Anti-stabbing indwelling needle

Abstract

The utility model discloses an anti-stabbing indwelling needle, which belongs to the technical field of medical instruments and comprises a catheter seat and a base inserted in the catheter seat, a hose is fixed at one end of the catheter seat, a liquid inlet head which is obliquely arranged is communicated with the side surface of the catheter seat, a rubber plug is inserted in the liquid inlet head, and transparent connecting pipes are fixed on two sides of the base. A blood return tube is slidably connected into the connecting tube, the end, facing the base, of the blood return tube is connected with a steel needle, the end, away from the base, of the blood return tube is closed, a connecting base is fixed into the catheter base and connected with the base in an inserted mode, a sealing piece is arranged in the catheter base and located below the connecting base, and a through hole is formed in the connecting base and allows the steel needle to enter. According to the stab-preventing remaining needle, when the steel needle is pulled out, the steel needle can be stored in the connecting pipe through driving of the curved bar, then after the steel needle is pulled out, the steel needle can be effectively wrapped, stab injury caused by the steel needle is avoided, meanwhile, residual blood in the steel needle can be prevented from dripping, and the risk of cross infection is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a puncture-proof indwelling needle. Background Art

[0002] The venous indwelling needle, also known as the venous needle and cannula needle, is widely used in clinical practice because it can reduce the pain caused by repeated venous punctures in patients and the fear of injections, relieve anxiety, facilitate clinical medication, rescue medication for critically ill patients, and reduce the workload of nurses. The core components of the indwelling needle include a soft indwelling hose that can be left in the blood vessel and a stainless steel puncture guiding needle core (puncture steel needle). When in use, the indwelling hose and the puncture steel needle are punctured into the blood vessel together. After the indwelling hose completely enters the blood vessel, the puncture steel needle is withdrawn, and only the soft indwelling hose is left in the blood vessel for infusion treatment. However, when medical staff withdraw the puncture steel needle, they may be stabbed by the tip of the puncture steel needle if not handled properly, resulting in infection. Content of the Utility Model

[0003] The purpose of the utility model is to provide a puncture-proof indwelling needle. When the steel needle is withdrawn, the steel needle can be received inside the connecting tube by the drive of a curved rod. Furthermore, after the steel needle is withdrawn, the steel needle can be effectively wrapped, thus avoiding being stabbed by the steel needle. At the same time, a rubber film is provided at the bottom of the connecting tube to seal the bottom of the steel needle, prevent the internal residual blood from dripping, and reduce the risk of cross-infection.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A puncture-proof indwelling needle includes a catheter seat and a base inserted inside the catheter seat. One end of the catheter seat is fixed with a hose, and an inclined liquid inlet head is communicated on the side of the catheter seat. A rubber stopper is inserted inside the liquid inlet head. Transparent connecting tubes are fixed on both sides of the base. A blood return tube is slidably connected inside the connecting tube. The blood return tube is connected with a steel needle at the end facing the base, and the end far from the base is closed. A connecting seat is fixed inside the catheter seat. The connecting seat and the base are connected by insertion. A sealing member is provided inside the catheter seat, and the sealing member is located below the connecting seat. A through hole is provided on the connecting seat for the steel needle to enter.

[0005] Further, a plurality of concave holes are provided at the upper end of the connecting seat, and a plurality of protrusions are fixed at the end of the base facing the connecting seat. The protrusions and the concave holes are in interference fit.

[0006] Further, a through groove is provided on the side of the connecting tube at the top of the base. A plurality of ribs are fixed on the wall of the through groove. A rubber film is fixed at the end of the connecting tube far from the base at the bottom of the base.

[0007] Further, curved rods are fixed on both sides of the blood return tube. The sides of the curved rods are in contact with the ribs, and the side of the blood return tube is in contact and slides with the inner wall of the connecting tube.

[0008] Furthermore, the closure member includes a semi-circular plate covering below the through hole. The semi-circular plates are symmetrically arranged. Connecting rods are fixed on the opposite sides of the two semi-circular plates. A fixing rod fixed on the inner wall of the catheter base is provided on the side of the connecting rod away from the semi-circular plate. The connecting rod slides inside the fixing rod. A spring is fixed at the end of the connecting rod facing the fixing rod, and the other end of the spring is fixed inside the fixing rod. There are two connecting rods on each semi-circular plate.

[0009] Furthermore, a tapered groove is provided on the side of the semi-circular plate facing the through hole.

[0010] The beneficial effects of the present utility model are as follows:

[0011] 1. When pulling out the steel needle of the anti-stabbing indwelling needle, the steel needle can be received inside the connecting tube by driving with the curved rod. Furthermore, after the steel needle is pulled out, the steel needle can be effectively wrapped, thus avoiding being stabbed by the steel needle.

[0012] 2. A glue film is provided at the bottom of the connecting tube to seal the bottom of the steel needle, prevent the internal residual blood from dripping, and reduce the risk of cross-infection.

[0013] 3. A semi-circular plate that can move automatically is provided below the connecting seat to close the through hole on the connecting seat after the connecting tube is taken out, prevent the blood from flowing back after the steel needle is withdrawn, and the semi-circular plate moves automatically when the connecting tube and the steel needle are inserted, which is convenient for operation. Description of the Drawings

[0014] Figure 1 is a schematic structural view of the anti-stabbing indwelling needle provided by the present utility model;

[0015] Figure 2 is a schematic cross-sectional view of the anti-stabbing indwelling needle provided by the present utility model;

[0016] Figure 3 is the Figure 1 enlarged view at A in the anti-stabbing indwelling needle provided by the present utility model;

[0017] Figure 4 is the Figure 3 enlarged view at B in the anti-stabbing indwelling needle provided by the present utility model;

[0018] Figure 5 is a schematic structural view of the semi-circular plate provided by the present utility model.

[0019] In the figure: 1. Catheter base; 2. Base; 3. Hose; 4. Liquid inlet head; 5. Rubber stopper; 6. Connecting tube; 7. Blood return tube; 8. Connecting seat; 9. Steel needle; 10. Concave hole; 11. Protrusion; 12. Through groove; 13. Rib; 14. Glue film; 15. Curved rod; 16. Semi-circular plate; 17. Connecting rod; 18. Fixing rod; 19. Spring; 20. Tapered groove. Detailed implementation mode

[0020] In order to further understand the content, characteristics and effects of the present utility model, the following embodiments are exemplified and described in detail with the accompanying drawings as follows.

[0021] Please refer to Figures 1 to 5 at the same time. The anti-stabbing indwelling needle of the embodiment of the present utility model will be described in detail below with reference to the accompanying drawings.

[0022] As shown in Figure 1 , the anti-stabbing indwelling needle includes a catheter seat 1 and a base 2 inserted inside the catheter seat 1. One end of the catheter seat 1 is fixed with a flexible tube 3. An inclined liquid inlet head 4 is communicated on the side of the catheter seat 1. A rubber stopper 5 is inserted inside the liquid inlet head 4. Transparent connecting tubes 6 are fixed on both sides of the base 2. A blood return tube 7 is slidably connected inside the connecting tube 6. The end of the blood return tube 7 facing the base 2 is connected with a steel needle 9, and the end far from the base 2 is closed. A connecting seat 8 is fixed inside the catheter seat 1. The connecting seat 8 is inserted and connected with the base 2. A sealing member is provided inside the catheter seat 1. The sealing member is located below the connecting seat 8. A through hole is provided on the connecting seat 8 for the steel needle 9 to enter.

[0023] As an implementation mode, a plurality of concave holes 10 are provided at the upper end of the connecting seat 8. A plurality of protrusions 11 are fixed at the end of the base 2 facing the connecting seat 8. The protrusions 11 and the concave holes 10 are in interference fit. The connecting seat 8 and the base 2 can be inserted and fixed through the cooperation of the protrusions 11 and the concave holes 10.

[0024] As an implementation mode, a through groove 12 is provided on the side of the connecting tube 6 at the top of the base 2. A plurality of ribs 13 are fixed on the wall of the through groove 12. A rubber film 14 is fixed at the end of the connecting tube 6 at the bottom of the base 2 far from the base 2. The rubber film 14 is preferably made of a silicone rubber material with good elasticity.

[0025] Curved rods 15 are fixed on both sides of the blood return tube 7. The sides of the curved rods 15 are in contact with the ribs 13. The side of the blood return tube 7 is in contact and slides with the inner wall of the connecting tube 6. Therefore, after pulling the curved rods 15, the blood return tube 7 can be driven to move up and down by the curved rods 15. As the blood return tube 7 moves up and down, the steel needle 9 connected to the blood return tube 7 can be received or extended out of the connecting tube 6. During the sliding process of the curved rods 15, the sides of the curved rods 15 are in contact with the ribs 13. Therefore, the curved rods 15 need to be under force to move.

[0026] A closure is further provided inside the catheter seat 1, wherein the closure includes a semicircular plate 16 covering below the through hole, the semicircular plates 16 are symmetrically provided, connecting rods 17 are fixed to the opposite sides of the two semicircular plates 16, a fixing rod 18 fixed to the inner wall of the catheter seat 1 is provided on the side of the connecting rod 17 away from the semicircular plates 16, the connecting rod 17 slides inside the fixing rod 18, a spring 19 is fixed to the end of the connecting rod 17 facing the fixing rod 18, the other end of the spring 19 is fixed inside the fixing rod 18, two connecting rods 17 are provided on each semicircular plate 16, and a conical groove 20 is provided on the side of the semicircular plate 16 facing the through hole, the provision of the conical groove 20 can facilitate the insertion of the connecting tube 6 and the steel needle 9 into the catheter seat 1, and due to the resistance to the conical groove 20, an inclined force is provided, so that the semicircular plate is more easily moved toward the fixing rod 18 side.

[0027] In this embodiment, when the indwelling needle enters the target for indwelling, the base 2 and the connecting seat 8 are plugged and fixed, and the curved rod 15 is pushed to place the curved rod 15 at the bottom of the through groove 12. At this time, the steel needle 9 extends out of the connecting tube 6 part located inside the catheter seat 1, and the steel needle 9 extends out of the hose 3 after passing through the adhesive film 14 for indwelling insertion. After the steel needle 9 carries the hose 3 into the blood vessel, the insertion position is observed to be correct by observing the blood return situation inside the return blood vessel 7. If the insertion position is correct, the steel needle 9 is taken out. During the removal process, the curved rod 15 is first pulled up, and the curved rod 15 moves upward along the through groove 12, driving the steel needle 9 to be stored in the connecting tube 6. At the same time, due to the good ductility of the adhesive film 14 itself, after the steel needle 9 enters the connecting tube 6, the adhesive film 14 can seal the connecting tube 6 to prevent blood inside the steel needle 9 from dripping. Secondly, the base 2 is pulled out, the connecting tube 6 is pulled out, and finally the infusion equipment can be connected along the liquid inlet tube.

[0028] When the connecting tube 6 is pulled out, the spring 19 is reset, driving the connecting rod 17 and the semicircular plate 16 to move until the middle of the two semicircular plates 16 collide with each other, thereby sealing the through hole.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stab-proof indwelling needle, characterized in that: The invention comprises a catheter seat (1) and a base (2) plugged into the catheter seat (1), a hose (3) being fixed at one end of the catheter seat (1), a liquid inlet head (4) being connected to the side of the catheter seat (1), a rubber plug (5) being plugged into the liquid inlet head (4), transparent connecting tubes (6) being fixed at both sides of the base (2), a return blood vessel (7) being slidably connected inside the connecting tube (6), a steel needle (9) being connected to the end of the return blood vessel (7) facing the base (2), and being closed at the end away from the base (2), a connecting seat (8) being fixed inside the catheter seat (1), the connecting seat (8) being plugged into the base (2), a sealing member being provided inside the catheter seat (1), the sealing member being located below the connecting seat (8), and a through hole being provided on the connecting seat (8) for the steel needle (9) to enter.

2. The stab-proof indwelling needle according to claim 1, characterized in that: The upper end of the connecting seat (8) is provided with a plurality of recessed holes (10), and the base (2) is fixed with a plurality of protrusions (11) facing the end of the connecting seat (8), and the protrusions (11) and the recessed holes (10) are interference-fitted.

3. The stab-proof indwelling needle according to claim 1, characterized in that: A through groove (12) is provided on the side of the connecting tube (6) located at the top of the base (2), a plurality of ribs (13) are fixed on the groove wall of the through groove (12), and a rubber film (14) is fixed on the end of the connecting tube (6) located at the bottom of the base (2) away from the base (2).

4. The stab-proof indwelling needle according to claim 3, characterized in that: Curved rods (15) are fixed on both sides of the return blood vessel (7), the side surfaces of the curved rods (15) abut against the ribs (13), and the side surfaces of the return blood vessel (7) are in contact and sliding with the inner wall of the connecting tube (6).

5. The stab-proof indwelling needle according to claim 1, characterized in that: The sealing member comprises a semicircular plate (16) covering below the through hole, the semicircular plates (16) are symmetrically arranged, connecting rods (17) are fixed on opposite sides of the two semicircular plates (16), a fixing rod (18) fixed on the inner wall of the catheter seat (1) is arranged on the side of the connecting rod (17) away from the semicircular plate (16), the connecting rod (17) slides along the inside of the fixing rod (18), a spring (19) is fixed on the end of the connecting rod (17) facing the fixing rod (18), the other end of the spring (19) is fixed inside the fixing rod (18), and two connecting rods (17) are arranged on each semicircular plate (16).

6. The stab-proof indwelling needle according to claim 5, characterized in that: The semicircular plate (16) is provided with a tapered groove (20) on the side facing the through hole.

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