A waterproof positioning structure for an indwelling needle and a method of using the same

Abstract

The present invention discloses a waterproof positioning structure for an indwelling needle, comprising an outer ring and an inner ring arranged in the inner cavity of the outer ring, the outer ring and the inner ring being concentrically arranged, and a transparent waterproof sleeve being movably provided between the outer ring and the inner ring. When the present invention is in use, the transparent waterproof sleeve can be first put on the outside of the inner ring, and then the outer ring can be put on the outside of the transparent waterproof sleeve and aligned with the inner ring. Subsequently, a plurality of first threaded rods are passed through the square rod, and the limiting plate is fit with the inner ring. When the four knobs are rotated in sequence, the circular plate can be driven to move, so that the four L-shaped cone nails can be respectively inserted into the adjacent annular groove cavities, and then the outer ring and the inner ring can be locked. When the medical staff puts the inner ring on the patient's arm, the two straps on the adjacent sides can be tightened to bring them close together, and the Velcro thorn surface and the Velcro hair surface can be bonded together, so as to achieve the effect of sealing and waterproofing, and thus make it convenient for the patient to take a bath while carrying the indwelling needle.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, in particular to a waterproof positioning structure for an indwelling needle and a method for using the structure. Background Art

[0002] The use of intravenous catheters can reduce the pain and fear of injections caused by repeated intravenous punctures in children, reduce parents' anxiety, facilitate clinical medication, emergency medication for acute and critical patients, reduce the workload of nurses, and reduce the pain of children. Therefore, intravenous catheters are widely used in clinical practice. Faced with this special group of children, the length of time the intravenous catheter is in place and the comfort of the children have become the most concerned issues for nurses and parents, and are also the signs of the successful use of intravenous catheters and the premise of their promotion.

[0003] Currently, the retention time of a clinical intravenous catheter is 36-72 hours. During this period, it is inconvenient for patients with intravenous catheters to take a bath. They are afraid that the intravenous catheter will come into contact with water, the film will become wet, and the catheter will shift and fall off. Therefore, family members and patients often avoid bathing or use plastic wrap or plastic bags to protect the catheter during the use of the catheter. However, protecting the catheter without bathing greatly affects the patient's quality of life in the hot summer. Moreover, using plastic wrap or plastic bags to protect the catheter during bathing often does not achieve a waterproof effect. After use, the film of the catheter often becomes wet and the catheter shifts. In addition, the existing fixation method for the catheter cannot guarantee an effective fixation effect, which may result in the catheter not being able to be fixed and used smoothly. Summary of the Invention

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a waterproof positioning structure for an indwelling needle, comprising an outer ring and an inner ring arranged in the inner cavity of the outer ring, the outer ring and the inner ring being concentrically arranged, and a transparent waterproof sleeve movably passing through the outer ring and the inner ring, four square holes being evenly opened on the inner ring, and the inner cavities of the four square holes are slidably fitted with square rods, the left ends of the four square rods are fixedly connected to a positioning plate, and the positioning plate is provided with an annular groove, the right ends of the four square rods are fixedly connected to a first threaded rod, and the outer wall of one of the first threaded rods is sleeved with a sleeve, the inner cavity of the sleeve is provided with an internal thread matching the first threaded rod, and the sleeve is screwed and fixed to the first threaded rod through the internal thread, the outer wall of the sleeve is rotatably sleeved with a rotating ring fitted therewith, the outer wall of the sleeve is sleeved and fixed with two left and right fixed rings, the two fixed rings are respectively fitted with the left and right sides of the rotating ring, the outer wall of the rotating ring is fixedly connected with a top cover, and the top circular portion of the inner cavity of the top cover A threaded cylinder is fixedly connected to the center of the screw cylinder, the inner cavity of the threaded cylinder is threadedly connected to a threaded column, and the bottom end of the threaded column is fixedly connected to the bottom cover, the bottom of the bottom cover is fixedly connected to a flexible connecting rod, and the other end of the flexible connecting rod is fixedly connected to a connecting head, and the other side of the connecting head is fixedly connected to a strong elastic sleeve, the outer ring is provided with four cylindrical cavities aligned with the position of the square hole, and the inner cavity of the cylindrical cavity is rotatably connected to a circular plate, and the circular plate is rotatably connected to a second threaded rod at the center of the circle of the side away from the inner ring, the four cylindrical cavities are provided with threaded holes on the side away from the inner ring, and the other ends of the four second threaded rods respectively pass through the inner cavities of adjacent threaded holes and are fixedly connected to knobs, the left sides of the four cylindrical cavities are provided with limited slots, and the inner cavities of the limited slots are slidably connected with L-shaped cone nails, one end of the four L-shaped cone nails are respectively fixedly connected to adjacent circular plates, and the other ends of the four L-shaped cone nails respectively pass through the outer wall of the transparent waterproof sleeve and are inserted into the inner cavities of adjacent annular slots.

[0005] Preferably, the outer wall of the transparent waterproof sleeve is fixedly connected to two upper and lower straps near the left and right sides, the front sides of the two straps at the bottom are fixedly connected to the Velcro thorn surface, and the back sides of the two straps at the top are fixedly connected to the Velcro hair surface.

[0006] Preferably, a through hole is opened at the center of the top circle of the top cover, and the inner cavity of the through hole is rotatably connected to a limiting rod, the bottom end of the limiting rod is fixedly connected to the top end of the threaded column, and the top end of the limiting rod is fixedly connected to the limiting plate.

[0007] Preferably, pipe clamping grooves are provided on both left and right sides of the bottom of the top cover, and the inner diameter of the top cover is consistent with the outer diameter of the bottom cover.

[0008] Preferably, an annular soft pad is bonded to the inner wall of the inner ring.

[0009] Preferably, an anti-slip sleeve is sleeved and fixed on the outer wall of the knob.

[0010] Preferably, the thickness of the annular groove is consistent with the outer diameter of the L-shaped cone nail.

[0011] A method for using a waterproof positioning structure for an indwelling needle comprises the following steps:

[0012] S1: First, place the inner ring into the inner cavity of the transparent waterproof sleeve, and then put the outer ring on the outer side of the transparent waterproof sleeve so that it is aligned with the inner ring;

[0013] S2: Next, the four square rods and the first threaded rod are respectively passed through the inner cavities of the square holes on the inner ring, and the four positioning plates are all fitted with the left side of the inner ring;

[0014] S3: When the medical staff turns the four knobs in sequence, the adjacent second threaded rods are driven to rotate. The rotation of the second threaded rods pushes the circular plate to slide and approach the inner ring. The sliding of the circular plate drives the L-shaped cone nail to move synchronously. The L-shaped cone nail is inserted through the transparent waterproof sleeve and into the adjacent annular groove cavity, thereby assembling the outer ring, inner ring and transparent waterproof sleeve together;

[0015] S4: After the medical staff inserts the indwelling needle into the patient's vein, the inner ring can be put on the patient's arm. The four first threaded rods can support the transparent waterproof sleeve, so that the transparent waterproof sleeve can also be put on the patient's arm;

[0016] S5: Screw the sleeve onto the first threaded rod above the arm using the internal thread, and adjust the horizontal position of the sleeve according to the position of the needle, so as to drive the strong elastic sleeve to move synchronously;

[0017] S6: Adjust the position of the connector by rotating the flexible connecting rod, and insert the needle seat of the indwelling needle into the strong elastic sleeve. Then, pass the excess infusion tube between the top cover and the bottom cover. Rotate the bottom cover so that the threaded column rises in the inner cavity of the threaded barrel, thereby closing the top and bottom covers, and clamp the infusion tube through the tube clamping grooves on both sides.

[0018] S7: After the medical staff has installed and fixed the indwelling needle, they can put down the transparent waterproof sleeve to cover the indwelling needle, and by pulling the two straps on both sides together and bonding the Velcro thorn surface to the adjacent Velcro hair surface, the two sides of the transparent waterproof sleeve can be tightened.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention comprises an outer ring, an inner ring, a transparent waterproof sleeve, a positioning plate, an annular groove, a square rod, a first threaded rod, an L-shaped cone nail, a circular plate, a cylindrical cavity, a second threaded rod, a knob, an anti-slip sleeve, a strap, a Velcro thorn-shaped surface and a Velcro hair-shaped surface. The transparent waterproof sleeve can be put on the outer side of the inner ring first, then the outer ring is put on the outer side of the transparent waterproof sleeve and aligned with the inner ring. Subsequently, a plurality of first threaded rods are passed through the square rod, and the limiting plate is fitted with the inner ring. When the four knobs are rotated in sequence, the circular plate can be driven to move, so that the four L-shaped cone nails can be respectively inserted into the adjacent annular groove cavities, and then the outer ring and the inner ring can be locked. When the medical staff puts the inner ring on the patient's arm, the two straps on the adjacent sides can be tightened to bring them closer, and the Velcro thorn-shaped surface and the Velcro hair-shaped surface can be bonded together, so as to achieve a sealing and waterproof effect, thereby making it convenient for the patient to take a bath while carrying an indwelling needle.

[0021] 2. The present invention is characterized in that the sleeve is rotated and screwed into the first threaded rod above the patient's arm through the arrangement of the first threaded rod, the transparent waterproof sleeve, the sleeve, the rotating ring, the fixing ring, the top cover, the threaded barrel, the threaded column, the bottom cover, the limiting rod, the limiting plate, the tube clamping groove, the flexible connecting rod, the connecting head and the strong elastic sleeve. The sleeve can be rotated and screwed into the first threaded rod above the patient's arm. The positions of the top cover and the bottom cover can be adjusted according to the position of the needle insertion. Then, the needle seat of the indwelling needle can be inserted into the strong elastic sleeve, and the needle insertion angle of the indwelling needle can be adjusted by the arrangement of the flexible connecting rod. When the angle adjustment is completed, the excess infusion tube can be rolled up into the inner cavity of the bottom cover and passed through the two tube clamping grooves. By rotating the bottom cover, the threaded column is raised and lowered in the inner cavity of the threaded barrel, thereby driving the top cover and the bottom cover to close, and slightly clamping the infusion tube, thereby playing the role of positioning the indwelling needle. Furthermore, it does not affect the normal arm movement of the patient and at the same time prevents the indwelling needle from moving and falling off when the patient is carrying the indwelling needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the main structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the sleeve connection structure of the inner ring and the outer ring of the present invention;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the top cover of the present invention;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the positioning plate of the present invention;

[0027] Figure 6 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 7 for Figure 2 Enlarged view of point B in the middle.

[0029] Numbers in the figure: 1. Outer ring; 2. Inner ring; 3. Transparent waterproof sleeve; 4. Strap; 5. Velcro thorn surface; 6. Annular cushion; 7. Square rod; 8. First threaded rod; 9. Positioning plate; 10. Annular slot; 11. Cylindrical cavity; 12. Round plate; 13. Second threaded rod; 14. Knob; 15. Anti-slip sleeve; 16. L-shaped cone nail; 17. Sleeve; 18. Rotating ring; 19. Fixed ring; 20. Top cover; 21. Threaded barrel; 22. Threaded column; 23. Bottom cover; 24. Bendable connecting rod; 25. Connector; 26. Strong elastic sleeve; 27. Tube clamping groove; 28. Limit rod; 29. ​​Limit plate; 30. Velcro thorn surface. DETAILED DESCRIPTION

[0030] See also Figure 1-7The present invention provides a technical solution: a waterproof positioning structure for an indwelling needle, comprising an outer ring 1 and an inner ring 2 arranged in the inner cavity of the outer ring 1, the inner wall of the inner ring 2 is bonded with an annular soft pad 6 to improve the comfort of the patient wearing, the outer ring 1 and the inner ring 2 are concentrically arranged, and a transparent waterproof sleeve 3 is movably provided between the outer ring 1 and the inner ring 2, the outer wall of the transparent waterproof sleeve 3 is fixedly connected to two upper and lower arranged straps 4 near the left and right sides, the front sides of the two straps 4 at the bottom are fixedly connected to a Velcro thorn-like surface 5, and the back sides of the two straps 4 at the top are fixedly connected to a Velcro hair-like surface 30, which can tighten the two sides of the transparent waterproof sleeve 3 to improve the waterproof effect, four square holes are evenly opened on the inner ring 2, and the inner cavities of the four square holes are slidably fitted with square rods 7. The left ends of the four square rods 7 are fixedly connected to the positioning plate 9, and the positioning plate 9 is provided with an annular groove 10. The right ends of the four square rods 7 are fixedly connected to the first threaded rod 8, and the outer wall of one of the first threaded rods 8 is provided with a sleeve 17, the inner cavity of the sleeve 17 is provided with an internal thread that matches the first threaded rod 8, and the sleeve 17 is screwed and fixed to the first threaded rod 8 through the internal thread. The outer wall of the sleeve 17 is rotatably sleeved with a rotating ring 18 that fits therewith. The outer wall of the sleeve 17 is sleeved and fixed with two left and right fixed rings 19, which are respectively fitted with the left and right sides of the rotating ring 18. The outer wall of the rotating ring 18 is fixedly connected with a top cover 20, and a threaded cylinder 21 is fixedly connected to the center of the top circle of the inner cavity of the top cover 20. The inner cavity of the threaded cylinder 21 A threaded column 22 is threadedly connected, and the bottom end of the threaded column 22 is fixedly connected to the bottom cover 23. A through hole is provided at the center of the top circle of the top cover 20, and the inner cavity of the through hole is rotatably connected to the limit rod 28. The bottom end of the limit rod 28 is fixedly connected to the top of the threaded column 22, and the top end of the limit rod 28 is fixedly connected to the limit plate 29. Pipe clamping grooves 27 are provided on the left and right sides of the bottom of the top cover 20. The inner diameter length of the top cover 20 is consistent with the outer diameter length of the bottom cover 23. A flexible connecting rod 24 is fixedly connected to the bottom of the bottom cover 23, and the other end of the flexible connecting rod 24 is fixedly connected to a connecting head 25. The other side of the connecting head 25 is fixedly connected to a strong elastic sleeve 26. Four cylindrical cavities 11 aligned with the square hole position are provided on the outer ring 1, and the inner cavity of the cylindrical cavity 11 is rotatably connected to the bottom of the top cover 20. It is movably connected with a circular plate 12, and a second threaded rod 13 is rotatably connected to the center of the circular plate 12 on the side away from the inner ring 2. A threaded hole is provided on the side of the four cylindrical cavities 11 away from the inner ring 2, and the other ends of the four second threaded rods 13 respectively penetrate the inner cavity of the adjacent threaded holes and are fixedly connected with a knob 14. The outer wall of the knob 14 is fixedly sleeved with an anti-slip sleeve 15. The left side of the four cylindrical cavities 11 is provided with a limited slot, and the inner cavity of the limited slot is slidably connected with an L-shaped cone nail 16. One end of the four L-shaped cone nails 16 is fixedly connected to the adjacent circular plate 12, and the other end of the four L-shaped cone nails 16 respectively penetrates the outer wall of the transparent waterproof sleeve 3 and is inserted into the inner cavity of the adjacent annular slot 10. The thickness of the annular slot 10 is consistent with the outer diameter length of the L-shaped cone nail 16.

[0031] A method for using a waterproof positioning structure for an indwelling needle comprises the following steps:

[0032] S1: First, put the inner ring 2 into the inner cavity of the transparent waterproof sleeve 3, and then put the outer ring 1 on the outer side of the transparent waterproof sleeve 3 so that it is aligned with the inner ring 2;

[0033] S2: Next, the four square rods 7 and the first threaded rod 8 are respectively passed through the inner cavity of the square hole on the inner ring 2, and the four positioning plates 9 are all fitted with the left side of the inner ring 2;

[0034] S3: When the medical staff rotates the four knobs 14 in sequence, the adjacent second threaded rods 13 are driven to rotate. The rotation of the second threaded rods 13 pushes the circular plate 12 to slide and approach the inner ring 2. The sliding of the circular plate 12 drives the L-shaped cone nail 16 to move synchronously. The L-shaped cone nail 16 passes through the transparent waterproof sleeve 3 and is inserted into the inner cavity of the adjacent annular groove 10, thereby assembling the outer ring 1, the inner ring 2 and the transparent waterproof sleeve 3 together;

[0035] S4: After the medical staff inserts the indwelling needle into the patient's vein, the inner ring 2 can be put on the patient's arm. The four first threaded rods 8 can support the transparent waterproof sleeve 3, so that the transparent waterproof sleeve 3 can also be put on the patient's arm;

[0036] S5: Screw the sleeve 17 onto the first threaded rod 8 above the arm using the internal thread, and adjust the horizontal position of the sleeve 17 according to the position of the needle, so as to drive the strong elastic sleeve 26 to move synchronously;

[0037] S6: The position of the connector 25 is adjusted by rotating the flexible connecting rod 24, and the needle holder of the indwelling needle is inserted into the strong elastic sleeve 26. Then, the excess infusion tube can be passed between the top cover 20 and the bottom cover 23. The bottom cover 23 is rotated to make the threaded column 22 rise in the inner cavity of the threaded barrel 21, thereby closing the top cover 20 and the bottom cover 23. The infusion tube is clamped by the tube clamping grooves 27 on both sides.

[0038] S7: After the medical staff has installed and fixed the indwelling needle, the transparent waterproof sleeve 3 can be lowered to cover the indwelling needle, and the two straps 4 on both sides can be pulled together, and the Velcro thorn surface 5 can be adhered to the adjacent Velcro hair surface 30, so that the two sides of the transparent waterproof sleeve 3 can be tightened.

[0039] Working principle: When using the present invention, first, put the inner ring 2 into the inner cavity of the transparent waterproof sleeve 3, then, put the outer ring 1 on the outer side of the transparent waterproof sleeve 3 and align it with the inner ring 2, then, pass the four square rods 7 and the first threaded rod 8 through the square hole inner cavity on the inner ring 2 respectively, and make the four positioning plates 9 fit with the left side of the inner ring 2. When the medical staff turns the four knobs 14 in turn, the adjacent second threaded rod 13 can be driven to rotate, and the rotation of the second threaded rod 13 can push the circular plate 12 to slide and approach the inner ring 2, and the circular plate 12 The sliding can drive the L-shaped cone nail 16 to move synchronously, and the L-shaped cone nail 16 is inserted into the inner cavity of the adjacent annular groove 10 after passing through the transparent waterproof sleeve 3, so that the outer ring 1, the inner ring 2 and the transparent waterproof sleeve 3 are assembled together. At the same time, it is convenient to disassemble and replace the transparent waterproof sleeve 3, so that the positioning structure is reusable and safe and hygienic to use. After the medical staff inserts the indwelling needle into the patient's vein, the inner ring 2 can be put on the patient's arm. The transparent waterproof sleeve 3 can be supported by the arrangement of the four first threaded rods 8, so that the The transparent waterproof sleeve 3 is also put on the patient's arm, and the sleeve 17 is screwed into the first threaded rod 8 above the arm using the internal thread. The horizontal position of the sleeve 17 is adjusted according to the position of the needle, thereby driving the strong elastic sleeve 26 to move synchronously. The position of the connector 25 is adjusted by rotating the flexible connecting rod 24, and the needle seat of the indwelling needle is inserted into the strong elastic sleeve 26. Then, the excess infusion tube can be passed between the top cover 20 and the bottom cover 23, and by rotating the bottom cover 23, the threaded column 22 is on the inner cavity of the threaded cylinder 21. The top cover 20 and the bottom cover 23 are lifted up, thereby closing the top cover 20 and the bottom cover 23, and the infusion tube is clamped by the tube clamping grooves 27 on both sides, which not only plays the role of installing and positioning the indwelling needle, but also can store the infusion tube in a regular manner. After the medical staff installs and fixes the indwelling needle, the transparent waterproof sleeve 3 can be lowered to cover the indwelling needle, and by pulling the two straps 4 on both sides together and bonding the Velcro thorn-like surface 5 to the adjacent Velcro hair-like surface 30, the two sides of the transparent waterproof sleeve 3 can be tightened, thereby improving the waterproof effect of the indwelling needle.

Claims

1. A waterproof positioning structure for an indwelling needle, comprising an outer ring (1) and an inner ring (2) arranged in the inner cavity of the outer ring (1), characterized in that: The outer ring (1) and the inner ring (2) are concentrically arranged, and a transparent waterproof sleeve (3) is movably provided between the outer ring (1) and the inner ring (2). Four square holes are evenly provided on the inner ring (2), and the inner cavities of the four square holes are slidably fitted with square rods (7). The left ends of the four square rods (7) are fixedly connected to positioning plates (9), and the positioning plates (9) are provided with an annular groove (10). The right ends of the four square rods (7) are fixedly connected to first threaded rods (8), and the outer wall of one of the first threaded rods (8) is provided with a sleeve (17), and the inner cavity of the sleeve (17) is provided with a The sleeve (17) has an internal thread that matches the first threaded rod (8), and the sleeve (17) is screwed and fixed to the first threaded rod (8) through the internal thread. The outer wall of the sleeve (17) is provided with a rotating ring (18) that fits therewith. The outer wall of the sleeve (17) is sleeved and fixed with two fixed rings (19) arranged on the left and right sides. The two fixed rings (19) are respectively fitted on the left and right sides of the rotating ring (18). The outer wall of the rotating ring (18) is fixedly connected with a top cover (20), and the center of the inner cavity of the top cover (20) is fixedly connected with a threaded cylinder (21). The inner cavity of the threaded cylinder (21) is threadedly connected. There is a threaded column (22), and the bottom end of the threaded column (22) is fixedly connected to a bottom cover (23), the bottom of the bottom cover (23) is fixedly connected to a bendable connecting rod (24), and the other end of the bendable connecting rod (24) is fixedly connected to a connector (25), and the other side of the connector (25) is fixedly connected to a strong elastic sleeve (26), the outer ring (1) is provided with four cylindrical cavities (11) aligned with the position of the square hole, and the inner cavity of the cylindrical cavity (11) is rotatably connected to a circular plate (12), and the circular plate (12) is rotatably connected to a second threaded rod (12) at the center of a circle on a side away from the inner ring (2). 3), a threaded hole is provided on one side of the four cylindrical cavities (11) away from the inner ring (2), and the other ends of the four second threaded rods (13) respectively penetrate the inner cavities of adjacent threaded holes and are fixedly connected to knobs (14), and the left sides of the four cylindrical cavities (11) are each provided with a limiting slot, and the inner cavity of the limiting slot is slidably connected to an L-shaped cone nail (16), one end of the four L-shaped cone nails (16) is respectively fixedly connected to the adjacent circular plate (12), and the other ends of the four L-shaped cone nails (16) respectively penetrate the outer wall of the transparent waterproof sleeve (3) and are inserted into the inner cavity of the adjacent annular slot (10).

2. The waterproof positioning structure for an indwelling needle according to claim 1, characterized in that: Two upper and lower straps (4) are fixedly connected to the outer wall of the transparent waterproof sleeve (3) near the left and right sides, the front sides of the two straps (4) at the bottom are fixedly connected to Velcro thorn-like surfaces (5), and the rear sides of the two straps (4) at the top are fixedly connected to Velcro hair-like surfaces (30).

3. The waterproof positioning structure for an indwelling needle according to claim 1, characterized in that: A through hole is provided at the center of the top circle of the top cover (20), and the inner cavity of the through hole is rotatably connected to a limiting rod (28), the bottom end of the limiting rod (28) is fixedly connected to the top end of the threaded column (22), and the top end of the limiting rod (28) is fixedly connected to a limiting plate (29).

4. The waterproof positioning structure for an indwelling needle according to claim 1, characterized in that: The left and right sides of the bottom of the top cover (20) are both provided with pipe clamping grooves (27), and the inner diameter length of the top cover (20) is consistent with the outer diameter length of the bottom cover (23).

5. The waterproof positioning structure for an indwelling needle according to claim 1, characterized in that: An annular soft pad (6) is bonded to the inner wall of the inner ring (2).

6. The waterproof positioning structure for an indwelling needle according to claim 1, characterized in that: An anti-slip sleeve (15) is sleeved and fixed on the outer wall of the knob (14).

7. The waterproof positioning structure for an indwelling needle according to claim 1, characterized in that: The thickness of the annular slot (10) is consistent with the outer diameter length of the L-shaped cone nail (16).

8. A method for using the waterproof positioning structure for an indwelling needle according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: First, place the inner ring (2) into the inner cavity of the transparent waterproof sleeve (3), and then, put the outer ring (1) on the outer side of the transparent waterproof sleeve (3) so that it is aligned with the inner ring (2); S2: Then, the four square rods (7) and the first threaded rod (8) are respectively passed through the inner cavity of the square hole on the inner ring (2), and the four positioning plates (9) are all fitted with the left side of the inner ring (2); S3: When the medical staff rotates the four knobs (14) in sequence, the adjacent second threaded rod (13) can be driven to rotate, and the rotation of the second threaded rod (13) can push the circular plate (12) to slide and approach the inner ring (2), and the sliding of the circular plate (12) can drive the L-shaped cone nail (16) to move synchronously, and the L-shaped cone nail (16) is inserted into the inner cavity of the adjacent annular slot (10) after passing through the transparent waterproof sleeve (3), thereby assembling the outer ring (1), the inner ring (2) and the transparent waterproof sleeve (3) together; S4: After the medical staff inserts the indwelling needle into the patient's vein, the inner ring (2) can be put on the patient's arm. The four first threaded rods (8) can support the transparent waterproof sleeve (3), so that the transparent waterproof sleeve (3) can also be put on the patient's arm; S5: The sleeve (17) is screwed into the first threaded rod (8) above the arm using the internal thread, and the horizontal position of the sleeve (17) is adjusted according to the position of the needle, thereby driving the strong elastic sleeve (26) to move synchronously; S6: The position of the connector (25) is adjusted by rotating the flexible connecting rod (24), and the needle seat of the indwelling needle is inserted into the strong elastic sleeve (26). Then, the redundant infusion tube can be passed between the top cover (20) and the bottom cover (23), and the bottom cover (23) is rotated so that the threaded column (22) rises in the inner cavity of the threaded barrel (21), thereby closing the top cover (20) and the bottom cover (23), and clamping the infusion tube through the tube clamping grooves (27) on both sides; S7: After the medical staff has installed and fixed the indwelling needle, the transparent waterproof sleeve (3) can be lowered to cover the indwelling needle, and the two straps (4) on both sides can be pulled together, and the Velcro thorn surface (5) can be bonded to the adjacent Velcro hair surface (30), so that the two sides of the transparent waterproof sleeve (3) can be tightened.

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