CN204708864U - A kind of instrument backflow preventing structure and comprise its blood taking needle of taking a blood sample - Google Patents
A kind of instrument backflow preventing structure and comprise its blood taking needle of taking a blood sample Download PDFInfo
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- CN204708864U CN204708864U CN201520346680.2U CN201520346680U CN204708864U CN 204708864 U CN204708864 U CN 204708864U CN 201520346680 U CN201520346680 U CN 201520346680U CN 204708864 U CN204708864 U CN 204708864U
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- cylindrical body
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- blood
- backflow preventing
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Abstract
This utility model relates to the blood sampling apparatus field of medical inspection process, be specifically related to a kind of instrument backflow preventing structure and comprise its blood taking needle of taking a blood sample, described blood sampling instrument backflow preventing structure comprises one to be had the cylindrical body of internal flow path and is arranged at the reverse flow prevention section of described cylindrical body internal flow path, described reverse flow prevention section comprises the pedestal of the annular be connected with described cylindrical body inwall, plural elasticity dowel and plug, and described plug is connected with described pedestal by described plural elasticity dowel.Described blood taking needle arranges above-mentioned backflow preventing structure between venipuncture needle and plug puncture needle.Blood sampling instrument backflow preventing structure provided by the utility model and comprise the blood taking needle of this structure, makes blood taking needle have better counterflow-preventing effect, easy to use.
Description
Technical field
This utility model relates to the blood sampling apparatus field of medical inspection process, is specifically related to a kind of instrument backflow preventing structure and comprise its blood taking needle of taking a blood sample.
Background technology
Vacuum blood collector is made up of vacuum test tube, front puncture needle (before comprising staight needle and scalp type puncture needle), needle holder three part.Vacuum test tube is its key component, is mainly used in collection and the preservation of blood preparation.Vacuum test tube is prefixed a certain amount of negative pressure in process of production, and after current lancet puncture intravasation, due to the suction function in blood taking tube, blood flows in blood taking tube automatically.
Pressure in vacuum test tube and the pressure of blood vessel roughly equal moment stop taking a blood sample, and after this, are extracted by the puncture needle that blood taking needle is connected with vacuum test tube, take off tourniquet.If but first take off tourniquet, then because intravascular pressure sharply reduces, Gu the blood in blood taking tube may produce adverse current.In addition, when the position of blood taking tube is higher than blood vessel, also may because potential energy produces adverse current.
Existing backflow preventing structure can not effectively play counterflow-preventing effect, and counterflow-preventing loses structure relative complex, and complex manufacturing technology, production cost is higher.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of structure blood sampling instrument backflow preventing structure simple, with low cost, on the other hand provide a kind of blood taking needle comprising above-mentioned blood sampling instrument backflow preventing structure, structure is simple, counterflow-preventing is effective advantage that it has.
For solving the problem, technical solution adopted in the utility model is:
A kind of blood sampling instrument backflow preventing structure, its key technology is: it comprises one has the cylindrical body of internal flow path and is arranged at the reverse flow prevention section of described cylindrical body internal flow path, described reverse flow prevention section comprises the pedestal of the annular be connected with described cylindrical body inwall, plural elasticity dowel and plug, and described plug is connected with described pedestal by described plural elasticity dowel.
As further improvement of the utility model, described elasticity dowel is 2 ~ 4, and elasticity dowel is uniformly distributed at plug Zhou Yuan.
As further improvement of the utility model, described plug top is tapered, taper type, spherical or cylindrical.
As further improvement of the utility model, described cylindrical body inwall is provided with groove, and the pedestal of described reverse flow prevention section is embedded in described groove.
A kind of blood taking needle, its key technology is: it comprises blood sampling instrument backflow preventing structure as above, is fixed on the venipuncture needle on described cylindrical body top and is fixed on the needle stand of cylindrical body bottom, the end of described venipuncture needle is provided with the extension of column, described extension is resisted against on described plug, described needle stand is provided with plug puncture needle, described plug puncture needle communicates with the internal flow path of described cylindrical body.
As further improvement of the utility model, described venipuncture needle is arranged on needle handle, and described needle handle to be arranged in described cylindrical body or one-body molded with described cylindrical body.
As further improvement of the utility model, the upper end of described extension is fixedly connected with described needle handle top or one-body molded.
A kind of blood taking needle, its its key technology is: it connector comprising blood sampling instrument backflow preventing structure as above, be fixed on the venipuncture needle on described cylindrical body top and arrange described cylindrical body bottom, the end of described venipuncture needle is provided with the extension of column, described extension is resisted against on described plug, described connector has plug puncture needle by hose connection, and described flexible pipe communicates with the internal flow path of described cylindrical body.
As further improvement of the utility model, described venipuncture needle is arranged on needle handle, and described needle handle to be arranged in described cylindrical body or one-body molded with described cylindrical body.
As further improvement of the utility model, the end of described flexible pipe is provided with coupling, and described plug puncture needle is connected with coupling.
The beneficial effect adopting technique scheme to produce is:
Blood sampling instrument backflow preventing structure provided by the utility model and comprise the blood taking needle of this structure, makes blood taking needle have better counterflow-preventing effect, easy to use, safety and sanitation; In use, when plug puncture needle is inserted into after in vacuum test tube, under the effect of negative pressure, make plug produce a downward displacement, thus the port of extension is opened, vein blood taking needle is communicated with the internal flow path of cylindrical body, starts the work of blood collection; After extracting plug puncture needle, negative pressure is eliminated, and under the effect of elasticity dowel, plug resets into home position, by the port shutoff of extension, realizes the effect of counterflow-preventing.Good stability in this utility model use procedure.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model embodiment 1.
Fig. 2 is the structural representation of this utility model embodiment 2.
Fig. 3 is the structural representation of this utility model embodiment 3.
Fig. 4 is the structural representation of this utility model embodiment 4.
Fig. 5 is the structural representation of this reverse flow prevention section embodiment 1.
Fig. 6 is the structural representation of this reverse flow prevention section embodiment 2.
Fig. 7 is the structural representation of this reverse flow prevention section embodiment 3.
Wherein: 1 venipuncture needle, 2 needle handles, 3 reverse flow prevention section, 3-1 pedestal, 3-2 elasticity dowel, 3-3 plug, 4 needle stands, 5 plug puncture needles, 6 resistance blood glue covers, 7 extensions, 8 cylindrical body, 9 cavitys, 10 connectors, 11 flexible pipes, 12 couplings, 13 protective jackets.
Detailed description of the invention
Below in conjunction with accompanying drawing 1-7 and specific embodiment, utility model is described in further detail:
A kind of blood taking needle as shown in Figure 1, it plug puncture needle 5 comprising blood sampling instrument backflow preventing structure, venipuncture needle 1, needle stand 4 and be arranged on described needle stand 4, described plug puncture needle 5, for being inserted in vacuum test tube, is connected with vacuum test tube.Be equipped with airtight resistance blood glue cover 6 outside described plug puncture needle 5, described resistance blood glue overlaps 11 upper ends and is connected with needle stand 5.Plug puncture needle 5 described in the aspect protection of this resistance blood glue cover 11 1 is from pollution, and on the other hand, after plug puncture needle 5 is extracted from vacuum test tube, resistance blood glue overlaps 6 resiliences and received by plug puncture needle 5, prevents remained blood from dripping outward, contaminated environment.
Described backflow preventing structure comprises one to be had the cylindrical body 8 of internal flow path and is arranged at the reverse flow prevention section 3 of described cylindrical body 8 internal flow path, described cylindrical body 8 inside is cavity 9, described reverse flow prevention section 3 comprises pedestal 3-1, the plural elasticity dowel 3-2 and plug 3-3 of the annular be connected with described cylindrical body 8 inwall, and described plug 3-3 is connected with described pedestal 3-1 by described plural elasticity dowel 3-2.Described cylindrical body 8 inwall is provided with groove, and the pedestal 3-1 of described reverse flow prevention section 3 is embedded in described groove.
As illustrated in figs. 5-7, the quantity of described elasticity dowel 3-2 preferably 2 ~ 4, elasticity dowel 3-2 is uniformly distributed at plug 3-3 week circle.Form engraved structure between elasticity dowel 3-2 and described pedestal 3-1, blood is passed through.
Described venipuncture needle 1 is arranged on needle handle 2, described needle handle 2 to be arranged in described cylindrical body 8 or one-body molded with described cylindrical body 8, the end of described venipuncture needle 1 is provided with the extension 7 of column, described extension 7 is resisted against on described plug 3-3, extension 7 couples of plug 3-3 produce the active force pressed down, elasticity dowel 3-2 produces deformation slightly, plug 3-3 forms plugging action to the port of described extension 7, described needle stand 4 is provided with plug puncture needle 5, and described plug puncture needle 5 communicates with the internal flow path of described cylindrical body 8.The upper end of described extension 7 is fixedly connected with described needle handle 2 top or one-body molded, and venipuncture needle 1 wears the extension 7 penetrated described.
In the present embodiment, described cylindrical body 8 and needle stand 4 one-body molded, described needle handle 2 is bell jar shape, and its inside top is provided with the extension 7 to downward-extension, and venipuncture needle 1 is arranged in extension 7, extension 7 lower end oral area and described plug 3-3 suitable.Needle handle 2 is connected in described cylindrical body 8.Described reverse flow prevention section 3 is arranged at the upper port place of described cylindrical body 8, and when needle handle 2 is fastened in cylindrical body 8, extension 7 couples of plug 3-3 produce suppressing action, make elasticity dowel 3-2 be in the state tightened.
Described plug 3-3 top is tapered, taper type, spherical or cylindrical, as shown in Figure 1, plug 3-3 top is tapered, and its plugging effect in mechanism is good, resets accurately, stability and counterflow-preventing better effects if; As shown in Figure 2, plug 3-3 entirety is spheroidal; As shown in Figure 3, plug 3-3 entirety is cylindrical.The transverse section of described elasticity dowel 3-2 is rounded, square, rhombus, ellipse or triangle.
As shown in Figure 4, for the blood taking needle of another kind of embodiment, foregoing backflow preventing structure, be fixed on the venipuncture needle 1 on described cylindrical body 8 top and the connector 10 of described cylindrical body 8 bottom is set, described cylindrical body 8 and connector 10 one-body molded, the end of described venipuncture needle 1 is provided with the extension 7 of column, described extension 7 is resisted against on described plug 3-3, described connector 10 is connected with plug puncture needle 5 by flexible pipe 11, and described flexible pipe 19 communicates with the internal flow path of described cylindrical body 8.
Described venipuncture needle 1 is arranged on needle handle 2, and described needle handle 2 to be arranged in described cylindrical body 8 or one-body molded with described cylindrical body 8, and in the present embodiment, described needle handle 2 is connected in described cylindrical body 8.
The end of described flexible pipe 19 is provided with coupling 12, and described plug puncture needle 5 is arranged on needle stand 4, and needle stand 4 is connected with coupling 12.Airtight resistance blood glue cover 6 is equipped with outside plug puncture needle 5.
Last it is noted that above embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail this utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in previous embodiment, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of this utility model embodiment technical scheme.
Claims (10)
1. a blood sampling instrument backflow preventing structure, it is characterized in that: it comprises one has the cylindrical body (8) of internal flow path and is arranged at the reverse flow prevention section (3) of described cylindrical body (8) internal flow path, described reverse flow prevention section (3) comprises the pedestal (3-1) of the annular be connected with described cylindrical body (8) inwall, plural elasticity dowel (3-2) and plug (3-3), and described plug (3-3) is connected with described pedestal (3-1) by described plural elasticity dowel (3-2).
2. a kind of blood sampling instrument backflow preventing structure according to claim 1, is characterized in that: described elasticity dowel (3-2) is 2 ~ 4, and elasticity dowel (3-2) is uniformly distributed at plug (3-3) Zhou Yuan.
3. a kind of blood sampling instrument backflow preventing structure according to claim 1 and 2, is characterized in that: described plug (3-3) top is tapered, taper type, spherical or cylindrical.
4. a kind of blood sampling instrument backflow preventing structure according to claim 3, it is characterized in that: described cylindrical body (8) inwall is provided with groove, the pedestal (3-1) of described reverse flow prevention section (3) is embedded in described groove.
5. a blood taking needle, it is characterized in that: it comprises blood sampling instrument backflow preventing structure as described in any one of claim 1-4, be fixed on as described in cylindrical body (8) top venipuncture needle (1) and be fixed on the needle stand (4) of cylindrical body (8) bottom, the end of described venipuncture needle (1) is provided with the extension (7) of column, described extension (7) is resisted against on described plug (3-3), described needle stand (4) is provided with plug puncture needle (5), described plug puncture needle (5) communicates with the internal flow path of described cylindrical body (8).
6. a kind of blood taking needle according to claim 5, is characterized in that: described venipuncture needle (1) is arranged on needle handle (2), and it is upper or one-body molded with described cylindrical body (8) that described needle handle (2) is arranged at described cylindrical body (8).
7. a kind of blood taking needle according to claim 6, is characterized in that: the upper end of described extension (7) is fixedly connected with described needle handle (2) top or one-body molded.
8. a blood taking needle, it is characterized in that: it comprises the blood sampling instrument backflow preventing structure as described in any one of claim 1-4, be fixed on the venipuncture needle (1) on described cylindrical body (8) top and the connector (10) of described cylindrical body (8) bottom is set, the end of described venipuncture needle (1) is provided with the extension (7) of tubular, described extension (7) is resisted against on described plug (3-3), described connector (10) is connected with plug puncture needle (5) by flexible pipe (11), described flexible pipe (19) communicates with the internal flow path of described cylindrical body (8).
9. a kind of blood taking needle according to claim 8, is characterized in that: described venipuncture needle (1) is arranged on needle handle (2), and it is upper or one-body molded with described cylindrical body (8) that described needle handle (2) is arranged at described cylindrical body (8).
10. a kind of blood taking needle according to claim 9, is characterized in that: the end of described flexible pipe (19) is provided with coupling (12), and described plug puncture needle (5) is connected with coupling (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520346680.2U CN204708864U (en) | 2015-05-27 | 2015-05-27 | A kind of instrument backflow preventing structure and comprise its blood taking needle of taking a blood sample |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520346680.2U CN204708864U (en) | 2015-05-27 | 2015-05-27 | A kind of instrument backflow preventing structure and comprise its blood taking needle of taking a blood sample |
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| CN204708864U true CN204708864U (en) | 2015-10-21 |
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| CN201520346680.2U Active CN204708864U (en) | 2015-05-27 | 2015-05-27 | A kind of instrument backflow preventing structure and comprise its blood taking needle of taking a blood sample |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105726043A (en) * | 2016-04-13 | 2016-07-06 | 浏阳市三力医用科技发展有限公司 | Anti-reflux structure of blood sampling needle |
-
2015
- 2015-05-27 CN CN201520346680.2U patent/CN204708864U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105726043A (en) * | 2016-04-13 | 2016-07-06 | 浏阳市三力医用科技发展有限公司 | Anti-reflux structure of blood sampling needle |
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