Puncture catheter needle assembly suitable for continuous nerve block

Abstract

The invention discloses a puncture catheter needle assembly suitable for continuous nerve blocking, and belongs to the technical field of medical appliances, the puncture catheter needle assembly suitable for continuous nerve blocking comprises an outer tube, one end in the outer tube is fixedly connected with a sleeve, and one end of the outer tube is fixedly connected with a connecting tube; and a fixed pipe nozzle is fixedly connected into the connecting pipe. By designing the outer tube, the two tube sheaths, the movable tube nozzles and the limiting ring, the structure can be used for short-term nerve block treatment and can also be used for long-term nerve block treatment, functionality is high, during short-term nerve block treatment, the whole catheter assembly does not need to be detached, only a puncture needle needs to be inserted into the periphery of a nerve, and liquid medicine is input; during continuous nerve block treatment, the polyurethane catheter needs to be inserted into the periphery of a nerve, the puncture needle needs to be detached, then liquid medicine is input, treatment is achieved, the structure is convenient and rapid to detach, and pain of a patient is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of medical instruments, and in particular relates to a puncture catheter needle assembly suitable for continuous nerve block. Background Art

[0002] Continuous nerve block is a local anesthesia technique that produces a long-term anesthetic effect by continuously injecting anesthetic drugs around the nerves. This technique usually uses a puncture catheter needle assembly to slowly and continuously inject anesthetic drugs into the nerve area, thereby blocking the conduction of the nerves and achieving analgesic or anesthesia effects. The puncture catheter needle assembly includes a series of tools for puncture and catheter insertion. Its main purpose is to assist doctors in safely and effectively completing the catheter insertion process when the catheter needs to be inserted into the body. The assembly is also used in a variety of medical operations such as vascular access insertion, anesthesia, dialysis, and catheterization. Through precise puncture and intubation, it can effectively reduce the discomfort of patients during medical operations.

[0003] In existing nerve block treatment, drugs are usually delivered directly into the periphery of the nerve through a puncture needle. Although it is possible to block nerve conduction, the puncture needle may puncture the nerve and cause nerve damage during continuous nerve block, and thus it is impossible to continuously block the deep nerves, resulting in poor treatment effect. In addition, the structure of the existing puncture catheter needle assembly is relatively old-fashioned, and it is cumbersome to disassemble and assemble. During the disassembly process, it may cause pain to the patient, affecting the treatment effect. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a puncture catheter needle assembly suitable for continuous nerve block.

[0005] The technical solution adopted to solve the above technical problems is: a puncture catheter needle assembly suitable for continuous nerve block, comprising an outer tube, one end of the outer tube is fixedly connected to a sleeve, and one end of the outer tube is fixedly connected to a connecting tube; A fixed nozzle is fixedly connected inside the connecting tube, one end of the fixed nozzle is fixedly connected to a puncture needle, and two sheaths are arranged outside the other end of the outer tube. In the assembled state, the two sheaths are combined; A movable nozzle is provided at one end of the outer wall of the sleeve, a polyurethane catheter is fixedly connected to one end of the movable nozzle, an anti-reverse tube is fixedly connected inside the movable nozzle, and a limiting ring is provided at one end of the outer wall of the movable nozzle.

[0006] Furthermore, the other end of the outer wall of the outer tube is fixedly connected with an anti-slip sleeve, one end of the outer wall of the outer tube is provided with a limiting hole, the top end of the outer wall of the outer tube is provided with a sliding hole, the limiting hole is connected to the sliding hole, the other end of the outer tube is fixedly connected with two clamping blocks, the front and rear ends of the outer wall of the outer tube are provided with limiting grooves, the front and rear ends of the outer wall of the outer tube and the positions close to the anti-slip sleeve are fixedly connected with first spring plates, and one end of the two first spring plates is fixedly connected with an extrusion block.

[0007] Through the above technical scheme, when the patient is given nerve block treatment, the anti-slip sleeve can be held and pushed by hand, thereby pushing the outer tube, so that the outer tube drives the two tube sheaths to move, and at the same time the outer tube is fixedly connected to the connecting tube, and a puncture needle is installed in the connecting tube, which drives the puncture needle to be inserted around the patient's nerve and injects drugs to achieve treatment. The limiting hole prevents the limiting ring assembly from sliding, and the sliding hole is used for the movement of the limiting ring assembly, thereby driving the entire movable nozzle to move, which is convenient for drainage treatment of deep nerves. After the puncture needle drives the polyurethane catheter to be inserted around the nerve, when the puncture needle needs to be removed, the outer tube is pulled toward the outer end, thereby driving the puncture needle and the polyurethane catheter to separate, so that the polyurethane catheter is around the nerve, which is convenient for introducing drug treatment. When the outer tube needs to be removed, the two first spring plates are squeezed at the same time, thereby squeezing the two squeezing blocks, which is convenient for releasing the limiting connection between the outer tube and the two tube sheaths, and realizing quick disassembly.

[0008] Furthermore, one end of the outer wall of the connecting pipe is provided with an external thread.

[0009] Through the above technical solution, when short-term nerve block treatment is required, medical staff directly injects the drug into the puncture needle through the fixed nozzle, and then injects it into the area around the inserted nerve to achieve treatment. During the injection, the external infusion tube is inserted into the fixed nozzle, and is threadedly connected to the external thread through the fixed sleeve, and the external infusion tube is connected and fixed to the connecting tube, so that the drug can be stably injected into the fixed nozzle.

[0010] Furthermore, the bottoms of the two sheaths are fixedly connected with auxiliary plates, the centers of the outer walls of the two sheaths are fixedly connected with fixing ears, the two fixing ears are provided with slots, one side of the outer walls of the two sheaths are fixedly connected with second spring plates, one ends of the two second spring plates are fixedly connected with protrusions, the tops of the two sheaths are provided with grooves, the inner bottom end of one of the sheaths is provided with an installation groove, the installation groove is fixedly connected with a third spring plate, the front end of the third spring plate is fixedly connected with a first arc block, the rear end bottom of the other sheath is fixedly connected with a connecting plate, and the rear end of the connecting plate is fixedly connected with a second arc block.

[0011] Through the above technical solution, when the patient is given nerve block treatment, two auxiliary sheets are attached to the patient's skin to provide stability for the two sheaths, so that the puncture needle can be stably inserted around the nerve. When the polyurethane catheter is inserted around the nerve through the movable nozzle, in order to enable the polyurethane catheter to stably deliver the drug, the two sheaths need to be disassembled, the puncture needle is removed, and then the limit ring is removed, and one of the sheaths is directly pulled to achieve disassembly. The medical staff then inserts the external infusion tube into the anti-reverse tube, and delivers the medicine to the polyurethane catheter through one end of the movable nozzle, and finally delivers it to the nerve to achieve treatment.

[0012] Furthermore, in the combined state, the two tube sheaths are inserted into the other end of the outer tube, the two clamping blocks are inserted into the corresponding clamping grooves, the two protrusions are inserted into the corresponding limit grooves, the connecting plate and the second arc block are inserted into the installation groove, and the second arc block is fitted with the first arc block.

[0013] Through the above technical solution, the two card blocks are inserted into the corresponding card slots, which can improve the stability of the two sheaths when they are combined, thereby improving the stability of the puncture needle during the puncture process and reducing the pain to the patient. When removing the outer tube, the two card blocks are separated from the corresponding card slots. When disassembling the two sheaths, one of the sheaths is pulled outward, so that the sheath pulls the connecting plate connected to it, and the connecting plate pulls the second arc block connected to it, so that the second arc block squeezes the first arc block outward and fits with it. Since the first arc block is connected to the third spring plate, the first arc block is forced to move upward, so that the second arc block is separated from the first arc block, and the disassembly of the two sheaths is realized. The structure is simple and the operation is convenient.

[0014] Furthermore, one end of the outer wall of the movable nozzle is fixedly connected to a limiting tube, the inner wall of the limiting tube is slidably connected to the outer wall of the sleeve, and the outer wall of the limiting tube is provided with a plurality of sliding grooves.

[0015] Through the above technical scheme, when the movable nozzle is slidably connected with the sleeve through the limiting tube, it is convenient to drive the movable nozzle to rotate an angle, thereby facilitating the movement of the movable nozzle. Multiple slide grooves are used for the limiting movement of the limiting ring, thereby facilitating the rotation of the limiting tube. During short-term nerve block treatment, the movable nozzle is located in the outer tube. According to the position of the nerve, the movable nozzle can be moved to a designated position so that the polyurethane catheter can be inserted around the designated nerve, thereby delivering the medicine to the designated position to achieve treatment. It has strong functionality and can treat different patients. During continuous nerve block treatment, the movable nozzle needs to be moved into the two sheaths so that the polyurethane catheter can be inserted into the patient's skin at a longer length. When removing the outer tube, the limiting ring is put on the two sheaths to reduce the shaking of the two sheaths, thereby preventing the shaking of the movable nozzle from causing pain to the patient, and at the same time facilitating the quick removal of the puncture needle to improve the treatment efficiency.

[0016] Furthermore, one end of the anti-reverse pipe is fixedly connected to a rubber ball head, an end surface of the rubber ball head is provided with a flow guide hole, and the other end of the anti-reverse pipe is fixedly connected to a flow guide bucket.

[0017] Through the above technical solution, when delivering medicine, the external infusion tube is inserted into the diversion bucket, delivered to the anti-reverse tube, and then delivered to the rubber ball head. The medicine squeezes the rubber ball head, and then the diversion hole is expanded to deliver it to the polyurethane catheter at one end of the movable nozzle. At the same time, when the polyurethane catheter is inserted around the nerve, the rubber ball head has an anti-reverse flow effect, which can prevent the blood around the nerve from flowing back through the polyurethane catheter, thereby ensuring the normal operation of infusion therapy.

[0018] Furthermore, one end of the puncture needle passes through the sleeve, the guide hole and the two sheaths, and the outer wall of the puncture needle is slidably connected to the inner wall of the polyurethane catheter.

[0019] Through the above technical solution, when the puncture needle is removed, the puncture needle is separated from the diversion hole and pulled out of the polyurethane catheter. During short-term nerve block treatment, the external infusion tube is inserted into the fixed nozzle, and the medicine flows to the puncture needle through the fixed nozzle and directly flows to the area around the nerve. When the polyurethane catheter moves a certain distance, the medicine flows to the polyurethane catheter through the puncture needle and then flows to the area around the nerve to achieve treatment.

[0020] Furthermore, a push rack is fixedly connected to the top of the outer wall of the limiting ring, a plurality of limiting strips are fixedly connected to the inner wall of the limiting ring, the plurality of limiting strips are slidably connected to corresponding sliding grooves, and the push rack is located in the limiting hole.

[0021] Through the above technical solution, when pushing the movable nozzle, the push frame is rotated to make the push frame rotate the limit ring, so that the limit ring rotates multiple limit bars, and then the limit tube is rotated, so that the limit tube drives the movable nozzle to rotate. When the rotation is flush with the sliding hole, the push frame is pushed, so that the push frame pushes the limit ring, and then pushes the movable nozzle, pushes the movable nozzle to the specified position, and then inserts the polyurethane catheter into the specified position, which is convenient for delivering the medicine.

[0022] Furthermore, in the assembled state, the push rack slides into the two grooves.

[0023] Through the above technical solution, when the polyurethane catheter needs to be inserted into the patient's skin, the push frame is pushed to drive the movable nozzle to be inserted into the two sheaths. At this time, the push frame is inserted into the two grooves to improve the connectivity of the two sheaths. At this time, the puncture needle is removed and the push frame is continued to be pushed. The polyurethane catheter can be inserted deeper around the nerve. After connecting the external infusion tube, nerve block treatment can be performed continuously.

[0024] The beneficial effects of the present invention are as follows: (1) The present invention designs an outer tube, two sheath movable nozzles and a limit ring. This structure can be used not only for short-term nerve block treatment, but also for long-term nerve block treatment. It has strong functionality. During short-term nerve block treatment, there is no need to disassemble the entire catheter assembly. It is only necessary to insert the puncture needle into the periphery of the nerve and inject the medicine. During continuous nerve block treatment, it is necessary to insert the polyurethane catheter into the periphery of the nerve, remove the puncture needle, and then inject the medicine to achieve treatment. This structure is easy and quick to disassemble and reduces pain for the patient. (2) The present invention designs an anti-reverse tube. When delivering the medicine, the external infusion tube is inserted into the guide bucket and delivered to the polyurethane catheter through the anti-reverse tube and the rubber ball head. At the same time, the rubber ball head has an anti-reverse effect, which can block the blood around the nerve from flowing back through the polyurethane catheter, thereby ensuring the normal operation of the infusion treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is the overall appearance diagram of the present invention; Figure 2 It is the overall front view of the present invention; Figure 3 This is a first-view overall cross-sectional view of the movable nozzle of the present invention before it is pushed; Figure 4 is a second perspective overall cross-sectional view of the movable nozzle of the present invention before being pushed; Figure 5 is an overall cross-sectional view of the movable nozzle of the present invention after being pushed; Figure 6 It is an overall development diagram of the present invention; Figure 7 is a development diagram of the outer tube and the fixed nozzle of the present invention; Figure 8 is a third-angle overall cross-sectional view of the movable nozzle of the present invention before being pushed; Fig. 9 It is an exploded view of two sheaths of the present invention; Fig.10 It is an expanded view of the movable nozzle, the anti-reverse pipe and the limit ring of the present invention; Fig.11 It is a schematic diagram of the structure of the puncture needle and the anti-reverse tube of the present invention; Fig.12 It is a schematic diagram of the structure after the movable nozzle, the anti-reverse pipe and the limit ring of the present invention are pushed; Fig.13 for Figure 8 A partial enlarged view of the middle A; Fig.14 for Figure 4 A partial enlarged view of point B in the middle.

[0026] 1. outer tube; 11. anti-slip sleeve; 12. limiting hole; 13. sliding hole; 14. clamping block; 15. limiting groove; 16. first spring plate; 17. extrusion block; 2. sleeve; 3. connecting tube; 31. external thread; 4. fixed nozzle; 5. puncture needle; 6. sheath; 61. auxiliary plate; 62. fixing ear; 63. clamping groove; 64. second spring plate; 65. protrusion; 66. strip groove; 67. mounting groove; 68. third spring plate; 69. first arc block; 610. connecting plate; 611. second arc block; 7. movable nozzle; 71. limiting tube; 72. slide groove; 8. polyurethane catheter; 9. anti-reverse tube; 91. rubber ball head; 92. guide hole; 93. guide bucket; 10. limiting ring; 101. push rack; 102. limiting strip. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] like Figure 1-Figure 14 As shown, a puncture catheter needle assembly suitable for continuous nerve block in this embodiment includes an outer tube 1, the other end of the outer wall of the outer tube 1 is fixedly connected with an anti-slip sleeve 11, one end of the outer wall of the outer tube 1 is provided with a limiting hole 12, the top of the outer wall of the outer tube 1 is provided with a sliding hole 13, the limiting hole 12 is connected to the sliding hole 13, the other end of the outer tube 1 is fixedly connected with two clamping blocks 14, the front and rear ends of the outer wall of the outer tube 1 are both provided with limiting grooves 15, the front and rear ends of the outer wall of the outer tube 1 and the positions close to the anti-slip sleeve 11 are both fixedly connected with first spring plates 16, one end of the two first spring plates 16 are both fixedly connected with extrusion blocks 17, when the patient is subjected to nerve block treatment, the anti-slip sleeve 11 can be held by hand and pushed, thereby pushing the outer tube 1, so that the outer tube 1 drives the two sheaths 6 to move, and at the same time the outer tube 1 and The connecting tube 3 is fixedly connected, and a puncture needle 5 is installed in the connecting tube 3, which drives the puncture needle 5 to be inserted around the patient's nerve and injects drugs to achieve treatment. The limiting hole 12 prevents the limiting ring 10 assembly from sliding, and the sliding hole 13 is used for the movement of the limiting ring 10 assembly, thereby driving the entire movable nozzle 7 to move, which is convenient for drainage treatment of deep nerves. After the puncture needle 5 drives the polyurethane catheter 8 to be inserted around the nerve, when the puncture needle 5 needs to be removed, the outer tube 1 is pulled toward the outer end, thereby driving the puncture needle 5 to separate from the polyurethane catheter 8, so that the polyurethane catheter 8 is around the nerve, which is convenient for introducing drug treatment. When the outer tube 1 needs to be removed, the two first spring plates 16 are squeezed at the same time, thereby squeezing the two squeezing blocks 17, which is convenient for releasing the limiting connection between the outer tube 1 and the two sheaths 6 to achieve quick disassembly.

[0029] like Figure 1-Figure 7As shown, one end of the outer tube 1 is fixedly connected to a sleeve 2, and one end of the outer tube 1 is fixedly connected to a connecting tube 3. One end of the outer wall of the connecting tube 3 is provided with an external thread 31. When short-term nerve block treatment is required, medical staff directly inputs the drug into the puncture needle 5 through the fixed nozzle 4, thereby inputting the drug into the surrounding area of ​​the inserted nerve to achieve treatment. During the input, the external infusion tube is inserted into the fixed nozzle 4, and is threadedly connected to the external thread 31 through the fixed sleeve, so that the external infusion tube is connected and fixed to the connecting tube 3, so that the drug can be stably input into the fixed nozzle 4.

[0030] like Figure 1-Figure 14As shown, a fixed nozzle 4 is fixedly connected inside the connecting tube 3, one end of the fixed nozzle 4 is fixedly connected to a puncture needle 5, and two sheaths 6 are arranged outside the other end of the outer tube 1. In the assembled state, the two sheaths 6 are combined, and the bottoms of the two sheaths 6 are fixedly connected to auxiliary pieces 61, and the centers of the outer walls of the two sheaths 6 are fixedly connected to fixed ears 62, and the two fixed ears 62 are provided with slots 63, and one side of the outer walls of the two sheaths 6 is fixedly connected to a second spring plate 64, and one end of the two second spring plates 64 is fixedly connected to a protrusion 65, and the tops of the two sheaths 6 are provided with strip grooves 66, and the inner bottom end of one of the sheaths 6 is provided with a mounting groove 67, and the mounting groove 6 7 is fixedly connected with a third spring plate 68, the front end of the third spring plate 68 is fixedly connected with a first arc block 69, the rear end bottom of the other sheath 6 is fixedly connected with a connecting plate 610, the rear end of the connecting plate 610 is fixedly connected with a second arc block 611. When the patient is given nerve block treatment, the two auxiliary sheets 61 are attached to the patient's skin to provide stability for the two sheaths 6, so that the puncture needle 5 can be stably inserted around the nerve. When the polyurethane catheter 8 is inserted around the nerve through the movable nozzle 7, in order to allow the polyurethane catheter 8 to stably deliver drugs, the two sheaths 6 need to be disassembled, the puncture needle 5 is removed, and then the limit ring 10 is removed. Simply pull one of the sheaths 6 to disassemble it, and the medical staff will then insert the external infusion tube into the anti-reverse tube 9, and deliver the medicine to the polyurethane catheter 8 through one end of the movable nozzle 7, and finally deliver it to the periphery of the nerve to achieve treatment. In the combined state, the two sheaths 6 are inserted into the other end of the outer tube 1, the two blocks 14 are inserted into the corresponding slots 63, the two protrusions 65 are inserted into the corresponding limit slots 15, the connecting plate 610 and the second arc block 611 are inserted into the installation slot 67, the second arc block 611 is fitted with the first arc block 69, and the two blocks 14 are inserted into the corresponding slots 63, which can improve the stability of the two sheaths 6 when they are combined, thereby improving the puncture needle 5 During the puncture process, the stability is improved, and the pain to the patient is reduced. When the outer tube 1 is removed, the two clamping blocks 14 are separated from the corresponding clamping grooves 63. When the two sheaths 6 are removed, one of the sheaths 6 is pulled outward, so that the sheath 6 pulls the connecting plate 610 connected thereto, so that the connecting plate 610 pulls the second arc block 611 connected thereto, so that the second arc block 611 presses the first arc block 69 that fits therewith outward. Since the first arc block 69 is connected to the third spring plate 68, the first arc block 69 is forced to move upward, so that the second arc block 611 is separated from the first arc block 69, and the two sheaths 6 are removed. The structure is simple and the operation is convenient.

[0031] like Figure 1-Figure 10As shown, a movable nozzle 7 is provided at one end of the outer wall of the sleeve 2, and one end of the outer wall of the movable nozzle 7 is fixedly connected to a limiting tube 71. The inner wall of the limiting tube 71 is slidably connected to the outer wall of the sleeve 2, and a plurality of slide grooves 72 are provided on the outer wall of the limiting tube 71. When the movable nozzle 7 is slidably connected to the sleeve 2 through the limiting tube 71, it is convenient to drive the movable nozzle 7 to rotate an angle, thereby facilitating the movement of the movable nozzle 7. The plurality of slide grooves 72 are used for the limiting movement of the limiting ring 10, thereby facilitating the rotation of the limiting tube 71. During short-term nerve block treatment, the movable nozzle 7 is located in the outer tube 1, and can be adjusted according to the position of the nerve. Move the movable nozzle 7 to the designated position so that the polyurethane catheter 8 can be inserted around the designated nerve, thereby delivering the medicine to the designated position to achieve treatment. The functionality is strong, so different patients can be treated. During continuous nerve block treatment, the movable nozzle 7 needs to be moved into the two sheaths 6 so that the polyurethane catheter 8 can be inserted into the patient's skin at a longer length. When removing the outer tube 1, the limiting ring 10 is put on the two sheaths 6 to reduce the shaking of the two sheaths 6, thereby preventing the shaking of the movable nozzle 7 from causing pain to the patient, and at the same time, it is convenient to quickly remove the puncture needle 5, thereby improving the treatment efficiency.

[0032] like Figure 1-Figure 11 As shown, one end of the movable nozzle 7 is fixedly connected to a polyurethane catheter 8, an anti-reverse tube 9 is fixedly connected inside the movable nozzle 7, one end of the anti-reverse tube 9 is fixedly connected to a rubber ball head 91, an end surface of the rubber ball head 91 is provided with a flow guide hole 92, and the other end of the anti-reverse tube 9 is fixedly connected to a flow guide bucket 93. When delivering liquid medicine, an external infusion tube is inserted into the flow guide bucket 93, delivered to the anti-reverse tube 9, and then delivered to the rubber ball head 91. The liquid medicine squeezes the rubber ball head 91, and then opens the flow guide hole 92 to deliver to the polyurethane catheter 8 at one end of the movable nozzle 7. At the same time, when the polyurethane catheter 8 is inserted around the nerve, the rubber ball head 91 has an anti-reverse flow effect, which can block the flow of the medicine. The blood around the nerve flows back out through the polyurethane catheter 8 to ensure the normal operation of the infusion treatment. One end of the puncture needle 5 passes through the sleeve 2, the guide hole 92 and the two sheaths 6. The outer wall of the puncture needle 5 is slidably connected with the inner wall of the polyurethane catheter 8. When the puncture needle 5 is removed, the puncture needle 5 is separated from the guide hole 92 and pulled out from the polyurethane catheter 8. During short-term nerve block treatment, the external infusion tube is inserted into the fixed nozzle 4, and the medicine flows to the puncture needle 5 through the fixed nozzle 4 and directly flows to the area around the nerve. When the polyurethane catheter 8 moves a certain distance, the medicine flows to the polyurethane catheter 8 through the puncture needle 5 and then flows to the area around the nerve to achieve treatment.

[0033] like Figure 1-Figure 10As shown, a limiting ring 10 is provided at one end of the outer wall of the movable nozzle 7, a push frame 101 is fixedly connected to the top of the outer wall of the limiting ring 10, a plurality of limiting strips 102 are fixedly connected to the inner wall of the limiting ring 10, a plurality of limiting strips 102 are slidably connected to the corresponding slide grooves 72, and the push frame 101 is located in the limiting hole 12. When the movable nozzle 7 is pushed, the push frame 101 is rotated so that the push frame 101 rotates the limiting ring 10, so that the limiting ring 10 rotates the plurality of limiting strips 102, and then the limiting tube 71 is rotated so that the limiting tube 71 drives the movable nozzle 7 to rotate. When the rotation is flush with the slide hole 13, the push frame 101 is pushed so that the push frame 101 pushes the limiting tube 71. Ring 10, and then push the movable nozzle 7, push the movable nozzle 7 to the specified position, and then insert the polyurethane catheter 8 into the specified position to facilitate the delivery of the medicine. In the combined state, the push frame 101 slides into the two grooves 66. When the polyurethane catheter 8 needs to be inserted into the patient's skin, the push frame 101 is pushed to drive the movable nozzle 7 to be inserted into the two sheaths 6. At this time, the push frame 101 is inserted into the two grooves 66 to improve the connectivity of the two sheaths 6. At this time, the puncture needle 5 is removed, and the push frame 101 is continued to be pushed, so that the polyurethane catheter 8 can be inserted deeper around the nerve. After connecting the external infusion tube, the nerve block treatment can be carried out continuously.

[0034] The working principle of this embodiment is as follows: when a patient is given a short-term nerve block treatment, the medical staff holds the anti-slip sleeve 11 and pushes it, thereby pushing the outer tube 1, so that the outer tube 1 drives the two tube sheaths 6 to move, and at the same time, the movement of the outer tube 1 drives the puncture needle 5 to be inserted around the patient's nerves, and the external infusion tube is inserted into the fixed nozzle 4, and is threadedly connected with the external thread 31 through the fixed sleeve, and the external infusion tube is connected and fixed to the connecting tube 3, so that the drug can be stably input into the fixed nozzle 4, and the medicine is input around the nerve through the fixed nozzle 4 and the puncture needle 5 to achieve treatment; When performing continuous nerve block treatment on the patient, after the puncture needle 5 is inserted into the skin, it is necessary to drive the polyurethane catheter 8 to be inserted deeper around the nerve, rotate the push frame 101, so that the push frame 101 rotates the limit ring 10, so that the limit ring 10 rotates a plurality of limit bars 102, and then rotates the limit tube 71, so that the limit tube 71 drives the movable nozzle 7 to rotate, and when the rotation is flush with the slide hole 13, push the push frame 101, so that the push frame 101 pushes the limit ring 10, and then pushes the movable nozzle 7, pushes the movable nozzle 7 to the designated position, and then inserts the polyurethane catheter 8 to the designated position, and at the same time, the push frame 101 is inserted into the two strip grooves 66; After the polyurethane catheter 8 is initially inserted around the nerve, when the puncture needle 5 needs to be removed, the two first spring plates 16 are squeezed at the same time, thereby squeezing the two squeezing blocks 17, so that the two squeezing blocks 17 squeeze the corresponding protrusions 65, so that the two protrusions 65 are away from the corresponding limiting grooves 15, and the outer tube 1 is pulled out at this time, and the puncture needle 5 is pulled out from the polyurethane catheter 8. At this time, the push frame 101 is connected with the two sheaths 6, and the push frame 101 is continued to be pushed, thereby driving the polyurethane catheter 8 to be inserted deeper around the nerve. At this time, the push frame 101 is removed to the outer end, and then one of the tube sheaths 6 is pulled outward, so that the tube sheath 6 pulls the connecting plate 610 connected thereto, so that the connecting plate 610 pulls the second arc block 611 connected thereto, so that the second arc block 611 presses the first arc block 69 that fits with it outward, and because the first arc block 69 is connected to the third spring plate 68, the first arc block 69 is forced to move upward, so that the second arc block 611 is separated from the first arc block 69, and the two tube sheaths 6 are disassembled; The medical staff then inserts the external infusion tube into the guide funnel 93 and fixes the external infusion tube so that the medicine is transported into the anti-reverse tube 9, and then transported to the rubber ball head 91, so that the medicine squeezes the rubber ball head 91, and then the guide hole 92 is opened to transport the medicine to the polyurethane catheter 8 at one end of the movable nozzle 7, and finally transported to the periphery of the nerve through the polyurethane catheter 8 to achieve treatment.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A puncture catheter needle assembly suitable for continuous nerve block, comprising an outer tube (1), characterized in that: A sleeve (2) is fixedly connected to one end of the outer tube (1), and a connecting tube (3) is fixedly connected to one end of the outer tube (1); A fixed nozzle (4) is fixedly connected inside the connecting tube (3), one end of the fixed nozzle (4) is fixedly connected to a puncture needle (5), and two sheaths (6) are provided on the other end of the outer tube (1). In the assembled state, the two sheaths (6) are combined; A movable nozzle (7) is provided at one end of the outer wall of the sleeve (2); a polyurethane catheter (8) is fixedly connected to one end of the movable nozzle (7); an anti-reverse tube (9) is fixedly connected inside the movable nozzle (7); and a limiting ring (10) is provided at one end of the outer wall of the movable nozzle (7).

2. A puncture catheter needle assembly suitable for continuous nerve block according to claim 1, characterized in that: The other end of the outer wall of the outer tube (1) is fixedly connected to an anti-slip sleeve (11), one end of the outer wall of the outer tube (1) is provided with a limiting hole (12), the top end of the outer wall of the outer tube (1) is provided with a sliding hole (13), the limiting hole (12) is connected to the sliding hole (13), the other end of the outer tube (1) is fixedly connected to two clamping blocks (14), the front and rear ends of the outer wall of the outer tube (1) are provided with limiting grooves (15), the front and rear ends of the outer wall of the outer tube (1) and the positions close to the anti-slip sleeve (11) are fixedly connected to first spring plates (16), and one end of the two first spring plates (16) is fixedly connected to an extrusion block (17).

3. A puncture catheter needle assembly suitable for continuous nerve block according to claim 1, characterized in that: One end of the outer wall of the connecting pipe (3) is provided with an external thread (31).

4. A puncture catheter needle assembly suitable for continuous nerve block according to claim 2, characterized in that: The bottoms of the two tube sheaths (6) are fixedly connected with auxiliary plates (61), the centers of the outer walls of the two tube sheaths (6) are fixedly connected with fixing ears (62), and the two fixing ears (62) are provided with slots (63). One side of the outer walls of the two tube sheaths (6) is fixedly connected with a second spring plate (64), and one end of the two second spring plates (64) is fixedly connected with a protrusion (65). The tops of the two tube sheaths (6) are provided with a groove (66), and the inner bottom end of one of the tube sheaths (6) is provided with a mounting groove (67), and the mounting groove (67) is fixedly connected with a third spring plate (68), and the front end of the third spring plate (68) is fixedly connected with a first arc block (69), and the rear end bottom of the other tube sheath (6) is fixedly connected with a connecting plate (610), and the rear end of the connecting plate (610) is fixedly connected with a second arc block (611).

5. A puncture catheter needle assembly suitable for continuous nerve block according to claim 4, characterized in that: In the assembled state, the two tube sheaths (6) are inserted into the other end of the outer tube (1), the two clamping blocks (14) are inserted into the corresponding clamping grooves (63), the two protrusions (65) are inserted into the corresponding limiting grooves (15), the connecting plate (610) and the second arc block (611) are inserted into the installation groove (67), and the second arc block (611) is fitted with the first arc block (69).

6. A puncture catheter needle assembly suitable for continuous nerve block according to claim 4, characterized in that: One end of the outer wall of the movable nozzle (7) is fixedly connected to a limiting tube (71), the inner wall of the limiting tube (71) is slidably connected to the outer wall of the sleeve (2), and the outer wall of the limiting tube (71) is provided with a plurality of sliding grooves (72).

7. A puncture catheter needle assembly suitable for continuous nerve block according to claim 1, characterized in that: One end of the anti-reversal tube (9) is fixedly connected to a rubber ball head (91), an end surface of the rubber ball head (91) is provided with a flow guide hole (92), and the other end of the anti-reversal tube (9) is fixedly connected to a flow guide hopper (93).

8. A puncture catheter needle assembly suitable for continuous nerve block according to claim 7, characterized in that: One end of the puncture needle (5) passes through the sleeve (2), the guide hole (92) and the two sheaths (6), and the outer wall of the puncture needle (5) is slidably connected to the inner wall of the polyurethane catheter (8).

9. A puncture catheter needle assembly suitable for continuous nerve block according to claim 6, characterized in that: A push frame (101) is fixedly connected to the top of the outer wall of the limiting ring (10), and a plurality of limiting strips (102) are fixedly connected to the inner wall of the limiting ring (10). The plurality of limiting strips (102) are slidably connected to corresponding sliding grooves (72), and the pushing frame (101) is located in the limiting hole (12).

10. A puncture catheter needle assembly suitable for continuous nerve block according to claim 9, characterized in that: In the assembled state, the push frame (101) slides into the two grooves (66).

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