Remaining needle capable of preventing blood return

Abstract

The utility model discloses a blood return prevention indwelling needle, which belongs to the field of medical instruments and comprises a transparent tee joint, a limit groove is arranged on the outer wall of the transparent tee joint, a fixing component is arranged in the limit groove, the transparent tee joint is connected with a catheter, a steel needle is sleeved in the catheter, a branch tube of the transparent tee joint is connected with an extension tube, and the extension tube is connected with a blood return prevention needle. And a flow stopping clip is sleeved on the extension tube. By arranging the fixing assembly, the opening and closing plate can be closed, the position of the opening and closing plate can be adjusted, a force application point for needle withdrawing is provided for a nurse, after needle withdrawing, the opening and closing plate can be opened to be adjusted to a proper position so that an indwelling needle can be fixed conveniently, the indwelling needle can be heightened by adjusting the angle between the opening and closing plate under the situation that heightening is needed, and meanwhile the indwelling needle can be fixed conveniently. The anti-backflow assembly is arranged on the extension tube, backflow can be prevented through the flow stopping clamp, the flow stopping clamp is closed when accidental backflow occurs, then the piston plate slides in the limiting cavity by rotating the disc, and liquid is pushed to flow back to the blood vessel.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of medical devices, concretely is a kind of anti-backflow indwelling needle. BACKGROUND

[0002] Indwelling needle is mainly used to establish long-term intravenous access, which is composed of a soft catheter and a stainless steel puncture guide needle core. The use of indwelling needle can reduce the fear and pain of patients due to repeated puncture, improve the accuracy and efficiency of infusion, and is suitable for patients who need long-term or continuous infusion and have unclear or difficult-to-find veins, which greatly reduces the work burden of medical staff. Therefore, the safety, comfort and convenience of indwelling needle during use are of great concern.

[0003] The prior art also has the following disadvantages:

[0004] 1. The existing indwelling needle is not convenient to operate, the whole is not stable, and in the situation that needs to be raised, the indwelling tube is raised by artificial tape or cotton ball, which is troublesome and has poor stability.

[0005] 2. The existing indwelling needle lacks anti-backflow function, and physiological saline needs to be injected to push back in the face of backflow phenomenon, which is troublesome and lacks an integrated response device. CONTENT OF THE UTILITY MODEL

[0006] In order to overcome the above-mentioned defects, the utility model provides an anti-backflow indwelling needle, which solves the problems of existing indwelling needle that is not easy to withdraw, difficult to fix and lack of anti-backflow response device.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: an anti-backflow indwelling needle, comprising a transparent tee, a limiting groove is arranged on the outer wall of the transparent tee, a fixing assembly is arranged in the limiting groove, a catheter is connected to the transparent tee, a steel needle is sleeved in the catheter, an extension tube is connected to the branch pipe of the transparent tee, a flow-stopping clamp is sleeved on the extension tube, a connecting pipe is communicated on the extension tube between the flow-stopping clamp and the branch pipe of the transparent tee, and an anti-backflow assembly is communicated with the connecting pipe.

[0008] As a further scheme of the utility model: the steel needle is coaxially fixedly connected with a needle holder, and the needle holder is sleeved on the outer wall of the transparent tee.

[0009] As a further scheme of the utility model: the fixing assembly comprises a movable ring slidingly connected in the limiting groove, two opening and closing plates are arranged on the movable ring, and the two opening and closing plates are connected by a hinge.

[0010] As a further scheme of the utility model: a connector is arranged at the output end of the extension tube, and a heparin cap is arranged on the main pipe of the connector.

[0011] As a further scheme of the utility model: the anti-backflow assembly includes a limiting cavity in communication with the connecting pipe, a soft rubber plug plate is arranged on the side of the limiting cavity away from the connecting pipe, a plurality of insertion holes are formed in the soft rubber plug plate, a threaded rod is rotatably connected to the side of the limiting cavity close to the soft rubber plug plate, a piston plate is threadedly connected to the threaded rod, and the piston plate is in interference fit with the limiting cavity.

[0012] As a further scheme of the utility model: the threaded rod is coaxially fixedly connected with a rotating disc at the end away from the connecting pipe, a plurality of through holes are formed in the rotating disc, a fixing pipe is arranged on the outer wall of the limiting cavity, and the fixing pipe is arranged in matching with the insertion holes on the soft rubber plug plate and the through holes on the rotating disc.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1. By arranging the fixing assembly, the opening and closing plate can be closed to provide a fulcrum for nurses to exert force when withdrawing the needle, so that the needle can be conveniently withdrawn, and after the needle is withdrawn, the opening and closing plate can be opened to be adjusted to a suitable position for conveniently fixing the remaining needle, and meanwhile, when the remaining needle needs to be raised, the angle between the opening and closing plates can be adjusted to achieve the purpose.

[0015] 2. The anti-backflow assembly is arranged on the extension pipe, the backflow can be prevented by the flow-stopping clamp, in case of accidental backflow, the flow-stopping clamp can be closed, and then the piston plate can be slid in the limiting cavity by rotating the disc to push the backflow liquid to flow back to the blood vessel. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A three-dimensional structure schematic view of the anti-backflow remaining needle is provided for the utility model;

[0017] Figure 2 A kind of anti-backflow remaining needle is provided for the utility model Figure 1 A part of enlarged structure schematic view in the utility model A is shown;

[0018] Figure 3 A structure schematic view of the anti-backflow assembly part of the anti-backflow remaining needle is provided for the utility model.

[0019] In the drawing: 1 transparent tee, 2 catheter, 3 steel needle, 4 extension pipe, 5 flow-stopping clamp, 6 connecting pipe, 7 needle handle, 8 movable ring, 9 opening and closing plate, 10 connector, 11 heparin cap, 12 limiting cavity, 13 soft rubber plug plate, 14 threaded rod, 15 piston plate, 16 rotating disc, 17 fixing pipe. DETAILED DESCRIPTION

[0020] The technical scheme of the patent will be further described in detail in combination with specific implementation manners.

[0021] As Figures 1-3The utility model provides a technical scheme:

[0022] The transparent tee 1 is provided with a limiting groove on the outer wall, a fixing assembly is arranged in the limiting groove, a catheter 2 is connected to the transparent tee 1, a steel needle 3 is sleeved in the catheter 2, an extension pipe 4 is connected to the branch pipe of the transparent tee 1, a flow stopping clamp 5 is sleeved on the extension pipe 4, a connecting pipe 6 is in communication with the extension pipe 4 between the flow stopping clamp 5 and the branch pipe of the transparent tee 1, an anti-backflow assembly is in communication with the connecting pipe 6, a connector 10 is arranged at the output end of the extension pipe 4, and a heparin cap 11 is arranged on the main pipe of the connector 10;

[0023] Specifically, the limiting groove 1 can limit the position of the internal fixing assembly, the catheter 2 and the sleeved steel needle 3 can enter the blood vessel together, the connector 10 can be connected with the needle of the infusion device, and the heparin cap 11 can realize the functions of reducing blood backflow and anticoagulation, thereby prolonging the use time of the indwelling needle.

[0024] The steel needle 3 is coaxially fixedly connected with a needle holding handle 7, the needle holding handle 7 is sleeved on the outer wall of the transparent tee 1, the fixing assembly comprises a movable ring 8 slidably connected in the limiting groove, two opening and closing plates 9 are arranged on the movable ring 8, and the two opening and closing plates 9 are connected through a hinge;

[0025] Specifically, when the indwelling needle is used, the opening and closing plates 9 can be closed, the opening and closing plates 9 can be adjusted to be arranged at a suitable position through the fixing ring 8, the steel needle 3 can be pushed forward through the needle holding handle 7, the catheter 2 can be driven to enter the skin at the same time, after the pushing is completed, the needle holding handle 7 can be pushed back with the opening and closing plates 9 as a force point, so that the steel needle 3 is taken out, the needle is conveniently withdrawn, the opening and closing plates 9 are adjusted to be opened and fixed, the fixing is more stable, and simultaneously, when it is needed to be raised, the height can be adjusted by adjusting the angle of the opening and closing plates 9.

[0026] The anti-backflow assembly comprises a limiting cavity 12 in communication with the connecting pipe 6, a soft rubber plug plate 13 is arranged on the side, away from the connecting pipe 6, of the limiting cavity 12, a plurality of insertion holes are formed in the soft rubber plug plate, a threaded rod 14 is rotatably connected on the side, close to the soft rubber plug plate 13, of the limiting cavity 12, a piston plate 15 is threadedly connected on the threaded rod 14, and the piston plate 15 is in interference fit with the limiting cavity 12.

[0027] A rotating disc 16 is coaxially fixedly connected to the end, away from the connecting pipe 6, of the threaded rod 14, a plurality of through holes are formed in the rotating disc 16, a fixing pipe 17 is arranged on the outer wall of the limiting cavity 12, and the fixing pipe 17 is arranged in matching with the insertion holes on the soft rubber plug plate 13 and the through holes on the rotating disc.

[0028] Specifically, when blood return occurs, the flow stop clamp 5 can be closed first, and then the rotating disc 16 is rotated to drive the threaded rod 14 fixedly connected thereto to rotate, drive the piston plate 15 threadedly connected with the threaded rod 14 to slide in the limiting cavity 12, thereby pushing back the blood return, and after completion, the fixed tube 17 is inserted into the insertion hole of the soft rubber plug plate 13 through the round hole on the rotating disc 16, so that the rotating disc 16 can be fixed.

[0029] The working principle of the utility model is:

[0030] The limiting groove 1 can limit the position of the internal fixing assembly, the catheter 2 and the sleeved steel needle 3 can enter the blood vessel together, the connector 10 can be connected with the needle of the infusion device, and the heparin cap 11 can realize the functions of reducing blood return and anticoagulation, thereby prolonging the use time of the indwelling needle.

[0031] When the indwelling needle is used, the opening and closing plate 9 can be closed and adjusted to be placed in a suitable position by the fixing ring 8, and then the steel needle 3 is pushed forward through the needle holder 7, and the catheter 2 is driven to enter the skin, after the pushing is completed, the needle holder 7 can be pushed back with the opening and closing plate 9 as the force point, thereby bringing out the steel needle 3, realizing the convenience of needle withdrawal, and then the opening and closing plate 9 is adjusted to be opened for fixation, so that the fixation is more stable, and at the same time, when it is necessary to elevate, the height can be adjusted by adjusting the angle of the opening and closing plate 9.

[0032] When blood return occurs, the flow stop clamp 5 can be closed first, and then the rotating disc 16 is rotated to drive the threaded rod 14 fixedly connected thereto to rotate, drive the piston plate 15 threadedly connected with the threaded rod 14 to slide in the limiting cavity 12, thereby pushing back the blood return, and after completion, the fixed tube 17 is inserted into the insertion hole of the soft rubber plug plate 13 through the round hole on the rotating disc 16, so that the rotating disc 16 can be fixed.

[0033] The above describes the preferred embodiment of the patent in detail, but the patent is not limited to the above-mentioned embodiment, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the patent.

Claims

1. An anti-backflow indwelling needle comprising a transparent tee (1), characterized in that, The outer wall of the transparent tee joint (1) is provided with a limiting groove, a fixing assembly is arranged in the limiting groove, a catheter (2) is connected to the transparent tee joint (1), a steel needle (3) is sleeved in the catheter (2), an extension tube (4) is connected to the branch pipe of the transparent tee joint (1), a flow stopping clamp (5) is sleeved on the extension tube (4), a connecting pipe (6) is in communication with the extension tube (4) between the flow stopping clamp (5) and the branch pipe of the transparent tee joint (1), and an anti-backflow assembly is in communication with the connecting pipe (6).

2. The anti-reflux indwelling needle according to claim 1, characterized in that: The steel needle (3) is coaxially and fixedly connected with a needle holding handle (7), and the needle holding handle (7) is sleeved on the outer wall of the transparent tee joint (1).

3. The anti-reflux indwelling needle according to claim 2, characterized in that: The fixing assembly comprises a movable ring (8) which is slidably connected in the limiting groove, two opening and closing plates (9) are arranged on the movable ring (8), and the two opening and closing plates (9) are connected through a hinge.

4. The anti-reflux indwelling needle according to claim 3, characterized in that: The output end of the extension tube (4) is provided with a connector (10), and a heparin cap (11) is arranged on the main pipe of the connector (10).

5. The anti-reflux indwelling needle according to claim 4, characterized in that: The anti-backflow assembly comprises a limiting cavity (12) which is in communication with the connecting pipe (6), a soft rubber plug plate (13) is arranged on the side of the limiting cavity (12) away from the connecting pipe (6), a plurality of insertion holes are formed in the soft rubber plug plate, a threaded rod (14) is rotatably connected on the side of the limiting cavity (12) close to the soft rubber plug plate (13), a piston plate (15) is threadedly connected on the threaded rod (14), and the piston plate (15) is in interference fit with the limiting cavity (12).

6. The anti-reflux indwelling needle according to claim 5, characterized in that: The threaded rod (14) is coaxially and fixedly connected with a rotating disc (16) on the end away from the connecting pipe (6), a plurality of through holes are formed in the rotating disc (16), a fixing tube (17) is arranged on the outer wall of the limiting cavity (12), and the fixing tube (17) is arranged in matching with the insertion holes on the soft rubber plug plate (13) and the through holes on the rotating disc.

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