Disposable central venous indwelling catheter puncture suite

Abstract

The utility model relates to the technical field of medical instruments, and provides a disposable central venous indwelling catheter puncture suite which comprises a needle tube, a needle handle is connected in the needle tube in a sliding mode, a puncture needle is fixedly connected to one end of the needle tube, a trocar is arranged outside the puncture needle, clamping plates are fixedly connected to the two sides of the outer portion of the needle tube, and the clamping plates are fixedly connected to the outer portion of the needle tube. Two clamping plates are fixedly connected to the two sides of the outer portion of the trocar, connecting grooves are formed in the two clamping plates, connecting plates are fixedly connected to the two sides of the outer portion of the trocar, sliding grooves are formed in the two connecting plates, and two first hollow rods are fixedly connected to the bottoms of inner cavities of the two sliding grooves. By means of the technical scheme, the problems that in the prior art, after blood is seen through puncture and pumpback in traditional central vein catheterization puncture, a guide wire is placed after a puncture needle is displaced, the guide wire is placed unsmoothly due to displacement of the puncture needle, the success rate of central vein puncture is affected, and the puncture injury risk is increased are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and in particular to a disposable central venous catheter puncture kit. Background Art

[0002] A venous catheter puncture kit is a medical device used for puncture and placement of central venous catheters during medical procedures, especially in neurological and cardiovascular surgery.

[0003] The patent specification with announcement number CN205866741U discloses a central venous catheter kit, including a puncture needle, a vascular sheath, a guide wire and a central venous catheter; the guide wire includes a core, the end of the core close to the heart cavity is the distal end, the cross-section of the distal end is circular, and the outer diameter in the axial direction is consistent; the end of the core away from the heart cavity is the proximal end, the cross-section of the proximal end is circular, and the outer diameter in the axial direction is consistent; the outer diameter of the cross-section of the proximal end is larger than the outer diameter of the cross-section of the distal end; it also includes a connecting cable for outputting intracardiac signals, and the connecting cable is connected to the proximal end of the guide wire through a cable adapter.

[0004] However, in the implementation of relevant technologies, it was found that the above technical solution has the following problems: the above device is not convenient for the guide wire to be accurately placed in the central vein during use. When the central vein puncture is completed and blood returns, the puncture needle will generally shift and then the guide wire will be placed, which will cause the guide wire to be placed poorly, thereby affecting the success rate of central vein puncture and increasing the risk of puncture injury. Therefore, further improvement is needed. Utility Model Content

[0005] The utility model proposes a disposable central venous catheter puncture kit, which solves the problem in the related art that the puncture needle will shift after the puncture and aspiration of blood, and then the guide wire will be inserted. The displacement of the puncture needle often leads to unsmooth insertion of the guide wire, which will affect the success rate of central venous puncture and increase the risk of puncture injury.

[0006] The technical solution of the utility model is as follows:

[0007] A disposable central venous catheter puncture kit comprises a needle tube, the interior of the needle tube is slidably connected to a needle handle, one end of the needle tube is fixedly connected to a puncture needle, a trocar is provided on the outside of the puncture needle, both sides of the exterior of the needle tube are fixedly connected to splints, the interiors of the two splints are provided with connecting grooves, both sides of the exterior of the trocar are fixedly connected to connecting plates, the interiors of the two connecting plates are provided with sliding grooves, the inner bottoms of the inner cavities of the two sliding grooves are fixedly connected to two hollow rods 1, the inner bottoms of the inner cavities of the four hollow rods 1 are fixedly connected to a spring 1, the interiors of the four hollow rods 1 are slidably connected to a sliding rod 1, and the interiors of the two sliding grooves are slidably connected to a clamping plate.

[0008] Preferably, the puncture needle is in contact with the trocar, and one end of the trocar is in contact with one end of the needle tube.

[0009] Preferably, the bottom of the clamping plate is fixedly connected to the two sliding rods 1, and one end of the spring 1 is fixedly connected to the bottom of the sliding rod 1.

[0010] Preferably, the clamping plate is in contact with the connecting groove, and the connecting plate is in contact with the clamping plate.

[0011] Preferably, two fixing grooves are provided inside the two clamping plates, and a hollow rod 2 is fixedly connected inside the four fixing grooves.

[0012] Preferably, the bottom of the inner cavity of the four hollow rods 2 is fixedly connected to the spring 2, and the inside of the four hollow rods 2 is slidably connected to the sliding rod 2.

[0013] Preferably, the bottom of the sliding rod 2 is fixedly connected to one end of the spring 2, and one end of the two sliding rods 2 is fixedly connected to a pressure plate.

[0014] Preferably, the bottoms of the two pressing plates are fixedly connected with round rods, and the two round rods are in contact with the two clamping plates.

[0015] The working principle and beneficial effects of the utility model are as follows:

[0016] 1. In the present invention, the puncture needle is punctured through the skin and enters the vein, and the needle handle is pulled back to observe whether blood returns. After the puncture needle and the cannula needle successfully enter the vein, the puncture needle can be pulled out, and the cannula needle is left in the vein. Then, the guide wire is inserted through the cannula needle. The above device can avoid the problem of incorrect guide wire insertion position and thus obstruction caused by pulling out the puncture needle first and then inserting the guide wire. It solves the problem of traditional central venous catheter puncture in which the puncture needle will shift after puncture and aspiration to see blood, and the displacement of the puncture needle often leads to obstruction of guide wire insertion, thereby affecting the success rate of central venous puncture and increasing the risk of puncture injury.

[0017] 2. In the present invention, the movement of the two sliding rods will drive the two springs to compress the bottom of the inner cavity of the hollow rod. The movement of the pressure plate will also drive the round rod to move. The movement of the round rod will drive the connecting plate to move. When the connecting plate moves until the contact between the connecting groove disappears, the cannula needle is rotated. The rotation of the cannula needle will drive the two connecting plates to rotate. When the two connecting plates are rotated until the contact between the two splints disappears, the medical staff can pull out the puncture needle and insert the guide wire through the cannula needle, which solves the problem of traditional central venous catheter puncture in which the puncture needle will shift after the blood is aspirated and then the guide wire is inserted. The displacement of the puncture needle often leads to unsmooth insertion of the guide wire, which will affect the success rate of central venous puncture and increase the risk of puncture injury. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 For this utility model Figure 1 A magnified view of point A in the figure;

[0021] Figure 3 This is a schematic diagram of the structure of the needle tube and the trocar of the present invention;

[0022] Figure 4 This is a schematic diagram of the decomposition of part of the structure of the utility model Figure 1 ;

[0023] Figure 5 This is a schematic diagram of the decomposition of part of the structure of the utility model Figure 2 .

[0024] In the figure: 1. needle tube; 2. needle handle; 3. puncture needle; 4. trocar; 5. splint; 6. connecting groove; 7. connecting plate; 8. sliding groove; 9. hollow rod 1; 10. spring 1; 11. sliding rod 1; 12. clamping plate; 13. fixing groove; 14. hollow rod 2; 15. spring 2; 16. sliding rod 2; 17. pressure plate; 18. round rod. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0026] Example 1

[0027] like Figures 1 to 4 As shown, this embodiment proposes a disposable central venous catheter puncture kit, including a needle tube 1, the interior of the needle tube 1 is slidably connected to a needle handle 2, one end of the needle tube 1 is fixedly connected to a puncture needle 3, the outside of the puncture needle 3 is provided with a cannula needle 4, the outside of the needle tube 1 is fixedly connected to splints 5, the insides of the two splints 5 are provided with connecting grooves 6, the outside of the cannula needle 4 is fixedly connected to connecting plates 7 on both sides, the insides of the two connecting plates 7 are provided with sliding grooves 8, the bottom of the inner cavity of the two sliding grooves 8 are fixedly connected to two hollow rods 9, the bottom of the inner cavity of the four hollow rods 9 are fixedly connected to a spring 10, the insides of the four hollow rods 9 are slidably connected to a sliding rod 11, and the insides of the two sliding grooves 8 are slidably connected to a clamping plate 12.

[0028] In this embodiment, the puncture needle 3 is in contact with the trocar 4, and one end of the trocar 4 is in contact with one end of the needle tube 1, which can facilitate the removal of the puncture needle 3 and the trocar 4 after successful central vein puncture.

[0029] In this embodiment, the bottom of the clamping plate 12 is fixedly connected to the two sliding rods 11, and one end of the spring 10 is fixedly connected to the bottom of the sliding rod 11, which can facilitate the compression of the spring 10 when the sliding rod 11 moves.

[0030] In this embodiment, the clamping plate 12 is in contact with the connecting groove 6 , and the connecting plate 7 is in contact with the clamping plate 5 , which can facilitate the fixing of the clamping plate 12 inside the connecting groove 6 .

[0031] When in use, the medical staff first puts the cannula needle 4 on the outside of the puncture needle 3. At this time, one end of the cannula needle 4 will contact one end of the needle tube 1, and then the cannula needle 4 will be rotated. The rotation of the cannula needle 4 will drive the two connecting plates 7 to rotate, and the rotation of the two connecting plates 7 will drive the two clamping plates 12 to rotate. When the two clamping plates 12 are respectively rotated to contact one side of the two splints 5, the clamping plate 12 will be forced to drive the sliding rod 11 to slide toward the inside of the hollow rod 9 and at the same time drive the spring 10 to compress. At this time, the clamping plate 12 will move to the inside of the sliding groove 8 and continue to rotate with the rotation of the cannula needle 4. When the clamping plate 12 rotates to the connecting groove 6, the contact between the clamping plate 12 and the splint 5 will disappear and at the same time drive the spring 10 When the spring 10 is reset, the sliding rod 11 will be reset, and when the sliding rod 11 is reset, the clamping plate 12 will be reset. At this time, the two clamping plates 12 will contact and be fixed with the two connecting grooves 6 respectively, and then the cannula needle 4 will be fixed to one end of the needle tube 1. At this time, the medical staff will select an appropriate intravenous catheterization site, pierce the skin with the puncture needle 3 and enter the vein, and at the same time, pull the needle handle 2 to withdraw blood to observe whether it returns blood. After the puncture needle 3 and the cannula needle 4 successfully enter the vein, the puncture needle 3 can be pulled out, and the cannula needle 4 can be left in the vein, and then the guide wire can be inserted through the cannula needle 4. The above device can avoid pulling out the puncture needle 3 first and then inserting the guide wire, which will cause the guide wire to be inserted in an incorrect position, thereby leading to the problem of blockage.

[0032] Example 2

[0033] like Figure 5 As shown, based on the same concept as the above embodiment 1, this embodiment further proposes that two fixing grooves 13 are provided inside the two clamping plates 5, and the insides of the four fixing grooves 13 are fixedly connected to the hollow rods 14.

[0034] In this embodiment, the bottom of the inner cavity of the four hollow rods 2 14 is fixedly connected with a spring 2 15, and the interior of the four hollow rods 2 14 is slidably connected with a sliding rod 2 16, which can facilitate the compression of the spring 2 15 when the sliding rod 2 16 moves.

[0035] In this embodiment, the bottom of the sliding rod 2 16 is fixedly connected to one end of the spring 2 15 , and one end of the two sliding rods 2 16 is fixedly connected to a pressure plate 17 , which can facilitate the movement of the pressure plate 17 while driving the two sliding rods 2 16 to move.

[0036] In this embodiment, the bottoms of the two pressing plates 17 are fixedly connected with round rods 18 , and the two round rods 18 are in contact with the two clamping plates 12 , so that the round rods 18 can move while driving the clamping plates 12 to move.

[0037] When the two connecting plates 7 are rotated to the contact between the two splints 5 and the two clamps 5 respectively, the medical staff can pull out the puncture needle 3 and insert the guide wire through the cannula 4.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A disposable central venous catheter puncture kit, comprising a needle tube (1), characterized in that: The needle tube (1) is slidably connected to a needle handle (2), one end of the needle tube (1) is fixedly connected to a puncture needle (3), a trocar (4) is provided on the outside of the puncture needle (3), and the outside of the needle tube (1) is fixedly connected to splints (5), the insides of the two splints (5) are provided with connecting grooves (6), the outside of the trocar (4) is fixedly connected to connecting plates (7), the insides of the two connecting plates (7) are provided with sliding grooves (8), the bottoms of the inner cavities of the two sliding grooves (8) are fixedly connected to two hollow rods (9), the bottoms of the inner cavities of the four hollow rods (9) are fixedly connected to springs (10), the insides of the four hollow rods (9) are slidably connected to sliding rods (11), and the insides of the two sliding grooves (8) are slidably connected to clamping plates (12).

2. A disposable central venous catheter puncture kit according to claim 1, characterized in that: The puncture needle (3) is in contact with the trocar (4), and one end of the trocar (4) is in contact with one end of the needle tube (1).

3. A disposable central venous catheter puncture kit according to claim 1, characterized in that: The bottom of the clamping plate (12) is fixedly connected to the two sliding rods (11), and one end of the spring (10) is fixedly connected to the bottom of the sliding rod (11).

4. A disposable central venous catheter puncture kit according to claim 1, characterized in that: The clamping plate (12) is in contact with the connecting groove (6), and the connecting plate (7) is in contact with the clamping plate (5).

5. A disposable central venous catheter puncture kit according to claim 4, characterized in that: Two fixing grooves (13) are provided inside the two clamping plates (5), and two hollow rods (14) are fixedly connected inside the four fixing grooves (13).

6. A disposable central venous catheter puncture kit according to claim 5, characterized in that: The bottom of the inner cavity of the four hollow rods 2 (14) is fixedly connected with a spring 2 (15), and the inside of the four hollow rods 2 (14) is slidably connected with a sliding rod 2 (16).

7. A disposable central venous catheter puncture kit according to claim 6, characterized in that: The bottom of the second sliding rod (16) is fixedly connected to one end of the second spring (15), and one end of the two second sliding rods (16) is fixedly connected to a pressure plate (17).

8. The disposable central venous catheter puncture kit according to claim 7, characterized in that: The bottoms of the two pressing plates (17) are fixedly connected to round rods (18), and the two round rods (18) are in contact with the two clamping plates (12).

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