Remaining needle capable of reducing liquid medicine residues

Abstract

The remaining needle comprises a needle seat, a connecting pipe and a liquid injection three-way pipe, the liquid injection three-way pipe is connected with the needle seat through the connecting pipe, a limiting sleeve is arranged on the outer side of the end, close to the needle seat, of the connecting pipe, an auxiliary cylinder is installed on the outer side of the end, close to the liquid injection three-way pipe, of the connecting pipe, and a control cylinder is installed on the top of the auxiliary cylinder. A pushing assembly used for controlling flowing of liquid medicine in the connecting pipe is arranged in the control cylinder and the auxiliary cylinder, the pushing assembly comprises a sealing block, a push rod, a blocking piece and a limiting spring, the sealing block is clamped in the auxiliary cylinder, the blocking piece is clamped in the control cylinder, and a communicating hole is formed between the inner wall of the auxiliary cylinder and the inner wall of the control cylinder; and the push rod is mounted between the separation blade and the sealing block and is clamped in the communicating hole. By means of the pushing assemblies in the auxiliary cylinder and the control cylinder, residual liquid medicine in the connecting pipe can be injected into the body of a patient after the liquid medicine is injected, and therefore the situation that the liquid medicine is left can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical appliances, in particular to an indwelling needle capable of reducing residual drug solution. Background Art

[0002] Intravenous injection is a common treatment method. Severe patients require multiple injections in a short period of time. The use of indwelling needles can reduce the pain caused by repeated intravenous punctures and the fear of injections in patients.

[0003] After searching, the Chinese patent with announcement number: CN217040939U discloses an indwelling needle. The needle seat is pushed, and the steel needle is inserted into the injection position of the patient. The catheter is guided into the patient's blood vessel. After stabilization, the steel needle is withdrawn, and only the catheter is left in the patient's blood vessel. The medical staff infuses the patient directly through the infusion connector. During the infusion, the infusion switch can control the on-off of the infusion passage, close the channel that is not needed, so that the liquid cannot enter the closed channel, and the space of the infusion passage becomes smaller, which effectively solves the problem of coagulation, thrombosis or blockage during the use of the indwelling needle, and avoids the accumulation of liquid in the infusion connector to form a bacterial culture dish.

[0004] When this patent is actually used, there are the following defects:

[0005] In this patent, part of the liquid medicine will remain in the infusion tube after each injection, and the liquid medicine is not used thoroughly enough. Utility Model Content

[0006] In view of the technical problem in the existing patents that part of the drug solution will remain in the infusion tube after each injection, and the drug solution is not used thoroughly enough, the utility model provides an indwelling needle that can reduce the residual drug solution.

[0007] The technical solution adopted by the utility model is: an indwelling needle capable of reducing residual liquid medicine, comprising a needle seat, a connecting tube and a three-way injection tube, the three-way injection tube is connected to the needle seat through the connecting tube, a limiting sleeve is arranged on the outer side of one end of the connecting tube close to the needle seat, an auxiliary cylinder is installed on the outer side of one end of the connecting tube close to the three-way injection tube, a control cylinder is installed on the top of the auxiliary cylinder, and a pushing component for controlling the flow of liquid medicine in the connecting tube is arranged in the control cylinder and the auxiliary cylinder.

[0008] Furthermore, the pushing assembly includes a sealing block, a push rod, a baffle and a limit spring, the sealing block is clamped in the auxiliary cylinder, the baffle is clamped in the control cylinder, a connecting hole is opened between the inner wall of the auxiliary cylinder and the inner wall of the control cylinder, the push rod is installed between the baffle and the sealing block and clamped in the connecting hole, the limit spring is installed between the baffle and the auxiliary cylinder and is sleeved on the outside of the push rod, and an operating port is opened at the top of the control cylinder.

[0009] Furthermore, a pressing piece is installed on the top of the blocking piece, and the pressing piece is clamped in the operating port.

[0010] Furthermore, a plastic valve sheet is installed at the bottom of the inner wall of the control cylinder.

[0011] Furthermore, a notch is provided on one side of the limiting sleeve, an exhaust pipe clamped in the notch is provided on one side of the connecting pipe, and a plug is provided at one end of the exhaust pipe.

[0012] Furthermore, a flow-stop clamp is provided on the connecting tube, and the flow-stop clamp is located between the needle seat and the limiting sleeve.

[0013] Furthermore, one end and one side of the injection three-way tube are respectively a heparin cap and an end cap.

[0014] The beneficial effects of the utility model are:

[0015] The utility model can inject the residual liquid medicine in the connecting tube into the patient's body after the injection of liquid medicine is completed through the auxiliary tube and the pushing assembly in the control tube, thereby reducing the occurrence of residual liquid medicine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is a three-dimensional diagram of the auxiliary cylinder of the utility model;

[0018] Figure 3 It is a cross-sectional view of the auxiliary cylinder of the utility model;

[0019] Figure 4 It is a stereogram of the pushing component of the utility model.

[0020] The markings in the figure are: 1. needle seat; 2. connecting tube; 3. injection three-way tube; 4. limiting sleeve; 5. auxiliary cylinder; 6. control cylinder; 7. pushing assembly; 701. sealing block; 702. push rod; 703. baffle; 704. limiting spring; 8. operating port; 9. pressing plate; 10. plastic valve plate; 11. exhaust pipe; 12. plug; 13. stop clamp; 14. heparin cap; 15. end cap. DETAILED DESCRIPTION

[0021] In the description of the present invention, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The following is combined with Figure 1-Figure 4 The utility model is further described.

[0024] In order to solve the problems existing in the background technology, the present application proposes the following technical solution: an indwelling needle capable of reducing residual drug solution.

[0025] The specific technical scheme includes a needle seat 1, a connecting tube 2 and an injection three-way tube 3. The injection three-way tube 3 is connected to the needle seat 1 through the connecting tube 2. An indwelling needle sleeve is arranged at the end of the needle seat 1. The indwelling needle sleeve can be retained in the vein after the puncture needle enters the patient's vein. A limiting sleeve 4 is arranged on the outer side of one end of the connecting tube 2 close to the needle seat 1. An auxiliary cylinder 5 is installed on the outer side of one end of the connecting tube 2 close to the injection three-way tube 3. A control cylinder 6 is installed on the top of the auxiliary cylinder 5. The internal space volume of the control cylinder 6 is close to the internal volume of the connecting tube 2. A pushing component 7 for controlling the flow of the drug solution in the connecting tube 2 is arranged in the control cylinder 6 and the auxiliary cylinder 5.

[0026] Reference Figure 2-Figure 4As shown, the pushing assembly 7 includes a sealing block 701, a push rod 702, a baffle 703 and a limit spring 704. The sealing block 701 is clamped in the auxiliary cylinder 5. The bottom shape of the sealing block 701 is an inverted cone shape that fits the bottom structure of the inner wall of the auxiliary cylinder 5. The baffle 703 is clamped in the control cylinder 6. A connecting hole is opened between the inner wall of the auxiliary cylinder 5 and the inner wall of the control cylinder 6. The push rod 702 is installed between the baffle 703 and the sealing block 701 and is clamped in the connecting hole. The limiting spring 704 is installed between the baffle 703 and the auxiliary tube 5 and is sleeved on the outside of the push rod 702. The baffle 703 and the sealing block 701 can be limited by the limiting spring 704. An operation port 8 is opened on the top of the control tube 6, and a pressing plate 9 is installed on the top of the baffle 703. The pressing plate 9 is stuck in the operation port 8. By pressing the pressing plate 9 downward, the gas in the auxiliary tube 5 can be pushed in, so that the residual medicine in the connecting tube 2 can be injected into the patient's body to the greatest extent.

[0027] Reference Figure 3 As shown, a plastic valve sheet 10 is installed at the bottom of the inner wall of the control tube 6. The plastic valve sheet 10 can have a flow-stopping effect, thereby preventing the medicine in the connecting tube 2 from entering the auxiliary tube 5. At the same time, when the pushing component 7 is pushed, the gas in the auxiliary tube 5 can pass through the plastic valve sheet 10 and enter the connecting tube 2.

[0028] Reference Figure 1 As shown, a slot is provided on one side of the limiting sleeve 4, an exhaust pipe 11 is provided on one side of the connecting pipe 2 and is clamped in the slot, a plug 12 is provided at one end of the exhaust pipe 11, and the gas in the connecting pipe 2 is discharged through the exhaust pipe 11 before injection, thereby preventing the gas from entering the patient's body.

[0029] A flow stop clamp 13 is provided on the connecting tube 2, and a hole groove with an inner diameter increasing successively is opened in the flow stop clamp 13. When the connecting tube 2 is located in a larger space, the internal medicine liquid can flow normally, and when it is located in a smaller space, it can have a flow stop effect. The flow stop clamp 13 is located between the needle seat 1 and the limiting sleeve 4. The flow stop clamp 13 can stop the flow of medicine liquid in the connecting tube 2 when needed.

[0030] One end and one side of the injection three-way tube 3 are respectively provided with a heparin cap 14 and an end cap 15 , through which the liquid medicine can be conveniently injected.

[0031] In order for those skilled in the art to fully understand the technical solution, this application makes the following overall summary:

[0032] When the utility model is in use, after the injection of the medicine is completed, the residual medicine in the connecting tube 2 can be injected into the patient's body through the auxiliary tube 5 and the pushing component 7 in the control tube 6. When in use, the pressing plate 9 is pressed downward, and the pressing plate 9 can push the blocking plate 703 to squeeze the limit spring 704. At the same time, the push rod 702 can drive the sealing block 701 to move downward, so that the gas can pass through the plastic valve sheet 10 into the connecting tube 2 and inject the medicine in the connecting tube 2 into the patient's body. After the injection of the medicine in the connecting tube 2 is completed, the flow stop clamp 13 can be used to clamp the connecting tube 2.

[0033] The standard parts used in the utility model can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0034] Although the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An indwelling needle capable of reducing residual drug solution, comprising a needle seat (1), a connecting tube (2) and a three-way injection tube (3), characterized in that: The injection three-way tube (3) is connected to the needle seat (1) through the connecting tube (2); a limiting sleeve (4) is arranged on the outer side of one end of the connecting tube (2) close to the needle seat (1); an auxiliary cylinder (5) is installed on the outer side of one end of the connecting tube (2) close to the injection three-way tube (3); a control cylinder (6) is installed on the top of the auxiliary cylinder (5); and a pushing component (7) for controlling the flow of the liquid medicine in the connecting tube (2) is arranged inside the control cylinder (6) and the auxiliary cylinder (5).

2. The indwelling needle capable of reducing residual drug solution according to claim 1, characterized in that: The pushing assembly (7) comprises a sealing block (701), a push rod (702), a baffle (703) and a limit spring (704); the sealing block (701) is clamped in the auxiliary cylinder (5); the baffle (703) is clamped in the control cylinder (6); a connecting hole is provided between the inner wall of the auxiliary cylinder (5) and the inner wall of the control cylinder (6); the push rod (702) is installed between the baffle (703) and the sealing block (701) and is clamped in the connecting hole; the limit spring (704) is installed between the baffle (703) and the auxiliary cylinder (5) and is sleeved on the outside of the push rod (702); and an operating port (8) is provided at the top of the control cylinder (6).

3. The indwelling needle capable of reducing residual drug solution according to claim 2, characterized in that: A pressing piece (9) is installed on the top of the blocking piece (703), and the pressing piece (9) is clamped in the operating port (8).

4. The indwelling needle capable of reducing residual drug solution according to claim 1, characterized in that: A plastic valve sheet (10) is installed at the bottom of the inner wall of the control cylinder (6).

5. The indwelling needle capable of reducing residual drug solution according to claim 1, characterized in that: A notch is provided on one side of the limiting sleeve (4), an exhaust pipe (11) is provided on one side of the connecting pipe (2) and is clamped in the notch, and a plug (12) is provided at one end of the exhaust pipe (11).

6. The indwelling needle capable of reducing residual drug solution according to claim 1, characterized in that: The connecting tube (2) is provided with a flow-stopping clamp (13), and the flow-stopping clamp (13) is located between the needle seat (1) and the limiting sleeve (4).

7. The indwelling needle capable of reducing residual drug solution according to claim 1, characterized in that: One end and one side of the injection three-way tube (3) are respectively provided with a heparin cap (14) and an end cap (15).

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