A blood sampling device

Abstract

The present invention discloses a sampling and blood separation device, comprising: a sampling needle, a first cavity, a second cavity and a negative pressure source component; the sampling needle is connected to the first cavity; the two ends of the second cavity are respectively connected to the first cavity and the negative pressure source component; the negative pressure source component is used to introduce negative pressure into the second cavity when connected to the second cavity; the sampling needle is used to pierce into a blood collection tube, and the second cavity is used to introduce negative pressure into the first cavity when connected to the first cavity, so that the pressure in the sampling needle forms a balance with the negative pressure in the blood collection tube to be pierced. The present invention simplifies the sampling structure, does not need to make a complex deflation structure on the sampling needle, and only punctures once each time sampling, which has the advantages of improving the life of the sampling needle and the sampling speed.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a blood sampling and separation device. Background Art

[0002] In the current sampling needle device, the inside of the test tube is filled with negative pressure before the sample is collected. Since the amount of sample collected is not fixed, there will be a certain residual pressure in the test tube. It is necessary to release the residual pressure in the test tube through automatic sampling or closed sampling fully automatic immunoassay analyzer. Usually, a sampling needle with a lateral air venting groove is used to release the residual pressure in the test tube. The air venting groove of the sampling needle is processed on the outer surface. In usage, two punctures are required for one sampling. The first time is for deflation and the second time is for sample collection. This usage reduces the life of the sampling needle by half and increases the sampling time. At the same time, the friction between the air venting groove and the test tube cap will produce more puncture debris. Summary of the invention

[0003] The purpose of the present invention is to provide a sampling and blood separation device, which aims to solve the problem that the existing sampling needle device needs to perform two punctures when in use, resulting in the life of the sampling needle being halved and the sampling time being increased.

[0004] In order to solve the above technical problems, the object of the present invention is achieved through the following technical solutions: providing a sampling and blood separation device, comprising: a sampling needle, a first cavity, a second cavity and a negative pressure source component;

[0005] The sampling needle is connected to the first cavity; the two ends of the second cavity are respectively connected to the first cavity and the negative pressure source component; the negative pressure source component is used to introduce negative pressure into the second cavity when connected to the second cavity; the sampling needle is used to pierce the blood collection tube, and the second cavity is used to introduce negative pressure into the first cavity when connected to the first cavity, so that the pressure in the sampling needle is balanced with the negative pressure in the blood collection tube to be pierced.

[0006] Furthermore, the sampling and blood separation device also includes: a sampling drive unit, which is arranged on the second cavity and connected to the first cavity through the second cavity; the two ends of the first cavity are respectively connected to the sampling drive unit and the sampling needle, and the sampling drive unit is used to form an air column of a preset volume at the sampling port of the sampling needle through the movement of the sampling drive unit before the sampling needle is inserted into the blood collection tube.

[0007] Furthermore, two ends of the second cavity are respectively connected to the first cavity and the negative pressure source component.

[0008] Furthermore, the negative pressure source assembly is a vacuum chamber for providing negative pressure.

[0009] Furthermore, a first switching element for controlling the on-off between the first cavity and the second cavity is provided at the connection between the first cavity and the second cavity; a second switching element for controlling the on-off between the second cavity and the negative pressure source assembly is provided at the connection between the second cavity and the negative pressure source assembly.

[0010] Furthermore, the first cavity includes a first pipeline, and two ends of the first pipeline are respectively connected to the sampling needle and the first switching element.

[0011] Furthermore, the second cavity includes a second pipeline and a third pipeline, two ends of the second pipeline are respectively connected to the first switching element and the sampling drive unit; two ends of the third pipeline are respectively connected to the sampling drive unit and the second switching element.

[0012] Furthermore, the sampling and blood separation device also includes a cleaning drive unit, a cleaning liquid reagent barrel, a fourth pipeline, a fifth pipeline, a sixth pipeline and a seventh pipeline.

[0013] The two ends of the fourth pipeline are respectively connected to the second switching element and the fifth pipeline; the two ends of the fifth pipeline are respectively connected to the cleaning drive unit and the sixth pipeline; the two ends of the sixth pipeline are respectively connected to the fifth pipeline and the cleaning liquid reagent barrel; the two ends of the seventh pipeline are respectively connected to the fifth pipeline and the vacuum chamber.

[0014] Furthermore, a third switching element for controlling on and off is provided between the fifth pipeline, the sixth pipeline and the seventh pipeline, the fifth pipeline is connected to the normally-on end of the third switching element, the sixth pipeline and the seventh pipeline are respectively connected to the first switching end and the second switching end of the third switching element; a sixth switching element for controlling on and off between the seventh pipeline and the vacuum chamber is provided at the connection between the seventh pipeline and the vacuum chamber.

[0015] Furthermore, the sampling and blood separation device further comprises: a cleaning swab, an eighth pipeline, and a ninth pipeline arranged on the outer wall of the sampling needle;

[0016] The two ends of the eighth pipeline are respectively connected to the seventh pipeline and the liquid inlet of the cleaning swab, and the two ends of the ninth pipeline are respectively connected to the liquid outlet of the cleaning swab and the vacuum chamber.

[0017] Furthermore, the eighth pipeline is provided with a fourth switching element for connecting or disconnecting; and the connection between the ninth pipeline and the vacuum chamber is provided with a fifth switching element.

[0018] Furthermore, the sampling and blood separation device also includes: a waste liquid barrel, which is connected to the vacuum chamber and is used to collect waste liquid and gas.

[0019] Furthermore, the sampling and blood separation device also includes: a waste liquid pump, the two ends of which are respectively connected to the vacuum chamber and the waste liquid barrel, and the waste liquid pump is used to pump the waste liquid and waste gas in the vacuum chamber into the waste liquid barrel.

[0020] Furthermore, the sampling and blood separation device also includes: an air pressure sensor, which is arranged on the vacuum chamber and is used to detect the air pressure in the vacuum chamber.

[0021] Furthermore, the sampling needle device also includes: a pressure sensor, which is arranged on the fourth pipeline or the fifth pipeline and is used to detect the liquid pressure in the pipeline.

[0022] The embodiment of the present invention provides a sampling and blood separation device, including: a sampling needle, a first cavity, a second cavity and a negative pressure source assembly; the sampling needle is connected to the first cavity; the two ends of the second cavity are respectively connected to the first cavity and the negative pressure source assembly; the negative pressure source assembly is used to introduce negative pressure into the second cavity when connected to the second cavity; the sampling needle is used to pierce into a blood collection tube, and the second cavity is used to introduce negative pressure into the first cavity when connected to the first cavity, so that the pressure in the sampling needle is balanced with the negative pressure in the blood collection tube to be pierced. The embodiment of the present invention simplifies the sampling structure, does not need to make a complex air release structure on the sampling needle, and only punctures once each time sampling, which has the advantages of improving the life of the sampling needle and the sampling speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0024] Figure 1 A schematic diagram of the structure of a sampling and blood separation device provided in an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the structure of a sampling system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0028] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0029] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0030] Combination Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a sampling and blood separation device, comprising: a sampling needle SP, a first cavity, a second cavity and a negative pressure source component;

[0031] The sampling needle SP is connected to the first cavity; the two ends of the second cavity are respectively connected to the first cavity and the negative pressure source component; the negative pressure source component is used to introduce negative pressure into the second cavity when connected to the second cavity; the sampling needle SP is used to pierce the blood collection tube, and the second cavity is used to introduce negative pressure into the first cavity when connected to the first cavity, so that the pressure in the sampling needle SP is balanced with the negative pressure in the blood collection tube to be pierced.

[0032] In this embodiment, the sampling and blood separation device is suitable for collecting samples in a sample tube, and is more commonly used for collecting blood samples in a blood collection tube. The sampling needle SP is used to puncture the blood collection tube for sampling.

[0033] Before the sampling needle SP in this embodiment pierces the blood collection tube, pressure is first built up through the first cavity and the second component; specifically:

[0034] An air column is formed in the sampling needle SP through the first cavity, so that the sampling needle SP can resist the negative pressure retained in the blood collection tube when it is inserted into the blood collection tube; the second cavity and the negative pressure source component are connected, and the negative pressure in the negative pressure source component is introduced into the second cavity, and the connection state is disconnected after the introduction, so that negative pressure is established in the second cavity.

[0035] After the pressure is built up, the sampling needle SP can resist the negative pressure remaining in the blood collection tube when it penetrates into the blood collection tube, and after the sampling needle SP penetrates into the blood collection tube to a preset depth, the second cavity and the first cavity are connected, so that the negative pressure in the second cavity is introduced into the first cavity, thereby forming a balance between the pressure in the sampling needle SP and the negative pressure in the blood collection tube.

[0036] In this embodiment, the negative pressure constructed in the second cavity can balance the negative pressure generated in the sampling needle SP after the sampling needle SP is inserted into the blood collection tube. Compared with the prior art that requires deflation before puncture for blood collection, the puncture and deflation steps are omitted, so only one puncture is required, which can increase the service life of the puncture needle and reduce the user's maintenance cost and usage cost.

[0037] In one embodiment, the sampling and blood separation device also includes: a sampling drive unit A1; the sampling drive unit A1 is arranged on the second cavity and is connected to the first cavity through the second cavity, and the two ends of the first cavity are respectively connected to the sampling drive unit A1 and the sampling needle SP, and the sampling drive unit A1 is used to form an air column of a preset volume at the sampling port of the sampling needle SP through the movement of the sampling drive unit A1 before the sampling needle SP is inserted into the blood collection tube.

[0038] In this embodiment, the sampling drive unit A1 can be a sampling syringe, which is used to absorb the sample in the blood collection tube. Before the sampling needle SP pierces the blood collection tube, the internal air pressure of the first cavity and the sampling needle SP can be squeezed by controlling the operation of the sampling syringe (injection action), thereby forming an air column of a preset volume at the sampling port of the sampling needle SP. When the sampling needle SP is inserted into the blood collection tube, the air column can be used to resist the negative pressure retained in the blood collection tube to prevent the reagent from flowing into the blood collection tube.

[0039] In one embodiment, two ends of the second cavity are respectively connected to the first cavity and the negative pressure source assembly.

[0040] In this embodiment, negative pressure is introduced into the second cavity through the negative pressure source assembly, so that negative pressure is established in the second cavity. After the sampling needle SP penetrates into the blood collection tube, the negative pressure in the second cavity is introduced into the first cavity, and the pressure in the sampling needle SP is balanced with the negative pressure in the blood collection tube to be penetrated.

[0041] Furthermore, the negative pressure source component in this embodiment may be a vacuum chamber C, which is a cavity with a certain volume and is used to provide negative pressure for the second cavity.

[0042] In one embodiment, a first switching element SV1 for controlling the on-off between the first cavity and the second cavity is provided at the connection between the first cavity and the second cavity; a second switching element SV2 for controlling the on-off between the second cavity and the negative pressure source assembly is provided at the connection between the second cavity and the negative pressure source assembly.

[0043] In this embodiment, the first switching element SV1 and the second switching element SV2 are both valves, which participate in controlling the early pressure building and the later blood collection process. Specifically:

[0044] Early pressure building stage: First, open the first switching element SV1, move the sampling drive unit A1 and establish a positive pressure air column, then close the first switching element SV1, at this time, the first cavity has a certain positive pressure. Then, open the second switching element SV2 to connect the second cavity and the vacuum chamber C, so that the negative pressure in the vacuum chamber C can be introduced into the second cavity, and then disconnect the second switching element SV2 to complete the pressure building of the second cavity, and at this time, the second cavity has a certain negative pressure.

[0045] The process of blood collection: control the sampling needle SP to be inserted into the blood collection tube, and use the air column in the sampling needle SP to resist the residual negative pressure in the blood collection tube; then open the first switching element SV1 to connect the first cavity and the second cavity, and the negative pressure of the second cavity is introduced into the first cavity to balance the negative pressure in the blood collection tube; and after the negative pressure in the first cavity, the second cavity and the blood collection tube is stable (reaching equilibrium), control the sampling drive unit A1 to start extracting samples.

[0046] In one embodiment, the first cavity includes a first pipeline TP1 , and two ends of the first pipeline TP1 are respectively connected to the sampling needle SP and the first switching element SV1 .

[0047] In this embodiment, the first pipeline TP1 is made of a colloid material with deformation characteristics, and the space inside the sampling needle SP and the space inside the first pipeline TP1 serve as the first cavity.

[0048] In one embodiment, the second cavity includes a second pipeline TP2 and a third pipeline TP3. Both ends of the second pipeline TP2 are respectively connected to the first switching element SV1 and the sampling drive unit A1. Both ends of the third pipeline TP3 are respectively connected to the sampling drive unit A1 and the second switching element SV2.

[0049] In this embodiment, the second pipeline TP2 is also made of a colloid material with deformation characteristics, and the inner cavity of the second pipeline TP2, the third pipeline TP3 and the sampling drive unit A1 serves as the second cavity.

[0050] In one embodiment, the sampling and blood separation device further includes a cleaning drive unit A2, a cleaning liquid reagent barrel D, a fourth pipeline TP4, a fifth pipeline TP5, a sixth pipeline TP6 and a seventh pipeline TP7;

[0051] The two ends of the fourth pipeline TP4 are respectively connected to the second switching element SV2 and the fifth pipeline TP5; the two ends of the fifth pipeline TP5 are respectively connected to the cleaning drive unit A2 and the sixth pipeline TP6; the two ends of the sixth pipeline TP6 are respectively connected to the fifth pipeline TP5 and the cleaning liquid reagent barrel D; the two ends of the seventh pipeline TP7 are respectively connected to the fifth pipeline TP5 and the vacuum chamber C.

[0052] Furthermore, a third switching element SV3 for controlling on and off is provided between the fifth pipeline TP5, the sixth pipeline TP6 and the seventh pipeline TP7, the fifth pipeline TP5 is connected to the normally-on end of the third switching element SV3, the sixth pipeline TP6 is connected to the first switching end of the third switching element SV3, and the seventh pipeline TP7 is connected to the second switching end of the third switching element SV3; a sixth switching element SV6 for controlling the on and off of the seventh pipeline TP7 and the vacuum chamber C is provided at the connection between the seventh pipeline TP7 and the vacuum chamber C.

[0053] In this embodiment, the cleaning drive unit A2 may be a cleaning syringe, and the cleaning liquid reagent barrel D stores cleaning liquid.

[0054] In this embodiment, the inner wall of the sampling needle SP and each pipeline can be cleaned after blood collection.

[0055] The specific cleaning process is: connect the normally-on end of the third switching element SV3 to the first switching end, and suck the cleaning liquid from the cleaning liquid reagent barrel D through the cleaning drive unit A2. Then control the normally-on end of the third switching element SV3 to connect to the second switching end, open the second switching element SV2 and the first switching element SV1, and control the cleaning drive unit A2 to transport the cleaning liquid to the inner wall of the sampling needle SP for cleaning. During the transportation process, the cleaning liquid also cleans the first pipeline TP1, the second pipeline TP2, the inner cavity of the sampling drive unit A1, and the third pipeline TP3.

[0056] In one embodiment, the sampling and blood separation device further includes: a cleaning swab SZ, an eighth pipeline TP8, and a ninth pipeline TP9 disposed on the outer wall of the sampling needle SP;

[0057] Both ends of the eighth pipeline TP8 are connected to the seventh pipeline TP7 and the liquid inlet of the cleaning swab SZ, respectively. Both ends of the ninth pipeline TP9 are connected to the liquid outlet of the cleaning swab SZ and the vacuum chamber C, respectively.

[0058] Furthermore, a fourth switching element SV4 for connection or disconnection is provided on the eighth pipeline TP8; and a fifth switching element SV5 is provided at the connection between the ninth pipeline TP9 and the vacuum chamber C.

[0059] This embodiment can clean the outer wall of the sampling needle SP after blood collection.

[0060] The specific cleaning process is: control the normally-on end of the third switching element SV3 to be connected to the second switching end, and open the fourth switching element SV4 and the fifth switching element SV5, and then control the cleaning drive unit A2 to deliver cleaning liquid to the cleaning swab SZ to clean the outer wall of the sampling needle SP, and discharge the waste liquid after cleaning into the vacuum chamber C.

[0061] In one embodiment, the sampling and blood separation device further comprises: a waste liquid bucket E, which is connected to the vacuum chamber C and is used to collect waste liquid and gas. The waste liquid bucket E is mainly used to collect waste liquid and gas generated during the cleaning process for easy recycling.

[0062] In one embodiment, the sampling and blood separation device further includes: a waste liquid pump LP, the two ends of which are respectively connected to the vacuum chamber C and the waste liquid barrel E, and the waste liquid pump LP is used to pump the waste liquid and waste gas in the vacuum chamber C into the waste liquid barrel E. The waste liquid pump LP provides suction force, so that the waste liquid or gas in the vacuum chamber C can be discharged into the waste liquid barrel E better and faster.

[0063] In one embodiment, the sampling and blood separation device further includes: an air pressure sensor B1, which is disposed on the vacuum chamber C and is used to detect the air pressure in the vacuum chamber C.

[0064] In this embodiment, during the process of building pressure and drawing blood, the vacuum chamber C continuously delivers negative pressure. After long-term use, when the air pressure sensor B1 detects that the air pressure in the vacuum chamber C is lower than the preset air pressure threshold, the waste liquid pump LP is automatically controlled to start and discharge the waste liquid or gas in the vacuum chamber C into the waste liquid barrel E.

[0065] In one embodiment, the sampling needle SP device further includes: a pressure sensor B2, which is disposed on the fourth pipeline TP4 or the fifth pipeline TP5 and is used to detect the liquid pressure in the pipeline.

[0066] In this embodiment, the pressure sensor B2 is used to detect the liquid pressure of the cleaning fluid in the pipeline. When the liquid pressure reaches a preset hydraulic threshold, negative pressure can be provided through the vacuum chamber C to reduce the liquid pressure.

[0067] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A blood sampling device, characterized in that: include: A sampling needle, a first cavity, a second cavity, a first switching element, a second switching element, and a negative pressure source assembly; The sampling needle is connected to the first cavity; one end of the second cavity is connected to the first cavity through a first switchable element, and the other end of the second cavity is connected to the negative pressure source assembly through a second switchable element; Before the sampling needle pierces the blood collection tube, the negative pressure source assembly is used to introduce negative pressure into the second cavity when the first switching element is disconnected and the second switching element is connected, and disconnect the second switching element; When the sampling needle pierces the blood collection tube, the second cavity is used to introduce negative pressure into the first cavity when the first switching element is opened and the second switching element is disconnected, so that the pressure in the sampling needle is balanced with the negative pressure in the blood collection tube.

2. The blood sampling and separation device according to claim 1, characterized in that: Also includes: A sampling drive unit, wherein the sampling drive unit is arranged on the second cavity and is connected to the first cavity through the second cavity; the two ends of the first cavity are respectively connected to the sampling drive unit and the sampling needle, and the sampling drive unit is used to form an air column of a preset volume at the sampling port of the sampling needle through the movement of the sampling drive unit before the sampling needle is inserted into the blood collection tube.

3. The blood sampling and separation device according to any one of claims 1-2, characterized in that: The negative pressure source component is a vacuum chamber for providing negative pressure.

4. The blood sampling and separation device according to any one of claims 1 to 2, characterized in that: The first cavity includes a first pipeline, and two ends of the first pipeline are respectively connected to the sampling needle and the first switching element.

5. The blood sampling and separation device according to any one of claims 1-2, characterized in that: The second cavity includes a second pipeline and a third pipeline. Two ends of the second pipeline are respectively connected to the first switching element and the sampling drive unit; two ends of the third pipeline are respectively connected to the sampling drive unit and the second switching element.

6. The blood sampling and separation device according to claim 1, characterized in that: It also includes a cleaning drive unit, a cleaning liquid reagent barrel, a fourth pipeline, a fifth pipeline, a sixth pipeline and a seventh pipeline; The two ends of the fourth pipeline are respectively connected to the second switching element and the fifth pipeline; the two ends of the fifth pipeline are respectively connected to the cleaning drive unit and the sixth pipeline; the two ends of the sixth pipeline are respectively connected to the fifth pipeline and the cleaning liquid reagent barrel; the two ends of the seventh pipeline are respectively connected to the fifth pipeline and the vacuum chamber.

7. The blood sampling and separation device according to claim 6, characterized in that: A third switching element for controlling on and off is provided between the fifth pipeline, the sixth pipeline and the seventh pipeline, the fifth pipeline is connected to the normally-on end of the third switching element, the sixth pipeline and the seventh pipeline are respectively connected to the first switching end and the second switching end of the third switching element; a sixth switching element for controlling on and off between the seventh pipeline and the vacuum chamber is provided at the connection between the seventh pipeline and the vacuum chamber.

8. The blood sampling and separation device according to claim 6, characterized in that: Also includes: A cleaning swab, an eighth pipeline, and a ninth pipeline arranged on the outer wall of the sampling needle; The two ends of the eighth pipeline are respectively connected to the seventh pipeline and the liquid inlet of the cleaning swab, and the two ends of the ninth pipeline are respectively connected to the liquid outlet of the cleaning swab and the vacuum chamber.

9. The blood sampling and separation device according to claim 8, characterized in that: The eighth pipeline is provided with a fourth switching element for connection or disconnection; the connection between the ninth pipeline and the vacuum chamber is provided with a fifth switching element.

10. The blood sampling and separation device according to claim 3, characterized in that: Also includes: A waste liquid barrel is connected to the vacuum chamber and is used for collecting waste liquid and gas.

11. The blood sampling and separation device according to claim 3, characterized in that: Also includes: A waste liquid pump, both ends of which are connected to the vacuum chamber and the waste liquid barrel respectively, and the waste liquid pump is used to pump waste liquid and waste gas in the vacuum chamber into the waste liquid barrel.

12. The blood sampling and separation device according to claim 3, characterized in that: Also includes: The air pressure sensor is arranged on the vacuum chamber and is used to detect the air pressure in the vacuum chamber.

13. The blood sampling and separation device according to claim 6, characterized in that: Also includes: The pressure sensor is arranged on the fourth pipeline or the fifth pipeline and is used to detect the liquid pressure in the pipeline.

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