spiral pattern along the axial direction of the body.

8. The puncture device according to claim 7, characterized in that: the angle between the cutout directions of adjacent cutouts is 90 degrees.

9. The puncture device according to claim 4, characterized in that: From the front end to the rear end, the spacing distance between adjacent ones of the incisions gradually increases or gradually decreases, the plane where the incision is located forms an angle α with the extending direction of the body, 60 degrees ≤ α ≤ 90 degrees, and after the incision is projected onto the cross-section of the body, the length of the incision along the outer wall of the body is greater than or equal to half of the perimeter of the cross-section of the body.

10. The puncture device according to claim 4, wherein: a film covering the incision is provided on the surface of the body.

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