One-way non-return remaining needle

Abstract

The invention belongs to the technical field of intravenous infusion, and provides a one-way non-return indwelling needle which comprises an indwelling needle body, the indwelling needle body comprises a heparin cap, a protective sleeve is fixedly connected to the heparin cap, an extension tube is connected to the bottom of the heparin cap, the extension tube is sleeved with a water stop clamp, and the end, away from the heparin cap, of the extension tube is connected with an isolation base. A needle holding handle is arranged in the isolation base, a steel needle is arranged in the isolation base, and the end part of the isolation base is fixedly connected with a hose; the magnetic suction one-way valve is arranged in the isolation base, and the magnetic suction one-way valve comprises a shell arranged in the isolation base; by arranging the magnetic one-way valve, when venous pressure rises due to movement of a patient or other reasons, venous blood cannot flow back into the hose due to the fact that the magnetic one-way valve at the tail end of the hose is in a closed state, and the problem that the hose is blocked by blood clots after the venous indwelling needle is indwelled in the body of the patient in clinical work is effectively solved; cost increase caused by repeated indwelling needle puncture is avoided, pain of patients is reduced, and workload of nurses is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of intravenous infusion, in particular to a one-way non-returnable indwelling needle. Background Art

[0002] An indwelling needle, also known as an intravenous catheter or cannula, is an advanced infusion tool that places a soft catheter in the patient's blood vessel through a single puncture, thereby achieving long-term or repeated infusions, blood draws and other operations, reducing the patient's pain caused by repeated venous punctures and the fear of injections. Therefore, indwelling needles are widely used in clinical practice.

[0003] However, in reality, when an indwelling needle is used, the venous pressure may increase due to patient activity or other reasons, causing venous blood to flow back into the hose and causing blood clots to block the tube, causing pain to the patient and increasing the workload of medical staff. For this reason, technical personnel in this field have proposed a one-way non-return indwelling needle to solve the problems raised by the background technology.

[0004] The above information disclosed in this background technology is only used to increase the understanding of the background technology of the present invention and therefore, it may include information that does not constitute the prior art known to ordinary technicians in this field. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a one-way non-returnable indwelling needle to solve the problem in the prior art that venous blood flows back into the hose and causes blood clots to block the hose.

[0006] To achieve the above-mentioned object, the present invention provides a one-way non-returnable indwelling needle, comprising an indwelling needle, the indwelling needle comprising a heparin cap, a sheath fixedly connected to the heparin cap, an extension tube connected to the bottom of the heparin cap, a water stop clamp provided on the outer sleeve of the extension tube, an isolation base connected to the end of the extension tube away from the heparin cap, a needle holding handle provided in the isolation base, a steel needle provided in the isolation base, and a hose fixedly connected to the end of the isolation base;

[0007] A magnetic one-way valve is arranged inside an isolation base, and includes a shell arranged inside the isolation base, an outlet is arranged at the end of the shell, a receiving seat is fixedly connected to the end of the shell, a cover plate is rotatably connected to the receiving seat, and the cover plate is affixed to the outlet.

[0008] Preferably, a first magnetic sheet is fixedly connected to the cover plate, and a second magnetic sheet is fixedly connected to the receiving seat, and the first magnetic sheet is in contact with the second magnetic sheet.

[0009] Preferably, the end of the steel needle is fixedly connected to the needle holding handle, the steel needle passes through the magnetic one-way valve, the needle holding handle is rotatably connected in the isolation base, the hose sleeve is arranged on the outside of the steel needle, and the cover plate completely covers the outlet.

[0010] Preferably, a sealing assembly is provided on the cover plate, and the sealing assembly comprises a circular ring fixedly connected to the cover plate, and a rotating plate is sleeved on the outer side of the circular ring.

[0011] Preferably, a groove is provided on the rotating plate, and a baffle is rotatably connected to the ring.

[0012] Preferably, a fixing block is fixedly connected to the side of the rotating plate, a pushing block is arranged on the cover plate, and an end of the pushing block is fixedly connected to the fixing block.

[0013] Preferably, the groove and the baffle are provided in plurality and are evenly distributed in a circle, one end of the baffle is slidably connected in the groove, and the push block is elastically retractable.

[0014] Preferably, a sealing assembly is provided in the isolation base, and the sealing assembly comprises a connecting tube fixedly connected in the isolation base, a notch is provided on the connecting tube, and a sealing ring is provided in the notch.

[0015] Preferably, a spring is provided in the connecting tube, and an extrusion ring is fixedly connected to the end of the spring.

[0016] Preferably, an insertion groove is provided on the outer shell, the end of the sealing ring is fitted in the insertion groove, and the end of the extrusion ring is arranged as an inclined surface.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention arranges a magnetic one-way valve in the isolation base. During intravenous infusion, the magnetic one-way valve is affected by the gravity of the liquid, the cover of the magnetic one-way valve opens, and the medicine flows into the blood vessel. When the intravenous infusion is completed, the cover is closed after there is no influence of the gravity of the liquid. When the venous pressure rises due to patient activities or other reasons, the venous blood cannot flow back into the hose due to the closed state of the magnetic one-way valve at the end of the hose. This effectively solves the problem of blood clots blocking the intravenous catheter after the catheter is placed in the patient's body in clinical work, avoids the cost increase caused by repeated catheter punctures, reduces patient pain, and alleviates the workload of nurses.

[0019] 2. The present invention sets a plurality of fixed blocks. When the steel needle is pulled out, the push block drives the rotating plate to rotate on the circular ring through the fixed blocks. The rotating plate rotates so that the plurality of grooves provided on the rotating plate squeeze the plurality of baffles, so that the plurality of baffles rotate toward the center of the hole on the cover plate after the steel needle is pulled out, until the plurality of baffles fit together, and the hole on the cover plate is sealed after the steel needle is pulled out. The hole on the cover plate of the magnetic one-way valve can be quickly and effectively closed, thereby preventing the blood in the patient's body from flowing back or leaking through the hole. This function is crucial to maintaining the blood circulation balance in the patient's body and can avoid unnecessary blood loss and potential infection risks.

[0020] 3. The present invention arranges a connecting tube in the isolation base, and under the thrust of the spring, the extrusion ring moves downward and squeezes the sealing ring. The sealing ring is limited by the notch opened on the connecting tube and fits tightly in the insertion groove opened on the outer shell of the magnetic one-way valve, ensuring that the magnetic one-way valve fits tightly in the isolation base, effectively ensuring the sealing of the magnetic one-way valve in the isolation catheter, preventing blood or liquid medicine from flowing back or leaking in the gap between the magnetic one-way valve and the isolation base, reducing the risk of infection for patients, and protecting the safety of patients. The magnetic one-way valve fits tightly in the isolation base, which can maintain the stability of the system pressure and ensure the smooth flow of the fluid.

[0021] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a one-way non-return indwelling needle in an embodiment of the present invention;

[0023] Figure 2 A cross-sectional view of a one-way non-returnable indwelling needle in an embodiment of the present invention;

[0024] Figure 3 It is a structural schematic diagram of a one-way non-return indwelling needle magnetic one-way valve in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of a one-way non-return indwelling needle magnetic one-way valve opened in an embodiment of the present invention;

[0026] Figure 5 This is a structural schematic diagram of a one-way non-return indwelling needle cover assembly according to an embodiment of the present invention;

[0027] Figure 6 A cross-sectional view of a one-way non-returnable indwelling needle cover assembly according to an embodiment of the present invention;

[0028] Figure 7 It is a cross-sectional view of a one-way non-return indwelling needle sealing assembly in an embodiment of the present invention.

[0029] In the figure:

[0030] 1. Indwelling needle; 11. Heparin cap; 12. Sheath; 13. Extension tube; 14. Water stop clamp; 15. Isolation base; 16. Needle handle; 17. Steel needle; 18. Hose;

[0031] 2. Magnetic one-way valve; 21. Shell; 211. Insertion groove; 22. Outlet; 23. Receiver; 24. Cover plate; 25. First magnetic sheet; 26. Second magnetic sheet;

[0032] 3. Covering assembly; 31. Ring; 32. Rotating plate; 33. Channel; 34. Baffle; 35. Fixed block; 36. Push block;

[0033] 4. Sealing assembly; 41. Connecting tube; 42. Notch; 43. Sealing ring; 44. Spring; 45. Extrusion ring. DETAILED DESCRIPTION

[0034] 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 described embodiments are only part of the embodiments of the present invention, not all of the embodiments. It should be pointed out that the drawings are schematic and not drawn to scale. For the sake of clarity and convenience in the figures, the relative sizes and proportions of the parts shown in the figures are exaggerated or reduced in size, and any size is only exemplary and not restrictive.

[0035] Embodiment 1:

[0036] See also Figure 1 - Figure 7As shown, a one-way non-returnable indwelling needle comprises an indwelling needle 1, the indwelling needle 1 comprises a heparin cap 11, a sheath 12 is fixedly connected to the heparin cap 11, an extension tube 13 is connected to the bottom of the heparin cap 11, a water stop clamp 14 is sleeved on the outside of the extension tube 13, an isolation base 15 is connected to the end of the extension tube 13 away from the heparin cap 11, a needle holding handle 16 is arranged in the isolation base 15, a steel needle 17 is arranged in the isolation base 15, a hose 18 is fixedly connected to the end of the isolation base 15, the heparin cap 11 is made of medical plastic material and is used to connect the infusion set, the sheath 12 is used to protect the airtightness of the infusion pipeline, and can also be used as an infusion interface when needed, the extension tube 13 is used to connect the heparin cap 11, and the extension tube 13 is used to connect the heparin cap 11. The plain cap 11 and the isolation base 15, the water stop clamp 14 are used to temporarily close the infusion of the indwelling needle 1 during the infusion process. The isolation base 15 adopts a closed isolation design to prevent leakage. The needle holding handle 16 is provided with anti-skid patterns, which has good anti-skid performance and durability, and is used to ensure that the medical staff can stably hold the indwelling needle 1 during the operation. The steel needle 17 is made of medical 304 stainless steel and has sufficient hardness and sharpness to smoothly pierce the blood vessel during the puncture process. The hose 18 is made of PEP material and stays in the blood vessel after puncturing the blood vessel. It has good elasticity and flexibility, can reduce friction with the blood vessel wall, and reduce stimulation and damage to the blood vessel;

[0037] The magnetic one-way valve 2 is arranged inside the isolation base 15. The magnetic one-way valve 2 includes a shell 21 arranged inside the isolation base 15. An outlet 22 is arranged at the end of the shell 21. A socket 23 is fixedly connected to the end of the shell 21. A cover plate 24 is rotatably connected to the socket 23. The cover plate 24 is attached to the outlet 22. The magnetic one-way valve 2 is used to ensure that the medicine flows toward the blood vessels to prevent blood reflux. The shell 21 is used to accommodate other parts of the magnetic one-way valve 2. The medicine is discharged through the outlet 22. The socket 23 is used to provide support for the cover plate 24. A sealing gasket is provided at the bottom of the cover plate 24 to seal the outlet 22.

[0038] Specifically, a first magnetic sheet 25 is fixedly connected to the cover plate 24, and a second magnetic sheet 26 is fixedly connected to the receiving seat 23. The first magnetic sheet 25 fits with the second magnetic sheet 26, and the first magnetic sheet 25 and the second magnetic sheet 26 attract each other, so that the cover plate 24 rotates on the receiving seat 23 to seal the outlet 22.

[0039] Furthermore, the end of the steel needle 17 is fixedly connected to the needle holding handle 16, the steel needle 17 passes through the magnetic one-way valve 2, the needle holding handle 16 is rotatably connected to the isolation base 15, the hose 18 is sleeved on the outside of the steel needle 17, and the cover plate 24 completely covers the outlet 22.

[0040] As can be seen from the above, when the patient is punctured and infused, first the infusion set is connected to the heparin cap 11, the water stop clamp 14 is pressed, the infusion is temporarily canceled, the medical staff holds the needle handle 16, drives the hose 18 to puncture into the patient's blood vessel through the steel needle 17, pushes out the steel needle 17, and the hose 18 is retained in the blood vessel. The water stop clamp 14 is opened for infusion, and a magnetic one-way valve 2 is set in the isolation base 15. During intravenous infusion, the magnetic one-way valve 2 is affected by the gravity of the liquid, the cover 24 of the magnetic one-way valve 2 is opened, and the medicine flows into the blood vessel. When the intravenous infusion is completed, the cover 24 is closed after there is no influence of the gravity of the liquid. When the patient's activity or other reasons cause the venous pressure to rise, the venous blood cannot flow back into the hose 18 due to the closed state of the magnetic one-way valve 2 at the end of the hose 18, which effectively solves the problem of blood clot blockage after the intravenous indwelling needle 1 is retained in the patient's body in clinical work, avoids the cost increase caused by repeated puncture of the indwelling needle 1, reduces the patient's pain, and reduces the workload of nurses.

[0041] Embodiment 2:

[0042] See also Figure 5 - Figure 6 As shown, this embodiment is basically the same as the previous embodiment, except that a cover assembly 3 is provided on the cover plate 24, and the cover assembly 3 includes a ring 31 fixedly connected to the cover plate 24, and a rotating plate 32 is sleeved on the outside of the ring 31. The ring 31 is used to receive the baffle 34, and the rotating plate 32 is used to drive the baffle 34 to rotate on the ring 31.

[0043] Specifically, a groove 33 is provided on the rotating plate 32, and a baffle 34 is rotatably connected to the ring 31. The groove 33 is used to squeeze the baffle 34, and the baffle 34 is used to seal the hole on the cover plate 24 after the steel needle 17 is pulled out.

[0044] Furthermore, a fixed block 35 is fixedly connected to the side of the rotating plate 32, and a push block 36 is provided on the cover plate 24. The end of the push block 36 is fixedly connected to the fixed block 35. The fixed block 35 is used to drive the rotating plate 32 to rotate on the ring 31, and the push block 36 is used to provide thrust for the fixed block 35.

[0045] Furthermore, there are multiple grooves 33 and baffles 34 that are evenly distributed in a circle. The multiple baffles 34 fit together to be larger than the size of the hole on the cover plate 24 after the steel needle 17 is pulled out. One end of the baffle 34 is slidably connected to the groove 33, and the push block 36 is elastically retractable.

[0046] As can be seen from the above, when the steel needle 17 is pulled out, by setting a plurality of fixed blocks 35, when the steel needle 17 is pulled out, the limiting of the plurality of fixed blocks 35 is cancelled. At this time, under the push of the push block 36, since the fixed block 35 is fixedly connected to the end of the push block 36, the push block 36 pushes the fixed block 35, and the rotating plate 32 is driven by the fixed block 35 to rotate on the ring 31. The rotating plate 32 rotates so that the plurality of grooves 33 opened on the rotating plate 32 squeeze the plurality of baffles 34. Since the plurality of baffles 34 are rotatably connected to the ring 31, the plurality of baffles 34 are squeezed by the plurality of grooves 33 and rotate toward the center of the hole on the cover plate 24 after the steel needle 17 is pulled out, until the plurality of baffles 34 fit together, and the hole on the cover plate 24 after the steel needle 17 is pulled out is covered, so that the hole on the cover plate 24 of the magnetic one-way valve 2 can be quickly and effectively closed, thereby preventing the blood in the patient's body from flowing back or leaking through the hole.

[0047] Embodiment three:

[0048] See also Figure 7 As shown, this embodiment is basically the same as the previous embodiment, with the difference that a sealing assembly 4 is arranged in the isolation base 15, and the sealing assembly 4 includes a connecting tube 41 fixedly connected in the isolation base 15, and a notch 42 is opened on the connecting tube 41, and a sealing ring 43 is arranged in the notch 42. The connecting tube 41 is used to provide support for the sealing assembly 4 and to accommodate other parts of the sealing assembly 4, and the notch 42 is used to receive the sealing ring 43. The sealing ring 43 is elastic and is used to seal the magnetic one-way valve 2.

[0049] Specifically, a spring 44 is provided in the connecting tube 41 , and an extrusion ring 45 is fixedly connected to the end of the spring 44 . The spring 44 is used to provide thrust for the extrusion ring 45 , and the extrusion ring 45 is used to squeeze the sealing ring 43 , so that a part of the sealing ring 43 fits tightly in the insertion groove 211 .

[0050] Furthermore, an insertion groove 211 is provided on the housing 21 , and the end of the sealing ring 43 is fitted in the insertion groove 211 , and the end of the extrusion ring 45 is arranged with an inclined surface.

[0051] As can be seen from the above, by setting a connecting tube 41 in the isolation base 15, under the thrust of the spring 44, the extrusion ring 45 moves downward in the connecting tube 41, and the sealing ring 43 is squeezed due to the inclined surface setting of the extrusion ring 45. The sealing ring 43 is limited by the notch 42 opened on the connecting tube 41, and a part of the sealing ring 43 is squeezed by the extrusion ring 45, and fits tightly in the insertion groove 211 opened on the outer shell 21 of the magnetic one-way valve 2, ensuring that the magnetic one-way valve 2 fits tightly in the isolation base 15, effectively ensuring the sealing of the magnetic one-way valve 2 in the isolation catheter, preventing blood or liquid medicine from flowing back or leaking in the gap between the magnetic one-way valve 2 and the isolation base 15, reducing the risk of infection for patients, protecting the safety of patients, and the magnetic one-way valve 2 fits tightly in the isolation base 15, which can maintain the stability of the system pressure and ensure the smooth flow of the fluid.

[0052] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt 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 contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0053] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0057] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0058] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A one-way non-return indwelling needle, characterized in that: include, An indwelling needle (1), the indwelling needle (1) comprising a heparin cap (11), a sheath (12) fixedly connected to the heparin cap (11), an extension tube (13) connected to the bottom of the heparin cap (11), a water stop clamp (14) sleeved on the outside of the extension tube (13), an isolation base (15) connected to one end of the extension tube (13) away from the heparin cap (11), a needle holding handle (16) arranged in the isolation base (15), a steel needle (17) arranged in the isolation base (15), and a hose (18) fixedly connected to the end of the isolation base (15); A magnetic one-way valve (2), the magnetic one-way valve (2) being arranged inside an isolation base (15), the magnetic one-way valve (2) comprising a shell (21) arranged inside the isolation base (15), an outlet (22) being arranged at the end of the shell (21), a receiving seat (23) being fixedly connected to the end of the shell (21), a cover plate (24) being rotatably connected to the receiving seat (23), and the cover plate (24) being fitted on the outlet (22).

2. A one-way non-returnable indwelling needle according to claim 1, characterized in that: A first magnetic sheet (25) is fixedly connected to the cover plate (24), and a second magnetic sheet (26) is fixedly connected to the receiving seat (23); the first magnetic sheet (25) and the second magnetic sheet (26) are in close contact with each other.

3. A one-way non-returnable indwelling needle according to claim 2, characterized in that: The end of the steel needle (17) is fixedly connected to the needle holding handle (16), the steel needle (17) passes through the magnetic one-way valve (2), the needle holding handle (16) is rotatably connected to the isolation base (15), the hose (18) is sleeved on the outside of the steel needle (17), and the cover plate (24) completely covers the outlet (22).

4. The one-way non-return indwelling needle according to claim 1, characterized in that: A sealing assembly (3) is arranged on the cover plate (24), and the sealing assembly (3) comprises a circular ring (31) fixedly connected to the cover plate (24), and a rotating plate (32) is sleeved on the outside of the circular ring (31).

5. The one-way non-return indwelling needle according to claim 4, characterized in that: The rotating plate (32) is provided with a groove (33), and the ring (31) is rotatably connected with a baffle (34).

6. The one-way non-returnable indwelling needle according to claim 5, characterized in that: A fixed block (35) is fixedly connected to the side of the rotating plate (32), a push block (36) is provided on the cover plate (24), and an end of the push block (36) is fixedly connected to the fixed block (35).

7. The one-way non-returnable indwelling needle according to claim 6, characterized in that: The groove (33) and the baffle (34) are provided in plurality and are evenly distributed in a circumference; one end of the baffle (34) is slidably connected in the groove (33); and the push block (36) is elastically retractable.

8. The one-way non-returnable indwelling needle according to claim 1, characterized in that: A sealing assembly (4) is arranged in the isolation base (15), and the sealing assembly (4) comprises a connecting tube (41) fixedly connected in the isolation base (15), a notch (42) is provided on the connecting tube (41), and a sealing ring (43) is arranged in the notch (42).

9. The one-way non-returnable indwelling needle according to claim 8, characterized in that: A spring (44) is arranged inside the connecting tube (41), and an extrusion ring (45) is fixedly connected to the end of the spring (44).

10. The one-way non-return indwelling needle according to claim 9, characterized in that: The housing (21) is provided with an insertion groove (211), the end of the sealing ring (43) is fitted in the insertion groove (211), and the end of the extrusion ring (45) is arranged in an inclined surface.

Images