Y-type anti-displacement remaining needle
By designing a Y-type anti-displacement indwelling needle, using a core support and spring sheet structure to prevent accidental injury from the needle tip, and using a positioning retaining ring to prevent the displacement of the plug, the safety hazards and drug leakage problems during the use of the indwelling needle are solved, and the safety and stability of use are improved.
Patent Information
- Application Number
- CN202421655496.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-14
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-07-14
AI Technical Summary
During use, existing indwelling needles have the risk of accidental injury to medical staff by the needle tip and the problem of drug leakage.
A Y-type anti-displacement indwelling needle was designed. A core holder and a spring sheet were set to prevent the needle tip from being accidentally pushed out, and a positioning retaining ring was used to prevent the rubber stopper from shifting in the opposite direction during high-pressure injection, thereby achieving safe protection of the needle tip and sealing of the drug solution.
It effectively prevents the needle tip from accidentally injuring the operator and preventing liquid medicine from leaking, thus improving the safety and stability of use.
Smart Images
Figure CN223350703U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a Y-type anti-displacement indwelling needle. Background Art
[0002] In the prior art, some patients require daily intravenous infusions. To alleviate these patients' pain, indwelling catheters, which are fixed to the injection site for multiple days after a single puncture and remain ready for immediate use, have gained widespread attention. However, since the stainless steel needle and tubing used cannot remain in the blood vessel for long periods of time, a current method of using an indwelling catheter is used to avoid daily intravenous punctures. This involves inserting the needle into the blood vessel, which is then guided by the stainless steel needle and tubing. The tubing is then removed, and the stainless steel needle and tubing remain in the blood vessel for approximately seven days. However, with the increasing use of indwelling catheters, safety hazards have emerged. For example, if the needle tubing is withdrawn during removal due to a patient struggle or a doctor's careless operation, the needle tip can accidentally injure the medical staff performing the procedure. Therefore, using indwelling catheters on infectious disease patients presents significant risks to medical staff. Furthermore, during high-pressure injections, the rubber stopper inside the indwelling catheter can often shift due to increased pressure within the catheter hub, resulting in a loose seal and drug leakage. Utility Model Content
[0003] The purpose of the present invention is to provide a Y-type anti-displacement indwelling needle to solve the problems raised in the above background technology.
[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a Y-type anti-displacement indwelling needle, comprising a sleeve, a catheter seat, a needle seat and a stainless steel needle, the stainless steel needle sleeve being arranged in the sleeve, the rear part of the catheter seat being sleeved with the needle seat, the front end of the catheter seat being externally connected to an infusion extension tube, a rubber plug being inserted into the inner cavity of the catheter seat, and the rear part of the catheter seat being coaxially connected to a liner, the liner having a core support and a spring sheet built therein, the stainless steel needle passing through the liner, the rubber plug and the sleeve from the rear end of the needle seat forward, a positioning retaining ring being provided in the catheter seat, and the positioning retaining ring being fixedly connected to the rear end of the catheter seat.
[0005] Preferably, a protrusion is provided on the inner wall of the catheter seat, and a recess is provided on the outer wall of the positioning retaining ring, and the recess is engaged with the protrusion.
[0006] Preferably, a push button protruding to one side is provided beside the front axial hole of the core holder, an upward bend is provided at the front end of the spring sheet, a top groove is provided on the rear upper wall of the catheter seat, and the bend is pushed into the top groove.
[0007] Preferably, the front end of the spring sheet is rolled down the shaft and pressed against the stainless steel needle, the middle part of the spring sheet protrudes upward and presses against the inner wall of the liner, the tail of the liner is provided with a rear needle hole, and a tail plate is provided at the rear of the spring sheet, and the tail plate is clamped on the stainless steel needle passing through the rear needle hole.
[0008] Preferably, the outer wall of the needle seat is connected to the wing via a connecting rib.
[0009] Preferably, a vent hole is opened on the front outer wall of the catheter seat.
[0010] Preferably, the front outer wall of the stainless steel needle has a flat latch, and the outer diameter of the latch is less than or equal to the inner diameter of the sleeve.
[0011] Preferably, the stainless steel needle on the inner wall of the front end of the sleeve has a blood return observation hole.
[0012] Compared with the prior art, the present invention has the following beneficial effects: by providing a core holder and a spring sheet, the present invention can prevent the needle tip from being accidentally pushed out and injuring the operator; by providing a positioning retaining ring, the rubber stopper can be prevented from reverse displacement due to the liquid pressure in the catheter seat during high-pressure injection, thereby preventing leakage of the injection liquid. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the structure of the utility model;
[0014] Figure 2 for Figure 1 Enlarged view of part A;
[0015] Figure 3 for Figure 1 Enlarged view of part B;
[0016] Figure 4 This is a schematic diagram of the positioning retaining ring structure of the utility model;
[0017] Figure 5 for Figure 4 Enlarged view of part C in the middle.
[0018] In the figure: 1. cannula; 2. catheter seat; 21. protrusion; 22. top groove; 3. needle seat; 31. connecting rib; 32. wing; 4. stainless steel needle; 41. latch; 42. blood return observation hole; 5. injection extension tube; 6. rubber plug; 7. liner; 71. rear needle hole; 8. core support; 81. push button; 9. spring leaf; 91 bend; 92. tail plate; 10. positioning retaining ring; 11. concave. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the 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.
[0020] See also Figures 1 to 5 The utility model provides a technical solution: a Y-type anti-displacement indwelling needle, comprising a sleeve 1, a catheter seat 2, a needle seat 3 and a stainless steel needle 4, the stainless steel needle 4 is sleeved in the sleeve 1, the rear part of the catheter seat 2 is sleeved with the needle seat 3, the front end of the catheter seat 2 is externally connected to the infusion extension tube 5, the inner cavity of the catheter seat 2 is inserted with a rubber plug 6, and the rear part of the catheter seat 2 is coaxially connected to the liner 7, the liner 7 has a core support 8 and a spring sheet 9 built in, the stainless steel needle 4 passes through the liner 7, the rubber plug 6 and the sleeve 1 from the rear end of the needle seat 3 to the front, and a positioning retaining ring 10 is provided in the catheter seat 2, and the positioning retaining ring 10 is fixedly connected to the rear end of the catheter seat 2.
[0021] In an embodiment of the present invention, the inner wall of the catheter adapter 2 is provided with a protrusion 21, and the outer wall of the positioning retaining ring 10 is provided with a recess 11, which engages with the protrusion 21. The positioning retaining ring 10 can block the rubber plug 6 during injection, preventing the rubber plug 6 from reverse displacement due to the pressure of the liquid medicine during injection, which could cause leakage.
[0022] In the embodiment of the present utility model, there is a push button 81 protruding to one side next to the front axial hole of the core holder 8, the front end of the spring sheet 9 is provided with an upward bend 91, and the upper wall of the rear side of the catheter seat 2 is provided with a top groove 22, and the bend 91 is pushed into the top groove 22.
[0023] In the embodiment of the present invention, the front end of the spring sheet 9 is rolled down the shaft and pressed against the stainless steel needle 4. The middle portion of the spring sheet 9 protrudes upward and presses against the inner wall of the liner 7. The rear end of the liner 7 has a rear needle hole 71. The rear end of the spring sheet 9 is provided with a tail plate 92, which is clamped on the stainless steel needle passing through the rear needle hole 71. During use, the needle hub 3 is pulled rearward, and the needle tip of the stainless steel needle 4 is retracted along the inner cavity of the cannula 1 into the catheter hub 2 until the rolled-down front end portion of the spring sheet 9 blocks its forward passage. When the needle is pushed forward again, the rolled-down front end portion of the spring sheet 9 under internal pressure blocks the needle tip, preventing the needle tip from passing through, thereby preventing accidental injury to the operator.
[0024] In the embodiment of the present invention, a flat latch 41 is provided on the front outer wall of the stainless steel needle 4 , and the outer diameter of the latch 41 is smaller than or equal to the inner diameter of the sleeve 1 .
[0025] In the embodiment of the present invention, the stainless steel needle 4 on the inner wall of the front end of the cannula 1 has a blood return observation hole 42.
[0026] In the embodiment of the present invention, the outer wall of the needle hub 3 is connected to the wing 32 via a connecting rib 31. During use, when the connecting wing 32 is grasped and pulled out, the latch 41 pulls out the spring plate 9 and the core support 8 connecting the catheter hub 2 and the needle hub 3. Simultaneously, the needle tip enters the protective connector and encloses the needle tip. The catheter hub and the catheter are then left in the patient's body and secured, and the patient is infused through the infusion extension tube 5. The catheter hub is then affixed to the patient with adhesive tape.
[0027] In the embodiment of the present invention, a vent hole is opened on the front outer wall of the catheter seat 2.
[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A Y-type anti-displacement indwelling needle, characterized in that: It includes a sleeve, a catheter seat, a needle seat and a stainless steel needle. The stainless steel needle sleeve is arranged in the sleeve. The rear part of the catheter seat is connected to the needle seat. The front end of the catheter seat is externally connected to the infusion extension tube. The inner cavity of the catheter seat is inserted with a rubber plug, and the rear part of the catheter seat is coaxially connected to the liner. The liner is equipped with a core holder and a spring sheet. The stainless steel needle passes through the liner, rubber plug and sleeve from the rear end of the needle seat to the front. A positioning retaining ring is provided in the catheter seat, and the positioning retaining ring is fixedly connected to the rear end of the catheter seat.
2. A Y-type anti-displacement indwelling needle according to claim 1, characterized in that: The inner wall of the catheter seat is provided with a protrusion, and the outer wall of the positioning retaining ring is provided with a concave, and the concave is clamped with the protrusion.
3. The Y-type anti-displacement indwelling needle according to claim 2, characterized in that: A push button protruding to one side is provided beside the front axial hole of the core holder, an upward bend is provided at the front end of the spring sheet, a top groove is provided on the rear upper wall of the catheter seat, and the bend is pushed into the top groove.
4. The Y-type anti-displacement indwelling needle according to claim 3, characterized in that: The front end of the spring sheet is rolled down the shaft and pressed against the stainless steel needle, the middle part of the spring sheet protrudes upward and presses against the inner wall of the liner, the tail of the liner is provided with a rear needle hole, and the rear part of the spring sheet is provided with a tail plate, which is clamped on the stainless steel needle passing through the rear needle hole.
5. The Y-type anti-displacement indwelling needle according to claim 1, characterized in that: The outer wall of the needle seat is connected to the wing piece through a connecting rib.
6. The Y-type anti-displacement indwelling needle according to claim 1, characterized in that: A vent hole is provided on the front outer wall of the catheter seat.
7. The Y-type anti-displacement indwelling needle according to claim 1, characterized in that: A flat latch is provided on the outer wall of the front portion of the stainless steel needle, and the outer diameter of the latch is smaller than or equal to the inner diameter of the sleeve.
8. The Y-type anti-displacement indwelling needle according to claim 1, characterized in that: The stainless steel needle on the inner wall of the front end of the sleeve is provided with a blood return observation hole.