CN105125224B - Visual blood return backflow prevention bidirectional blood taking needle - Google Patents
Visual blood return backflow prevention bidirectional blood taking needle Download PDFInfo
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- CN105125224B CN105125224B CN201510665684.1A CN201510665684A CN105125224B CN 105125224 B CN105125224 B CN 105125224B CN 201510665684 A CN201510665684 A CN 201510665684A CN 105125224 B CN105125224 B CN 105125224B
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- needle
- blood
- vein
- puncture
- blood sampling
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- 239000008280 blood Substances 0.000 title claims abstract description 86
- 210000004369 blood Anatomy 0.000 title claims abstract description 86
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 15
- 230000000007 visual effect Effects 0.000 title claims abstract description 10
- 230000002265 prevention Effects 0.000 title claims abstract description 6
- 210000003462 vein Anatomy 0.000 claims abstract description 58
- 238000010241 blood sampling Methods 0.000 claims abstract description 27
- 238000001990 intravenous administration Methods 0.000 claims description 21
- 229920005549 butyl rubber Polymers 0.000 claims description 10
- 229920001971 elastomer Polymers 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 230000000151 anti-reflux effect Effects 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 208000015181 infectious disease Diseases 0.000 abstract description 2
- 230000017531 blood circulation Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a visual blood return backflow prevention bidirectional blood taking needle, which comprises a vein needle tube, a vein needle seat, a puncture needle tube and the like, wherein the vein needle seat and the puncture needle seat are fixed together to form a blood taking cavity, and the visual blood return prevention bidirectional blood taking needle is characterized in that: the puncture needle seat and the blood sampling cavity are provided with large support columns, the circular gasket in the blood sampling cavity and the vein needle seat are combined to form a closed inner cavity, and the blood sampling needle tube and the vein needle tube are separated by the circular gasket and are not directly connected and communicated. A small amount of venous blood from the venipuncture is pressed into the transparent or translucent closed lumen through the vein, so that flashback is clearly observed to confirm successful puncture. The invention also has the advantages of preventing the risk of human body external blood flowing back into the human body vein during or after the blood sampling process, reducing the probability of blood infection, and the like, and can effectively solve the problem that the puncture angle or/and depth of the vein needle needs to be adjusted again when the traditional bidirectional blood sampling needle is used for blood sampling due to unsuccessful vein puncture.
Description
Technical Field
The present invention relates to a sterile medical device for clinical blood collection, and more particularly, to a bidirectional lancet in which a blood return function is clearly observed and blood reflux is prevented.
Background
Blood collection needles for clinical blood collection are classified into two types of disposable blood collection needles and common bidirectional blood collection needles.
The disposable blood taking needle is matched with a disposable vacuum blood taking tube for taking human vein blood. The medical staff penetrates the puncture needle on the blood taking needle into the self-sealing rubber plug of the vacuum blood taking tube, so that the vacuum blood taking tube is communicated with the blood taking needle. After the vein needle pierces the vein of the human body, the blood of the vein of the human body is pumped into the vacuum blood collection tube through the puncture needle under the preformed negative pressure effect inside the vacuum blood collection tube (the blood sample pumping process is the vacuum releasing process, and the pumping amount is corresponding to the specification and the vacuum degree of the container). The self-sealing rubber sleeve can realize multi-pipe collection without leakage.
The existing blood taking needle is divided into a soft connection type and a hard connection type. 1. The soft-connected blood taking needle consists of a butyl rubber cap, a puncture needle tube, a transparent hose, a puncture needle seat, a vein needle tube and a protective sleeve, and is convenient for observing blood return due to the transparent connecting hose, but the vacuum degree of a part of vacuum blood taking tube can be consumed due to the large inner cavity volume of the connecting hose, so that the collection amount of the vacuum blood taking tube is reduced. 2. Hard-connected blood taking needle: the needle seat of the vein needle is directly connected with the needle seat of the puncture needle, and the puncture needle seat is made of opaque plastic, so that blood return cannot be observed, but the inner cavity volume of the hard-connected blood taking needle is small, and the influence on the blood taking volume is negligible. In the actual blood sampling process, no matter the hard-connection type or soft-connection type blood sampling needle is adopted, when the blood sampling needle tube is not pulled out after blood collection, blood can flow back from the puncture needle, human blood is polluted, and the human body is injured.
When a medical staff uses a common bidirectional blood taking needle to take blood, the puncture needle sheath is unscrewed, and then the puncture needle seat with one threaded end is screwed with the needle holder. Selecting a part of a patient to be punctured, pricking a tourniquet, and performing conventional disinfection on the punctured part. Taking down the intravenous needle sheath, medical staff removes the needle tip of the exposed intravenous needle according to a certain angle and depth to puncture the vein according to own experience, and pushing the vacuum blood collection tube with negative pressure to the bottom of the needle holder along the inner cavity of the needle holder after the puncture is considered to be successful, so that the needle tube end sleeved with the butyl rubber cap completely penetrates through the rubber plug of the vacuum blood collection tube. At this time, if the previous venipuncture is successful, blood can immediately enter the vacuum blood collection tube; if the previous venipuncture is unsuccessful, no blood enters the vacuum blood collection tube, and the puncture angle or/and depth of the intravenous needle needs to be immediately readjusted at the moment so as to see that the blood is pumped into the vacuum blood collection tube. When the blood sampling needle tube is not pulled out after blood collection, blood can flow back from the puncture needle, pollute human blood and cause injury to human body.
Therefore, when the medical staff uses the common bidirectional blood taking needle to carry out the first venipuncture, the success of the puncture must be ensured, otherwise, the subsequent adjustment of the puncture can be caused, the work of the medical staff is increased, the pain and fear of the patient are also increased, and the mental burden is brought to the medical staff, the patient or the family members of the patient. At the same time, the blood can be prevented from flowing back into the human body to pollute the human body after the blood is collected.
Disclosure of Invention
The invention aims to provide the visual blood return preventing and reversing bidirectional blood taking needle which can clearly observe blood return, prevent blood from flowing back to pollute a human body, has high blood taking success rate and is easy and convenient to operate during venipuncture.
The purpose of the invention is realized in the following way:
the utility model provides a visual blood back anti-reflux bidirectional blood taking needle, including vein needle sheath, vein needle tubing, vein needle file, pjncture needle sheath, pjncture needle file, pjncture needle tubing and butyl rubber cap, vein needle tubing bonds into the vein needle through the outward end of resin glue with the vein needle file, the inward end of "U" shape of vein needle file is fixed closely together through interference fit, bonding, screwing or modes such as welding with the inward end of pjncture needle file, form the blood sampling cavity, pjncture needle tubing bonds into the pjncture needle through the outward end of resin glue with the outer wall threaded pjncture needle file, vein needle file and pjncture needle file are made by transparent or semitransparent material, characterized by: 1-12 large support columns are uniformly distributed in the middle part of the inward end of the puncture needle seat and the blood sampling cavity, and the heights of all the large support columns are the same; the peripheral edge of the circular gasket is horizontally paved on an annular boss on the inner wall of the intravenous needle seat in the blood sampling cavity, and the circular gasket and the inner wall of the outward end of the intravenous needle seat are combined to form a closed inner cavity; the distance between the round pad and the top end of the large support column of the puncture needle stand is 0-2 mm, and the distance between the round pad and the tail end of the inner bottom hole of the vein needle stand is 0-12 mm.
1-12 small support columns are uniformly distributed around the large support column at the inner end of the puncture needle seat and in the blood sampling cavity, and the heights of all the small support columns are the same.
The height of the large support column is 0-5 mm higher than that of the small support column.
The volume of the closed inner cavity between the circular gasket and the vein needle seat is 5-30 times of the inner cavity volume of the vein needle tube.
The butyl rubber cap and the round gasket are made of rubber or silica gel with good rebound resilience.
When the invention is used, the puncture needle sheath is unscrewed, and then the puncture needle seat with one threaded end is screwed with the needle holder. Selecting a part of a patient to be punctured, pricking a tourniquet, and performing conventional disinfection on the punctured part. The venous needle sheath is removed, and the venous needle is used for puncturing veins at a certain angle and depth. When in puncture, because the closed inner cavity between the vein needle and the circular gasket has enough space for vein pressure to compress the air in the closed inner cavity, the vein blood flows into the closed inner cavity until the pressure of the compressed air in the closed inner cavity is equal to the vein pressure, and the vein blood stops flowing. At this time, the medical staff can clearly observe the blood return through the transparent or semitransparent vein needle seat, thereby determining that the puncture is successful. After the puncture is successful, the vacuum blood collection tube with negative pressure is pushed to the bottom of the needle holder along the inner cavity of the needle holder, so that the blood collection needle tube sleeved with the butyl rubber cap completely penetrates through the rubber plug of the vacuum blood collection tube.
At this time, the circular pad for separating the puncture needle and the intravenous needle space makes the blood sampling needle tube and the intravenous needle tube not directly connected and communicated. In the blood sampling process, because the round gasket is subjected to the negative pressure of the vacuum blood sampling tube and the impact and pressure of the blood flow of the human body, the round gasket has a trend of moving towards one side of the puncture needle seat, but because the middle part of the round gasket is supported by the large support column in the middle of the puncture needle seat and is propped against the large support column so as not to move, the periphery of the round gasket is bent and deformed and is lapped on the small support column, so that the blood flows out from the periphery and is not blocked, and the venous blood of the human body is sucked into the vacuum blood sampling tube through the periphery, thereby realizing the blood sampling function. As the vacuum level in the vacuum blood collection tube decays gradually, the circular pad will rebound gradually as well. When the pressure in the vacuum blood collection tube finally reaches the pressure which is equal to the venous pressure of the human body, the circular gasket is fully unfolded and finally seals and separates the space of the puncture needle and the venous needle again, so that the blood outside the human body is prevented from flowing back into the vein of the human body.
Therefore, the invention has the advantages of clearly observing blood return during venipuncture, preventing the risk of human external blood flowing back into the vein of the human body during or after the blood collection process, reducing the probability of blood infection, having high success rate of blood collection and simple and convenient operation, and can effectively solve the problem that the puncture angle or/and depth of the vein needle needs to be adjusted again during blood collection caused by unsuccessful venipuncture when the traditional bidirectional blood collection needle is used for blood collection.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic cross-sectional view of the protective sheath of FIG. 1;
fig. 3 is a schematic cross-sectional view of the intravenous hub;
FIG. 4 is a schematic view of a circular gasket;
fig. 5 is a schematic cross-sectional view of the puncture needle hub;
fig. 6 is a schematic top view of the puncture needle holder.
Detailed Description
The invention will be described in further detail below with reference to examples and with reference to the accompanying drawings.
The utility model provides a visual back blood prevents two-way blood taking needle of countercurrent, including vein needle sheath 1, vein needle tubing 2, vein needle file 3, puncture needle sheath 6, puncture needle file 5, puncture needle tubing 7 and butyl rubber cap 8, vein needle tubing 2 bonds into the vein needle through the resin glue with the outward end of vein needle file 3, the inward end of "U" shape of vein needle file 3 bonds with the inward end of puncture needle file 6 and seals together, form blood sampling cavity 32, puncture needle tubing 7 bonds into the pjncture needle through the resin glue with the outward end of outer wall threaded puncture needle file 5, vein needle file 3 and puncture needle file 6 are made by transparent or semitransparent material, evenly distributed has 4 big support columns 52 in the middle part of puncture needle file 6 towards the inner, the inside of blood sampling cavity 32, the height of all big support columns 52 is the same; the peripheral edge of the circular gasket 4 is horizontally paved on an annular boss 35 on the inner wall of the intravenous needle seat 3 in the blood sampling cavity 32, and the circular gasket 4 and the inner wall of the outward end of the intravenous needle seat 3 are combined to form a closed inner cavity 34; the distance between the circular pad 4 and the top end of the large support column 52 of the puncture needle holder 6 is 2mm, and the distance between the circular pad 4 and the tail end 33 of the inner bottom hole 31 of the intravenous needle holder 3 is 5mm.
The puncture needle tube 7 is fixed on the puncture needle seat 5, and the bottom flat end 71 of the puncture needle tube 7 penetrates into but does not exceed the through hole 51 of the puncture needle seat 5. The butyl cap 8 is tightly fitted over and encloses the entire outer surface of the piercing end 72 of the needle cannula 7. The intravenous needle tube 2 is fixed on the intravenous needle seat 3, and the bottom flat end 21 of the intravenous needle tube 2 penetrates into but does not exceed the inner bottom hole 31 of the intravenous needle seat 3.
8 small support columns 53 are uniformly distributed around the large support column 52 at the inner end of the puncture needle seat 6 and inside the blood sampling cavity 32, and the heights of all the small support columns 53 are the same.
The height of the large support columns 52 is 3mm higher than the height of the small support columns 53.
The volume of the closed inner cavity 34 between the circular gasket 4 and the vein needle seat 3 is 20 times of the volume of the inner cavity 22 of the vein needle tube 2.
The butyl rubber cap 8 and the round gasket 4 are made of rubber or silica gel with good rebound resilience.
The intravenous needle sheath 1 is tightly sleeved with the intravenous needle seat 3 in an interference fit manner so as to protect the puncture end 23 of the intravenous needle tube 2 exposed outside; the lancet sheath 6 is tightly sleeved with the intravenous needle sheath 1 in an interference fit manner so as to protect the puncture end 72 of the lancet tube 7 with the butyl rubber cap 8.
Claims (3)
1. The utility model provides a visual blood back anti-reflux bidirectional blood taking needle, includes vein needle sheath, vein needle tubing, vein needle file, pjncture needle sheath, pjncture needle file, pjncture needle tubing and butyl rubber cap, vein needle tubing bonds into the vein needle through the outward end of resin glue with the vein needle file, the inward end of "U" shape of vein needle file is fixed closely together through interference fit, bonding, screwing or modes such as welding with the inward end of pjncture needle file, form the blood sampling cavity, pjncture needle tubing bonds into pjncture needle through the outward end of resin glue with the outer wall threaded pjncture needle file, vein needle file and pjncture needle file are made by transparent or semitransparent material, its characterized in that: 1-12 large support columns are uniformly distributed in the middle part of the inward end of the puncture needle seat and the blood sampling cavity, and the heights of all the large support columns are the same; the peripheral edge of the circular gasket is horizontally paved on an annular boss on the inner wall of the intravenous needle seat in the blood sampling cavity, and the circular gasket and the inner wall of the outward end of the intravenous needle seat are combined to form a closed inner cavity;
wherein: the distance between the round pad and the top end of the large support column of the puncture needle stand is 0-2 mm, and the distance between the round pad and the tail end of the inner bottom hole of the vein needle stand is 0-12 mm;
1-12 small support columns are uniformly distributed on the periphery of the large support column at the inward end of the puncture needle seat and in the blood sampling cavity, and the heights of all the small support columns are the same;
the height of the large support column is 0-5 mm higher than that of the small support column.
2. The visual back-flow and back-flow prevention bidirectional lancet according to claim 1, wherein: the volume of the closed inner cavity between the circular gasket and the vein needle seat is 5-30 times of the inner cavity volume of the vein needle tube.
3. The visual back-flow and back-flow prevention bidirectional lancet according to claim 1, wherein: the butyl rubber cap and the round gasket are made of rubber or silica gel with good rebound resilience.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510665684.1A CN105125224B (en) | 2015-10-16 | 2015-10-16 | Visual blood return backflow prevention bidirectional blood taking needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510665684.1A CN105125224B (en) | 2015-10-16 | 2015-10-16 | Visual blood return backflow prevention bidirectional blood taking needle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105125224A CN105125224A (en) | 2015-12-09 |
| CN105125224B true CN105125224B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510665684.1A Active CN105125224B (en) | 2015-10-16 | 2015-10-16 | Visual blood return backflow prevention bidirectional blood taking needle |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107582075A (en) * | 2017-10-28 | 2018-01-16 | 刘贞宽 | Disposable pen type anti-reverse flow pattern vein blood taking needle safely |
| CN108324291B (en) * | 2018-03-24 | 2023-12-22 | 曹春荣 | Blood sample collection anti-backflow valve device and blood taking needle |
| CN114073793B (en) * | 2020-09-21 | 2024-05-07 | 至善介入消融技术研究院(南京)有限公司 | Outer needle base and puncture needle using same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202446099U (en) * | 2012-02-21 | 2012-09-26 | 王振民 | Multifunctional visible blood return vacuum vein blood collecting needle |
| CN202604844U (en) * | 2012-04-23 | 2012-12-19 | 江西洪达医疗器械集团有限公司 | Visual blood-return two-way blood-taking needle |
| CN202665548U (en) * | 2012-07-24 | 2013-01-16 | 张中明 | Safe blood taking needle with visible blood return |
| WO2014169433A1 (en) * | 2013-04-16 | 2014-10-23 | Zhang Jianming | Needle cylinder type vacuum blood sampler with slidable puncturing needle seat |
| CN205107705U (en) * | 2015-10-16 | 2016-03-30 | 江西洪达医疗器械集团有限公司 | Visual time prevention and cure of schistosomiasis are two -way blood taking needle against current |
-
2015
- 2015-10-16 CN CN201510665684.1A patent/CN105125224B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202446099U (en) * | 2012-02-21 | 2012-09-26 | 王振民 | Multifunctional visible blood return vacuum vein blood collecting needle |
| CN202604844U (en) * | 2012-04-23 | 2012-12-19 | 江西洪达医疗器械集团有限公司 | Visual blood-return two-way blood-taking needle |
| CN202665548U (en) * | 2012-07-24 | 2013-01-16 | 张中明 | Safe blood taking needle with visible blood return |
| WO2014169433A1 (en) * | 2013-04-16 | 2014-10-23 | Zhang Jianming | Needle cylinder type vacuum blood sampler with slidable puncturing needle seat |
| CN205107705U (en) * | 2015-10-16 | 2016-03-30 | 江西洪达医疗器械集团有限公司 | Visual time prevention and cure of schistosomiasis are two -way blood taking needle against current |
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| Publication number | Publication date |
|---|---|
| CN105125224A (en) | 2015-12-09 |
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