CN212395526U - Anti-backflow venous indwelling needle - Google Patents
Anti-backflow venous indwelling needle Download PDFInfo
- Publication number
- CN212395526U CN212395526U CN202020230373.9U CN202020230373U CN212395526U CN 212395526 U CN212395526 U CN 212395526U CN 202020230373 U CN202020230373 U CN 202020230373U CN 212395526 U CN212395526 U CN 212395526U
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- China
- Prior art keywords
- hole
- elastic membrane
- fixed baffle
- sleeve
- needle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000012528 membrane Substances 0.000 claims abstract description 52
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 10
- 230000000151 anti-reflux effect Effects 0.000 claims abstract description 9
- 239000013013 elastic material Substances 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 8
- 239000007779 soft material Substances 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims 1
- 239000008280 blood Substances 0.000 abstract description 8
- 210000004369 blood Anatomy 0.000 abstract description 8
- 230000004907 flux Effects 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 description 7
- 210000004204 blood vessel Anatomy 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 210000003462 vein Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 206010073753 Fear of injection Diseases 0.000 description 1
- 235000020212 anti-reflux milk formula Nutrition 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003978 infusion fluid Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses an anti-reflux venous indwelling needle, a sleeve is communicated with a body through a one-way conduction mechanism; the unidirectional flux mechanism includes: one end of the conduction pipe is connected with the sleeve, the other end of the conduction pipe is connected with the fixed baffle, and the inner diameter of the conduction pipe is 2 times larger than that of the sleeve; the middle part of the fixed baffle is provided with a first through hole, the fixed baffle is communicated with the body through the first through hole, and the fixed baffle is made of a hard material; the elastic membrane, elastic membrane edge fixed connection is at the switch-on pipe inner wall, and the elastic membrane material is elastic material, and the elastic membrane is parallel with fixed stop, and it has the second through-hole to open on the elastic membrane, and second through-hole diameter is greater than pjncture needle diameter, and the second through-hole does not have with first through-hole crossing when the elastic membrane does not receive external force, and the surface that the second through-hole is close to fixed stop is hugged closely with fixed stop. The problem that blood is easy to flow back to the cannula in the prior art is solved.
Description
Technical Field
The utility model relates to the technical field of medical equipment, especially, relate to a needle is kept somewhere to anti-reflux formula vein.
Background
The venous indwelling needle is also called as a venous trocar, and the use of the venous indwelling needle can reduce the pain of a patient caused by repeated venipuncture and the fear of injection, is convenient for clinical medication and reduces the workload of clinical nurses. The venous indwelling needle is simple and convenient to operate, is suitable for puncture of any position, and is generally applied clinically. The core component part of the venous indwelling needle comprises a body, wherein the body is hollow, two ends of the body are open, and the side wall of the body is communicated with a bifurcated pipe; the sleeve is communicated with the left end opening of the body; the sealing plug is fixedly connected inside the body to seal the right end opening of the body; and the puncture needle penetrates through the sealing plug and then is inserted into the sleeve, and the length of the puncture needle is greater than that of the sleeve. When the puncture needle is used, the cannula and the puncture needle are punctured into a blood vessel, after the cannula completely enters the blood vessel, the puncture needle is retracted, and the cannula is left in the blood vessel so as to carry out infusion treatment.
However, the end of the existing indwelling needle sleeve is open, and has no closing function, and positive pressure is formed in the sleeve only by a nurse when the tube is sealed, so that blood in a human venous blood vessel cannot flow backwards, but the venous blood of an artificial patient is too high or the nurse is not operated properly, venous blood backflow is easily caused in the infusion-free process, backflow venous blood forms small thrombi in the indwelling needle, and then blockage of the indwelling needle is caused, so that liquid cannot flow smoothly, and meanwhile, the small thrombi are easily brought into the blood during infusion, and then thrombi are formed, and harm is caused to the body.
Disclosure of Invention
In order to solve the defects and shortcomings of the prior art, the utility model aims at providing an anti-backflow venous indwelling needle.
The technical scheme of the utility model is that: an anti-reflux venous indwelling needle comprising:
the side wall of the body is communicated with the bifurcated pipe;
the sleeve is communicated with the left end opening of the body;
the sealing plug is fixedly connected inside the body to seal the right end opening of the body;
the puncture needle penetrates through the sealing plug and then is inserted into the sleeve, and the length of the puncture needle is greater than that of the sleeve;
the sleeve is communicated with the body through a one-way conduction mechanism;
the unidirectional flux mechanism includes:
one end of the conduction pipe is connected with the sleeve, the other end of the conduction pipe is connected with the fixed baffle, and the inner diameter of the conduction pipe is 2 times larger than that of the sleeve;
the middle part of the fixed baffle is provided with a first through hole, the fixed baffle is communicated with the body through the first through hole, and the fixed baffle is made of a hard material;
the elastic membrane, elastic membrane edge fixed connection is at the switch-on pipe inner wall, and the elastic membrane material is elastic material, and the elastic membrane is parallel with fixed stop, and it has the second through-hole to open on the elastic membrane, and second through-hole diameter is greater than pjncture needle diameter, and the second through-hole does not have with first through-hole crossing when the elastic membrane does not receive external force, and the surface that the second through-hole is close to fixed stop is hugged closely with fixed stop.
Further, still include:
the hole supporting ring is fixedly connected to the second through hole, the distance between the hole supporting ring and the elastic membrane is larger than the distance between the surface of the elastic membrane and the fixed baffle when the elastic membrane is not subjected to external force, and the second through hole is tightly attached to the fixed baffle through the hole supporting ring;
the groove is formed in one side, close to the elastic membrane, of the fixed baffle plate, the groove is matched with the outer diameter of the supporting hole ring, and the supporting hole ring is matched with the groove when the elastic membrane is not subjected to external force.
Further, the hole supporting ring is made of hard materials.
Further, one side edge of the first through hole close to the elastic membrane is rounded.
Further, the fillet radius is greater than the groove depth.
Further, the conduction pipe is made of soft materials.
Further, the inner side surface of the pipeline, communicated with the body, of the first through hole is an inclined surface, and the inclined surface is connected with the outer surface of the pipeline.
The utility model has the advantages that: compared with the prior art, the utility model discloses a one-way flow of intraductal liquid of cover is realized to the one-way conduction mechanism, when the pjncture needle was located the cover intraductally, the second through-hole cup joints on the pjncture needle and makes the pjncture needle can pass one-way conduction mechanism and get into the sleeve pipe and puncture the blood vessel, when the pjncture needle puncture was accomplished and was extracted, the second through-hole staggers with first through-hole under the elastic force effect of elastic membrane, and the surface contact of second through-hole and fixed stop plate makes the second through-hole seal this moment, if the pressure of sleeve pipe department is greater than body department this moment, but because the existence of elastic membrane, the elastic membrane will block that liquid gets into the body from the sleeve pipe department, the tension of elastic membrane will form resultant force with the pressure; at the moment, if the patient needs to be transfused, the pressure at the body is larger than the pressure at the sleeve, the elastic membrane is deformed towards the direction of the sleeve by the pressure, the second through hole is not closed by the fixed baffle any more, and liquid can flow into the sleeve from the second through hole, so that the human body transfusion is realized. The utility model discloses blood reflux to the sleeve pipe has thoroughly been avoided to operation process is as good as with ordinary vein indwelling needle, does not need the training, does not increase nurse work burden, simple structure low price.
Drawings
FIG. 1 is a schematic structural view of the puncture needle of the present invention inserted into a cannula;
FIG. 2 is a schematic structural view of the puncture needle when the cannula is pulled out;
fig. 3 is a partial schematic view of fig. 2A.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments:
example 1: referring to fig. 1 to 3, an anti-reflux venous indwelling needle includes: the body 1 is hollow, two ends of the body 1 are open, and the side wall of the body 1 is communicated with a bifurcated pipe 6; the sleeve 2 is communicated with the left end opening of the body 1; the sealing plug 4 is fixedly connected inside the body 1 to seal the right end opening of the body 1; the puncture needle 3 penetrates through the sealing plug 4 and then is inserted into the sleeve 2, and the length of the puncture needle 3 is larger than that of the sleeve 2; the sleeve 2 is communicated with the body 1 through a one-way conduction mechanism 5; the unidirectional flux mechanism 5 includes: one end of the conduction pipe 501 is bonded or sleeved with the connection sleeve 2, the other end of the conduction pipe 501 is connected with the fixed baffle 503, and the inner diameter of the conduction pipe 501 is 22 times larger than that of the sleeve; the middle part of the fixed baffle 503 is provided with a first through hole 504, the fixed baffle 503 is communicated with the body 1 through the first through hole 504, and the fixed baffle 503 is made of a hard material; the edge of the elastic membrane 502 is fixedly connected to the inner wall of the conduction tube 501, the elastic membrane 502 is made of elastic materials, the elastic membrane 502 is parallel to the bonding connection baffle 503, a second through hole 507 is formed in the elastic membrane 502, the diameter of the second through hole 507 is larger than that of the puncture needle 3, the second through hole 507 is not intersected with the first through hole 504 when the elastic membrane 502 is not subjected to external force, and the surface, close to the fixing baffle 503, of the second through hole 507 is tightly attached to the fixing baffle 503.
The elastic membrane 502 can be made of medical elastic materials such as TPU, and the fixed baffle 503 can be made of medical hard plastics such as PETG.
The utility model discloses a unidirectional flux of liquid in the sleeve pipe 2 is realized to unidirectional flux mechanism 5, when pjncture needle 3 was located sleeve pipe 2, second through-hole 507 cup jointed on pjncture needle 3 and made pjncture needle 3 can pass unidirectional flux mechanism 5 and get into sleeve pipe 2 and puncture the blood vessel, when pjncture needle 3 puncture was accomplished and was extracted, second through-hole 507 staggers with first through-hole 504 under the elastic force effect of elastic membrane 502, and the surface contact of second through-hole 507 and fixed stop 503 makes second through-hole 507 seal this moment, if the pressure of sleeve pipe 2 department is greater than body 1 department this moment, but because the existence of elastic membrane 502, elastic membrane 502 will block that liquid gets into body 1 from sleeve pipe 2 department, the tension of elastic membrane 502 will form resultant force with the pressure of body 1 department, the size of resultant force equals with sleeve pipe 2 department pressure; at this time, if the patient needs to be transfused, the pressure at the body 1 is greater than the pressure at the cannula 2, and the pressure causes the elastic membrane 502 to deform towards the cannula 2, so that the second through hole 507 is no longer closed by the fixed baffle 503, and the liquid can flow into the cannula 2 from the second through hole 507, thereby realizing the human body transfusion. The utility model discloses thoroughly avoided the blood reflux to sleeve pipe 2 to operation process is kept somewhere the needle as for the sake of no difference with ordinary vein, does not need the training, does not increase nurse work burden, simple structure low price.
Further, still include: the hole supporting ring 505 is fixedly connected to the second through hole 507, when the elastic membrane 502 is not subjected to external force, the distance between the hole supporting ring 505 and the elastic membrane 502 is larger than the distance between the surface of the elastic membrane 502 and the fixed baffle 503, and the second through hole 507 is tightly attached to the fixed baffle 503 through the hole supporting ring 505; the groove 506 is formed in one side, close to the elastic membrane 502, of the fixed baffle 503, the groove 506 is matched with the outer diameter of the hole supporting ring 505, and the position of the hole supporting ring 505 is matched with the groove 506 when the elastic membrane 502 is not subjected to external force.
The hole supporting ring 505 can protect the elastic membrane 502 from being damaged at the second through hole 507, the second through hole 507 can be in closer contact with the fixed baffle 503, and when the puncture needle 3 is inserted into the cannula 2, an operator can change the position of the hole supporting ring 505 by hand to enable the puncture needle 3 to conveniently penetrate through the second through hole 507.
Further, the hole supporting ring 505 is made of hard material.
The hard material allows the operator to easily change the position of the eyelet 505 by hand so that the puncture needle 3 can be easily inserted through the second through hole 507.
Further, a side edge of the first through hole 504 near the elastic membrane 502 is rounded.
The round corners make the hole supporting ring 505 not easily stuck on the first through hole 504, which results in the failure of the unidirectional conduction function.
Further, the fillet radius is greater than the depth of the groove 506.
Further reducing the probability of the grommet 505 getting stuck in the first through-hole 504.
Further, the conduction pipe 501 is made of a soft material. The conduction pipe 501 may be made of medical TPU.
So that an operator can change the position of the hole supporting ring 505 by pressing the hole supporting ring 505 in the conduction pipe 501.
Further, the inner side surface of the pipeline, which is communicated with the body 1 through the first through hole 504, at one end of the body 1 is an inclined surface 7, and the inclined surface 7 is connected with the outer surface of the pipeline.
If the included angle between the end surface of the pipeline and the inner surface of the body 1 is too sharp, air bubbles are remained in the included angle, the air bubbles are possibly input into a human body or bacteria in the air bubbles pollute the infusion liquid, and medical accidents are caused, and the inclined surface 7 can avoid the air bubbles remained in the included angle between the end surface of the pipeline and the inner surface of the body 1.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (7)
1. An anti-reflux venous indwelling needle comprising:
the inner part of the body (1) is hollow, two ends of the body (1) are opened, and the side wall of the body (1) is communicated with the bifurcated pipe (6);
the sleeve (2) is communicated with the left end opening of the body (1);
the sealing plug (4) is fixedly connected inside the body (1) to seal the right end opening of the body (1);
the puncture needle (3) penetrates through the sealing plug (4) and then is inserted into the sleeve (2), and the length of the puncture needle (3) is larger than that of the sleeve (2);
the device is characterized in that the sleeve (2) is communicated with the body (1) through a one-way conduction mechanism (5);
the unidirectional conduction mechanism (5) includes:
one end of the conduction pipe (501) is connected with the sleeve (2), the other end of the conduction pipe (501) is connected with the fixed baffle (503), and the inner diameter of the conduction pipe (501) is 2 times larger than that of the sleeve (2);
the middle part of the fixed baffle (503) is provided with a first through hole (504), the fixed baffle (503) is communicated with the body (1) through the first through hole (504), and the fixed baffle (503) is made of a hard material;
the edge of the elastic membrane (502) is fixedly connected to the inner wall of the conduction tube (501), the elastic membrane (502) is made of elastic materials, the elastic membrane (502) is parallel to the fixed baffle (503), a second through hole (507) is formed in the elastic membrane (502), the diameter of the second through hole (507) is larger than that of the puncture needle (3), the second through hole (507) is not intersected with the first through hole (504) when the elastic membrane (502) is not subjected to external force, and the surface, close to the fixed baffle (503), of the second through hole (507) is tightly attached to the fixed baffle (503).
2. The anti-reflux venous indwelling needle of claim 1, further comprising:
the hole supporting ring (505) is fixedly connected to the second through hole (507), the distance between the hole supporting ring (505) and the elastic membrane (502) is larger than the distance between the surface of the elastic membrane (502) and the fixed baffle (503) when the elastic membrane (502) is not subjected to external force, and the second through hole (507) is tightly attached to the fixed baffle (503) through the hole supporting ring (505);
the groove (506), the groove (506) is opened in one side of the fixed baffle (503) close to the elastic membrane (502), the groove (506) is matched with the outer diameter of the hole supporting ring (505), and the position of the hole supporting ring (505) is matched with the groove (506) when the elastic membrane (502) is free from external force.
3. The anti-reflux venous indwelling needle of claim 2, wherein the grommet (505) is a hard material.
4. The anti-reflux venous indwelling needle of claim 3, wherein one side edge of the first through hole (504) near the elastic membrane (502) is rounded.
5. The anti-reflux venous retention needle as recited in claim 4, wherein the fillet radius is greater than the groove (506) depth.
6. The anti-reflux venous indwelling needle of claim 5, wherein the conducting tube (501) is a soft material.
7. The anti-backflow type venous indwelling needle according to any one of claims 1 to 6, wherein the pipe of the first through hole (504) communicating with the body (1) has a bevel (7) on the inner side surface at one end of the body (1), and the bevel (7) is connected with the outer surface of the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020230373.9U CN212395526U (en) | 2020-02-29 | 2020-02-29 | Anti-backflow venous indwelling needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020230373.9U CN212395526U (en) | 2020-02-29 | 2020-02-29 | Anti-backflow venous indwelling needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212395526U true CN212395526U (en) | 2021-01-26 |
Family
ID=74402114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020230373.9U Expired - Fee Related CN212395526U (en) | 2020-02-29 | 2020-02-29 | Anti-backflow venous indwelling needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212395526U (en) |
-
2020
- 2020-02-29 CN CN202020230373.9U patent/CN212395526U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210126 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |