Abdominal cavity puncture needle

Abstract

The abdominal cavity puncture needle comprises a trocar, a needle rod is fixed to the trocar, the trocar, the needle rod, a needle end and a needle head form a complete puncture needle, the needle head extends into the needle rod, the needle end abuts against the trocar, the needle rod and the needle head penetrate into the body of a patient together, then the needle head is pulled out of the needle rod, a cavity of the trocar is exposed, and the trocar can be connected with an injector. Liquid in the body of a patient is extracted through the needle rod. According to the trocar, the trocar is limited by the circular ring and the bent rod and is kept stable, the trocar can be kept stable even if a medical worker loses holding the trocar, and even if the trocar is subjected to accidental pressure, the trocar cannot penetrate into the deeper part of the body of a patient under the action of the circular ring; therefore, the puncture needle can work more stably and effectively, pressure on medical staff is relieved, the medical staff does not need to hold the trocar needle all the time, and the situation that the needle rod rotates along with the trocar needle, and consequently a patient is injured is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of puncture needles, in particular to an abdominal puncture needle. Background Art

[0002] The abdominal puncture needle is divided into a trocar and a puncture needle. The trocar and the puncture needle are inserted into the body cavity together, and then the puncture needle is pulled out. The trocar can be used to extract body fluids.

[0003] However, after the trocar and the puncture needle are inserted into the abdominal cavity, the doctor needs to control the trocar at all times. Since the needle shaft of the trocar is relatively sharp, once the doctor's hand shakes and causes the trocar to shake together, the needle shaft of the trocar will move inside the patient's body, thereby accidentally injuring the patient's organs, which is quite dangerous. However, after the trocar is inserted into the patient's body, the doctor must proceed to the next step, such as connecting the head of the syringe to the trocar and extracting the fluid in the patient's body through the syringe, which will undoubtedly increase the probability of the doctor's hand shaking.

[0004] Therefore, the traditional puncture needle can be improved so that it can avoid the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a abdominal puncture needle in order to solve the above problems.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A abdominal puncture needle, comprising: Trocar, a needle bar is fixed on the trocar, and the trocar, the needle bar, the needle end and the needle head form a complete puncture needle, the needle head is inserted into the needle bar, the needle end abuts against the trocar, the needle bar and the needle head are inserted into the patient's body together, and then the needle head is pulled out of the needle bar, the cavity of the trocar is exposed, and it can be connected to the syringe to extract the liquid in the patient's body through the needle bar; A bottom block, the trocar is fixed with the bottom block, the bottom block and the collar are connected by threads, and the needle rod passes through the collar, when the inner bottom wall of the collar abuts against the bottom of the bottom block, the gap between the upper surface of the collar and the trocar is an annular groove, the annular groove is rotatably connected with the rotating ring, and a retaining ring is fixed on the rotating ring; A circular ring, on which a fixed ring is fixed, and the fixed ring is connected to the outer wall of the rotating ring through threads, the circular ring is fixed to the skin through a connecting piece, and the trocar remains stable under the action of a limiting piece.

[0007] Preferably, the connecting member includes a top block fixed at the bottom of the circular ring, and a screw groove is provided on the top block, the screw groove and the screw block are connected by threads, a round ball is rotatably connected inside the screw block, and a vertical rod is fixed on the round ball, a disc is fixed at the end of the vertical rod, a slot is provided at the bottom of the disc, and the slot is engaged with the block, the block is made of elastic material, so the block and the slot can be fixed by engagement, a rubber block is fixed at the bottom of the block, the bottom of the rubber block is tape, and the tape is attached to the release paper, and the release paper and tape can be torn off for normal use.

[0008] Preferably, the limiting member includes a side groove formed on the side wall of the trocar, and the side groove is engaged with the bent rod, a fixing rod is fixed to the end of the bent rod, and a cross plate is fixed to the fixing rod, a screw is connected to the cross plate by threads, and an end block is fixed to the bottom of the screw, a circular groove matched with the end block is formed on the circular ring, and a matching member for limiting the screw is also provided on the bent rod.

[0009] Preferably, the matching part includes a slide plate slidably connected to the fixed rod, and a push rod is fixed on the slide plate, the screw rod is slidably connected to the slide plate, and a connecting disk is fixed at the top of the screw rod, and an opening adapted to the push rod is opened on the connecting disk.

[0010] Preferably, the openings are centered on the center of the connecting disk and are distributed at equal angles around the circumference.

[0011] Preferably, a spring is sleeved on the fixing rod, one end of the spring is fixedly connected to the cross plate, and the other end is fixedly connected to the bottom of the slide plate, and the elastic force of the spring pushes the slide plate to move upward.

[0012] Preferably, a connecting groove connected to the side groove is formed on the outer wall of the trocar, and a connecting block engaged with the connecting groove is fixed on the bent rod.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The present application maintains its own stability by limiting the trocar by the ring and the bent rod. Even if the medical staff loses the grip of the trocar, the trocar can maintain its own stability. Even if the trocar is subjected to unexpected pressure, the trocar cannot penetrate deeper into the patient's body under the action of the ring. Therefore, the puncture needle can perform its work more stably and effectively, reducing the pressure on medical staff. Medical staff do not need to hold the trocar all the time, effectively avoiding the situation where the needle rod rotates with the trocar and causes harm to the patient.

[0014] 2. The present application uses multiple discs at the bottom of the ring to support the ring, and the card blocks, rubber blocks and tapes at the bottom of the discs are disposable structures, which effectively avoids the effect that the tape is not sticky enough and cannot stick to the patient's skin. The structures such as the ring and the rotating ring are non-disposable structures, so they can be used for a long time and only need to be disinfected and sterilized before use, which effectively reduces the use cost of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the overall structure of a puncture needle provided in an embodiment of the present invention is shown; Figure 2 It shows a schematic diagram of the structure of a trocar part provided in an embodiment of the present invention; Figure 3 It shows a schematic diagram of the structure of the trocar and needle part provided in an embodiment of the present invention; Figure 4 It shows a schematic diagram of the structure of a circular ring portion provided in an embodiment of the present invention; Figure 5 It shows a schematic diagram of the structure of the bending rod part provided in an embodiment of the present invention; Figure 6 A schematic diagram of a cross-sectional structure of a circular ring portion provided in an embodiment of the present invention is shown; Figure 7 An enlarged schematic diagram of structure A provided according to an embodiment of the present invention is shown; Legend: 1. Needle sleeve; 2. Needle rod; 3. Bottom block; 4. Needle end; 5. Needle head; 6. Ring; 7. Annular groove; 8. Rotating ring; 9. Stop ring; 10. Circular ring; 11. Fixed ring; 12. Ejector block; 13. Screw groove; 14. Screw block; 15. Disc; 16. Vertical rod; 17. Round ball; 18. Slot; 19. Rubber block; 20. Slot; 21. Rubber tape; 22. Circular groove; 23. Side groove; 24. Connecting groove; 25. Bending rod; 26. Connecting block; 27. Fixed rod; 28. Horizontal plate; 29. ​​Slide plate; 30. Screw rod; 31. Connecting disc; 32. Opening; 33. Ejector rod; 34. End block; 35. Spring. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1-Figure 7 , the present invention provides a technical solution: A abdominal puncture needle, comprising: A trocar 1 is provided with a needle shaft 2 fixed thereon, and the trocar 1 and the needle shaft 2 together with the needle end 4 and the needle head 5 form a complete puncture needle, the needle head 5 is inserted into the needle shaft 2, the needle end 4 abuts against the trocar 1, the needle shaft 2 and the needle head 5 are inserted into the patient's body together, and then the needle head 5 is pulled out of the needle shaft 2, the cavity of the trocar 1 is exposed, and can be connected to a syringe to extract liquid from the patient's body through the needle shaft 2; Bottom block 3, the bottom block 3 is fixed on the trocar 1, the bottom block 3 and the collar 6 are connected by threads, and the needle rod 2 passes through the collar 6, when the inner bottom wall of the collar 6 abuts against the bottom of the bottom block 3, the gap between the upper surface of the collar 6 and the trocar 1 is an annular groove 7, the annular groove 7 is rotatably connected with the rotating ring 8, and a retaining ring 9 is fixed on the rotating ring 8; The circular ring 10 has a fixed ring 11 fixed thereon, and the fixed ring 11 is connected to the outer wall of the rotating ring 8 through threads, the circular ring 10 is fixed to the skin through a connector, and the trocar 1 remains stable under the action of a limiter.

[0018] Specifically, Figure 7 As shown, the connector includes a top block 12 fixed at the bottom of the ring 10, and a screw groove 13 is provided on the top block 12, the screw groove 13 is connected to the screw block 14 by threads, a ball 17 is rotatably connected in the screw block 14, and a vertical rod 16 is fixed on the ball 17, a disc 15 is fixed at the end of the vertical rod 16, a slot 18 is provided at the bottom of the disc 15, and the slot 18 is engaged with the block 20, the block 20 is made of elastic material, so the block 20 and the slot 18 can be fixed by engagement, a rubber block 19 is fixed at the bottom of the block 20, the bottom of the rubber block 19 is a tape 21, and the tape 21 is attached to the release paper, the release paper is torn off, and the tape 21 can be used normally. The block 20, the rubber block 19 and the tape 21 are an integrated structure, and are disposable structures. After use, the viscosity of the tape 21 will decrease, and it needs to be replaced with a new one.

[0019] A plurality of top blocks 12 are fixed to the bottom of the ring 10, so a plurality of discs 15 are also provided at the bottom of the ring 10. The discs 15 can rotate according to the curvature of the patient's body so that the discs 15 can contact the patient's skin, and with the support of the plurality of discs 15, the center of the ring 10 can be aligned with the puncture site.

[0020] Specifically, Figure 2 and Figure 5As shown, the limiting member includes a side groove 23 formed on the side wall of the trocar 1, and the side groove 23 is engaged with the curved rod 25, a fixing rod 27 is fixed at the end of the curved rod 25, and a horizontal plate 28 is fixed on the fixing rod 27, a screw 30 is connected to the horizontal plate 28 by threads, and an end block 34 is fixed to the bottom of the screw 30, a circular groove 22 adapted to the end block 34 is formed on the circular ring 10, and a matching member for limiting the screw 30 is also provided on the curved rod 25. A connecting groove 24 connected to the side groove 23 is formed on the outer wall of the trocar 1, and a connecting block 26 engaged with the connecting groove 24 is fixed on the curved rod 25. Under the restriction of the curved rod 25, the trocar 1 can be restricted, so that the trocar 1 cannot be rotated under force, and the needle rod 2 cannot rotate either, which effectively prevents the needle rod 2 from rotating and damaging the organs in the patient's body.

[0021] Specifically, Figure 5 As shown, the matching part includes a slide plate 29 slidably connected to the fixed rod 27, and a push rod 33 is fixed on the slide plate 29, a screw rod 30 is slidably connected to the slide plate 29, and a connecting disk 31 is fixed at the top of the screw rod 30, and an opening 32 adapted to the push rod 33 is opened on the connecting disk 31. The opening 32 takes the center of the circle of the connecting disk 31 as the axis, and there are multiple openings 32 distributed at equal angles on the circumference. A spring 35 is sleeved on the fixed rod 27, and one end of the spring 35 is fixedly connected to the cross plate 28, and the other end is fixedly connected to the bottom of the slide plate 29. The elastic force of the spring 35 pushes the slide plate 29 to move upward. Under the cooperation of the slide plate 29 and the push rod 33, the screw rod 30 can be restricted, so that the screw rod 30 cannot be rotated under force, so that the position of the bent rod 25 is also fixed.

[0022] In summary, the present embodiment provides a method of first determining the puncture site of the patient, then aligning the ring 10 with the puncture site, and rotating the screw block 14 to adjust the position of each disk 15, so that each disk 15 can contact the patient's skin, and the center of the ring 10 can face the puncture site. The release paper at the bottom of the tape 21 is torn off, so that the tape 21 can be adhered to the patient's skin.

[0023] That is, the fixation of the circular ring 10 to the skin is completed, and then the rotating ring 8 can be put on the bottom block 3 on the trocar 1, and the ring 6 and the bottom block 3 are connected by threads until the inner bottom wall of the ring 6 abuts against the bottom of the bottom block 3. At this time, the rotating ring 8 is located in the annular groove 7 and is rotatably connected to the bottom block 3.

[0024] The needle shaft 2 and the needle head 5 of the needle end 4 of the trocar 1 are inserted into the correct position in the patient's body through the circular ring 10. By rotating the retaining ring 9, the rotating ring 8 is connected with the fixed ring 11 through threads until the needle shaft 2 and the needle head 5 are inserted into the patient's body to a predetermined depth.

[0025] At this time, the trocar 1 can maintain its own stability under the action of the ring 10, but the trocar 1 will rotate when subjected to force, so the medical staff can determine whether to install a structure such as a curved rod 25 according to their own needs to achieve the restriction of the trocar 1, so that the trocar 1 cannot rotate under force. After the trocar 1 is inserted into the correct position, the needle 5 and the needle end 4 can be withdrawn. At this time, the medical staff can use a hose or other tool to connect the syringe to the trocar 1, and the liquid in the patient's body can be extracted through the needle rod 2 during the process of pulling the syringe.

[0026] When the bent rod 25 needs to be installed: The end of the curved rod 25 is engaged with the side groove 23 of the side wall of the trocar 1, and the connecting block 26 is engaged with the connecting groove 24, and the end block 34 at the other end of the curved rod 25 is aligned with the circular groove 22. The slide plate 29 is pressed downward to make the push rod 33 on the slide plate 29 disengage from the opening 32, and the connecting disk 31 can be rotated to make the screw rod 30 move downward during the rotation until the end block 34 extends into the circular groove 22. At this time, the downward pressure on the slide plate 29 is released, and under the elastic force of the spring 35, the slide plate 29 moves upward, and the push rod 33 on the slide plate 29 extends into the opening 32 opened on the connecting disk 31.

[0027] At this time, the curved rod 25 is fixed as a whole with the trocar 1 and the circular ring 10. The trocar 1 is restricted by the circular ring 10 and the curved rod 25 and maintains its own stability. Even if the medical staff loses the grip of the trocar 1, the trocar 1 can maintain its own stability. Even if the trocar 1 is subjected to unexpected pressure, under the action of the circular ring 10, the trocar 1 cannot penetrate deeper into the patient's body.

[0028] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A peritoneal puncture needle, characterized in that: include: A trocar (1), wherein a needle rod (2) is fixed on the trocar (1), and the trocar (1) and the needle rod (2) together with the needle end (4) and the needle head (5) form a complete puncture needle, the needle head (5) is inserted into the needle rod (2), the needle end (4) abuts against the trocar (1), the needle rod (2) and the needle head (5) are inserted into the patient's body together, and then the needle head (5) is pulled out of the needle rod (2), the cavity of the trocar (1) is exposed, and can be connected to a syringe to extract liquid from the patient's body through the needle rod (2); A bottom block (3), the bottom block (3) is fixed on the trocar (1), the bottom block (3) and the collar (6) are connected by threads, and the needle rod (2) passes through the collar (6), when the inner bottom wall of the collar (6) abuts against the bottom of the bottom block (3), the gap between the upper surface of the collar (6) and the trocar (1) is an annular groove (7), the annular groove (7) is rotatably connected to the rotating ring (8), and a retaining ring (9) is fixed on the rotating ring (8); A circular ring (10) is fixed with a fixing ring (11), and the fixing ring (11) is connected to the outer wall of the rotating ring (8) via a thread, the circular ring (10) is fixed to the skin via a connecting piece, and the trocar (1) is kept stable under the action of a limiting piece.

2. A peritoneal puncture needle according to claim 1, characterized in that: The connecting member comprises a top block (12) fixed at the bottom of the circular ring (10), and a screw groove (13) is provided on the top block (12), the screw groove (13) and the screw block (14) are connected by threads, a round ball (17) is rotatably connected inside the screw block (14), and a vertical rod (16) is fixed on the round ball (17), a round disc (15) is fixed at the end of the vertical rod (16), a clamping groove (18) is provided at the bottom of the round disc (15), and the clamping groove (18) is clamped with the clamping block (20), the clamping block (20) is made of elastic material, so the clamping block (20) and the clamping groove (18) can be fixed by clamping, a rubber block (19) is fixed at the bottom of the rubber block (20), the bottom of the rubber block (19) is a tape (21), and the tape (21) is in contact with the release paper, and the release paper tape (21) can be torn off for normal use.

3. The abdominal puncture needle according to claim 1, characterized in that: The limiting member comprises a side groove (23) formed on the side wall of the trocar (1), and the side groove (23) is engaged with a bent rod (25), a fixing rod (27) is fixed to the end of the bent rod (25), a transverse plate (28) is fixed to the fixing rod (27), a screw rod (30) is connected to the transverse plate (28) by threading, and an end block (34) is fixed to the bottom of the screw rod (30), a circular groove (22) matched with the end block (34) is formed on the circular ring (10), and a matching member for limiting the screw rod (30) is also provided on the bent rod (25).

4. A peritoneal puncture needle according to claim 3, characterized in that: The matching component comprises a slide plate (29) slidably connected to the fixed rod (27), a push rod (33) being fixed to the slide plate (29), the screw rod (30) being slidably connected to the slide plate (29), a connecting plate (31) being fixed at the top end of the screw rod (30), and an opening (32) matching the push rod (33) being formed on the connecting plate (31).

5. The abdominal puncture needle according to claim 4, characterized in that: The openings (32) are arranged with the center of the connection disk (31) as the axis, and are distributed at equal angles around the circumference.

6. The abdominal puncture needle according to claim 4, characterized in that: The fixing rod (27) is sleeved with a spring (35), one end of the spring (35) is fixedly connected to the transverse plate (28), and the other end is fixedly connected to the bottom of the slide plate (29), and the elastic force of the spring (35) pushes the slide plate (29) to move upward.

7. The abdominal puncture needle according to claim 3, characterized in that: A connecting groove (24) connected to the side groove (23) is formed on the outer wall of the trocar (1), and a connecting block (26) engaged with the connecting groove (24) is fixed on the bent rod (25).

Images