CN216148741U - Blood return prevention venous transfusion needle - Google Patents
Blood return prevention venous transfusion needle Download PDFInfo
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- CN216148741U CN216148741U CN202121766554.4U CN202121766554U CN216148741U CN 216148741 U CN216148741 U CN 216148741U CN 202121766554 U CN202121766554 U CN 202121766554U CN 216148741 U CN216148741 U CN 216148741U
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Abstract
The utility model discloses a blood return prevention venous transfusion needle, which solves the problem that blood return needs to be improved in the transfusion process in the prior art. The utility model discloses a contain and prevent back the blood connecting seat, prevent back the blood valve, hose connection spare, the hose, the needle body, wherein prevent back blood connecting seat and hose connection spare and be the penetrating tube-shape body of cavity, nested connection has between the two prevents back the blood valve, prevent back the other end of blood connecting seat and connect the transfer line, hose connection spare's the other end passes through the hose connection needle body, it contains the solid fixed ring of valve body to prevent back the blood valve, the valve body, valve mouth and valve opening, wherein one side of the solid fixed ring of valve body is equipped with the tubulose valve body, the valve mouth is connected to the other end of valve body, the middle part of valve mouth is equipped with the valve opening. The technology realizes the one-way conduction from the blood return prevention connecting seat side to the hose connecting piece side to the liquid medicine in the infusion tube, realizes the interception from the hose connecting piece side to the blood return prevention connecting seat side to the liquid medicine in the infusion tube at the blood side, and achieves the purpose that the blood in the vein can not continuously flow into the hose.
Description
Technical Field
The utility model relates to the field of medical instruments, in particular to a blood return prevention intravenous infusion needle.
Background
At present, the main transfusion needles used in the clinical venous transfusion process comprise a venous transfusion needle, a venous indwelling needle and a special needle for an implanted drug delivery device, and in the transfusion process, because a transfusion bottle is not replaced or the needle is pulled out in time, venous blood can frequently flow back to a blood pipeline due to the position change of a patient, and the blood flowing back can cause the physical and mental discomfort of the patient. Because the blood flows back to the pipeline, the blood coagulation mechanism of the blood can be activated quickly to cause thrombus, so that the pipeline is blocked, even if the thrombus is not cleared in the later transfusion process and enters the blood vessel along with the liquid medicine, venous embolism is likely to be caused, the pain of a patient is increased, and unnecessary medical disputes are caused.
SUMMERY OF THE UTILITY MODEL
The utility model solves the problem that blood return needs to be improved in the infusion process in the prior art, and provides the blood return prevention venous infusion needle which is reasonable in structure, safe and reliable.
The technical scheme of the utility model is to provide a blood return prevention intravenous infusion needle with the following structure: the anti-blood-return valve comprises an anti-blood-return connecting seat, an anti-blood-return valve, a hose connecting piece, a hose and a needle body, wherein the anti-blood-return connecting seat and the hose connecting piece are hollow and permeable tubular bodies, the anti-blood-return valve is connected between the anti-blood-return valve and the hose connecting piece in a nested manner, the other end of the anti-blood-return connecting seat is connected with a transfusion tube, the other end of the hose connecting piece is connected with the needle body through the hose, the anti-blood-return valve comprises a valve body fixing ring, a valve body, a valve nozzle and a valve opening, one side of the valve body fixing ring is provided with a tubular valve body, the other end of the valve body is connected with the valve nozzle, and the middle part of the valve nozzle is provided with the valve opening.
Preferably, the valve opening is in a straight line shape, is made of silica gel, and has a thickness of 0.08mm-0.25 mm.
Preferably, the blood return prevention connecting seat is provided with a heparin cap, an included angle between the central axis of the heparin cap and the central axis of the blood return prevention connecting seat is alpha, wherein alpha is more than or equal to 30 degrees and less than or equal to 60 degrees.
Preferably, the needle body is an intravenous infusion needle, a venous indwelling needle or a needle special for an implantable drug delivery device.
Preferably, the hose is provided with a flow stopping clip.
Preferably, a protective cap is arranged at the opening of the blood return prevention connecting seat.
Preferably, the needle body is externally provided with a sheath.
Compared with the prior art, the blood return prevention intravenous infusion needle has the following advantages:
(1) the blood return prevention valve is used as a middle control piece and realizes one-way conduction from the blood return prevention connecting seat side to the hose connecting piece side for liquid medicine in the infusion tube, and interception is realized from the hose connecting piece side to the blood return prevention connecting seat side for liquid medicine in the infusion tube at the blood side, so that the phenomenon that blood in veins cannot continuously flow to the hose and returns is realized.
(2) Compared with the positive pressure indwelling needle with blood return prevention function in the current market, the device has the same blood return prevention function, but the manufacturing process is simpler than that of the positive pressure indwelling needle, the cost is lower, the treatment cost in clinic can be reduced, and the clinical application has more cost performance.
(3) The blood return prevention valve in the device can be automatically closed after the transfusion is finished, so that the blood is prevented from flowing back to the pipeline, the blood return problem after the transfusion is finished by using a common intravenous transfusion needle and a common implanted special needle for the administration device at present is solved, the transfusion safety is ensured, the pain of a patient is relieved, and the medical dispute caused by the blood return is avoided.
Drawings
FIG. 1 is a schematic sectional view of the blood return prevention valve according to the present invention;
FIG. 2 is a schematic diagram of the working structure of the anti-backflow valve in the forward conduction state;
FIG. 3 is a schematic diagram of the reverse blocking state of the anti-backflow valve according to the present invention;
FIG. 4 is a schematic sectional view of a valve body according to the present invention;
FIG. 5 is a schematic perspective view of a valve body according to the present invention;
FIG. 6 is a schematic view of the structure of the intravenous infusion needle of the present invention;
FIG. 7 is a schematic view of a needle dedicated to the implantable drug delivery device according to the present invention;
FIG. 8 is a schematic structural view of a venous indwelling needle of the present invention;
FIG. 9 is a schematic structural view of the blood return prevention valve with a heparin cap according to the present invention;
fig. 10 is a structural schematic view of the venous indwelling needle with the heparin cap blood return prevention valve in the utility model.
In the description of the attached drawings, the number 1 is a blood return prevention connecting seat, 2 is a blood return prevention valve, 2-1 is a valve opening, 2-2 is a valve nozzle, 2-3 is a valve body, 2-4 is a valve body fixing ring, 3 is a hose connecting piece, 4 is a protective cap, 5 is a hose, 6 is a needle handle, 7 is a needle body, 8 is a protective sleeve, 9 is a flow stopping clamp and 10 is a heparin cap.
Detailed Description
The blood return prevention intravenous infusion needle is further described by combining the attached drawings and the specific embodiment: as shown in the figure, the blood return prevention connecting seat comprises a blood return prevention connecting seat 1, a blood return prevention valve 2, a hose 5 connecting piece 3, a hose 5 and a needle body 7, wherein the blood return prevention connecting seat 1 and the hose 5 connecting piece 3 are hollow and permeable cylindrical bodies, the blood return prevention valve 2 is connected between the two cylindrical bodies in a nested mode, the other end of the blood return prevention connecting seat 1 is connected with a transfusion tube, the other end of the hose 5 connecting piece 3 is connected with the needle body 7 through the hose 5, the blood return prevention valve 2 comprises a valve body fixing ring 2-4, a valve body 2-3, a valve nozzle 2-2 and a valve opening 2-1, a tubular valve body 2-3 is arranged on one side of the valve body fixing ring 2-4, the valve nozzle 2-2 is connected with the other end of the valve body 2-3, and the valve opening 2-1 is arranged in the middle of the valve nozzle 2-2. The valve mouth 2-2 is a transition element connecting the valve opening 2-1 and the valve body 2-3.
The blood return prevention connecting seat 1 and the hose 5 connecting part 3 are both connecting parts connected with a transfusion tube, the transfusion tube at the liquid inlet end is inserted into the inner tube cavity of the blood return prevention connecting seat 1, the transfusion tube at the liquid outlet end is sleeved and inserted into the rigid connecting part inside the hose 5 connecting part 3, the blood return prevention valve 2 is of a structure and principle simulating a valve in a human body vein, is used as an intermediate control part and realizes one-way conduction from the blood return prevention connecting seat 1 side to the hose 5 connecting part 3 side for liquid medicine in the transfusion tube at the blood side, and realizes interception from the hose 5 connecting part 3 side to the blood return prevention connecting seat 1 side for liquid medicine in the transfusion tube at the blood side, so that blood in the vein can not continuously flow to the hose 5 to cause blood return, and the hose 5 is a flow pipeline for liquid medicine in the transfusion process. The valve body fixing ring 2-4 plays a role of sealing a rubber gasket at the joint.
The working principle is that the pressure of the liquid medicine is higher than the pressure of the blood in the venous blood vessel in the infusion process, the liquid medicine flows into the valve body 2-3 to fill the valve body, the pressure of the liquid medicine subtracts the pressure of the forward opening required by the valve opening 2-1, and the liquid medicine is still easy to flow into the venous blood vessel from the infusion bottle, so that the infusion is realized. If the height of the infusion bottle is not enough due to the movement of a patient, the liquid medicine tends to flow into the infusion pipeline from the venous blood vessel, the pressure of the reverse opening is higher, and the valve opening 2-1 cannot be opened if the pressure of the liquid medicine on the venous side is higher than that of the liquid medicine on the infusion side within a certain range.
The pressure intensity of the valve opening 2-1 of the blood return prevention valve 2 to the openings at the two sides is different, because the blood return prevention valve 2 has elasticity, because the liquid medicine is pushed in the transfusion direction, the whole valve nozzle 2-2 is impacted by one side with larger liquid pressure intensity, the valve nozzle 2-2 can increase the opening of the valve opening 2-1 through micro deformation, and the valve opening 2-1 can be opened only by smaller pressure intensity in the transfusion process. In the reverse blood return prevention process, because the pressure of the liquid medicine is higher than that of the liquid at the side of the infusion bottle when the liquid medicine flows back, the liquid medicine can generate certain compression on the valve nozzle 2-2 in the return direction, and the valve nozzle 2-2 cannot increase the opening degree of the valve opening 2-1 through micro deformation, so that the liquid medicine needs higher pressure to open the valve opening 2-1 in the return process, and experiments in the technology show that the control process can be better realized by setting the thickness of the valve opening 2-1 to be 0.08mm-0.25 mm.
The blood return prevention valve 2 is made of silicon rubber, the Shore hardness of the silicon rubber is 35A-45A, a valve opening 2-1 of the blood return prevention valve 2 is a slit shaped like a Chinese character 'yi', and the thickness of the slit is 0.08mm-0.25 mm.
The blood return prevention connecting seat 1 is provided with a heparin cap 10, the included angle between the central axis of the heparin cap and the central axis of the blood return prevention connecting seat 1 is alpha, wherein alpha is more than or equal to 30 degrees and less than or equal to 60 degrees. The heparin cap 10 is matched with the arteriovenous indwelling needle, can be punctured for transfusion for a plurality of times and repeatedly, and can prevent blood backflow and anticoagulation after being injected with heparin sodium.
The needle body 7 is a venous transfusion needle, a venous indwelling needle or a needle special for an implanted drug delivery device, and the blood return prevention valve 2 is connected in series with the lower half part of a transfusion pipeline, so that the needle can be arranged on various venous transfusion occasions.
The hose 5 is provided with a flow stopping clip 9. The flow stop clip 9 is most used with venous indwelling needles.
The opening of the blood return prevention connecting seat 1 is provided with a protective cap 4. The protective cap 4 can prevent the blood return prevention connecting base 1 from being contaminated by impurities or bacteria before use.
The outside of the needle body is provided with a sheath 8. The sheath 8 can prevent the needle body 7 from being polluted by sundries or bacteria before use, and the needle body 7 achieves the effect of being convenient to pinch through the needle handle 6.
Claims (7)
1. The utility model provides a prevent blood return venous transfusion needle which characterized in that: the anti-blood-return valve comprises an anti-blood-return connecting seat, an anti-blood-return valve, a hose connecting piece, a hose and a needle body, wherein the anti-blood-return connecting seat and the hose connecting piece are hollow and permeable tubular bodies, the anti-blood-return valve is connected between the anti-blood-return valve and the hose connecting piece in a nested manner, the other end of the anti-blood-return connecting seat is connected with a transfusion tube, the other end of the hose connecting piece is connected with the needle body through the hose, the anti-blood-return valve comprises a valve body fixing ring, a valve body, a valve nozzle and a valve opening, one side of the valve body fixing ring is provided with a tubular valve body, the other end of the valve body is connected with the valve nozzle, and the middle part of the valve nozzle is provided with the valve opening.
2. The anti-blood return intravenous infusion needle of claim 1, wherein: the valve opening is a straight line, is made of silica gel, and has a thickness of 0.08-0.25 mm.
3. The anti-blood return intravenous infusion needle of claim 1, wherein: the blood return prevention connecting seat is provided with a heparin cap, the included angle between the central axis of the heparin cap and the central axis of the blood return prevention connecting seat is alpha, and the alpha is more than or equal to 30 degrees and less than or equal to 60 degrees.
4. The anti-blood return intravenous infusion needle of claim 1, wherein: the needle body is a venous transfusion needle, a venous indwelling needle or a needle special for an implanted drug delivery device.
5. The anti-blood return intravenous infusion needle of claim 1, wherein: the hose is provided with a flow stopping clamp.
6. The anti-blood return intravenous infusion needle of claim 1, wherein: the opening of the blood return prevention connecting seat is provided with a protective cap.
7. The anti-blood return intravenous infusion needle of claim 1, wherein: the outside of the needle body is provided with a sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121766554.4U CN216148741U (en) | 2021-07-29 | 2021-07-29 | Blood return prevention venous transfusion needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121766554.4U CN216148741U (en) | 2021-07-29 | 2021-07-29 | Blood return prevention venous transfusion needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216148741U true CN216148741U (en) | 2022-04-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121766554.4U Active CN216148741U (en) | 2021-07-29 | 2021-07-29 | Blood return prevention venous transfusion needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216148741U (en) |
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2021
- 2021-07-29 CN CN202121766554.4U patent/CN216148741U/en active Active
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