Dermal patch system
A system for collecting a physiological sample includes a dermal patch configured for attaching to a subject's skin and an applicator for coupling to the dermal patch. The dermal patch includes a reservoir configured to store a processing fluid, a sample collection chamber for receiving the processing fluid and a physiological sample extracted from a subject. The applicator includes at least one actuating lever for activating the dermal patch to receive the physiological sample from the subject and directing the physiological sample into the sample collection chamber.
1. A dermal patch system for collecting a physiological sample from a subject comprising:
a housing that includes:
a needle configured to move between an undeployed position and a deployed position, wherein the needle is configured to draw a physiological sample from the subject in the deployed position,
a reservoir that stores a processing fluid,
a chamber configured to receive the processing fluid and the drawn physiological sample, and
a lever configured to move between an undeployed position and a deployed position such that a transition of the lever from the undeployed position to the deployed position releases the processing fluid from the reservoir and moves the needle to the deployed position.
2. The system of claim 1 , wherein the transition of the lever from the undeployed position to the deployed position draws the released processing fluid and the drawn physiological sample to the chamber.
3. The system of claim 1 , wherein the needle and the lever are separable.
4. The system of claim 1 , wherein the physiological sample comprises any of blood and interstitial fluid.
5. The system of claim 1 , wherein the processing fluid includes a reagent or a buffer.
6. The system of claim 1 , wherein the processing fluid includes an anti-coagulant.
7. The system of claim 1 , wherein the processing fluid includes heparin or a protease inhibitor.
8. The system of claim 1 , further comprising a storage element in fluid communication with the sample collection chamber and configured to store the physiological sample received in the sample collection chamber.
9. The system of claim 8 , wherein the storage element includes a filter paper matrix.
10. The system of claim 1 , comprising an adhesive layer configured for attaching the dermal patch to the subject's skin.
11. The system of claim 2 , further comprising:
a first fluidic channel configured to carry the processing fluid to the chamber.
12. The system of claim 11 , further comprising:
a second fluidic channel configured to carry the drawn physiological sample to the chamber.
13. The system of claim 12 , wherein the transition of the lever from the undeployed position to the deployed position creates a vacuum within the first fluidic channel and the second fluidic channel that draws the processing fluid and the drawn physiological sample to the chamber.
14. The system of claim 13 , further comprising:
a pump configured to create the vacuum.
15. The system of claim 14 , wherein the pump includes a plunger and the lever is configured to move the plunger to create the vacuum when the lever is moved from the undeployed position to the deployed position.
16. The system of claim 15 , further comprising:
a release element configured to release the processing fluid from the reservoir when the lever is moved from the undeployed position to the deployed position.
17. The system of claim 16 , wherein the reservoir comprises a frangible member and the release element is configured to rupture the frangible membrane to release the processing fluid stored therein.
18. A system for collecting a physiological sample, comprising:
a dermal patch configured to attach to the skin of the subject, and including:
a needle configured to move between an undeployed position and a deployed position, wherein the needle is configured to draw a physiological sample from the subject in the deployed position, and
a storage element configured to absorb the drawn physiological sample, and
an applicator configured to removably couple to the dermal patch, and including:
a lever configured to move between an undeployed position and a deployed position such that a transition of the lever from the undeployed position to the deployed position causes the needle to move to the deployed position to draw the physiological sample and facilitate delivery of the drawn physiological sample to the storage element.
19. The system of claim 18 , wherein said storage element includes a filter paper matrix.
20. The system of claim 18 , further comprising a sample collection chamber that retains the storage element.
21. The system of claim 20 , further comprising a physiological fluid channel configured to carry the physiological sample to the sample collection chamber.