Remaining needle capable of shortening venous blood return path

Abstract

The utility model belongs to the field of indwelling needles, particularly relates to an indwelling needle capable of shortening a venous blood return path, and aims to solve the problems that an existing patient and family members are uncomfortable, frequently ask nursing personnel whether the blood return is normal or not, and the blood return stays at the venous indwelling needle and an indwelling needle extension section for a long time, so that the venous indwelling needle is blocked and thrombus is formed. In order to solve the problems that the blockage of an indwelling needle can cause wounds and pains of the secondary puncture indwelling venous indwelling needle to a patient, consumables are wasted, and the hospitalization cost of the patient is increased, the following scheme is provided: the venous indwelling needle blocking device comprises a pressing mechanism, and the pressing mechanism is arranged in an indwelling needle tube body and is used for driving a heparin plug to block a three-way cavity. When the venous indwelling needle is used, the venous blood return path can be prevented and shortened, the formation of tiny thrombus is prevented, the unease of a patient and family members is avoided, the smoothness of an infusion pipeline is kept, and the pain of the patient caused by a secondary puncture indwelling venous indwelling needle and the increase of the economic burden of the inpatient are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of indwelling needles, in particular to an indwelling needle capable of shortening the path of venous backflow blood. Background Art

[0002] For the indwelling needles currently used clinically, after pre-filling and sealing the tube at the end of infusion, even if there is a stop clamp to clamp the proximal end of the indwelling needle to prevent blood backflow from flowing out, during the clinical use process, through observation and discovery, after the tube is sealed at the end of infusion, when the patient moves appropriately, venous blood will still flow back to the clamping position of the clamp, thus causing the following problems:

[0003] 1. The uneasiness of patients and their families, often asking the nursing staff whether the blood backflow is normal;

[0004] 2. As time goes by, the long-term blood backflow staying at the indwelling needle and the extension section of the indwelling needle will cause the blockage of the indwelling needle and the formation of thrombus;

[0005] 3. The blockage of the indwelling needle will bring the trauma and pain of secondary puncture of the indwelling needle to the patient, as well as the waste of consumables and the increase of the patient's hospitalization cost;

[0006] 4. The formation of thrombus in the indwelling needle may bring unnecessary harm to the patient;

[0007] In view of the above problems, the utility model document proposes an indwelling needle capable of shortening the path of venous backflow blood. Content of the Utility Model

[0008] The utility model provides an indwelling needle capable of shortening the path of venous backflow blood, and solves the disadvantages in the prior art that there is uneasiness among patients and their families, often asking the nursing staff whether the blood backflow is normal, the long-term blood backflow staying at the indwelling needle and the extension section of the indwelling needle will cause the blockage of the indwelling needle and the formation of thrombus, and the blockage of the indwelling needle will bring the trauma and pain of secondary puncture of the indwelling needle to the patient, as well as the waste of consumables and the increase of the patient's hospitalization cost.

[0009] The utility model provides the following technical solutions:

[0010] An indwelling needle capable of shortening the path of venous backflow blood, comprising:

[0011] An indwelling needle tube body, a three-way cavity is opened inside the indwelling needle tube body, a jacking cavity communicated with the three-way cavity is opened inside the indwelling needle tube body, a sliding cavity is opened at the bottom side of the inner wall of the jacking cavity, a heparin plug is slidably connected inside the three-way cavity, a puncture needle communicated with the three-way cavity is arranged at the top of the indwelling needle tube body, and a needle holding handle is arranged at the bottom of the indwelling needle tube body;

[0012] The pressing mechanism is arranged inside the indwelling needle tube body and is used to drive the heparin plug to block the three-way cavity.

[0013] In a possible design, the pressing mechanism includes a fixed cylinder fixedly installed on the inner wall of the sliding cavity. A sliding hole is provided inside the fixed cylinder. A driving rod and a cam are respectively slidably connected inside the sliding hole. A button is fixedly arranged at the bottom end of the driving rod.

[0014] In a possible design, a plurality of protrusions are fixedly arranged on the outer wall of the driving rod. A plurality of chutes for the protrusions to slidably connect are provided on the inner wall of the sliding hole. A plurality of sawteeth are fixedly arranged at the top end of the driving rod. A plurality of tooth-shaped blocks meshing with the sawteeth are fixedly arranged on the outer wall of the bottom end of the cam.

[0015] In a possible design, a jacking rod is slidably connected inside the sliding cavity. The bottom of the jacking rod is in contact with the top of the cam. A central rod is slidably connected inside the jacking cavity. The bottom end of the central rod is in contact with the top end of the cam.

[0016] In a possible design, the top end of the central rod is fixed to the bottom side of the heparin plug. A spring is sleeved on the outer wall of the central rod.

[0017] In a possible design, an extension tube communicating with the three-way cavity is provided on the outer wall of the indwelling needle tube body. A stop clamp is provided on the outer wall of the extension tube.

[0018] In a possible design, one end of the extension tube away from the indwelling needle tube body is communicated with a first connector. A second connector is communicated with the outer wall of the first connector.

[0019] In this application, during use, first insert the puncture needle into the patient's vein by holding the needle handle. The needle handle facilitates the operation of medical staff. The indwelling catheter part in the indwelling needle tube stays in the vein. Subsequently, connect the infusion device through the extension tube. The first joint and the second joint at one end of the extension tube provide a flexible connection method, and different types of infusion devices can be connected according to needs to facilitate the infusion operation. Moreover, the stop clamp on the outer wall of the extension tube can temporarily close the flow of the infusion, which is convenient for medical staff to perform other operations and improves the convenience. After the infusion is completed, first press the button. The pressing of the button will cause the driving rod to move upward in the sliding hole. The stable movement is ensured by the sliding of multiple protrusions in the sliding groove. The movement of the driving rod drives the saw teeth at its top to engage with the toothed block at the bottom of the cam. At the same time, the extension and retraction of the jacking rod and the central rod can be realized by the sliding and rotation of the cam in the sliding hole during the downward and upward movement of the driving rod, thereby pushing the jacking rod and the central rod in contact with its top and jacking them upward. The upward movement of the central rod drives the heparin cap to move upward. The heparin cap is beneficial for blocking the three-way cavity and has an obstructive effect on the extension tube and the puncture needle, thereby preventing and shortening the path of venous backflow blood, eliminating the uneasiness and panic of inpatients after venous backflow when using an indwelling venous needle during hospitalization, preventing the formation of microthrombi, not causing the danger of thrombi to the human body during infusion, avoiding the uneasiness of patients and their families and often asking the nursing staff whether the backflow blood is flowing normally, improving the convenience, and at the same time reducing the coagulation of a small amount of venous backflow blood, maintaining the patency of the infusion pipeline, reducing the pain caused by secondary puncture of the indwelling venous needle to the patient and increasing the economic burden of inpatients, enhancing the applicability. At the same time, when the central rod rises, it will drive the spring on the outer wall to compress. The spring can provide elastic force for the reset of the heparin cap. When it is necessary to restore the patency of the three-way cavity, the medical staff can press the button again. As described above, at this time, the elastic force of the spring can push the central rod and the heparin cap to reset downward, and the cam and the driving rod also move downward to return to the initial position, which is beneficial for relieving the blockage of the three-way cavity, facilitating the medical staff's subsequent infusion operation, and improving the convenience and use effect.

[0020] In this utility model, for the indwelling needle capable of shortening the path of venous backflow blood, through the pressing mechanism, it can prevent and shorten the path of venous backflow blood, thereby eliminating the uneasiness and panic of inpatients after venous backflow when using an indwelling venous needle during hospitalization. At the same time, it is also beneficial for relieving the blockage of the three-way cavity and facilitating the subsequent infusion operation of medical staff;

[0021] In this utility model, for the indwelling needle capable of shortening the path of venous backflow blood, through the setting of the stop clamp, it can temporarily close the flow of the infusion, which is convenient for medical staff to perform other operations and improves the convenience;

[0022] In the present utility model, it is possible to block and shorten the path of venous return blood, prevent the formation of microthrombi, and pose no danger of thrombi to the human body during infusion, avoiding the uneasiness of patients and their families. At the same time, it can reduce the coagulation of a small amount of venous return blood, maintain the patency of the infusion pipeline, and reduce the pain caused by secondary puncture and indwelling of the venous indwelling needle to the patient and the economic burden on inpatients. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 FIG. 1 is a front view structural schematic diagram of an indwelling needle capable of shortening the path of venous return blood provided by an embodiment of the present utility model;

[0024] Figure 2 FIG. 2 is a sectional structural schematic diagram of the indwelling needle tube body of an indwelling needle capable of shortening the path of venous return blood provided by an embodiment of the present utility model;

[0025] Figure 3 FIG. 3 is a structural schematic diagram of a cam of an indwelling needle capable of shortening the path of venous return blood provided by an embodiment of the present utility model;

[0026] Figure 4 FIG. 4 is a sectional structural schematic diagram of a fixing cylinder of an indwelling needle capable of shortening the path of venous return blood provided by an embodiment of the present utility model.

[0027] Reference numerals:

[0028] 1. indwelling needle tube body; 2. three-way cavity; 3. puncture needle; 4. extension tube; 5. first joint; 6. second joint; 7. stop clamp; 8. needle holding handle; 9. sliding cavity; 10. fixing cylinder; 11. sliding hole; 12. driving rod; 13. button; 14. protrusion; 15. chute; 16. serration; 17. cam; 18. toothed block; 19. jacking rod; 20. central rod; 21. spring; 22. heparin plug. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0030] Embodiment 1

[0031] Please refer to Figures 1-4 , an indwelling needle, comprising:

[0032] Indwelling needle tube body 1, a three-way cavity 2 is provided inside the indwelling needle tube body 1, a jacking cavity communicating with the three-way cavity 2 is provided inside the indwelling needle tube body 1, a sliding cavity 9 is provided at the bottom side of the inner wall of the jacking cavity, a heparin plug 22 is slidably connected inside the three-way cavity 2, a puncture needle 3 communicating with the three-way cavity 2 is provided at the top of the indwelling needle tube body 1, and a needle holding handle 8 is provided at the bottom of the indwelling needle tube body 1. The puncture needle 3 is inserted into the patient's vein by holding the needle holding handle 8 by hand. The needle holding handle 8 is convenient for medical staff to operate, and a part of the indwelling catheter in the indwelling needle tube body 1 remains in the vein for later infusion operation.

[0033] Pressing mechanism, the pressing mechanism is arranged inside the indwelling needle tube body 1 for driving the heparin plug 22 to block the three-way cavity 2. The pressing mechanism includes a fixed cylinder 10, the fixed cylinder 10 is fixedly installed on the inner wall of the sliding cavity 9, a sliding hole 11 is provided inside the fixed cylinder 10, a driving rod 12 and a cam 17 are respectively slidably connected inside the sliding hole 11, a button 13 is fixedly arranged at the bottom end of the driving rod 12, a plurality of protrusions 14 are fixedly arranged on the outer wall of the driving rod 12, a plurality of sliding grooves 15 for the protrusions 14 to slide and connect are provided on the inner wall of the sliding hole 11, a plurality of sawteeth 16 are fixedly arranged at the top end of the driving rod 12, and a plurality of tooth-shaped blocks 18 meshing with the sawteeth 16 are fixedly arranged on the outer wall of the bottom end of the cam 17. A jacking rod 19 is slidably connected inside the sliding cavity 9, the bottom of the jacking rod 19 is in contact with the top of the cam 17, and a central rod 20 is slidably connected inside the jacking cavity, and the bottom end of the central rod 20 is in contact with the top end of the cam 17.

[0034] Press the button 13, the pressing of the button 13 will cause the driving rod 12 to move upward in the sliding hole 11, and the stable movement is ensured by the sliding of a plurality of protrusions 14 in the sliding grooves 15. The pressing and rising processes of the driving rod 12 can be realized by the sliding and rotation of the cam 17 in the sliding hole 11 to extend and retract the jacking rod 19 and the central rod, and then push the jacking rod 19 and the central rod 20 in contact with their tops. The rising of the central rod 20 drives the heparin plug 22 to move upward. The heparin plug 22 is beneficial to blocking the three-way cavity 2 and has a blocking effect on the extension tube 4 and the puncture needle 3, thereby preventing and shortening the path of venous backflow blood, eliminating the uneasiness and panic of inpatients after venous blood return during the hospitalization period when using an indwelling venous needle, preventing the formation of microthrombi, reducing the coagulation of a small amount of venous backflow blood, keeping the infusion pipeline unobstructed, and reducing the pain caused by secondary puncture of the indwelling venous needle to the patient and increasing the economic burden of inpatients.

[0035] The top end of the central rod 20 is fixed to the bottom side of the heparin plug 22. A spring 21 is sleeved on the outer wall of the central rod 20. When the central rod 20 ascends, it will drive the spring 21 on the outer wall to be compressed. The spring 21 can provide elastic force for the reset of the heparin plug 22. When it is necessary to restore the patency of the three-way cavity 2, medical staff can press the button 13 again. As described above, at this time, the elastic force of the spring 21 can push the central rod 20 and the heparin plug 22 to reset downward, and the cam 17 and the driving rod 12 also move downward to return to the initial position, which is beneficial to relieve the blockage of the three-way cavity 2 and facilitate the medical staff to perform the infusion operation again.

[0036] This application can be used in the field of indwelling needles and can also be used in other fields applicable to this application.

[0037] Embodiment 2

[0038] Reference Figure 1 , on the basis of Embodiment 1, an improvement is made: an indwelling needle that can shorten the path of venous return blood, which is applied to the field of indwelling needles;

[0039] An extension tube 4 communicating with the three-way cavity 2 is arranged on the outer wall of the indwelling needle tube body 1. A stop clamp 7 is arranged on the outer wall of the extension tube 4. The stop clamp 7 on the outer wall of the extension tube 4 can temporarily close the flow of infusion, facilitating other operations of medical staff and improving the convenience.

[0040] One end of the extension tube 4 away from the indwelling needle tube body 1 is communicated with a first connector 5, and the outer wall of the first connector 5 is communicated with a second connector 6. By connecting the infusion device through the extension tube 4, a flexible connection method is provided through the first connector 5 and the second connector 6 at one end of the extension tube 4, and different types of infusion devices can be connected according to needs to facilitate the infusion operation.

[0041] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention; without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An indwelling needle capable of shortening the path of venous return blood, characterized in that: include: An indwelling needle tube body (1), wherein a three-way cavity (2) is provided inside the indwelling needle tube body (1), a lifting cavity connected to the three-way cavity (2) is provided inside the indwelling needle tube body (1), a sliding cavity (9) is provided on the bottom side of the inner wall of the lifting cavity, a heparin plug (22) is slidably connected inside the three-way cavity (2), a puncture needle (3) connected to the three-way cavity (2) is provided at the top of the indwelling needle tube body (1), and a needle holding handle (8) is provided at the bottom of the indwelling needle tube body (1); A pressing mechanism is arranged inside the indwelling needle tube body (1) and is used to drive the heparin plug (22) to block the three-way cavity (2).

2. The indwelling needle capable of shortening the path of venous return blood according to claim 1, characterized in that: The push mechanism comprises a fixed cylinder (10), the fixed cylinder (10) being fixedly mounted on the inner wall of the sliding cavity (9), a sliding hole (11) being provided inside the fixed cylinder (10), a driving rod (12) and a cam (17) being slidably connected inside the sliding hole (11), and a button (13) being fixedly provided at the bottom end of the driving rod (12).

3. The indwelling needle capable of shortening the path of venous return blood according to claim 2, characterized in that: The outer wall of the driving rod (12) is fixedly provided with a plurality of protrusions (14), the inner wall of the sliding hole (11) is provided with a plurality of sliding grooves (15) for sliding connection of the protrusions (14), the top end of the driving rod (12) is fixedly provided with a plurality of saw teeth (16), and the outer wall of the bottom end of the cam (17) is fixedly provided with a plurality of tooth blocks (18) meshing with the saw teeth (16).

4. The indwelling needle capable of shortening the path of venous return blood according to claim 3, characterized in that: A lifting rod (19) is slidably connected inside the sliding cavity (9), and the bottom of the lifting rod (19) contacts the top of the cam (17). A center rod (20) is slidably connected inside the lifting cavity, and the bottom end of the center rod (20) contacts the top of the cam (17).

5. The indwelling needle capable of shortening the path of venous return blood according to claim 4, characterized in that: The top end of the central rod (20) is fixed to the bottom side of the heparin plug (22), and the outer wall of the central rod (20) is sleeved with a spring (21).

6. The indwelling needle capable of shortening the path of venous return blood according to claim 1, characterized in that: The outer wall of the indwelling needle tube body (1) is provided with an extension tube (4) which is connected to the three-way cavity (2), and the outer wall of the extension tube (4) is provided with a flow-stopping clamp (7).

7. The indwelling needle capable of shortening the path of venous return blood according to claim 6, characterized in that: One end of the extension tube (4) away from the indwelling needle tube body (1) is connected to a first connector (5), and the outer wall of the first connector (5) is connected to a second connector (6).

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