Piercing needle and piercing device

Abstract

The utility model discloses a puncture needle and puncture device, puncture needle includes puncture needle body, needle handle, first wrist belt fixing device, needle handle is located the outer periphery of puncture needle body, and it is fixed relative to puncture needle body, first wrist belt fixing device includes first fixed part and first wrist belt, first fixed part includes first connecting piece and the first fixed body of being connected to first connecting piece, and first connecting piece is detachably connected to needle handle, first wrist belt includes fixed end, movable end and the first connecting body of being connected to fixed end and movable end, and fixed end is fixed to first fixed body, and movable end can drive first connecting body to move, is used for making first wrist belt winding arm, and is fixed relative to arm, compared with the mode that adopting adhesive tape and a plurality of medical adhesive tape combination in prior art is used to fix puncture needle, can simplify puncture needle fixing operation, and through first wrist belt winding arm improves the fixing effect to puncture needle simultaneously.

Description

Technical Field

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

[0002] Hemodialysis is one of the renal replacement therapies for patients with chronic kidney disease (CKD). Hemodialysis involves draining blood from the body into a hemodialysis machine, where the machine filters out water and toxins from the blood, and then returns the purified blood to the patient to complete the treatment.

[0003] Puncture of the arteriovenous fistula to drain blood from the body is a crucial step in successful dialysis treatment. After the puncture needle is inserted into the fistula, it needs to be fixed to prevent the needle from moving or dislodging due to the traction of the blood pump or other external forces. Currently, the clinical practice often uses a combination of adhesive bandages and multiple medical tapes to fix the puncture needle. However, the fixation effect is limited, the operation is complicated, and it increases the workload of medical staff and the time required to start treatment.

[0004] Therefore, how to simplify the fixation procedure of the puncture needle while improving the fixation effect is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a puncture needle and puncture device that simplifies the puncture needle fixation operation while improving the fixation effect of the puncture needle.

[0006] To achieve the above objectives, this utility model provides a puncture needle, comprising:

[0007] The puncture needle body;

[0008] The needle handle is located on the outer periphery of the puncture needle body and is fixed relative to the puncture needle body;

[0009] A first wristband fixing device includes a first fixing member and a first wristband;

[0010] The first fixing member includes a first connector and a first fixing body connected to the first connector, wherein the first connector is detachably connected to the needle handle;

[0011] The first wristband includes a fixed end, a movable end, and a first connector connected to the fixed end and the movable end. The fixed end is fixed to the first connector, and the movable end can drive the first connector to move, so that the first wristband wraps around the arm and is fixed relative to the arm.

[0012] In one possible implementation, the needle handle is provided with a first groove, the first groove including a first opening and a first slot connected to the first opening and located on the first opening away from the end face of the first groove, and the inner wall of the first slot is provided with a second groove.

[0013] The first connector includes a first support portion connected to the first fixed body and a first protrusion portion protruding from the side of the first support portion. At least one of the first support portion and the first protrusion portion can be deformed and restored, so that the first support portion slides into the first slot portion along the first opening and the first protrusion portion is engaged with the second slot.

[0014] In one possible implementation, the first opening has a constricted structure extending toward the first slot. The first protrusion has a first abutting surface and a first fitting surface. The first abutting surface is located on the side of the first protrusion facing the first fixing body, and the first fitting surface is located on the side of the first protrusion away from the first fixing body. The first fitting surface can fit against the inner wall of the first opening so that the first connector can slide into the first slot along the first opening. The first abutting surface can abut against the side of the second groove near the first opening so as to restrict the first protrusion from disengaging from the second groove.

[0015] In one possible implementation, the same first fixing member includes two first connecting members, which are spaced apart on the same side of the first fixing body so that a clearance space is formed between the two first connecting members for the two first support parts to move towards each other, and the first protrusion is located on the opposite side of the two first support parts.

[0016] The same first slot includes two symmetrically arranged second slots adapted to the first protrusion for engaging the two first protrusions.

[0017] In one possible implementation, a first connector is also included, which is fixed to one end of the puncture needle body and connected to the puncture needle body, and the needle handle is fixed to the first connector.

[0018] In one possible implementation, the first fixing body is located on the side of the needle handle away from the puncture needle body. The extension direction of the first fixing body is perpendicular to the length direction of the puncture needle body. The first fixing body has protrusions at both ends in its extension direction, and a third groove is opened on the side of the two protrusions that are opposite to each other. The third groove corresponds to the first wristband. The two fixed ends are respectively fixed to the corresponding third groove, and the two movable ends can move towards each other on the side of the needle handle away from the first fixing body, so as to make the first connecting body curl up and wrap around and wrap the arm.

[0019] In one possible implementation, there are two first fixing members, and the two first fixing members are spaced apart along the extension direction of the puncture needle body. The first fixing body of the two first fixing members is located on the side of the needle handle away from the puncture needle body, and a fourth groove is provided on the side of the two first fixing bodies facing each other.

[0020] The fixed end is connected to a rotating shaft, and the two ends of the rotating shaft are used to engage with the corresponding fourth groove to prevent the fixed end from detaching from the rotating shaft. The outer surface of the first wristband is provided with a first adhesive piece, and the inner surface of the movable end is provided with a second adhesive piece. The movable end can move around the side of the needle handle away from the first fixed body toward the fixed end and make the first adhesive piece and the second adhesive piece stick together, so that the first connector can be pulled out and wrapped around and wrapped around the arm.

[0021] A puncture device comprising a puncture needle as described in any of the above claims, the puncture device further comprising:

[0022] The tubing has one end connected to the puncture needle and a second connector on it. A second wrist strap fixing device is detachably connected to the second connector.

[0023] The third connector connects one end to the other end of the hose.

[0024] In one possible implementation, the second connector is fixed to the outer surface of the hose, and the second connector is provided with a first groove, and the second wrist strap fixing device is detachably connected to the first groove.

[0025] In one possible implementation, the hose includes a first hose and a second hose, a second connector connects the first hose and the second hose, the second connector is provided with a first groove, and a second wrist strap fixing device is detachably connected to the first groove.

[0026] Compared with the above-mentioned background technology, the puncture needle provided by this utility model includes a puncture needle body, a needle handle, and a first wrist strap fixing device. The needle handle is located on the outer periphery of the puncture needle body and is fixed relative to the puncture needle body. The first wrist strap fixing device includes a first fixing member and a first wrist strap. The first fixing member includes a first connecting member and a first fixing body connected to the first connecting member. The first connecting member is detachably connected to the needle handle. The first wrist strap includes a fixed end, a movable end, and a first connecting body connected to the fixed end and the movable end. The fixed end is fixed to the first fixing body, and the movable end can drive the first connecting body to move, so as to wrap the first wrist strap around the arm and fix it relative to the arm.

[0027] The needle handle is fixed relative to the puncture needle body and located on the outer periphery of the puncture needle body. The first wrist strap fixing device includes a first fixing member and a first wrist strap, which is detachably connected to the needle handle through a first connecting member. This fixes the first fixing member as a whole relative to the needle handle, thereby fixing the first fixing member as a whole relative to the puncture needle body. The first fixing body of the first fixing member is fixed to the fixing end of the first wrist strap to prevent the first wrist strap from detaching. When the puncture needle body is moved into place, the first connecting body can be moved through the movable end of the first wrist strap, so that the first wrist strap wraps around the arm and is fixed relative to the arm, thereby fixing the puncture needle body relative to the arm. The puncture needle body can be fixed by the first wrist strap fixing device alone. Compared with the existing technology that uses a combination of adhesive bandages and multiple medical tapes to fix the puncture needle, this simplifies the puncture needle fixing operation. At the same time, wrapping the arm with the first wrist strap improves the fixation effect of the puncture needle. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the puncture device provided in an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the puncture needle provided in an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the first fixing member provided in an embodiment of the present utility model;

[0032] Figure 4 This is a structural schematic diagram of the first fastener provided in an embodiment of the present utility model from another perspective;

[0033] Figure 5 This is a schematic diagram of the structure of the first groove provided in an embodiment of the present utility model;

[0034] Figure 6 This is a schematic diagram of the structure of the first fixing member and the first groove body provided in the embodiment of the present utility model.

[0035] Figure 7 This is a structural schematic diagram of the first connector installation position provided in an embodiment of the present utility model;

[0036] Figure 8This is a schematic diagram of the structure of the first fastener provided in another embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of the structure of the first fixing member and the first groove body in another embodiment of the present invention.

[0038] Figure 10 This is a schematic diagram of the structure of the hose provided in an embodiment of the present utility model.

[0039] in:

[0040] 1-Puncture needle body, 2-Needle handle, 3-First groove, 6-First fixing body, 7-First wrist strap, 8-First opening, 9-First slot, 10-Second groove, 11-First support, 12-First protrusion, 13-First contact surface, 14-First fitting surface, 15-Protrusion, 16-Third groove, 17-Fourth groove, 18-Rotating shaft, 19-First connector, 20-First flexible tube, 21-Second connector, 22-Second flexible tube, 23-Second wrist strap, 24-Clamp, 25-Third connector, 26-Arc surface, 27-Protrusion, 28-Flexible tube. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] In the description of this utility model, it should be understood that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model.

[0044] The purpose of this invention is to provide a puncture needle and puncture device that simplifies the puncture needle fixation operation while improving the fixation effect of the puncture needle.

[0045] Please see Figure 2To achieve the above objectives, this utility model provides a puncture needle, including a puncture needle body 1, a needle handle 2, and a first wrist strap fixing device. The puncture needle body 1 may be, but is not limited to, made of stainless steel. One end of the puncture needle body 1 has a pointed structure. During the puncture operation, the pointed structure is inserted into the patient's fistula, so that the blood in the fistula blood vessel is drawn out of the body through the flow channel inside the puncture needle body 1.

[0046] The needle handle 2 is located on the outer periphery of the puncture needle body 1 and is fixed relative to the puncture needle body 1. The needle handle 2 may be, but is not limited to, being made of highly flexible elastic plastic. During the puncture operation, the medical staff holds the needle handle 2 with both hands and forcefully inserts the puncture needle body 1 into the patient's fistula. The needle handle 2 provides a point of force for the medical staff's puncture operation. The side of the needle handle 2 away from the puncture needle body 1 is provided with a protrusion 27. The protrusion 27 consists of multiple protrusions on the surface of the needle handle 2. The protrusion 27 increases the friction when gripping and prevents slippage during the puncture operation. The needle handle 2 is provided with a first groove 3, which is also opened on the side of the needle handle 2 away from the puncture needle body 1.

[0047] The first wristband fixing device includes a first fixing member and a first wristband 7. The first fixing member includes a first connector and a first fixing body 6 connected to the first connector. The first connector is detachably connected to the needle handle 2. The first wristband 7 includes a fixed end, a movable end, and a first connecting body connected to the fixed end and the movable end. The fixed end is fixed to the first fixing body 6, and the movable end can drive the first connecting body to move, so that the first wristband 7 wraps around the arm and is fixed relative to the arm.

[0048] The needle handle 2 is fixed relative to the puncture needle body 1 and located on the outer periphery of the puncture needle body 1. The first wrist strap fixing device includes a first fixing member and a first wrist strap 7, which is detachably connected to the needle handle 2 through a first connecting member, so that the first fixing member is fixed relative to the needle handle 2 as a whole, and thus the first fixing member is fixed relative to the puncture needle body 1 as a whole. The first fixing body 6 of the first fixing member is fixed to the fixing end of the first wrist strap 7 to limit the detachment of the first wrist strap 7. When the puncture needle body 1 is moved into place, the first connecting body can be moved by the movable end of the first wrist strap 7, so that the first wrist strap 7 wraps around the arm and is fixed relative to the arm, thereby fixing the puncture needle body 1 relative to the arm. The puncture needle body 1 can be fixed by the first wrist strap fixing device alone. Compared with the existing technology that uses a combination of adhesive bandages and multiple medical tapes to fix the puncture needle, it can simplify the puncture needle fixing operation. At the same time, the first wrist strap 7 wraps around the arm to improve the fixing effect of the puncture needle.

[0049] Please see Figure 3 , Figure 4 and Figure 5In one possible implementation, the needle handle 2 is provided with a first groove 3, the first groove 3 includes a first opening 8 and a first slot 9 connected to the first opening 8 and located away from the end face of the first groove 3. That is, the first groove 3 includes the first opening 8 and the first slot 9 arranged sequentially along its own depth direction. The inner wall of the first slot 9 is provided with a second groove 10. The first connector includes a first support 11 connected to the first fixing body 6 and a first protrusion 12 protruding from the side of the first support 11. At least one of the first support 11 and the first protrusion 12 can be deformed and restored, so that the first support 11 slides into the first slot 9 along the first opening 8 and the first protrusion 12 is engaged with the second groove 10.

[0050] Please see Figure 6 At least one of the first support portion 11 and the first protrusion 12 can be deformed, so that after the first connector enters the first opening portion 8, it can deform and move to the preset position of the first slot portion 9. The deformation of at least one of the first support portion 11 and the first protrusion 12 can be, but is not limited to, bending, twisting, or squeezing. The first connector can be, but is not limited to, made of elastic plastic. The preset position means that the first protrusion 12 moves to the second groove 10. The space of the second groove 10 can be used for the first support portion 11 and the first protrusion 12 to recover, and at the same time, the first protrusion 12 is located in the second groove 10, so that the first protrusion 12 is engaged with the second groove 10, thereby enabling the first connector to be engaged with the first groove 3.

[0051] In one possible implementation, the first opening 8 has a constricted structure extending toward the first slot 9, that is, the first opening 8 includes at least one inclined surface that is angled to the axis of the first slot 9. The first protrusion 12 is provided with a first abutting surface 13 and a first fitting surface 14. The first abutting surface 13 is located on the side of the first protrusion 12 facing the first fixing body 6, and the first fitting surface 14 is located on the side of the first protrusion 12 away from the first fixing body 6. The first fitting surface 14 can fit against the inner wall of the first opening 8. Preferably, the first fitting surface 14 fits against the aforementioned inclined surface. Surface 14 can slide along the direction of the inclined surface to guide the movement of the first mating surface 14, so that the first connector can slide into the first slot 9 along the first opening 8. The first abutting surface 13 can abut against the side of the second groove 10 near the first opening 8 to restrict the first protrusion 12 from disengaging from the second groove 10, thereby restricting the first connector from disengaging from the first groove 3 in the opposite direction. The first abutting surface 13 can be set as a plane perpendicular to the axis of the first groove 3 to improve the abutting effect of the first abutting surface 13 and the second groove 10, and further restrict the first connector from disengaging from the first groove 3 in the opposite direction.

[0052] In one possible implementation, the same first fixing member includes two first connecting members, which are spaced apart on the same side of the first fixing body 6 to form a clearance space between the two first connecting members for the two first support parts 11 to move towards each other. The first protrusion 12 is located on the opposite side of the two first support parts 11. The first opening 8 can be configured to include two inclined surfaces, and the two inclined surfaces are symmetrically arranged about the axis of the first groove 3. When the first contact surfaces 14 of the two first protrusions 12 respectively contact the corresponding inclined surfaces, it indicates that the position of the first connecting member is accurate. Force can be applied to the first protrusion 12 to slide along the inclined surfaces toward the first slot 9, so that the distance between the two first protrusions 12 is reduced, driving the two first support parts 11 to move towards each other, so that the first connecting member moves to the above-mentioned preset position. The same first slot 9 includes two symmetrically arranged second grooves 10 adapted to the first protrusions 12 for the two first protrusions 12 to engage with the second grooves 10.

[0053] It should be noted that during the process of inserting the first connector into the first groove 3, the medical staff can control the needle handle with one hand and apply force to the first fixing member with the other hand to achieve the above-mentioned engagement process between the first connector and the first groove 3. Preferably, the distance between the two first protrusions 12 is greater than the width of the first groove 9 to ensure that the two first protrusions 12 are not easily dislodged after entering the second groove 10. The distance between the two first support parts 11 is less than the width of the first groove 9 to reduce the friction between the opposite sides of the two first support parts 11 and the inner wall of the first groove 9 during the engagement process, so as to facilitate the engagement between the first connector and the first groove 3.

[0054] In one possible implementation, the puncture needle further includes a first connector 19, which is fixed to one end of the puncture needle body 1 and communicates with it. The needle handle 2 is fixed to the first connector 19. The first connector 19 can be, but is not limited to, a two-way connector, that is, the first connector 19 has two communicating interfaces. The puncture needle body 1 communicates with one interface of the first connector 19, and one end of the aforementioned flexible tube 28 or one end of the aforementioned first flexible tube 20 communicates with the other interface of the first connector 19, so that the aforementioned flexible tube 28 or the aforementioned first flexible tube 20 communicates with the puncture needle body 1. The first connectors 19 can be bonded together using adhesives such as UV-cured adhesive or medical acrylic adhesive. The following tubing 28 or the following first tubing 20 can be bonded to the first connectors 19 using adhesives (such as cyclohexanone), so that the puncture needle body 1 and the following tubing 28 or the following first tubing 20 are both fixedly connected to the first connectors 19. The needle handle 2 is fixed to the first connector 19. Specifically, the bottom of the needle handle 2 is provided with an arc surface 26, which can fit tightly against the outer periphery of the first connector 19. The needle handle 2 and the first connector 19 are connected by adhesive. The needle handle 2 and the first connector 19 can also be integrally molded by injection molding.

[0055] In one possible implementation, the first fixing body 6 is located on the side of the needle handle 2 opposite to the puncture needle body 1. The extension direction of the first fixing body 6 is perpendicular to the length direction of the puncture needle body 1. The first fixing body 6 has protrusions 15 at both ends in its extension direction, and a third groove 16 is formed on the opposite side of the two protrusions 15. The third groove 16 corresponds one-to-one with the first wristband 7. The first wristband 7 can be, but is not limited to, a thin plate assembly. The thin plate assembly includes a thin spring steel plate and medical rubber wrapped around the spring steel plate. When the spring steel plate is not triggered, it is a straight plate. When the non-fixed end of the spring steel plate is pressed down, it will cause the entire spring steel plate to curl up. It is fixed to the corresponding third groove 16 by the two fixed ends respectively. After the spring steel plate is slightly pressed down, the two movable ends can move towards each other on the side of the needle handle 2 away from the first fixed body 6. The connection between the fixed end of the first wrist strap 7 and the third groove 16 can be, but is not limited to, adhesive. The spring steel plate curling force clamps the arm with a preset force, so that the first connecting body curls up and wraps around the arm.

[0056] Please see Figure 8 and Figure 9In one possible implementation, there are two first fixing members, and the two first fixing members are spaced apart along the extension direction of the puncture needle body 1. The first fixing body 6 of the two first fixing members is located on the side of the needle handle 2 away from the puncture needle body 1, and a fourth groove 17 is opened on the opposite side of the two first fixing bodies 6. The fixing end of the first wrist strap 7 is connected to a rotating shaft 18. For example, the fixing end can be sleeved on the outer periphery of the rotating shaft 18, or the fixing end can be glued to the rotating shaft 18. When not in use, the first connecting body is wrapped around the rotating shaft 18. The two ends of the rotating shaft 18 are used to engage the corresponding fourth grooves 17. The length of the rotating shaft 18 on its own axis is greater than the distance between the two fourth grooves 17 to prevent the fixing end from detaching from the rotating shaft 18. The outer surface of the first wristband 7 is provided with a first adhesive piece, and the inner surface of the movable end is provided with a second adhesive piece. One of the first adhesive piece and the second adhesive piece is designated as a sub-adhesive piece, and the other is designated as a female adhesive piece. By setting the sub-adhesive piece and the female adhesive piece on different sides of the first wristband 7, the movable end can move around the side of the needle handle 2 away from the first fixing body 6 and towards the fixing end after the rotating shaft 18 is pulled out, and the first adhesive piece and the second adhesive piece are bonded together. This is used to wrap around and wrap the arm after the first connector is pulled out. The relative position of the first adhesive piece and the second adhesive piece can be adjusted according to the thickness of the arm to ensure effective fixation of the puncture needle body 1. This method is safer than the current fixation method using medical tape, and the method of use is simple, without the need for repeated tearing and bonding of medical tape.

[0057] Please see Figure 1 , Figure 7 ,and Figure 10 A puncture device includes a puncture needle as described above, and further includes a flexible tube 28 and a third connector 25. One end of the flexible tube 28 is connected to the puncture needle, and a second connector 21 is provided on the flexible tube 28. A second wrist strap fixing device is detachably connected to the second connector 21. One end of the third connector 25 is connected to the other end of the flexible tube 28. The second connector 21 can be fixed to the flexible tube 28 (as shown in the attached diagram). Figure 10 On the outer surface of the second connector 21 (as shown in the figure), a first groove is provided, and the second wristband fixing device is detachably connected to the first groove.

[0058] Alternatively, hose 28 can be configured as a segmented type (as shown in the attached document). Figure 1As shown in the figure, for example, hose 28 includes a first hose 20 and a second hose 22, a second connector 21 connects the first hose 20 and the second hose 22, the second connector 21 is provided with a first groove, and a second wrist strap fixing device is detachably connected to the first groove. The second connector 21 is fixed to the other end of the first hose 20 and connected to the first hose 20. The second connector 21 can be, but is not limited to, a two-way connector, that is, the second connector 21 has two connected interfaces. One interface of the second connector 21 is used to connect to the other end of the first hose 20, and the other interface of the second connector 21 is used to connect to one end of the second hose 22 and to fix the second hose 22, so that the first hose 20 and the second hose 22 are connected to extend the blood flow path. The second hose 22 is connected to the extracorporeal circulation blood circuit connector through the third connector 25 set at the other end of the second hose 22, so that the second hose 22 is connected to the extracorporeal circulation arteriovenous circuit for blood to enter the filter for hemodialysis. The second hose 22 is provided with a clamp 24 for clamping the second hose 22 during the puncture of the puncture needle body 1 to restrict the flow of blood. The second connector 21 is provided with a first groove.

[0059] The second wristband fixing device is the same as or similar to the first wristband fixing device. The second wristband fixing device also includes a second fixing member and a second wristband 23. The second fixing member includes a second connecting member and a second fixing body connected to the second connecting member. The second connecting member is used to engage with the first groove, so that the second fixing member is detachably connected to the second connector 21. The second wristband 23 includes a second fixed end, a second movable end, and a second connecting body connected to the second fixed end and the second movable end. The second fixed end is fixed to the second fixing body, and the second movable end can drive the second connecting body to move, so that the second wristband 23 wraps around the arm and is fixed relative to the arm. The difference between the second wristband fixing device and the first wristband fixing device is only that the first fixing member is engaged in the first groove 3 on the needle handle 2, while the second fixing member is engaged in the first groove of the second connector 21. It should be noted that the second connector 21 can also be provided with a plate structure similar to the needle handle 2, and the first groove is opened on the side of the plate structure away from the puncture needle body 1.

[0060] After the first wristband 7 is wrapped around the arm and fixed relative to the arm to fix the puncture needle body 1 relative to the arm, the second wristband 23 can be wrapped around the arm at different positions to fix the second connector 21 relative to the arm. This makes the positions of the first tubing 20 and the second tubing 22 connected to the second connector 21 relatively stable. Compared with the existing technology that uses a combination of adhesive bandages and multiple medical tapes, wrapping and tightly wrapping the arm with the first wristband 7 and the second wristband 23 simplifies the fixation operation and improves the fixation effect on the puncture needle body 1 and the first tubing 20 and the second tubing 22 connected to the second connector 21.

[0061] Furthermore, the first groove includes a second opening and a second slot connected to the second opening and located on the second opening away from the end face of the first groove. The inner wall of the second slot is provided with the second groove. The second connector includes a second support connected to the second fixed body and a second protrusion protruding from the side of the second support. At least one of the second support and the second protrusion can be deformed and restored, so that the second support slides into the second slot along the second opening and the second protrusion engages with the second groove, thereby realizing that the second connector engages with the first groove.

[0062] In one possible implementation, the second opening has a constricted shape extending toward the second slot. The second protrusion has a second abutment surface and a second contact surface. The second abutment surface is located on the side of the second protrusion facing the second fixing body, and the second contact surface is located on the side of the second protrusion away from the second fixing body. The second contact surface can fit against the inner wall of the second opening to allow the second connector to slide into the second slot along the second opening. The second abutment surface can abut against the side of the second groove near the second opening to prevent the second protrusion from disengaging from the second groove in the opposite direction. The second abutment surface can be configured as a plane perpendicular to the axis of the first groove to improve the contact effect between the second abutment surface and the second groove, further preventing the second protrusion from disengaging from the second groove in the opposite direction.

[0063] In one possible implementation, the same second fastener includes two second connectors, which are spaced apart on the same side of the second fastener to form a clearance space between the two second connectors for the two second supports to move toward each other, and the second protrusion is located on the opposite side of the two second supports; the same second slot includes two symmetrically arranged second grooves adapted to the second protrusion for engaging the two second protrusions with the second grooves.

[0064] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0065] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0066] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A puncture needle, characterized in that, include: Puncture needle body (1); The needle handle (2) is located on the outer periphery of the puncture needle body (1) and is fixed relative to the puncture needle body (1); The first wrist strap fixing device includes a first fixing member and a first wrist strap (7); The first fixing member includes a first connector and a first fixing body (6) connected to the first connector, and the first connector is detachably connected to the needle handle (2). The first wristband (7) includes a fixed end, a movable end, and a first connector connected to the fixed end and the movable end. The fixed end is fixed to the first fixed body (6), and the movable end can drive the first connector to move, so that the first wristband (7) wraps around the arm and is fixed relative to the arm.

2. The puncture needle according to claim 1, characterized in that, The needle handle (2) is provided with a first groove (3), the first groove (3) includes a first opening (8) and a first slot (9) connected to the first opening (8) and located on the end face of the first opening (8) away from the first groove (3), and a second groove (10) is provided on the inner wall of the first slot (9). The first connector includes a first support portion (11) connected to the first fixing body (6) and a first protrusion portion (12) protruding from the side of the first support portion (11). At least one of the first support portion (11) and the first protrusion portion (12) can be deformed and restored, so that the first support portion (11) slides into the first slot portion (9) along the first opening portion (8) and the first protrusion portion (12) is engaged with the second groove body (10).

3. The puncture needle according to claim 2, characterized in that, The first opening (8) has a constricted structure extending toward the first slot (9). The first protrusion (12) is provided with a first abutting surface (13) and a first fitting surface (14). The first abutting surface (13) is located on the side of the first protrusion (12) facing the first fixing body (6), and the first fitting surface (14) is located on the side of the first protrusion (12) away from the first fixing body (6). The first fitting surface (14) can fit against the inner wall of the first opening (8) so that the first connector can slide into the first slot (9) along the first opening (8). The first abutting surface (13) can abut against the side of the second groove (10) near the first opening (8) so as to restrict the first protrusion (12) from disengaging from the second groove (10).

4. The puncture needle according to claim 3, characterized in that, The same first fastener includes two first connectors, which are spaced apart on the same side of the first fastener (6) to form a clearance space between the two first connectors for the two first support portions (11) to move toward each other, and the first protrusion (12) is located on the opposite side of the two first support portions (11). The same first slot portion (9) includes two symmetrically arranged second slots (10) adapted to the first protrusion (12) for engaging the two first protrusions (12).

5. The puncture needle according to claim 1, characterized in that, It also includes a first connector (19), which is fixed to one end of the puncture needle body (1) and connected to the puncture needle body (1), and the needle handle (2) is fixed to the first connector (19).

6. The puncture needle according to any one of claims 1-5, characterized in that, The first fixing body (6) is located on the side of the needle handle (2) away from the puncture needle body (1). The extension direction of the first fixing body (6) is perpendicular to the length direction of the puncture needle body (1). The first fixing body (6) has protrusions (15) at both ends in its extension direction. The two protrusions (15) are respectively provided with a third groove (16) on the side away from each other. The third groove (16) corresponds to the first wristband (7). The two fixing ends are respectively fixed to the corresponding third groove (16). The two movable ends can move towards each other on the side of the needle handle (2) away from the first fixing body (6) to make the first connecting body curl up and wrap around and wrap the arm.

7. The puncture needle according to any one of claims 1-5, characterized in that, There are two first fixing members, and the two first fixing members are spaced apart along the extension direction of the puncture needle body (1). The first fixing body (6) of the two first fixing members is located on the side of the needle handle (2) away from the puncture needle body (1). A fourth groove (17) is opened on the side of the two first fixing bodies (6) facing each other. The fixed end is connected to a rotating shaft (18), and the two ends of the rotating shaft (18) are used to engage with the corresponding fourth groove (17) to restrict the fixed end from detaching from the rotating shaft (18). The outer surface of the first wristband (7) is provided with a first adhesive, and the inner surface of the movable end is provided with a second adhesive. The movable end can move around the needle handle (2) away from the first fixed body (6) toward the fixed end and make the first adhesive and the second adhesive stick together, so that the first connector can be pulled out and wrapped around and wrapped around the arm.

8. A puncture device comprising a puncture needle as described in any one of claims 1-7, characterized in that, The puncture device also includes: A flexible tube (28) is connected at one end to the puncture needle. A second connector (21) is provided on the flexible tube (28). A second wrist strap fixing device is detachably connected to the second connector (21). The third connector (25) is connected at one end to the other end of the hose (28).

9. The puncture device according to claim 8, characterized in that, The second connector (21) is fixed to the outer surface of the hose (28), and the second connector (21) is provided with a first groove. The second wrist strap fixing device is detachably connected to the first groove.

10. The puncture device according to claim 8, characterized in that, The hose (28) includes a first hose (20) and a second hose (22), the second connector (21) connects the first hose (20) and the second hose (22), the second connector (21) is provided with a first groove, and the second wrist strap fixing device is detachably connected to the first groove.

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