CN106108919B - Blood taking needle backflow preventing structure and counterflow-preventing blood taking needle - Google Patents
Blood taking needle backflow preventing structure and counterflow-preventing blood taking needle Download PDFInfo
- Publication number
- CN106108919B CN106108919B CN201610830595.2A CN201610830595A CN106108919B CN 106108919 B CN106108919 B CN 106108919B CN 201610830595 A CN201610830595 A CN 201610830595A CN 106108919 B CN106108919 B CN 106108919B
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- Prior art keywords
- counterflow
- preventing
- needle
- cylindrical body
- blood taking
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150015—Source of blood
- A61B5/15003—Source of blood for venous or arterial blood
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
- A61B5/150221—Valves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/153—Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/153—Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
- A61B5/154—Devices using pre-evacuated means
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Medical Informatics (AREA)
- Hematology (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Veterinary Medicine (AREA)
- Heart & Thoracic Surgery (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Manufacturing & Machinery (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The present invention relates to a kind of blood taking needle backflow preventing structure and counterflow-preventing blood taking needles, the blood taking needle includes venipuncture needle, rubber plug puncture needle and the backflow preventing structure, backflow preventing structure includes a cylindrical body with internal flow path and is fixed on the counterflow-preventing gum cover of cylindrical body internal flow path one end, the counterflow-preventing gum cover is bottomless straight structure, one end and the cylindrical body internal flow path are tightly connected, the other end is hanging free end, gap is symmetrically arranged at left and right sides of the free end, the free end that the gap limits the counterflow-preventing gum cover forms two symmetrical gates.The present invention makes it have good counterflow-preventing effect, stability is good, securely and reliably by improving to counterflow-preventing gum cover in the prior art.
Description
Technical field
The present invention relates to the field of medical instrument technology, specially a kind of blood taking needle backflow preventing structure and counterflow-preventing blood taking needle.
Background technique
Vacuum blood collector is by vacuum blood collection tube, preceding puncture needle (including puncture needle before staight needle and scalp type), needle holder three
Part forms.Vacuum blood collection tube is prefixed a certain amount of negative pressure in process of production, after current puncture pin puncture enters blood vessel, by
In the suction function in heparin tube, blood is automatically flowed into heparin tube.The pressure of pressure and blood vessel in vacuum blood collection tube is substantially
The equal moment terminates blood sampling, and hereafter, the puncture needle that blood taking needle is connect with vacuum blood collection tube is extracted, and takes off tourniquet.If but first
Take off tourniquet, then since intravascular pressure drastically reduces, Gu the blood in heparin tube may generate adverse current.In addition, adopting
In the case that the position of blood vessel is higher than blood vessel, it is also possible to because potential energy generates adverse current.
To solve the above-mentioned problems, a variety of blood taking needle tools with backflow preventing structure have been invented.Wherein, Patent No.
A kind of blood sampling tool backflow preventing structure and the blood sampling comprising the structure disclosed in 201520030191.6 Chinese invention patent
Needle, key technology are to achieve the purpose that counterflow-preventing using the counterflow-preventing gum cover of a bottomless straight-tube shape, the anti-reverse gummosis
Cover causes its inner wall to be attached together when its inner wall speckles with raffinate, to play the role of counterflow-preventing.
But in actual tests, the counterflow-preventing effect of above structure is poor, can hardly show generating blood back flow
As when block liquid flow path in time, cause the safety of blood sampling tool poor, backflow preventing structure therein performs practically no function, Bu Nengda
To expected technical effect, it is therefore desirable to make improvements.
Summary of the invention
A kind of technical problem to be solved by the invention is to provide using effects good, safe and reliable blood taking needle counterflow-preventing knot
Structure and counterflow-preventing blood taking needle.
To solve the above problems, the technical solution used in the present invention is:
A kind of blood taking needle backflow preventing structure comprising one has the cylindrical body of internal flow path and is fixed on the cylindrical body
The counterflow-preventing gum cover of internal flow path one end, the counterflow-preventing gum cover are bottomless straight structure, in one end and the cylindrical body
Portion's flow path is tightly connected, and the other end is hanging free end, and gap, the gap limit are symmetrically arranged at left and right sides of the free end
The free end of the fixed counterflow-preventing gum cover forms two symmetrical gates.
Preferably, the gap is in isosceles triangle, the gate is the written type of upper wide lower point.
Preferably, the thickness of the gate gradually decreasees from top to bottom.
Preferably, the end of the gate is provided with tab.
Preferably, the shape of the tab is trapezoidal.
A kind of counterflow-preventing blood taking needle comprising blood taking needle backflow preventing structure as described above and be fixed on the cylindrical body
The fixing end of the venipuncture needle of one end, the venipuncture needle and the counterflow-preventing gum cover is located at the same end of the cylindrical body
Portion, the venipuncture needle are communicated with the internal flow path of the counterflow-preventing gum cover, and the other end of the cylindrical body is provided with glue
Puncture needle is filled in, the rubber plug puncture needle is communicated with the internal flow path of the cylindrical body.
Preferably, the venipuncture needle is fixed in the cylindrical body by needle handle.
Preferably, the cylindrical body other end is provided with needle stand, the rubber plug puncture needle is fixedly installed on the needle stand
Above or by hose it is connect with the needle stand.
The beneficial effects of adopting the technical scheme are that
The present invention makes it have good counterflow-preventing effect by improving to counterflow-preventing gum cover in the prior art,
Stability is good, securely and reliably.When blood enters from the fixing end of counterflow-preventing gum cover, fluid flowing can be by the tongue of counterflow-preventing gum cover
Valve is washed open, makes two gate separation, blood being capable of proper flow；When blood stops flowing out, blood in counterflow-preventing gum cover without
When pressure, counterflow-preventing gum cover inner wall speckle with remained blood drop, drop by intermolecular force absorption convergence, cause two oneself
By gate be attached together, the free end of counterflow-preventing gum cover is closed, if there is blood back flow situation, then blood can be first
It enters in the cavity of cylindrical body, the blood gathered in cavity generates pressure, further makes the gate of two absorption fittings close
Contact, plays the role of counterflow-preventing.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is schematic cross-sectional view of the invention；
Fig. 2 is the structural schematic diagram of counterflow-preventing gum cover in Fig. 1；
Fig. 3 is the schematic cross-sectional view of another angle of the present invention；
Fig. 4 is the structural schematic diagram of counterflow-preventing gum cover in Fig. 3；
Fig. 5 is the schematic perspective view of counterflow-preventing gum cover of the present invention；
Fig. 6 is the partial enlargement diagram in the portion A in Fig. 5；
Fig. 7 is counterflow-preventing gum cover attracting state schematic diagram of the present invention.
Wherein: 1 venipuncture needle, 2 needle handles, 3 counterflow-preventing gum covers, 301 gum cover main bodys, 302 gates, 303 gap, 304 small
Tongue piece, 305 barbs, 306 gaps, 4 cavitys, 5 needle stands, 6 rubber plug puncture needles, 7 connector sleeves, 8 cylindrical bodies.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, in the following with reference to the drawings and specific embodiments to hair
It is bright to carry out clear, complete description.
Referring to a kind of blood taking needle shown in attached drawing 1-7, it is internally provided with backflow preventing structure, the backflow preventing structure includes
One has the cylindrical body 8 of internal flow path and is fixed on the counterflow-preventing gum cover 3 of described 8 internal flow path one end of cylindrical body, described anti-
Adverse current gum cover 3 is bottomless straight structure, and one end and 8 internal flow path of cylindrical body are tightly connected, and the other end is hanging
Free end.Described 8 one end of cylindrical body is fixedly installed venipuncture needle 1 by needle handle 2, and the other end is fixedly installed by needle stand 5
There is rubber plug puncture needle 6, the venipuncture needle 1 and rubber plug puncture needle 6 are connected with the internal flow path of the cylindrical body 8, institute
The fixing end for stating venipuncture needle 1 and the counterflow-preventing gum cover 3 is located at the same end of the cylindrical body 8.
The cylindrical body 8 forms internal cavities 4.Described 8 internal flow path one end of cylindrical body is installed with and the inside
The connector sleeve 7 of fluid communication, the counterflow-preventing gum cover 3 are fixedly connected or are integrally formed with the connector sleeve 7.Described is anti-reverse
Gummosis set 3 uses flexible silica gel hose or rubber hose, and the internal diameter of the counterflow-preventing gum cover 3 is 1.5-2.5mm, wall
Thick 0.06-0.1mm, length 5-8mm.By constantly thinking deeply and attempting, the serious shadow of structure of not only counterflow-preventing gum cover 3 is found
Ring its counterflow-preventing effect, preferably, the internal diameter of the counterflow-preventing gum cover 3 be 1.7mm, wall thickness 0.06mm, length 5mm,
Due to being limited by 8 size of cylindrical body, the length of counterflow-preventing gum cover 3 cannot be too long, otherwise can be from the liquid of 8 bottom of cylindrical body
Flowing path outlet is too close, influences counterflow-preventing effect.Wherein, the distance between 3 lowermost end of counterflow-preventing gum cover and cylindrical body 8 should not be small
In 2.5mm.
The top half of the counterflow-preventing gum cover 3 is cylindric gum cover main body 301, and its underpart free end left and right sides is symmetrical
It is provided with gap 303, the free end that the gap 303 limits the counterflow-preventing gum cover 3 forms two symmetrical gates 302, described
The projection of gap 303 is in isosceles triangle, and the gate 302 is the written type of upper wide lower point, and shape and structure is similar to pen nib.
The thickness of the gate 302 gradually decreasees from top to bottom, i.e., its bottom end is relatively thin, is easy to freely swing and deformation,
The end of the gate 302 is provided with tab 304, and the tab 304 is preferably shaped to trapezoidal or swallow-tail form.Tab
304 active area will be far longer than the tip of gate 302, and due to 304 top of tab and gate tip junction compared with
It is narrow, and 304 bottom of tab is wider, therefore its amplitude of fluctuation is big, two tabs 304 are easier to be attached onto, further
Two gates 302 are driven to be attached onto, as shown in Figure 7.
As shown in Figure 5 and Figure 6, the side of the gate 302 being provided with barb 305, barb 305 can tangle drop,
Gate 302 is set to be easy fitting using the effect of drop.Otherwise since it is whole clean smooth, it is not easy to there is droplet of blood wall built-up, because
This, which does not allow to be also easy to produce, yet attaches close phenomenon.As shown in figure 5, in the top position of the gap 303, in gum cover main body 301
On open up and have the gap 306, which can further promote gate 302 to be easy fitting, in addition can also make blood edge
Gap 303 flow down, avoid blood from flying to spill at the top of gap 303.
The groove being laterally extended is additionally provided at the top interior of the gate 302, it can be remaining certain in the groove
The blood of amount, since the bottom port of its top gum cover main body 301 is circle, has centainly after two fittings of gates 302
Tension, it is not easy to be crushed, therefore form fluid-tight after the combination of remaining drop, be completely closed.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify to technical solution documented by previous embodiment or equivalent replacement of some of the technical features；And
These are modified or replaceed, the spirit and model of technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (5)
1. a kind of blood taking needle backflow preventing structure, it is characterised in that: it includes a cylindrical body (8) with internal flow path and fixes
Counterflow-preventing gum cover (3) in the cylindrical body (8) internal flow path one end, the counterflow-preventing gum cover (3) are bottomless straight structure,
One end and the cylindrical body (8) internal flow path are tightly connected, and the other end is hanging free end, and the free end left and right sides is right
Title is provided with gap (303), and the free end that the gap (303) limits the counterflow-preventing gum cover (3) forms two symmetrical gates
(301)；The gap (303) is in isosceles triangle, and the gate (302) is the written type of upper wide lower point；The gate (301)
Thickness gradually decrease from top to bottom；The end of the gate (301) is provided with tab (304).
2. blood taking needle backflow preventing structure according to claim 1, it is characterised in that: the shape of the tab (304) is
Trapezoidal, dove-tail form or rectangle.
3. a kind of counterflow-preventing blood taking needle, it is characterised in that: it includes blood taking needle backflow preventing structure as claimed in claim 1 or 2
And it is fixed on the venipuncture needle (1) of the cylindrical body (8) one end, the venipuncture needle (1) and the counterflow-preventing gum cover
(3) fixing end is located at the same end of the cylindrical body (8), the venipuncture needle (1) and the counterflow-preventing gum cover (3)
Internal flow path communicates, and the other end of the cylindrical body (8) is provided with rubber plug puncture needle (6), the rubber plug puncture needle (6) and institute
The internal flow path for the cylindrical body (8) stated communicates.
4. counterflow-preventing blood taking needle according to claim 3, it is characterised in that: the venipuncture needle (1) passes through needle handle
(2) it is fixed on the cylindrical body (8).
5. counterflow-preventing blood taking needle according to claim 4, it is characterised in that: cylindrical body (8) other end is provided with needle
Seat (5), the rubber plug puncture needle (6) are fixedly installed on the needle stand (5) or are connect by hose with the needle stand (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610830595.2A CN106108919B (en) | 2016-09-19 | 2016-09-19 | Blood taking needle backflow preventing structure and counterflow-preventing blood taking needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610830595.2A CN106108919B (en) | 2016-09-19 | 2016-09-19 | Blood taking needle backflow preventing structure and counterflow-preventing blood taking needle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106108919A CN106108919A (en) | 2016-11-16 |
| CN106108919B true CN106108919B (en) | 2019-07-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610830595.2A Expired - Fee Related CN106108919B (en) | 2016-09-19 | 2016-09-19 | Blood taking needle backflow preventing structure and counterflow-preventing blood taking needle |
Country Status (1)
| Country | Link |
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| CN (1) | CN106108919B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108523905A (en) * | 2018-04-28 | 2018-09-14 | 哈尔滨鼓润生物技术有限公司 | A kind of safety blood taking device |
| CN111227847A (en) * | 2020-01-13 | 2020-06-05 | 西京学院 | Anti-reflux venous blood sampling device and anti-reflux method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4134512A (en) * | 1977-06-08 | 1979-01-16 | Becton, Dickinson And Company | One-way evacuated tube stopper |
| JP2005230187A (en) * | 2004-02-18 | 2005-09-02 | Sekisui Chem Co Ltd | Blood sampling needle |
| EP1747755B1 (en) * | 2004-05-17 | 2018-07-04 | Sekisui Chemical Co., Ltd. | Backflow preventing structure of blood sampler, lure needle, blood sampling needle and blood sampling holder |
| CN201591562U (en) * | 2010-01-06 | 2010-09-29 | 王际亮 | Disposable vacuum blood lancet |
| CN102210589A (en) * | 2010-04-09 | 2011-10-12 | 贾宇东 | Duck-billed one-way counterseal supervision blood collector |
| CN201949016U (en) * | 2010-10-09 | 2011-08-31 | 刘文浩 | Arterial blood sample collector |
| CN204562186U (en) * | 2015-01-16 | 2015-08-19 | 河北鑫乐医疗器械科技股份有限公司 | A kind of instrument backflow preventing structure and comprise the blood taking needle of this structure of taking a blood sample |
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2016
- 2016-09-19 CN CN201610830595.2A patent/CN106108919B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN106108919A (en) | 2016-11-16 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190611 Address after: Room 318, Building 868, Huyi Highway, Nanxiang Town, Jiading District, Shanghai, 201802 Applicant after: SHANGHAI HELONG MEDICAL INSTRUMENTS Co.,Ltd. Address before: 517000 Xinwu Village, Shizhen Village Committee, Linzhai Town, Heyuan City, Guangdong Province Applicant before: Chen Jianting |
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| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190712 |
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| CF01 | Termination of patent right due to non-payment of annual fee |