CN204562186U - A kind of instrument backflow preventing structure and comprise the blood taking needle of this structure of taking a blood sample - Google Patents
A kind of instrument backflow preventing structure and comprise the blood taking needle of this structure of taking a blood sample Download PDFInfo
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- CN204562186U CN204562186U CN201520030191.6U CN201520030191U CN204562186U CN 204562186 U CN204562186 U CN 204562186U CN 201520030191 U CN201520030191 U CN 201520030191U CN 204562186 U CN204562186 U CN 204562186U
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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 the blood taking needle of this structure 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 fixed on the counterflow-preventing gum cover of the bottomless straight-tube shape that can its inwall be caused to be attached together when wall speckles with residual liquid of described cylindrical body internal flow path one end within it.Blood sampling instrument backflow preventing structure provided by the utility model and comprise the blood taking needle of this structure, simplify the structure of counterflow-preventing gum cover of the prior art, the production cost of counterflow-preventing gum cover and even whole blood taking needle is reduced greatly, and this counterflow-preventing gum cover have better counterflow-preventing effect.
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 the blood taking needle of this structure 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 the blood sampling instrument backflow preventing structure providing a kind of structure simple, with low cost on the one hand, 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.
This utility model adopts following technical scheme:
A kind of blood sampling instrument backflow preventing structure, it comprises one has the cylindrical body of internal flow path and is fixed on the reverse flow prevention section of described cylindrical body internal flow path one end, and described reverse flow prevention section is the counterflow-preventing gum cover of the bottomless straight-tube shape that can its inwall be caused to be attached together when wall speckles with residual liquid within it.
As further improvement of the utility model, described counterflow-preventing gum cover adopts has elastic silica gel hose.
As further improvement of the utility model, the internal diameter of described counterflow-preventing gum cover is 1.5-2.5mm, wall thickness 0.06-0.1mm.
As further improvement of the utility model, the length of described counterflow-preventing gum cover is 6-10mm.
As further improvement of the utility model, the described counterflow-preventing gum cover other end is unsettled.
As further improvement of the utility model, described cylindrical body internal flow path one end is installed with the adapter sleeve be communicated with described internal flow path, and described counterflow-preventing gum cover is fixedly connected with described adapter sleeve.
A kind of blood taking needle, it venipuncture needle comprising blood sampling instrument backflow preventing structure as above and be fixed on described cylindrical body one end, the stiff end of described venipuncture needle and described counterflow-preventing gum cover is positioned at the same end of described cylindrical body, and described venipuncture needle communicates with the internal flow path of described counterflow-preventing gum cover.
As further improvement of the utility model, described venipuncture needle is fixed in described cylindrical body by needle handle.
As further improvement of the utility model, the other end of described cylindrical body is installed with plug puncture needle, and described plug puncture needle communicates with the internal flow path of described cylindrical body.
As further improvement of the utility model, described plug puncture needle is fixed in described cylindrical body by needle stand.
Good effect of the present utility model is as follows:
Blood sampling instrument backflow preventing structure provided by the utility model and comprise the blood taking needle of this structure, simplify the structure of counterflow-preventing gum cover of the prior art, the production cost of counterflow-preventing gum cover and even whole blood taking needle is reduced greatly, and this counterflow-preventing gum cover have better counterflow-preventing effect.
This utility model is by improving described counterflow-preventing gum cover, make counterflow-preventing gum cover when inwall speckle with remained blood drip, drop is converged by intermolecular force absorption, forming negative pressure with air exclusion causes counterflow-preventing gum cover to be crushed, when blood enters from the stiff end of counterflow-preventing gum cover, the counterflow-preventing gum cover of flattening can be washed open by fluid flowing, make blood proper flow, when blood enters from the free end of counterflow-preventing gum cover, counterflow-preventing gum cover can not be washed open by blood, and the free end of the counterflow-preventing gum cover of collapsed state can be made to bend, play counterflow-preventing effect.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of this utility model blood taking needle.
Accompanying drawing 2 is this utility model counterflow-preventing gum cover adsorbed state structural representation.
In the accompanying drawings: 01 venipuncture needle, 02 needle handle, 03 counterflow-preventing gum cover, 04 cavity, 05 needle stand, 06 plug puncture needle, 07 adapter sleeve, 08 cylindrical body.
Detailed description of the invention
Below in conjunction with attached Fig. 1 and 2 and detailed description of the invention, this utility model is described in further detail.
A kind of blood taking needle as shown in figure 1 and 2, it venipuncture needle 01 and plug puncture needle 06 of comprising blood sampling instrument backflow preventing structure and being fixedly installed on described backflow preventing structure two ends.
Described backflow preventing structure comprises one to be had the cylindrical body 08 of internal flow path and is fixed on the reverse flow prevention section of described cylindrical body 08 internal flow path one end, described reverse flow prevention section is the counterflow-preventing gum cover 03 of the bottomless straight-tube shape that can its inwall be caused to be attached together when wall speckles with residual liquid within it, and described counterflow-preventing gum cover 03 other end is unsettled.
Described cylindrical body 08 internal flow path one end is installed with the adapter sleeve 07 be communicated with described internal flow path, and described counterflow-preventing gum cover 03 is fixedly connected with described adapter sleeve 07.
Preferably, described counterflow-preventing gum cover 03 adopts has elastic silica gel hose or rubber hose, and usually, the internal diameter of described counterflow-preventing gum cover 03 is 1.5-2.5mm, wall thickness 0.06-0.1mm, and length is 6-10mm.
In the present embodiment, the internal diameter of described counterflow-preventing gum cover 03 is 2mm, wall thickness 0.08mm, and length is 8mm.
Described venipuncture needle 01 is fixed in described cylindrical body 08 by needle handle 02, the stiff end of described venipuncture needle 01 and described counterflow-preventing gum cover 03 is positioned at the same end of described cylindrical body 08, and described venipuncture needle 01 communicates with the internal flow path of described counterflow-preventing gum cover 03.Described needle handle 02 is in circular cone shape, and its side walls collapse, is suitable for hand-held.
Described plug puncture needle 06 is fixed in described cylindrical body 08 by needle stand 05, and described plug puncture needle 06 communicates with the internal flow path of described cylindrical body 08.Described needle stand 05 is provided with external screw thread.
Cylindrical body 08, needle handle 02 and needle stand 05 are formed and are suitable for hand-held penholder shape, facilitate hand-held.
See accompanying drawing 1,2, the two ends of described cylindrical body 08 are by needle handle 02 and needle stand 05 shutoff, and its inside forms cavity 04, i.e. internal flow path of described cylindrical body 08.
See accompanying drawing 2, this utility model is by improving described counterflow-preventing gum cover 03, in use, counterflow-preventing gum cover 03 when inwall speckle with remained blood drip, drop is converged by intermolecular force absorption, forming negative pressure with air exclusion causes counterflow-preventing gum cover 03 to be crushed, when blood collection procedure blood is entered from the stiff end of counterflow-preventing gum cover 03 by vein blood taking needle 01, the pressure of blood vessel causes blood the counterflow-preventing gum cover 03 of flattening can be washed open, make blood proper flow, when blood enters into described cavity 04 from plug puncture needle 06, counterflow-preventing gum cover 03 can not be washed open by blood, and the free end of the counterflow-preventing gum cover 03 of collapsed state can be made to bend, play counterflow-preventing effect.
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 (08) of internal flow path and is fixed on the reverse flow prevention section of described cylindrical body (08) internal flow path one end, described reverse flow prevention section is the counterflow-preventing gum cover (03) of the bottomless straight-tube shape that can its inwall be caused to be attached together when wall speckles with residual liquid within it.
2. a kind of blood sampling instrument backflow preventing structure according to claim 1, is characterized in that: described counterflow-preventing gum cover (03) adopts has elastic silica gel hose.
3. a kind of blood sampling instrument backflow preventing structure according to claim 1 and 2, is characterized in that: the internal diameter of described counterflow-preventing gum cover (03) is 1.5-2.5mm, wall thickness 0.06-0.1mm.
4. a kind of blood sampling instrument backflow preventing structure according to claim 3, is characterized in that: the length of described counterflow-preventing gum cover (03) is 6-10mm.
5. a kind of blood sampling instrument backflow preventing structure according to claim 1 and 2, is characterized in that: described counterflow-preventing gum cover (03) other end is unsettled.
6. a kind of blood sampling instrument backflow preventing structure according to claim 1, it is characterized in that: described cylindrical body (08) internal flow path one end is installed with the adapter sleeve (07) be communicated with described internal flow path, described counterflow-preventing gum cover (03) is fixedly connected with described adapter sleeve (07).
7. 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 1-6 and the venipuncture needle (01) of cylindrical body (08) one end as described in being fixed on, the stiff end of described venipuncture needle (01) and described counterflow-preventing gum cover (03) is positioned at the same end of described cylindrical body (08), and described venipuncture needle (01) communicates with the internal flow path of described counterflow-preventing gum cover (03).
8. a kind of blood taking needle according to claim 7, is characterized in that: described venipuncture needle (01) is fixed in described cylindrical body (08) by needle handle (02).
9. a kind of blood taking needle according to claim 7 or 8, is characterized in that: the other end of described cylindrical body (08) is installed with plug puncture needle (06), and described plug puncture needle (06) communicates with the internal flow path of described cylindrical body (08).
10. a kind of blood taking needle according to claim 9, is characterized in that: described plug puncture needle (06) is fixed in described cylindrical body (08) by needle stand (05).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520030191.6U CN204562186U (en) | 2015-01-16 | 2015-01-16 | 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520030191.6U CN204562186U (en) | 2015-01-16 | 2015-01-16 | 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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| CN204562186U true CN204562186U (en) | 2015-08-19 |
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| CN201520030191.6U Active CN204562186U (en) | 2015-01-16 | 2015-01-16 | 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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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106108919A (en) * | 2016-09-19 | 2016-11-16 | 陈剑婷 | Blood taking needle backflow preventing structure and counterflow-preventing blood taking needle |
| IT201800007396A1 (en) * | 2018-07-20 | 2020-01-20 | Francesco Schittini | SYSTEM OF A PERFECTED TYPE FOR THE COLLECTION OF BIOLOGICAL SAMPLES, PREFERABLY HEMATIC, FITTED WITH ANTI-REFLUX DEVICE. |
| CN111227847A (en) * | 2020-01-13 | 2020-06-05 | 西京学院 | Anti-reflux venous blood sampling device and anti-reflux method |
-
2015
- 2015-01-16 CN CN201520030191.6U patent/CN204562186U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106108919A (en) * | 2016-09-19 | 2016-11-16 | 陈剑婷 | Blood taking needle backflow preventing structure and counterflow-preventing blood taking needle |
| IT201800007396A1 (en) * | 2018-07-20 | 2020-01-20 | Francesco Schittini | SYSTEM OF A PERFECTED TYPE FOR THE COLLECTION OF BIOLOGICAL SAMPLES, PREFERABLY HEMATIC, FITTED WITH ANTI-REFLUX DEVICE. |
| CN111227847A (en) * | 2020-01-13 | 2020-06-05 | 西京学院 | Anti-reflux venous blood sampling device and anti-reflux method |
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