CN220175117U - Micro blood sampling straw - Google Patents
Micro blood sampling straw Download PDFInfo
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- CN220175117U CN220175117U CN202320995934.8U CN202320995934U CN220175117U CN 220175117 U CN220175117 U CN 220175117U CN 202320995934 U CN202320995934 U CN 202320995934U CN 220175117 U CN220175117 U CN 220175117U
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- inner diameter
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- blood
- suction tube
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- 238000010241 blood sampling Methods 0.000 title claims abstract description 36
- 239000010902 straw Substances 0.000 title claims description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000008280 blood Substances 0.000 abstract description 61
- 210000004369 blood Anatomy 0.000 abstract description 59
- 238000012864 cross contamination Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 8
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 206010011409 Cross infection Diseases 0.000 description 3
- 206010029803 Nosocomial infection Diseases 0.000 description 3
- 230000017531 blood circulation Effects 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 210000001124 body fluid Anatomy 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000005259 peripheral blood Anatomy 0.000 description 1
- 239000011886 peripheral blood Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Landscapes
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The utility model relates to the technical field of test tubes, and particularly discloses a micro blood sampling suction tube which comprises a capillary suction tube, a suction tube connector, a connecting tube and a dripper, wherein a blood sampling channel is arranged in the capillary suction tube, a connecting port is arranged at the connecting part of the suction tube connector and the connecting tube, a through hole is arranged in the connecting port, and the width of the through hole is the same as that of the blood sampling channel or the difference between the width of the through hole and the width of the blood sampling channel is not more than 0.2-1mm. The advantages are as follows: under the condition that the blood sucking speed of the capillary suction pipe is not influenced and the blood sucking function of the capillary suction pipe is not influenced, the outflow of blood from the suction pipe connector in the capillary suction pipe is reduced, the probability that the blood enters the connecting pipe and the drip part is reduced, and the result error and the possible biological potential safety hazard caused by blood cross contamination are reduced.
Description
Technical Field
The utility model relates to the technical field of test tubes, in particular to a micro blood sampling straw.
Background
Peripheral blood is a clinical common blood detection specimen, and is an indispensable link in acquiring laboratory data of patients and diagnosing diseases. The utility model provides a blood collection straw is the instrument commonly used of hospital collection blood, and current blood collection straw structure is as shown in fig. 1, including capillary straw 1, straw adapter 2, takeover 3 and water dropper 4, capillary straw and straw adapter are integral type, and takeover and water dropper are connected, and the one end cover of takeover is at the afterbody of straw adapter. The using method comprises the following steps: holding the micro blood sampling tube by hand, placing the end of the capillary tube into the blood to be measured, automatically sucking the blood into the capillary tube until the blood rises to the top of the capillary tube, automatically sucking the blood for no more than 2s, lightly touching the end of the capillary tube on the inner wall of Cheng Shouqi (test tube or blood sample cup, etc.), and squeezing the dripper by fingers to discharge the blood in the capillary tube into the container. Micropipettes sold in commercial whole cartridges are typically of a size of 10 μl to 150 μl, each cartridge comprising 200 to 400 capillaries per cartridge, and a single adapter and dropper for each cartridge, the capillaries being disposable and the adapters and droppers being reusable. In the existing clinical blood sampling process using a micro blood sampling suction tube, the condition that blood can pollute a connecting tube and a drip part is frequently encountered, the blood flows into the connecting tube and the drip part to be difficult to clean, and meanwhile, the cross contamination of the blood and the possible biological potential safety hazard are easily caused.
The prior patent literature discloses a plurality of similar micro blood collection straws, for example, a micro blood collection tube disclosed in patent application number 2019105730075, 2019 and 6, which comprises a tube body, wherein an inner tube is sleeved in the tube body, and the space between the inner tube and the inner side wall of the tube body is equally divided into at least three accommodating cavities. Although the patent also relates to improvement of blood pollution, the technical proposal has complex structure and high manufacturing cost through the proposal of arranging the inner cylinder, the outer cylinder and the separated accommodating cavity. Patent 2015208386429, 2015, 10 month discloses a micro liquid sampling and sample adding device and a blood sampling kit thereof, comprising a quantitative sampling head and a quantitative dropper. Although the patent also relates to improvement of blood cross contamination, the technical proposal aims at pollution risks caused by adopting auxiliary equipment in the process of blood collection and pipetting, and does not aim at pollution of a blood inflow connecting tube and a dripper part in the process of blood collection. The capillary for collecting trace body fluid is disclosed in 202221461039X and 2022 month 6, the outer wall of the capillary body is provided with a separation groove, and an annular groove is formed in a position corresponding to the separation groove. Although the end of the blood sampling tube can be prevented from being polluted, the patent scheme is not improved aiming at the pollution of the blood inflow connecting tube and the dripper part in the blood sampling process.
Disclosure of Invention
The utility model aims to provide a micro blood collection straw which can reduce the outflow of blood from a straw connector in a capillary straw, reduce the probability of the blood entering a connecting pipe and a dripping part, and reduce the result error and possible biological potential safety hazard caused by blood cross contamination.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a micro blood sampling straw comprises a capillary straw, a straw joint, a connecting pipe and a dripper, wherein a blood sampling channel is arranged in the capillary straw, a connecting port is arranged at the connecting part of the straw joint and the connecting pipe, a through hole is arranged in the connecting port, and the width of the through hole is the same as the width of the blood sampling channel or the difference between the width of the through hole and the width of the blood sampling channel is not more than 0.2-1mm.
In the micropipette described above, preferably, the width of the through hole is the same as the width of the blood collection channel or the width of the through hole differs from the width of the blood collection channel by not more than 0.2mm.
In the above micropipette, preferably, the sizes of the capillary pipette and the through hole are as follows:
a. the inner diameter of the capillary suction tube is 0.68mm, and the inner diameter of the through hole is 0.48-0.88mm; or (b)
b. The inner diameter of the capillary suction tube is 0.88mm, and the inner diameter of the through hole is 0.68-1.08mm; or (b)
c. The inner diameter of the capillary suction tube is 0.95mm, and the inner diameter of the through hole is 0.75-1.15mm; or (b)
d. The inner diameter of the capillary suction tube is 1.16mm, and the inner diameter of the through hole is 0.96-1.36mm; or (b)
e. The inner diameter of the capillary suction tube is 1.25mm, and the inner diameter of the through hole is 1.05-1.45mm.
In the above micropipette, preferably, the sizes of the capillary pipette and the through hole are as follows:
a. the inner diameter of the capillary suction tube is 0.68mm, and the inner diameter of the through hole is 0.68mm; or (b)
b. The inner diameter of the capillary suction tube is 0.88mm, and the inner diameter of the through hole is 0.88mm; or (b)
c. The inner diameter of the capillary suction tube is 0.95mm, and the inner diameter of the through hole is 0.95mm; or (b)
d. The inner diameter of the capillary suction tube is 1.16mm, and the inner diameter of the through hole is 1.16mm; or (b)
e. The inner diameter of the capillary suction tube is 1.25mm, and the inner diameter of the through hole is 1.25mm.
In the micro blood collection pipette, preferably, the connector is internally provided with a containing cavity, the bottom surface of the containing cavity, which is close to the capillary pipette, is provided with a through hole, the width of the through hole is the same as the width of the blood collection channel or the width of the through hole is different from the width of the blood collection channel by not more than 0.2-1mm, and the diameter of the containing cavity is larger than or equal to the diameter of the through hole.
In the micropipette described above, preferably, the width of the through hole is the same as the width of the blood collection channel or the width of the through hole differs from the width of the blood collection channel by not more than 0.2mm.
The utility model has the advantages that: under the condition that the blood sucking speed of the capillary suction pipe is not influenced and the blood sucking function of the capillary suction pipe is not influenced, the outflow of blood from the suction pipe connector in the capillary suction pipe is reduced, the probability that the blood enters the connecting pipe and the drip part is reduced, and the result error and the possible biological potential safety hazard caused by blood cross contamination are reduced.
Drawings
FIG. 1 is a schematic diagram of a conventional clinical micropipette.
FIG. 2a is a schematic plan view of the capillary suction tube and suction attachment of FIG. 1.
Fig. 2b is a schematic perspective view of the capillary suction tube and suction attachment shown in fig. 2 a.
FIG. 2c is a schematic view showing the structure of the suction attachment A shown in FIG. 2a in an angle direction.
FIG. 3a is a schematic plan view of a modified capillary suction tube and suction attachment in accordance with the present utility model.
Fig. 3b is a schematic perspective view of the capillary suction tube and suction attachment shown in fig. 3 a.
FIG. 3c is a schematic view showing the structure of the suction attachment A shown in FIG. 3a in an angle direction.
FIG. 4a is a schematic plan view of a capillary suction tube and a suction attachment in accordance with another modification of the present utility model.
Fig. 4b is a schematic perspective view of the capillary suction tube and suction attachment shown in fig. 4 a.
Detailed Description
The utility model is further described below in conjunction with the detailed description. It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Further, it is understood that various changes and modifications of the present utility model may be made by those skilled in the art after reading the description of the present utility model, and such equivalents are intended to fall within the scope of the utility model as defined in the appended claims.
Reference numerals and components referred to in the drawings are as follows:
1. capillary suction tube 2, suction tube connector 3, connection tube
4. Dripper 5, connector 6, blood sampling channel
7. Outer surface 8 through hole 9 accommodating cavity
Examples
Referring to fig. 1 and 2, fig. 1 is a schematic view of a structure of a conventional clinical micropipette, fig. 2a is a schematic view of a planar structure of the capillary suction tube and the suction tube adapter shown in fig. 1, fig. 2b is a schematic view of a perspective structure of the capillary suction tube and the suction tube adapter shown in fig. 2a, and fig. 2c is a schematic view of an angle of the suction tube adapter a shown in fig. 2 a. The existing clinically used micro blood sampling suction tube comprises a capillary suction tube, a suction tube connector, a connecting tube and a drip head, wherein the capillary suction tube and the suction tube connector are fixedly connected into a whole, the capillary suction tube and the suction tube connector are disposable articles, and a new capillary suction tube and suction tube connector are needed to be taken for next blood sampling after each blood sampling. The connecting pipe and the dripper are detachable and reusable objects, the connecting pipe is of a strip-shaped tubular structure made of medical rubber materials, and an air bag in the dripper is connected with the capillary suction pipe through the connecting pipe. Referring to fig. 2a, 2b and 2c, a through blood sampling channel is provided in the capillary straw, the connection part of the straw connector and the adapter tube is a connection port, the connection port is in a ring shape, the outline of the outer surface of the connection port is matched with the inner surface of the adapter tube, and the adapter tube can be inserted into the outer surface of the connection port; the inside of connector is the through-hole, and through-hole and blood sampling passageway UNICOM. As shown in fig. 2a, the diameter of the through hole is much larger than that of the blood collection channel, so that collected blood is easily polluted to the adapter and the drip part during the blood collection process using the micropipette, the blood flows into the adapter and the drip part to be difficult to clean, and the cross infection is easily caused by the blood pollution. Taking the disposable micro blood collection straw (Su Taixie is 20160157) as an example, the product specification of the conventional Jiangsu Kangjianhua medical instrument Co., ltd.) is a 10 μl micro blood collection straw: the outer diameter of the capillary suction pipe is 1.35mm, the inner diameter of the capillary suction pipe is 0.68mm, the outer diameter of the connecting port is 5.0mm, and the inner diameter of the connecting port is 3.8mm. Micropipette of 20 μl gauge: the outer diameter of the capillary suction pipe is 1.4mm, the inner diameter of the capillary suction pipe is 0.88mm, the outer diameter of the connecting port is 5.0mm, and the inner diameter of the connecting port is 3.8mm. Micropipette of 30 μl gauge: the outer diameter of the capillary suction pipe is 1.45mm, the inner diameter of the capillary suction pipe is 0.95mm, the outer diameter of the connecting port is 5.0mm, and the inner diameter of the connecting port is 3.8mm. Micropipette of 40 μl gauge: the outer diameter of the capillary suction pipe is 1.5mm, the inner diameter of the capillary suction pipe is 1.16mm, the outer diameter of the connecting port is 5.0mm, and the inner diameter of the connecting port is 3.8mm. Micropipette of 60 μl gauge: the outer diameter of the capillary suction pipe is 1.62mm, the inner diameter of the capillary suction pipe is 1.16mm, the outer diameter of the connecting port is 5.0mm, and the inner diameter of the connecting port is 3.8mm. Micropipette of 100 μl gauge: the outer diameter of the capillary suction pipe is 1.8mm, the inner diameter of the capillary suction pipe is 1.25mm, the outer diameter of the connecting port is 5.0mm, and the inner diameter of the connecting port is 3.8mm.
Please refer to fig. 3a, 3b and 3c. Fig. 3a is a schematic plan view of a modified capillary suction tube and suction attachment according to the present utility model, fig. 3b is a schematic perspective view of the capillary suction tube and suction attachment shown in fig. 3a, and fig. 3c is a schematic view of the suction attachment shown in fig. 3a at an angle a. A micro blood sampling straw comprises a capillary straw and a straw connector, wherein a penetrating blood sampling channel is arranged in the capillary straw, the connecting part of the straw connector and a connecting pipe is a connecting port, the connecting port is in a circular ring shape, the outline of the outer surface of the connecting port is matched with the inner surface of the connecting pipe, and the connecting pipe can be inserted into the outer surface of the connecting port; the inside of connector is the through-hole, and through-hole and blood sampling passageway UNICOM. The diameter of the through hole is set to be the same as or equivalent to the diameter of the blood sampling channel. Compared with the prior suction pipe joint clinically using a larger aperture, the scheme of the utility model reduces the inner diameter of the suction pipe joint connecting port, so that the inner diameter of the connecting port is the same as or equivalent to the aperture of the capillary, and the outer contour is unchanged, and the design has the advantages that: on one hand, the outflow of blood in the capillary suction tube from the suction tube connector can be reduced, the probability of the blood entering the connecting tube and the drip part is reduced, and the cross infection caused by blood pollution is reduced; on the other hand, the aperture of the two is kept the same, the speed of sucking blood by the capillary suction tube is not influenced, and the function of sucking blood by the capillary suction tube is not influenced. In the specific embodiment of the utility model, the specific size of the inner diameter of the connecting port of the straw connector can be designed and adjusted according to products with different specifications, for example, in a micro blood collection straw with the specification of 10 mu l, the inner diameter of the capillary straw is 0.68mm, and the inner diameter of the connecting port is 0.68mm. In a 20. Mu.l-sized micropipette, the capillary pipette had an inner diameter of 0.88mm and the connecting port had an inner diameter of 0.88mm. In a 30. Mu.l-sized micropipette, the inner diameter of the capillary pipette was 0.95mm, and the inner diameter of the connection port was 0.95mm. In a 40. Mu.l-sized micropipette, the capillary pipette had an inner diameter of 1.16mm and the connecting port had an inner diameter of 1.16mm. In a 60. Mu.l-sized micropipette, the capillary pipette had an inner diameter of 1.16mm and the connecting port had an inner diameter of 1.16mm. In a 100. Mu.l-sized micropipette, the capillary pipette had an inner diameter of 1.25mm and the connecting port had an inner diameter of 1.25mm.
In addition, the solution of this embodiment is to reduce the internal diameter of the connector port of the micropipette so that the internal diameter of the connector port is the same as or equal to the capillary pore diameter, and reduce the blood contamination caused during the blood collection process by reducing the internal diameter of the connector port. Based on this solution, the internal diameter of the connection port and the capillary aperture do not need to be completely identical, but the internal diameter of the connection port and the capillary aperture may be set to be quite horizontal, i.e. the internal diameter of the connection port and the capillary aperture differ by no more than 0.2-1mm, more preferably the internal diameter of the connection port and the capillary aperture differ by no more than 0.2mm. For example, in a 10. Mu.l-sized micropipette, the capillary pipette has an inner diameter of 0.68mm and the connection port has an inner diameter of 0.48 to 0.88mm. In a 20. Mu.l-sized micropipette, the capillary pipette had an inner diameter of 0.88mm and the connecting port had an inner diameter of 0.68 to 1.08mm. In a 30. Mu.l-sized micropipette, the inner diameter of the capillary pipette is 0.95mm, and the inner diameter of the connection port is 0.75-1.15mm. In a 40. Mu.l-sized micropipette, the inner diameter of the capillary pipette is 1.16mm, and the inner diameter of the connection port is 0.96-1.36mm. In a 60. Mu.l-sized micropipette, the capillary pipette had an inner diameter of 1.16mm and the connecting port had an inner diameter of 0.96-1.36mm. In a 100. Mu.l-sized micropipette, the inner diameter of the capillary pipette is 1.25mm, and the inner diameter of the connection port is 1.05-1.45mm. In this embodiment, the inner diameter dimensions of the connector ports of the micro-blood collection straws with different specifications are exemplarily listed, and a person skilled in the art can set more micro-blood collection straws with different specifications and different dimensions according to the principles of the present utility model, so long as the inner diameter of the connector port and the capillary aperture remain the same or equivalent level, these different designs are all within the protection scope of the present utility model, for example, in order to achieve more blood collection amount, the inner diameter of the capillary straw and the inner diameter of the connector port can be increased to 1.3-5.0mm at the same time, and these alternative technical schemes are all within the protection scope of the present utility model.
In order to further enhance the anti-pollution effect, in one embodiment of the present utility model, the structure of the connection port is further improved. Referring to fig. 4a and 4b, fig. 4a is a schematic plan view of a capillary tube and a suction connector according to a modified embodiment, and fig. 4b is a schematic perspective view of the capillary tube and the suction connector shown in fig. 4 a. A micro blood sampling straw comprises a capillary straw and a straw connector, wherein a penetrating blood sampling channel is arranged in the capillary straw, a connecting port is arranged at the connecting part of the straw connector and a connecting pipe, the outline of the outer surface of the connecting port is matched with the inner surface of the connecting pipe, and the connecting pipe can be inserted into the outer surface of the connecting port; the inside chamber that holds that forms of connector holds the bottom surface that the chamber is close to the capillary straw and is equipped with the through-hole, through-hole and blood sampling passageway UNICOM, the diameter of through-hole set to be the same or equivalent with blood sampling passageway diameter, hold the diameter in chamber and be greater than or equal to the diameter of through-hole. The advantage of setting up the chamber of holding in the connector is that: a buffer area is formed between the suction tube connector and the connecting tube, even if part of blood flows out of the through hole in the blood sampling process, a small amount of blood can be accumulated in the accommodating cavity, the connecting tube and the dripping head part cannot be polluted immediately, the probability that the blood enters the connecting tube and the dripping head part is reduced, and cross infection caused by blood pollution is reduced. In a preferred embodiment of the present utility model, fig. 4a and 4b exemplarily show that the accommodating cavity is funnel-shaped, that is, the diameter of the through hole of the accommodating cavity near the bottom end of the capillary tube is minimum, the diameter of the upper end of the accommodating cavity is gradually increased, those skilled in the art can set the accommodating cavity to other shapes according to the principles of the present utility model, and as long as the diameter of the accommodating cavity is greater than or equal to the diameter of the through hole, these different designs are all within the scope of the present utility model, for example, in order to maintain that the accommodating cavity is not easy to flow out from the upper end, the accommodating cavity is set to have a small diameter of the opening at the upper end and a small diameter of the opening at the lower end, and the cross section of the accommodating cavity with a large middle diameter is an oval or a circular shape, which are all the alternative technical solutions are within the scope of the present utility model.
In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "bottom", "upper", "lower", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or components referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the protection of the present utility model.
It should be noted that the foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and additions may be made by those skilled in the art without departing from the principles of the present utility model, which modifications and additions should also be construed as falling within the scope of the present utility model.
Claims (5)
1. The utility model provides a micro blood sampling straw, includes capillary straw, straw joint, takeover and water dropper, is equipped with the blood sampling passageway in capillary straw, is the connector in the part that straw joint and takeover connect, is equipped with the through-hole in the connector, its characterized in that, the width of through-hole is the same with blood sampling passageway width or the width of through-hole and blood sampling passageway width differ not more than 0.2-1mm.
2. The micropipette of claim 1 wherein the width of the through-hole is the same as the width of the lancing channel or the width of the through-hole differs from the lancing channel by no more than 0.2mm.
3. The micropipette of claim 2 wherein the capillary suction tube and through-hole dimensions are as follows:
a. the inner diameter of the capillary suction tube is 0.68mm, and the inner diameter of the through hole is 0.48-0.88mm; or (b)
b. The inner diameter of the capillary suction tube is 0.88mm, and the inner diameter of the through hole is 0.68-1.08mm; or (b)
c. The inner diameter of the capillary suction tube is 0.95mm, and the inner diameter of the through hole is 0.75-1.15mm; or (b)
d. The inner diameter of the capillary suction tube is 1.16mm, and the inner diameter of the through hole is 0.96-1.36mm; or (b)
e. The inner diameter of the capillary suction tube is 1.25mm, and the inner diameter of the through hole is 1.05-1.45mm.
4. A micropipette according to claim 3, wherein the dimensions of the capillary suction tube and the through-hole are as follows:
a. the inner diameter of the capillary suction tube is 0.68mm, and the inner diameter of the through hole is 0.68mm; or (b)
b. The inner diameter of the capillary suction tube is 0.88mm, and the inner diameter of the through hole is 0.88mm; or (b)
c. The inner diameter of the capillary suction tube is 0.95mm, and the inner diameter of the through hole is 0.95mm; or (b)
d. The inner diameter of the capillary suction tube is 1.16mm, and the inner diameter of the through hole is 1.16mm; or (b)
e. The inner diameter of the capillary suction tube is 1.25mm, and the inner diameter of the through hole is 1.25mm.
5. The micropipette according to any one of claims 1-4, wherein a receiving cavity is formed inside the connecting port, a bottom surface of the receiving cavity, which is close to the capillary suction tube, is a through hole, and a diameter of the receiving cavity is greater than or equal to a diameter of the through hole.
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| CN202320995934.8U CN220175117U (en) | 2023-04-27 | 2023-04-27 | Micro blood sampling straw |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320995934.8U CN220175117U (en) | 2023-04-27 | 2023-04-27 | Micro blood sampling straw |
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| CN220175117U true CN220175117U (en) | 2023-12-15 |
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