Systems and interfaces for blood sampling
The present invention generally relates to systems and methods for delivering and/or receiving a substance or substances such as blood from subjects. In one aspect, the present invention is directed to devices and methods for receiving or extracting blood from a subject, e.g., from the skin and/or from beneath the skin, using devices containing a substance transfer component (for example, one or more needles or microneedles) and a reduced pressure or vacuum chamber having an internal pressure less than atmospheric pressure prior to receiving blood. In some embodiments, the device may contain a “snap dome” or other deformable structure, which may be used, at least in part, to urge or move needles or other suitable substance transfer components into the skin of a subject. In some cases, for example, the device may contain a flexible concave member and a needle mechanically coupled to the flexible concave member such that the needle may be urged or moved into the skin using the flexible concave member. Other aspects of the present invention are directed at other devices for receiving blood (or other bodily fluids, e.g., interstitial fluid), kits involving such devices, methods of making such devices, methods of using such devices, and the like.
1. A device for receiving blood from a subject, the device comprising:
a surface configured to be positioned against skin of a subject;
a device actuator;
at least one cutter, wherein the at least one cutter is configured to move from a first position to a second position in response to actuation of the device actuator to cause blood to be drawn from a subject;
an opening configured to receive fluid into the device, the opening being part of a first portion of the device;
a collection chamber moveable relative to the opening, wherein when the collection chamber is coupled to the first portion of the device, the collection chamber extends in a direction parallel to the surface; and
a vacuum source, wherein vacuum from the vacuum source is mechanically created.
2. The device of claim 1 , further comprising a spring configured to move the at least one cutter away from the second position.
3. The device of claim 1 , wherein the at least one cutter comprises at least one needle.
4. The device of claim 1 , wherein the at least one cutter comprises at least one microneedle.
5. The device of claim 1 , wherein the at least one cutter comprises at least one blade.
6. The device of claim 1 , further comprising a channel configured to guide fluid from the opening.
7. The device of claim 1 , wherein the collection chamber is removeably coupleable to the device.
8. The device of claim 1 , wherein the vacuum source comprises a deformable structure, and wherein vacuum from the vacuum source is mechanically created through a change in shape of a portion of the deformable structure.
9. The device of claim 1 , wherein the vacuum source comprises a piston.
10. A device for receiving blood from a subject, the device comprising:
a surface configured to be positioned against skin of a subject;
a device actuator;
at least one cutter, wherein the at least one cutter is moveable from a first position to a second position to cause blood to be drawn from a subject;
an opening configured to receive fluid into the device, the opening being part of a first portion of the device;
a collection chamber moveable relative to the opening, wherein when the collection chamber is coupled to the first portion of the device, the collection chamber extends in a direction parallel to the surface; and
a flexible concave member, wherein the flexible concave member is moveable from a first configuration to a second configuration upon actuation of the device actuator.
11. The device of claim 10 , further comprising a spring positioned beneath the flexible concave member, wherein when the flexible concave member is moved from the first configuration toward the second configuration, the spring compresses.
12. The device of claim 10 , wherein the at least one cutter is positioned under the flexible concave member.
13. The device of claim 10 , wherein the first configuration comprises a dome shape, and the second configuration comprises a deformed shape.
14. The device of claim 10 , further comprising a spring configured to move the at least one cutter away from the second position.
15. The device of claim 10 , wherein the at least one cutter comprises at least one needle.
16. The device of claim 10 , wherein the at least one cutter comprises at least one microneedle.
17. The device of claim 10 , wherein the at least one cutter comprises at least one blade.
18. The device of claim 10 , wherein the collection chamber is removeably coupleable to the device.
19. A device for receiving blood from a subject, the device comprising:
a device actuator;
at least one cutter, wherein the at least one cutter is configured to move from a first position to a second position in response to actuation of the device actuator to cause blood to be drawn from a subject;
an opening configured to receive fluid into the device, wherein the opening lies in a two-dimensional plane, and wherein the opening is part of a first portion of the device;
a collection chamber moveable relative to the opening, wherein when the collection chamber is coupled to the first portion of the device, the collection chamber extends in a direction parallel to the two-dimensional plane; and
a vacuum source, wherein vacuum from the vacuum source is mechanically created.
20. The device of claim 19 , further comprising a spring configured to move the at least one cutter away from the second position.
21. The device of claim 19 , wherein the at least one cutter comprises at least one needle, at least one microneedle, or at least one blade.
22. The device of claim 19 , wherein the collection chamber is removeably coupleable to the device.
23. The device of claim 19 , wherein the vacuum source comprises a deformable structure, and wherein vacuum from the vacuum source is mechanically created through a change in shape of a portion of the deformable structure.
24. The device of claim 19 , wherein the vacuum source comprises a piston.