CN101566549B - Sampling/measuring needle of blood viscosity measurement device - Google Patents
Sampling/measuring needle of blood viscosity measurement device Download PDFInfo
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- CN101566549B CN101566549B CN2009101039667A CN200910103966A CN101566549B CN 101566549 B CN101566549 B CN 101566549B CN 2009101039667 A CN2009101039667 A CN 2009101039667A CN 200910103966 A CN200910103966 A CN 200910103966A CN 101566549 B CN101566549 B CN 101566549B
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- outer tube
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- tube
- blood viscosity
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Abstract
The invention discloses a sampling/measuring needle of blood viscosity measurement device, comprising a metal inner tube for sampling/measuring, a metal outer tube sleeved outside the inner tube, a cone shaped tube head on the lower end of the inner tube which projects out from the lower end of the outer tube, an air-tightness ventilation interlayer between the inner tube and the outer tube, the two ends of the air-tightness ventilation interlayer being sealed respectively by the insulation covers for preventing the contact of the inner tube and the outer tube, an upper, lower ventilation holes respectively on the tube wall of the outer tube which are communicated with the air-tightness ventilation interlayer, two independent electrodes formed by respectively welding the electrode leads onthe inner, outer tubes, wherein the upper ends of the inner, outer tubes are fixed on the bearing seat and the inner tube penetrates through the bearing seat. The needle uses the inner, outer metal t ube structures with air-tightness ventilation interlayer and the different electrodes are on the inner, outer tubes, therefore the sampling/measuring needle has sample suction and measurement function, simplifies the structure of the blood viscosity measurement device and realizes the quantitative sampling, with greatly increased measurement accuracy and repeatability.
Description
Technical field:
The present invention relates to measure the blood viscosity field, particularly a kind of sampling/surveyingpin of blood viscosity measurement mechanism.
Background technology:
Blood viscosity is the most important index that characterizes rheological characteristics of blood and the Changing Pattern under physiology and pathological conditions thereof on the clinical medicine, and it is significant because of the disease that blood viscosity causes unusually to diagnosis and control to detect blood viscosity.At present, the method of measuring blood viscosity mainly is to adopt capillary tube technique and cone-plate method, the suction needle of the measurement blood viscosity device of tradition capillary tube technique is the single tube suction needle, when measuring blood viscosity, the single tube suction needle inserts in the blood preparation test tube, under the driving of electrodynamic pump, the blood sample in the blood preparation test tube is drawn in the lower sphere of the device of measuring blood viscosity by negative pressure, after to be heated, be pressurized to upper sphere again, when the upper sphere internal pressure reaches threshold value, make between lower sphere that to form positive pressure poor, blood preparation flows back to lower sphere from upper sphere through the kapillary measuring body, pressure transducer writes down pressure history simultaneously, thereby obtains blood viscosity value.Sample after the measurement is discharged from the single tube suction needle, under the driving of electrodynamic pump, the cleaning fluid in the washer bottle is sucked in upper and lower spheroid and the kapillary measuring body again, at last from upper sphere, kapillary measuring body, the waste liquid of lower sphere after the single tube suction needle is discharged cleaning.Because the suction needle of traditional measurement blood viscosity device is the single tube suction needle, this single tube suction needle inserts in the blood sample sample test tube and passes through the negative pressure extracting blood sample to lower sphere, can't realize accurate quantitative sampling, be difficult to further improve accuracy and the repeatability of measuring, and adopt the single tube suction needle to take a sample, measure in addition and carry out, cause blood preparation and cleaning fluid operating path in measurement mechanism long, cause the secondary pollution of cleaning fluid easily sample in the kapillary measuring body.
Summary of the invention
The objective of the invention is deficiency at the prior art existence, a kind of sampling/surveyingpin of blood viscosity measurement mechanism is provided, it adopts the inside and outside metal tube structure that is provided with impermeability ventilation interlayer, inner and outer pipe is respectively different electrodes, make sampling/surveyingpin possess the sample of suction and measurement function simultaneously, simplified the structure of blood viscosity measurement mechanism, and can realize quantitative sampling, made the accuracy of measurement and repeatability all obtain improving greatly.
The object of the present invention is achieved like this: sampling/surveyingpin has the metal inner pipe of taking a sample/measuring of being used to that the aperture is 0.5mm～0.8mm, with the metal outer pipe that is enclosed within outside the interior pipe, outer tube is shorter than interior pipe, the pipe lower end has tapered tube head in described, this tapered tube head is given prominence to the lower end at outer tube, the cone bottom diameter of tapered tube head is identical with outer external diameter of pipe, be provided with impermeability ventilation interlayer in described between pipe and the outer tube, the two ends of this impermeability ventilation interlayer are respectively with in cutting off, the insulation sleeve sealing of outer tube contact, the interior pipe on the pipeline section corresponding with outer tube is coated with insulation course, be respectively equipped with on the tube wall of described outer tube, following air hole communicates with impermeability ventilation interlayer, in, difference welding electrode lead-in wire forms two independently electrodes on the outer tube, in, supporting base is fixed in the upper end of outer tube, and interior pipe runs through supporting base.
The length of pipe is 180mm～220mm in described.
The gap width of described impermeability ventilation interlayer is 0.25mm～0.5mm.
The diameter of the upper and lower air hole on the tube wall of described outer tube is 0.5mm～1mm, and following air hole is 15～30mm apart from the distance of tapered tube head.
Described supporting base comprises interior piping support seat, outer tube supports seat, piping support seat in the upper end that is used to the metal inner pipe of taking a sample/measuring is fixed in, interior piping support seat radially is provided with electrode lead hole, and the outer tube supports seat is fixed in the upper end of metal outer pipe, and the outer tube supports seat is positioned at piping support seat below.
Described outer tube supports seat radially be provided with upper vent hole on the corresponding outer tube wall of ventilation mouth.
Described tapered tube head has the needle point that is used for cut, and the needle point that is used for cut has the diameter identical with interior pipe, forms needle point by a bevel tangent plane, and the interior pipe lower end mouth of pipe is positioned at this bevel tangent plane.
Covered dielectric layer is parcel insulating sleeve on inner pipe on the pipeline section that pipe is corresponding with outer tube in described.
Owing to adopted such scheme, sampling/surveyingpin to adopt inside and outside metal tube structure, the aperture that is used to the metal inner pipe of taking a sample/measuring is 0.5mm～0.8mm, and the formation capillary pipe structure makes it have the capillary function of measurement blood viscosity; The outer metal outer pipe of pipe is shorter than interior pipe in being enclosed within, and the pipe lower end has tapered tube head and gives prominence to lower end at outer tube in making, and can contact the extraction blood sample with blood sample in the vacuum blood collection test tube.Be provided with impermeability ventilation interlayer in described between pipe and the outer tube, the two ends of this impermeability ventilation interlayer are respectively with in cutting off, the insulation sleeve sealing of outer tube contact, the interior pipe on the pipeline section corresponding with outer tube is coated with insulation course, be respectively equipped with on the tube wall of described outer tube, following air hole communicates with impermeability ventilation interlayer, make impermeability ventilation interlayer form gas distribution channel, when sampling/surveyingpin inserts in the vacuum blood collection test tube with after blood sample contacts, upper vent hole input pressure gas from the outer tube wall, pressed gas is carried air pressure from lower through-hole through gas distribution channel to the vacuum blood collection test tube, make the blood sample in the vacuum blood collection test tube be pressed into the upper sphere that sampling/the surveyingpin upper end is provided with from the metal inner pipe that is used for taking a sample/measure, finish blood sample and extract by air pressure; The upper vent hole sky is communicated with atmosphere, the blood sample sample that is forced into upper sphere is under the double action of draught head and gravity, metal inner pipe through capillary pipe structure flows back to the vacuum blood collection test tube, by the pressure measure of the change of blood sample sample from the metal inner pipe reflux course, calculate the viscosity number of blood.Because difference welding electrode lead-in wire forms two independently electrodes on the inner and outer pipe, after the liquid level of blood sample in the vacuum blood collection test tube is immersed in the lower end of the inner and outer pipe of sampling/surveyingpin, the liquid level sensor that is electrically connected with contact conductor can accurately detect current liquid level position, thereby the advance distance of control sampling/surveyingpin, stretch into level by sampling/surveyingpin and determine sampling amount, realize accurate quantitative sampling thus, improve the accuracy and the repeatability of quantitative sampling.
Sampling/the surveyingpin of blood viscosity measurement mechanism of the present invention integrates sampling, measurement function, can simplify the structure of blood viscosity measurement mechanism, shorten the path that blood viscosity is measured, and the cleaning of sampling/surveyingpin also is more prone to and thoroughly, in the time of can avoiding measuring to the secondary pollution of blood sample.
The invention will be further described below in conjunction with drawings and Examples.
Description of drawings
Accompanying drawing is a structural representation of the present invention.
In the accompanying drawing, 1 is interior piping support seat, and 2 is sealing gasket, 3 is interior pipe, and 4 are impermeability ventilation interlayer, and 4a is a upper vent hole, 4b is following air hole, and 5 is outer tube, and 6 are the ventilation mouth, 7 is tapered tube head, and 7a is a needle point, and 8 is insulation sleeve, 8a is the step insulation sleeve, and 9 is insulation course, and 10 is the outer tube supports seat, 11a, 11b are contact conductor, and 12 is electrode lead hole.
Embodiment
Referring to accompanying drawing, sampling/the surveyingpin of this blood viscosity measurement mechanism has the metal inner pipe 3 of taking a sample/measuring of being used to that the aperture is 0.5mm～0.8mm, with the metal outer pipe 5 that is enclosed within outside the interior pipe, it is good that metal inner pipe 3 and outer tube 5 all adopt stainless-steel tube, the length of pipe 3 is 180mm～220mm in described, and outer tube 5 is than interior pipe 3 weak points.Pipe 3 lower ends have tapered tube head 7 in described, described tapered tube head 7 has the needle point 7a that is used for cut, the needle point 7a that is used for cut has the diameter identical with interior pipe 3, form needle point by a bevel tangent plane, the interior pipe 3 lower end mouths of pipe are positioned at this bevel tangent plane, even also can not seal the mouth of pipe at the bottom of 3 times end in contact vacuum blood collections of interior pipe test tube.This bevel tangent plane and tube's axis are 20～40 ° inclined-plane, and the bevel tangent plane and the tube's axis of present embodiment is 30 ° and seamlessly transit with the conical surface of tapered tube head and to link to each other.This tapered tube head 7 is given prominence in the lower end of outer tube 5, and the cone bottom diameter of tapered tube head 7 is identical with outer tube 5 external diameters, and the external diameter of outer tube 5 is 2.4mm～2.8mm.Be provided with impermeability ventilation interlayer 4 in described between pipe 3 and the outer tube 5, pressed gas can be passed through from this impermeability ventilation interlayer 4.On this impermeability ventilation interlayer 4, following two ends are respectively with in cutting off, insulation sleeve 8 sealings of outer tube contact, insulation sleeve 8 adopts bonding being a tight fit between interior pipe and the outer tube, insulation sleeve can adopt plastic jacket or rubber sleeve, wherein the insulation sleeve of impermeability ventilation interlayer 4 lower ends is step insulation sleeve 8a, manage on 3 in step insulation sleeve 8a is enclosed within, the path slug of step insulation sleeve 8a goes into to form in the outer tube 5 the radially contact between sealing and the partition inner and outer pipes, the big footpath section of step insulation sleeve 8a is positioned between pipe tapered tube head 7 and the outer tube 5, cut off outer tube 5 axially with interior pipe tapered tube head 7 between contact, the sealing of insulation between the realization inner and outer pipes and impermeability ventilation interlayer, the diameter of big footpath section is identical with the diameter of outer tube, and the pipe tapered tube head is to seamlessly transitting between the outer tube in guaranteeing.In be coated with insulation course 9 on pipe 3 pipeline sections corresponding with outer tube, this insulation course 9 also can be with insulator-coating on inner pipe for wrapping up insulating sleeve on inner pipe.Be respectively equipped with on the tube wall of described outer tube 5, following air hole 4a, 4b communicates with impermeability ventilation interlayer 4, the gap width of impermeability ventilation interlayer 4 is 0.25mm～0.5mm, on on the tube wall of outer tube, following air hole 4a, the diameter of 4b is 0.5mm～1mm, last through hole 4a is on the outer tube about ora terminalis 10～30mm, following air hole 4b is about 15～30mm apart from the distance of tapered tube head 7, the needle tubing part of air hole 4b below can be extend in the blood preparation and down air hole 4b be positioned at blood liquid level top, the pressed gas that enters from upper vent hole 4a enters the vacuum blood collection test tube from following air hole 4b through impermeability ventilation interlayer 4, above the blood liquid level, exert pressure, by air pressure blood sample is pressed in the upper sphere from metal inner pipe 3 and takes a sample.Welding electrode lead-in wire 11a, 11b form two independently electrodes respectively on the described metal inner and outer pipe, contact conductor 11a, the 11b of inner and outer pipe is used to be electrically connected the liquid level detector of blood viscosity measurement mechanism, the metal inner and outer pipe of liquid level detector collection sampling/surveyingpin inserts the information of blood level in the vacuum blood collection test tube, by calculating sampling amount, realize accurate quantitative sampling thus.Supporting base is fixed in the upper end of inner and outer pipe 3,5, and interior pipe 3 runs through supporting base.Described supporting base comprises interior piping support seat 1, outer tube supports seat 10; The upper end that is used to the metal inner pipe 3 of taking a sample/measuring tightly cooperate be fixed in piping support seat in the through hole of piping support seat 1 and in running through, can adopt bonding or welding fixing, blood sample can be entered in the upper sphere that connects on the supporting base, interior piping support seat 1 radially is provided with electrode lead hole 12, and the contact conductor 11a that welds with interior pipe 3 can be drawn from electrode lead hole 12; The upper end of metal outer pipe 5 tightly cooperates in the through hole that is fixed in outer tube supports seat 10, can adopt bonding or welding fixing, outer tube supports seat 10 is positioned at piping support seat 1 below, is provided with sealing gasket 2 between two supporting bases, with the impermeability between the assurance inner and outer pipe.Metal outer pipe 5 also can be provided with electrode lead hole at the outer tube supports seat near the outer tube supports seat 10 welding electrode lead-in wire 11b of place, and contact conductor can be welded on the outer tube of outer tube supports seat cover part.Described outer tube supports seat radially be provided with upper vent hole 4a on the ventilation mouth 6 corresponding outer tube walls, on the ventilation mouth 6 three-way change-over valve can be installed, be communicated with air pump respectively or communicate by three-way change-over valve with atmosphere.
Claims (8)
1. sampling/the surveyingpin of a blood viscosity measurement mechanism, it is characterized in that: sampling/surveyingpin has the metal inner pipe of taking a sample/measuring of being used to that the aperture is 0.5mm～0.8mm, with the metal outer pipe that is enclosed within outside the interior pipe, outer tube is shorter than interior pipe, the pipe lower end has tapered tube head in described, this tapered tube head is given prominence to the lower end at outer tube, the cone bottom diameter of tapered tube head is identical with outer external diameter of pipe, be provided with impermeability ventilation interlayer in described between pipe and the outer tube, the two ends of this impermeability ventilation interlayer are respectively with in cutting off, the insulation sleeve sealing of outer tube contact, the interior pipe on the pipeline section corresponding with outer tube is coated with insulation course, be respectively equipped with on the tube wall of described outer tube, following air hole communicates with impermeability ventilation interlayer, in, difference welding electrode lead-in wire forms two independently electrodes on the outer tube, in, supporting base is fixed in the upper end of outer tube, and interior pipe runs through supporting base.
2. sampling/the surveyingpin of blood viscosity measurement mechanism according to claim 1 is characterized in that: the length of pipe is 180mm～220mm in described.
3. sampling/the surveyingpin of blood viscosity measurement mechanism according to claim 1 is characterized in that: the gap width of described impermeability ventilation interlayer is 0.25mm～0.5mm.
4. sampling/the surveyingpin of blood viscosity measurement mechanism according to claim 1 is characterized in that: the diameter of the upper and lower air hole on the tube wall of described outer tube is 0.5mm～1mm, and following air hole is 15～30mm apart from the distance of tapered tube head.
5. sampling/the surveyingpin of blood viscosity measurement mechanism according to claim 1, it is characterized in that: described supporting base comprises interior piping support seat, outer tube supports seat, piping support seat in the upper end that is used to the metal inner pipe of taking a sample/measuring is fixed in, interior piping support seat radially is provided with electrode lead hole, the outer tube supports seat is fixed in the upper end of metal outer pipe, and the outer tube supports seat is positioned at piping support seat below.
6. sampling/the surveyingpin of blood viscosity measurement mechanism according to claim 5 is characterized in that: described outer tube supports seat radially be provided with upper vent hole on the corresponding outer tube wall of ventilation mouth.
7. sampling/the surveyingpin of blood viscosity measurement mechanism according to claim 1, it is characterized in that: described tapered tube head has the needle point that is used for cut, the needle point that is used for cut has the diameter identical with interior pipe, forms needle point by a bevel tangent plane, and the interior pipe lower end mouth of pipe is positioned at this bevel tangent plane.
8. sampling/the surveyingpin of blood viscosity measurement mechanism according to claim 1 is characterized in that: covered dielectric layer is parcel insulating sleeve on inner pipe on the pipeline section that pipe is corresponding with outer tube in described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101039667A CN101566549B (en) | 2009-05-27 | 2009-05-27 | Sampling/measuring needle of blood viscosity measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101039667A CN101566549B (en) | 2009-05-27 | 2009-05-27 | Sampling/measuring needle of blood viscosity measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101566549A CN101566549A (en) | 2009-10-28 |
| CN101566549B true CN101566549B (en) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101039667A Expired - Fee Related CN101566549B (en) | 2009-05-27 | 2009-05-27 | Sampling/measuring needle of blood viscosity measurement device |
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| CN (1) | CN101566549B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346195B (en) * | 2010-07-30 | 2013-10-23 | 中国科学院金属研究所 | Liquid-sensitivity type sampling needle |
| CN102706524B (en) * | 2012-05-15 | 2013-08-14 | 苏州凯尔博精密机械有限公司 | Air tightness detecting device for medical needle head |
| CN102805627A (en) * | 2012-07-29 | 2012-12-05 | 宁波市鄞州青林医疗器械技术咨询有限公司 | Splash-proof double-channel sampling needle head of blood collection tube |
| CN112547462B (en) * | 2020-11-23 | 2022-12-09 | 重庆大学 | Preparation method of wear-resistant super-hydrophobic coating on surface of sampling needle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4517830A (en) * | 1982-12-20 | 1985-05-21 | Gunn Damon M | Blood viscosity instrument |
| US5222497A (en) * | 1991-01-25 | 1993-06-29 | Nissho Corporation | Hollow needle for use in measurement of viscosity of liquid |
| CN1168971A (en) * | 1996-03-14 | 1997-12-31 | 东亚医用电子株式会社 | Specimen suction tube and method for mfg. same |
| CN1708254A (en) * | 2002-10-28 | 2005-12-14 | 洛桑聚合联合学院 | Sensor system for determining the concentration of glucose in blood |
| CN201413287Y (en) * | 2009-05-27 | 2010-02-24 | 重庆天海医疗设备有限公司 | Needle for measuring blood viscosity |
-
2009
- 2009-05-27 CN CN2009101039667A patent/CN101566549B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4517830A (en) * | 1982-12-20 | 1985-05-21 | Gunn Damon M | Blood viscosity instrument |
| US5222497A (en) * | 1991-01-25 | 1993-06-29 | Nissho Corporation | Hollow needle for use in measurement of viscosity of liquid |
| CN1168971A (en) * | 1996-03-14 | 1997-12-31 | 东亚医用电子株式会社 | Specimen suction tube and method for mfg. same |
| CN1708254A (en) * | 2002-10-28 | 2005-12-14 | 洛桑聚合联合学院 | Sensor system for determining the concentration of glucose in blood |
| CN201413287Y (en) * | 2009-05-27 | 2010-02-24 | 重庆天海医疗设备有限公司 | Needle for measuring blood viscosity |
Non-Patent Citations (1)
| Title |
|---|
| 吕霞付等.一种超声波血液密度计的研制.《生物医学工程学杂志》.2001,第18卷(第1期),30-32. * |
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