CN212438622U

CN212438622U - Self-suction quantitative micro blood collector

Info

Publication number: CN212438622U
Application number: CN202021793087.XU
Authority: CN
Inventors: 陆军; 王纲; 王微
Original assignee: Hangzhou Bosure Biotech Co ltd
Current assignee: Hangzhou Bosure Biotech Co ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-02-02
Anticipated expiration: 2030-08-25

Abstract

The utility model provides a from inhaling formula ration micro-hemostix belongs to medical instrument technical field, be equipped with sample suction pipe and gasbag chamber in the hemostix, the bottom and the external atmosphere intercommunication of sample suction pipe, the top of sample suction pipe with gasbag chamber intercommunication, on the hemostix with gasbag chamber department of correspondence is equipped with gasbag chamber extrusion portion, be equipped with the capillary hole on the hemostix, the external atmosphere of capillary hole intercommunication with sample suction pipe, sample suction pipe arrives from sample suction pipe bottom capillary hole's volume is a blood sampling volume.

Description

Self-suction quantitative micro blood collector

Technical Field

The utility model belongs to the technical field of medical instrument, especially, relate to a from inhaling formula ration trace hemostix.

Background

Traditional micro-blood collection tube is hollow glass capillary, and the pipe shaft mark has corresponding scale mark, need artificial stopping to inhale the appearance when absorbing blood sample and reacing the scale mark, need cooperate the rubber head to plug up one end gas pocket during the application of sample and just can extrude, and the operation is complicated, and the inaccuracy is also inconvenient.

Patent No. CN104116513A discloses a self-priming quantitative micro blood collection tube, which comprises a micro tube with two open ends and communicated with each other, and a hollow squeezable air bag with one open end. The micro tube is made of hydrophilic materials, one side of the micro tube is inserted into and fixed in the port of the air bag, the inner cavity of the micro tube is communicated with the inner cavity of the air bag, and the wall of the air bag is provided with a vent hole communicated with the inner cavity of the air bag. The invention can realize automatic sample suction, but the vent hole on the air bag still needs to be blocked by fingers and then extruded when the sample is added. In the practical use process, the air hole is easy to be blocked, the air bag is extruded, and the sample cannot be extruded out, so that the sample is easy to be sucked into the plastic dropper from the glass capillary tube due to the rebound of the air bag when the secondary sample adding is carried out, the sample cannot be extruded out from the glass capillary tube again, and the sample loss is caused. In addition, because the volume of the micro-tube is determined by the inner diameter, the production process of the glass capillary tube is melting and stretching, the control precision of the inner diameter is not high enough, the volume deviation is large during production, and the quality control is difficult.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the technical problem and providing a self-suction quantitative micro blood collector.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a from inhaling formula ration micro-hemostix, be equipped with sample suction pipe and gasbag chamber in the hemostix, the bottom and the external atmosphere intercommunication of sample suction pipe, the top of sample suction pipe with gasbag chamber intercommunication, on the hemostix with gasbag chamber department of correspondence is equipped with gasbag chamber extrusion portion, be equipped with the capillary hole on the hemostix, the external atmosphere of capillary hole intercommunication with sample suction pipe, sample suction pipe is from sample suction pipe bottom to the volume of capillary hole department is once the volume of taking a sample.

Preferably, the hemostix includes a front substrate, a middle substrate and a rear substrate, wherein the middle substrate is provided with a sample suction groove and an air bag groove, the sample suction groove and the air bag groove are both front and rear through grooves, the front substrate and the rear substrate are respectively fixedly connected with the front surface and the rear surface of the middle substrate, and the front substrate and the rear substrate are blocked to form the sample suction pipe and the air bag cavity.

Preferably, the cross-sectional area of the pipette is 0.04 mm square to 9 mm square.

Preferably, the cross section of the sample suction groove is square, and the width of the sample suction groove is 0.2-3 mm.

Preferably, the capillary hole is disposed on the front substrate, and the front substrate is a transparent or translucent substrate.

Preferably, the thickness of the front substrate is 0.01 mm to 0.5 mm.

Preferably, the thickness of the middle substrate is 0.1 mm to 2 mm.

Preferably, the thickness of the rear substrate is 0.01 mm to 0.5 mm.

Preferably, the front substrate and/or the rear substrate is coated with a hydrophilic coating on a side connected to the middle substrate.

Preferably, the bottom end of the blood collector protrudes downwards, and the bottom end of the sample suction tube is arranged at the bottommost part of the blood collector.

After the technical scheme is adopted, the utility model has the advantages of as follows:

the hemostix can automatically take blood with fixed volume when sampling blood, and can automatically stop sample suction without manually stopping sample suction; when the sample is added, the air vent on the air bag is not required to be blocked by fingers and then extruded, and the blood sample can be extruded by pressing the extruding part of the air bag cavity; the thickness of the middle substrate, the width of the liquid suction groove and the opening position of the capillary hole are easy to detect and control, and the liquid suction amount is more accurate than that of a micro-tube with the controlled inner diameter.

Drawings

Fig. 1 is a schematic structural view of a self-priming quantitative micro blood collector of the present invention;

FIG. 2 is an exploded view of the self-priming quantitative micro blood collector of the present invention;

in the figure:

1-a front substrate; 2-middle substrate; 3-a rear substrate; 4-capillary pore; 5-a balloon cavity; 6-a sample sucking pipe; 7-blood sampling port.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-2, a self-priming quantitative micro blood collector is provided with a sample suction tube 6 and a balloon cavity 5.

Inhale the bottom and the external atmosphere intercommunication of appearance pipe 6, inhale the top of appearance pipe 6 with 5 intercommunications in gasbag chamber, on the hemostix with the department that corresponds in gasbag chamber 5 is equipped with gasbag chamber extrusion portion. Be equipped with capillary 4 on the hemostix, capillary 4 intercommunication external atmosphere with inhale appearance pipe 6.

The bottom of the hemostix is communicated with the sample suction tube 6 to form a blood collection port 7. When the blood sampling port 7 contacts with the blood sample, the sample is automatically sucked into the sample suction pipe 6 due to the capillary action, and when the liquid reaches the capillary hole 4, the sample is automatically stopped from being sucked due to the fact that the capillary hole 4 is blocked by the blood sample. The volume of the sample suction tube 6 from the bottom end of the sample suction tube 6 to the capillary 4 is the blood sampling volume once. When the pressing part of the air sac cavity is pressed, the capillary force of the capillary hole 4 is larger than that of the sample suction pipe 6, so that the sample in the sample suction pipe 6 is squeezed out, and liquid drops are formed at the blood collection port 7.

The diameter of the sample suction tube 6 is small enough to allow the blood sample to be sucked into the sample suction tube 6 by capillary action; meanwhile, the pipe diameter of the sample suction pipe 6 is not too large, if the pipe diameter is too large, a blood sample with the same micro volume is sucked, and the distance from the capillary hole 4 to the blood collection port 7 is too short, so that the sample flows out. Therefore, it is preferable that the cross-sectional area of the pipette 6 is 0.04 mm square to 9 mm square.

In this embodiment, the blood collection device includes a front substrate 1, a middle substrate 2, and a rear substrate 3. The middle substrate 2 is provided with a sample sucking groove and an air bag groove, and the sample sucking groove and the air bag groove are both front and back through grooves. The front substrate 1 and the rear substrate 3 are respectively fixedly connected with the front surface and the rear surface of the middle substrate 2, the front substrate 1 and the rear substrate 3 are used for plugging the sample suction groove and the front side and the rear side of the air bag groove to form the sample suction pipe 6 and the air bag cavity 5.

The shape of the balloon cavity 5 can be square, round or oval.

Preferably, the cross section of the sample suction groove is square, and the width of the sample suction groove is 0.2-3 mm. The area of the capillary hole 4 is smaller than the cross section area of the sample suction groove. In this embodiment, the width of the sample suction groove is 1mm, and the area of the capillary 4 is 0.12 mm.

The capillary hole 4 is arranged on the front substrate 1, and the front substrate 1 is a transparent or semitransparent substrate, so that a blood sample can be observed conveniently during sampling. It is understood that the capillary holes 4 can be disposed on the front substrate 1, the back substrate 3, or the side of the middle substrate 2, as long as the capillary holes 4 are communicated with the sample suction pipes 6.

Preferably, the thickness of the front substrate 1 is 0.01 mm to 0.5 mm; the thickness of the middle substrate 2 is 0.1 mm-2 mm; the thickness of the rear substrate 3 is 0.01 mm to 0.5 mm. In this embodiment, the thickness of the front substrate 1 is 0.1 mm; the thickness of the middle substrate 2 is 0.5 mm; the thickness of the rear substrate 3 is 0.1 mm.

The front substrate 1 is a PVC/PET/PC substrate; the middle substrate 2 is a PET/PS/PVC substrate; the rear substrate 3 is a PVC/PET/PC substrate.

The front substrate 1 and/or the rear substrate 3 are coated with a hydrophilic coating on the side connected to the middle substrate 2. The front substrate 1 and the middle substrate 2, and the rear substrate 3 and the middle substrate 2 are bonded and fixed by adhesive materials, wherein the adhesive materials include but are not limited to double-sided adhesive, hot melt adhesive and UV adhesive.

The bottom of hemostix is protruding downwards, and in this embodiment, the bottom of hemostix is ︺ shape, can understand, the bottom of hemostix also can be semicircular in shape or oval or V font, the bottom setting of inhaling appearance pipe 6 is in the bottommost of hemostix. This structure ensures that the blood sampling port 7 is in complete contact with the blood sample.

The volume of the blood sample sucked into the blood collection device at this time is equal to the width d of the sample suction groove, the thickness h of the middle substrate 2, and the distance L from the capillary 4 to the blood collection port 7. If the width of the sample suction groove is 1mm, the thickness of the middle substrate 2 is 0.5mm, and the distance from the capillary 4 to the blood collection port 7 is 10mm, the volume of the inhalable blood sample is 5 uL. The liquid absorption amount can be controlled by adjusting the width of the sample absorption groove, the thickness of the middle substrate 2 and the opening position of the capillary hole 4.

In addition to the preferred embodiments described above, other embodiments of the present invention are also possible, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, which should fall within the scope of the present invention defined by the appended claims.

Claims

1. The utility model provides a from inhaling formula ration micro-hemostix, its characterized in that, be equipped with in the hemostix and inhale appearance pipe (6) and gasbag chamber (5), the bottom and the external atmosphere intercommunication of appearance pipe (6) inhale, the top of appearance pipe (6) with gasbag chamber (5) intercommunication, on the hemostix with gasbag chamber (5) department of correspondence is equipped with gasbag chamber extrusion portion, be equipped with capillary hole (4) on the hemostix, capillary hole (4) communicate external atmosphere with inhale appearance pipe (6), inhale appearance pipe (6) from inhaling appearance pipe (6) bottom extremely the volume of capillary hole (4) department is once the volume of taking a blood sample.

2. The self-priming quantitative micro hemostix according to claim 1, wherein the hemostix comprises a front substrate (1), a middle substrate (2) and a rear substrate (3), the middle substrate (2) is provided with a sample-sucking groove and an air bag groove, the sample-sucking groove and the air bag groove are front and rear through grooves, the front substrate (1) and the rear substrate (3) are respectively fixedly connected with the front surface and the rear surface of the middle substrate (2), and the front substrate (1) and the rear substrate (3) block the sample-sucking groove and the front side and the rear side of the air bag groove to form the sample-sucking tube (6) and the air bag cavity (5).

3. The self-priming quantitative micro blood collector according to claim 1 or 2, wherein the cross-sectional area of the sample suction tube (6) is 0.04 mm to 9 mm.

4. The self-priming quantitative micro blood collector as claimed in claim 2, wherein the cross section of the sample suction groove is square, and the width of the sample suction groove is 0.2-3 mm.

5. The self-priming quantitative micro blood collector according to claim 2, wherein the capillary (4) is disposed on the front substrate (1), and the front substrate (1) is a transparent or translucent substrate.

6. The self-priming quantitative micro blood collector according to claim 2, wherein the thickness of the front substrate (1) is 0.01 mm to 0.5 mm.

7. The self-priming quantitative micro blood collector according to claim 2, wherein the thickness of the middle substrate (2) is 0.1 mm-2 mm.

8. The self-priming quantitative micro blood collector according to claim 2, wherein the thickness of the rear substrate (3) is 0.01 mm to 0.5 mm.

9. The self-priming quantitative micro blood collector according to claim 2, wherein the front substrate (1) and/or the rear substrate (3) is coated with a hydrophilic coating on the side connected to the middle substrate (2).

10. The self-priming quantitative micro-hemostix according to claim 1, 2, 4, 5, 6, 7, 8 or 9, wherein the bottom end of the hemostix is downwardly convex, and the bottom end of the sample suction tube (6) is disposed at the bottom of the hemostix.