Biological Fluid Collection Device and Biological Fluid Separation and Testing System

Abstract

A biological fluid collection device that is adapted to receive a blood sample having a cellular portion and a plasma portion is disclosed. After collecting the blood sample, the biological fluid collection device is able to transfer the blood sample to a point-of-care testing device or a biological fluid separation and testing device. After transferring the blood sample, the biological fluid separation and testing device is able to separate the plasma portion from the cellular portion and analyze the blood sample and obtain test results.

Claims

1. A biological fluid separation device, comprising: a rotatable body having a center of rotation, an outer periphery, and a body inlet, the body inlet adapted to receive a multi-component blood sample; a separation chamber defined within the rotatable body and in fluid communication with the body inlet and having a chamber outlet spaced apart from the body inlet, the separation chamber adapted to receive the multi-component blood sample; and a blood component chamber defined within the rotatable body and in fluid communication with the chamber outlet, wherein when the separation chamber contains the multi-component blood sample and a rotational force is applied to the rotatable body, a first blood component of the multi-component blood sample passes from the separation chamber into the blood component chamber and a second blood component of the multi-component blood sample is retained within the separation chamber, wherein the blood component chamber is disposed adjacent the center of rotation and the separation chamber is disposed adjacent the outer periphery of the rotatable body, and wherein the body inlet includes an engagement portion configured to receive a transfer device for closed transfer of a multi-component blood sample to the separation device.

2. The biological fluid separation device of claim 1, wherein the first blood component is a plasma component of the multi-component blood sample and the second blood component is a cellular component of the multi-component blood sample

3. The biological fluid separation device of claim 1, further comprising a diagnostic chamber in fluid communication with the blood component chamber.

4. The biological fluid separation device of claim 1, wherein the rotatable body is disc-shaped.

5. The biological fluid separation device of claim 1, wherein the blood component chamber receives the first blood component of the multi-component blood sample upon the rotatable body being rotated by a processing instrument.

6. The biological fluid separation device of claim 1, further comprising a diagnostic chamber in fluid communication with the blood component chamber and including a detection zone readable by a processing instrument.

7. The biological fluid separation device of claim 1, wherein the engagement portion comprises a recess configured to receive a deformable wall member of the transfer device.

8. The biological fluid separation device of claim 1, wherein the engagement portion comprises threads configured to threadably engage a portion of the transfer device.

9. The biological fluid separation device of claim 1, wherein all portions of the blood component chamber are radially closer to the center of rotation than any portion of the separation chamber.

10. The biological fluid separation device of claim 1, wherein the center of rotation is defined within the outer periphery.

11. The biological fluid separation device of claim 1, wherein the separation device is configured such that a rotational force at a first rotation rate applied to the rotatable body separates the multi-component blood sample in the separation chamber into a first component and a second component, and reduction of the rotational force from the first rotation rate to a second rotation rate, which is less than the first rotation rate, causes the second blood component of the multi-component blood sample to be driven towards the center of rotatable body through a flow channel into the blood component chamber while the second component of the multi-component blood sample is retained within the separation chamber.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above-mentioned and other features and advantages of this disclosure, and the manner of attaining them, will become more apparent and the disclosure itself will be better understood by reference to the following descriptions of embodiments of the disclosure taken in conjunction with the accompanying drawings, wherein:

[0016] FIG. 1 is a perspective view of a biological fluid collection device in accordance with an embodiment of the present invention.

[0017] FIG. 2 is an assembled, perspective view of a biological fluid collection device in accordance with an embodiment of the present invention, with a transfer cartridge received within a portion of a lancet housing.

[0018] FIG. 3 is a cross-sectional view of a portion of a biological fluid collection device in accordance with an embodiment of the present invention.

[0019] FIG. 4 is a perspective view of a biological fluid collection device in accordance with an embodiment of the present invention, with a lancet housing in a first position.

[0020] FIG. 5 is a cross-sectional view of a lancet housing in accordance with an embodiment of the present invention.

[0021] FIG. 6 is a perspective view of a biological fluid collection device in accordance with an embodiment of the present invention, with a lancet housing in a second position.

[0022] FIG. 7 is a perspective view of a transfer cartridge and a biological fluid separation and testing device in accordance with an embodiment of the present invention.

[0023] FIG. 8 is an elevation view of a biological fluid separation and testing device in accordance with an embodiment of the present invention.

[0024] FIG. 9 is a perspective view of a processing and analyzing instrument in accordance with an embodiment of the present invention.

[0025] FIG. 10 is a cross-sectional view of a valve of a transfer cartridge in accordance with an embodiment of the present invention, with the valve in a closed position.

[0026] FIG. 11 is a cross-sectional view of a valve of a transfer cartridge in accordance with an embodiment of the present invention, with the valve in an open position.

[0027] Corresponding reference characters indicate corresponding parts throughout the several views. The exemplifications set out herein illustrate exemplary embodiments of the disclosure, and such exemplifications are not to be construed as limiting the scope of the disclosure in any manner.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following description is provided to enable those skilled in the art to make and use the described embodiments contemplated for carrying out the invention. Various modifications, equivalents, variations, and alternatives, however, will remain readily apparent to those skilled in the art. Any and all such modifications, variations, equivalents, and alternatives are intended to fall within the spirit and scope of the present invention.

[0029] For purposes of the description hereinafter, the terms upper, lower, right, left, vertical, horizontal, top, bottom, lateral, longitudinal, and derivatives thereof shall relate to the invention as it is oriented in the drawing figures. However, it is to be understood that the invention may assume alternative variations and step sequences, except where expressly specified to the contrary. It is also to be understood that the specific devices and processes illustrated in the attached drawings, and described in the following specification, are simply exemplary embodiments of the invention. Hence, specific dimensions and other physical characteristics related to the embodiments disclosed herein are not to be considered as limiting.

[0030] Various point-of-care testing devices are known in the art. Such point-of-care testing devices include test strips, glass slides, diagnostic cartridges, or other testing devices for testing and analysis. Test strips, glass slides, and diagnostic cartridges are point-of-care testing devices that receive a blood sample and test that blood for one or more physiological and biochemical states. There are many point-of-care devices that use cartridge based architecture to analyze very small amounts of blood bedside without the need to send the sample to a lab for analysis. This saves time in getting results over the long run but creates a different set of challenges versus the highly routine lab environment. Examples of such testing cartridges include the i-STAT? testing cartridge from the Abbot group of companies. Testing cartridges such as the i-STAT? cartridges may be used to test for a variety of conditions including the presence of chemicals and electrolytes, hematology, blood gas concentrations, coagulation, or cardiac markers. The results of tests using such cartridges are quickly provided to the clinician.

[0031] However, the samples provided to such point-of-care testing cartridges are currently manually collected with an open system and transferred to the point-of-care testing cartridge in a manual manner that often leads to inconsistent results, thereby negating the advantage of the point-of-care testing device. Accordingly, a need exists for a system for collecting and transferring a sample to a point-of-care testing device that provides safer, reproducible, and more accurate results. Accordingly, a point-of-care collecting and transferring system of the present disclosure will be described hereinafter. A system of the present disclosure enhances the reliability of the point-of-care testing device by: 1) incorporating a more closed type of sampling and transfer system; 2) minimizing open exposure of the sample; 3) improving sample quality; and 4) improving the overall ease of use.

[0032] FIGS. 1-9 illustrate an exemplary embodiment of the present disclosure. Referring to FIGS. 1-9, a biological fluid collection device, such as a blood collection device 10, of the present disclosure is adapted to receive a multi-component blood sample 12 having a cellular portion 14 and a plasma portion 16.

[0033] FIG. 7 illustrates an exemplary embodiment of the present disclosure. Referring to FIG. 7, a biological fluid separation and testing system, such as a blood separation and testing system 20, of the present disclosure includes a blood collection device 10 and a biological fluid separation and testing device, such as a blood separation and testing device, or point-of-care testing device 22 engageable with the blood collection device 10 for closed transfer of a blood sample 12 from the blood collection device 10 to the blood separation and testing device 22. After transferring the blood sample 12, the blood separation and testing device 22 is able to separate the plasma portion 16 from the cellular portion 14 of the multi-component blood sample and analyze the blood sample and obtain test results.

[0034] Referring to FIGS. 1-6, the blood collection device 10 includes a lancet housing 26 and a transfer cartridge 28 that is removably engageable with a portion of the lancet housing 26. The lancet housing 26 generally includes a top portion 30, a bottom portion 31, a central aperture or interior 32, an inlet port 34, a first flow channel 36, a second flow channel 38, a reservoir region 40, a truncated region 42, a puncturing element engagement portion 44, an adhesive 46 on the bottom portion 31 of the lancet housing 26, and a transfer cartridge receiving cavity 48. The inlet port 34 and the first flow channel 36 are adapted to receive a blood sample therein.

[0035] In one embodiment, the lancet housing 26 includes a diverted and vented chamber or reservoir region 40 that pulls off a first drop of blood. In one embodiment, the reservoir region 40 includes a vent or a vent hole. In another embodiment, the reservoir region 40 could contain a small sponge or a wicking material that assists in drawing a first drop of blood. In yet another embodiment, the reservoir region 40 could include a passive valve design. For example, the reservoir region 40 could include structure that would fill the reservoir region 40 first and only once the reservoir region 40 is sufficiently filled would a barrier, such as a capillary break, be overcome thereby allowing a blood sample to flow to the transfer cartridge 28. In other embodiments, the blood collection device 10 could include any mechanism that is adapted to pull a first drop of blood into the reservoir region 40 without the first drop of blood flowing to the transfer cartridge 28.

[0036] In one embodiment, the lancet housing 26 includes the first flow channel 36 that is in fluid communication with the inlet port 34 and the second flow channel 38 is in fluid communication with the first flow channel 36. In one embodiment, at least a portion of the second flow channel 38 is diverted from the first flow channel 36. In one embodiment, at least one of the first flow channel 36 and the second flow channel 38 includes a vent to atmosphere.

[0037] Referring to FIG. 3, in one embodiment, the first flow channel 36 of the lancet housing 26 includes a reservoir region 40 that is spaced apart from the inlet port 34 and a truncated region 42 that is spaced apart from the reservoir region 40. In one embodiment, the second flow channel 38 of the lancet housing 26 is provided in fluid communication with the truncated region 42.

[0038] Referring to FIGS. 1-6, the blood collection device 10 also includes a puncturing element structure 70 that may be secured within the central aperture or interior 32 of the lancet housing 26. The puncturing element structure 70 generally includes a first end 72, a second end 74, a push button 76 adjacent the first end 72, a puncturing element 78 adjacent the second end 74, and a housing engagement portion 80. The housing engagement portion 80 engages the puncturing element engagement portion 44 of the lancet housing 26 for securing the puncturing element structure 70 to the lancet housing 26 within the central aperture 32 as shown in FIG. 5. The puncturing element structure 70 includes a puncturing element 78 having a puncturing end 82. The puncturing end 82 is adapted for puncturing the skin surface S of a patient (FIG. 4), and may define a pointed end, a blade edge, or a similar cutting mechanism. The puncturing end 82 may include a preferred alignment orientation, such as with a pointed end of a blade aligned in a specific orientation. In one embodiment, the puncturing element 78 comprises a micro-needle array.

[0039] The puncturing element 78 is adapted for movement between a pre-actuated position wherein the puncturing element 78 including the puncturing end 82 is retained within the interior 32 of the lancet housing 26 and a puncturing position wherein the puncturing end 82 of the puncturing element 78 extends through the inlet port 34 of the lancet housing 26 to puncture a skin surface S of a patient to draw a blood sample 12. In one embodiment, actuation of the push button 76 moves the puncturing element 78 from the pre-actuated position to the puncturing position.

[0040] In one embodiment, the lancet housing 26 of the blood collection device 10 may include a self-sealing dock that would allow an external lancet or puncturing element to be removably received within the lancet housing 26. The external lancet or puncturing element could be either pre-integrated into the packaged blood collection device 10 or introduced separately by a user before using the blood collection device 10 of the present disclosure.

[0041] Referring to FIGS. 1-4, the bottom portion 31 of the lancet housing 26 includes an adhesive or adhesive layer 46 so that the blood collection device 10 can be secured onto a skin surface S of a patient where a blood sample will be accessed. In one embodiment, the adhesive 46 of the bottom portion 31 is protected by a peel-off layer, similar to an adhesive bandage, which would be removed before placing the blood collection device 10 on the skin surface S of the patient's body. A hydrogel or other layer could be included to provide some thickness to the bottom portion 31 and help improve the stability of the adhesive seal. Additionally, in one embodiment, the adhesive 46 could include a chemistry to create a more liquid-tight seal, similar to painter's tape technology, where wetting from the paint itself causes a chemical reaction with the adhesive 46 to create a more water-tight barrier to prevent the paint from seeping under the tape. Importantly, the adhesive provides for proper adhesion of the lancet housing 26 to the skin surface S of a patient and minimizes skin contact which leads to a better sample for coagulation testing. The adhesive 46 of the lancet housing 26 can be punctured by the puncturing element 78 such that the blood evolving from the wound beneath passes through the cut into the lancet housing 26 to be collected inside the blood collection device 10.

[0042] Referring to FIGS. 1-11, the transfer cartridge 28 includes a first wall portion 50, a second wall portion 52, a transfer port 54, a reservoir 68, and a valve or septum 86 at the transfer port 54. In one embodiment, an internal fill volume of the reservoir 68 of the transfer cartridge 28 corresponds to a volume of fluid required to perform a diagnostic test.

[0043] The transfer port 54 of the transfer cartridge 28 may include a valve or septum 86 that is transitionable between a closed position and an open position. With the valve 86 in an open position, the blood sample 12 may flow through the reservoir 68 of the transfer cartridge 28 to a blood separation and testing device 22 as described in more detail below.

[0044] Referring to FIG. 2, a portion of the transfer cartridge 28 can be received within the transfer cartridge receiving cavity 48 of the lancet housing 26. In this initial position, the second flow channel 38 of the lancet housing 26 is in fluid communication with the reservoir 68 of the transfer cartridge 28 so that a collected blood sample 12 can flow through the inlet port 34 of the lancet housing 26 to the reservoir 68 of the transfer cartridge 28. When the reservoir 68 of the transfer cartridge 28 is filled with a blood sample 12, the clinician or patient can remove the transfer cartridge 28 from the lancet housing 26 as shown in FIG. 1. When removed, the reservoir 68 of the transfer cartridge 28 and all flow channels of the lancet housing 26 are sealed from the external environment.

[0045] In one embodiment, with the transfer cartridge 28 received within the transfer cartridge receiving cavity 48 of the lancet housing 26, the first wall portion 50 is received within the transfer cartridge receiving cavity 48 and the second wall portion 52 of the transfer cartridge 28 extends outward from the transfer cartridge receiving cavity 48. In this manner, the second wall portion 52 of the transfer cartridge 28 can be grasped by a user to remove the transfer cartridge 28 from the lancet housing 26.

[0046] The blood collection device 10 may also include a layer of sample stabilizer. For example, in one embodiment, a blood sample 12 that is collected within the blood collection device 10 may be exposed to and mixed with a sample stabilizer in a portion of the lancet housing 26 or the transfer cartridge 28. The sample stabilizer can be an anticoagulant, or a substance designed to preserve a specific element within the blood such as, for example, RNA, protein analyte, or other element. In one embodiment, the sample stabilizer may be disposed in a portion of the lancet housing 26. In another embodiment, the sample stabilizer may be disposed in a portion of the transfer cartridge 28 or any other area of the blood collection device 10 in which it contacts a blood sample.

[0047] Referring to FIGS. 7 and 8, a blood separation and testing device or point-of-care testing device 22 includes a rotatable body 100 having a center of rotation 102 and an outer periphery 104, a body inlet or receiving port 106, a separation chamber 108, a flow channel 110, a blood component chamber, such as a plasma chamber 112, and a diagnostic portion or diagnostic chamber 114 in fluid communication with the plasma chamber 112. In one embodiment, the diagnostic chamber includes a detection zone 116 that is readable by a processing and analyzing instrument 200 (FIG. 9). In one embodiment, the rotatable body 100 is disc-shaped.

[0048] The receiving port or body inlet 106 is adapted to receive the valve 86 of the transfer port 54 of the transfer cartridge 28. The blood separation and testing device 22 is adapted to receive the valve 86 of the transfer port 54 of the transfer cartridge 28 for closed transfer of a portion of the blood sample 12 from the reservoir 68 of the transfer cartridge 28 to the blood separation and testing device 22. The blood separation and testing device 22 is able to separate the plasma portion 16 from the cellular portion 14 and analyze the blood sample 12 and obtain test results.

[0049] The separation chamber 108 is defined within the rotatable body 100 and is in fluid communication with the body inlet 106 and the separation chamber 108 includes a chamber outlet or flow channel 110 spaced apart from the body inlet 106. The separation chamber 108 is adapted to receive both the cellular portion 14 and the plasma portion 16 therein.

[0050] The blood component chamber, such as the plasma chamber 112, is defined within the rotatable body 100 and is in fluid communication with the separation chamber 108 via the flow channel or chamber outlet 110. When a rotational force is applied to the rotatable body 100, the plasma portion 16 passes from the separation chamber 108 into the plasma chamber 112 and the cellular portion 14 is retained within the separation chamber 108. In one embodiment, the plasma chamber 112 receives the plasma portion 16 of the blood sample 12 upon the rotatable body 100 being rotated by a processing and analyzing instrument 200. In one embodiment, the plasma chamber 112 is disposed adjacent the center of rotation 102 and the separation chamber 108 is disposed adjacent the outer periphery 104 of the rotatable body 100.

[0051] Once a blood sample 12 is received into the blood separation and testing device 22, the blood separation and testing device 22 may be inserted into a processing and analyzing instrument 200 that processes and analyzes the blood sample 12. First, the blood separation and testing device 22 is spun at a high rate and the plasma portion 16 is separated from the cellular portion 14 in the separation chamber 108. Then, the speed is slowed down to drive the plasma portion 16 to the plasma chamber 112 in a central portion of the blood separation and testing device 22. The plasma portion 16 can then be processed inline through the diagnostic portion 114 of the blood separation and testing device 22. Since the blood separation and testing device 22 may be of a compact disc format, the detection zone 116 is read by the internal laser of the processing and analyzing instrument 200 while it is still spinning or running.

[0052] Referring to FIG. 7, a blood separation and testing device 22 includes a receiving port or body inlet 106 adapted to receive the transfer port 54 of the transfer cartridge 28. The blood separation and testing device 22 is adapted to receive the transfer port 54 of the transfer cartridge 28 for closed transfer of a portion of the blood sample 12 from the reservoir 68 of the transfer cartridge 28 to the blood separation and testing device 22. The blood separation and testing device 22 is able to separate the plasma portion 16 from the cellular portion 14 and analyze the blood sample 12 and obtain test results.

[0053] As discussed above, the transfer port 54 of the transfer cartridge 28 may include a valve or septum 86 that is transitionable between a closed position and an open position. With the valve or septum 86 in an open position (FIG. 11), the blood sample 12 may flow through the transfer port 54 to the body inlet 106 of the blood separation and testing device 22.

[0054] In one embodiment, referring to FIGS. 10 and 11, the valve 86 may generally include a transfer channel 90, a bellows or deformable wall member 92, and a septum or barrier 94 having a first barrier wall 96 and a second barrier wall 98. Referring to FIG. 10, the valve 86 is in a closed position to prevent the blood sample 12 from flowing through the transfer port 54. In this manner, the blood sample 12 is sealed within the transfer cartridge 28. Referring to FIG. 11, the valve 86 is in an open position so that the blood sample 12 may flow through the transfer port 54 to a blood separation and testing device 22.

[0055] Referring to FIG. 11, with the blood sample 12 received within the transfer port 54 of the transfer cartridge 28, the transfer port 54 of the transfer cartridge 28 is then positioned over the receiving port or body inlet 106 of the blood separation and testing device 22. Pushing down in the direction of arrow B compresses the deformable wall member 92 and opens up the first barrier wall 96 and the second barrier wall 98 of the septum 94 as shown in FIG. 11. With the valve 86 in the open position, the blood sample 12 is allowed to flow through the transfer port 54 and to the blood separation and testing device 22 in a closed manner reducing exposure to the clinician and the patient.

[0056] The valve 86 of the transfer cartridge 28 only opens when the transfer port 54 is pressed upon the receiving port 106 of the blood separation and testing device 22. This releases the blood sample 12 directly into the receiving port 106 of the blood separation and testing device 22, thus mitigating unnecessary exposure to the patient's blood.

[0057] In one embodiment, a portion of the rotatable body 100 of the blood separation and testing device 22 is threadably engageable with a portion of the transfer cartridge 28 for aligning the body inlet 106 in fluid communication with the reservoir 68 of the transfer cartridge 28.

[0058] Referring to FIGS. 1-11, use of a blood collection device of the present disclosure will now be described. Referring to FIG. 4, upon selecting a site, a clinician can adhere the adhesive 46 on the bottom portion 31 of the lancet housing 26 onto a skin surface S of a patient where a blood sample will be accessed over a selected sampling site.

[0059] Next, the push button 76 on the blood collection device 10 is depressed or actuated to move the puncturing element 78 from the pre-actuated position to the puncturing position so that the puncturing element 78 punctures the skin surface S of a patient. Thereafter, referring to FIG. 6, the blood collection device 10 is rolled back to collect a blood sample 12 into the reservoir 68 of the transfer cartridge 28 via the inlet port 34 of the lancet housing 26. In one embodiment, the blood sample 12 is exposed to and mixed with a sample stabilizer in a portion of the lancet housing 26 or the transfer cartridge 28. The sample stabilizer can be an anticoagulant, or a substance designed to preserve a specific element within the blood such as, for example, RNA, protein analyte, or other element.

[0060] When the reservoir 68 of the transfer cartridge 28 is filled, the clinician or patient can remove the transfer cartridge 28 from the lancet housing 26 as shown in FIG. 1. When removed, the reservoir 68 of the transfer cartridge 28 and all flow channels of the lancet housing 26 are sealed from the external environment.

[0061] Referring to FIG. 7, the next step of the process involves insertion of the transfer cartridge 28 into a blood separation and testing device 22 to transfer a blood sample from the transfer cartridge 28 to the blood separation and testing device 22. In one embodiment, the blood separation and testing device 22 may be a compact disc separation and testing system that is utilized as a point-of-care testing device.

[0062] Referring to FIGS. 7 and 11, the transfer port 54 of the transfer cartridge 28 is positioned over the receiving port or body inlet 106 of the blood separation and testing device 22. Pushing down in the direction of arrow B compresses the deformable wall member 92 and opens up the first barrier wall 96 and the second barrier wall 98 of the septum 94 as shown in FIG. 11. With the valve 86 in the open position, the blood sample 12 is allowed to flow through the transfer port 54 and to the blood separation and testing device 22 in a closed manner reducing exposure to the clinician and the patient. The valve 86 of the transfer cartridge 28 only opens when the transfer port 54 is pressed upon the receiving port 106 of the blood separation and testing device 22. This releases the blood sample 12 directly into the receiving port 106 of the blood separation and testing device 22, thus mitigating unnecessary exposure to the patient's blood.

[0063] Once a blood sample 12 is received into the blood separation and testing device 22, the blood separation and testing device 22 may be inserted into a processing and analyzing instrument 200 that processes and analyzes the blood sample 12. First, the blood separation and testing device 22 is spun at a high rate and the plasma portion 16 is separated from the cellular portion 14 in the separation chamber 108. Then, the speed is slowed down to drive the plasma portion 16 to the plasma chamber 112 in a central portion of the blood separation and testing device 22. The plasma portion 16 can then be processed inline through the diagnostic portion 114 of the blood separation and testing device 22. Since the blood separation and testing device 22 may be of a compact disc format, the detection zone 116 is read by the internal laser of the processing and analyzing instrument 200 while it is still spinning or running.

[0064] While this disclosure has been described as having exemplary designs, the present disclosure can be further modified within the spirit and scope of this disclosure. This application is therefore intended to cover any variations, uses, or adaptations of the disclosure using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this disclosure pertains and which fall within the limits of the appended claims.