Automated blood sampling device
First Claim
1. A system comprising:
- a needle;
a chamber, wherein the needle is disposed at least partially within the chamber;
a propellant disposed within the chamber;
a piston disposed within the chamber, wherein the needle is coupled to the piston, wherein the piston is configured to slidably move within the chamber, wherein the propellant is ignitable to slidably move the piston within the chamber to drive the needle into skin to form a puncture in the skin, wherein the piston includes a vent, wherein the vent is configured to allow gases produced by ignition of the propellant to vent through the piston.
3 Assignments
0 Petitions
Accused Products
Abstract
Devices are provided to automatically access blood from beneath or within skin. These devices include an injector configured to drive a needle into the skin and subsequently to retract the needle from the skin. These devices additionally include a seal to which suction is applied. To drive the needle into the skin, the needle is first driven through the seal, creating at least one hole in the seal. The suction applied to the seal acts to draw blood from the puncture formed in the skin by the needle, through the at least one hole in the seal, and to a sensor, blood storage element, or other payload. These devices can be wearable and configured to automatically access blood from skin, for example, to access blood from the skin at one or more points in time while a wearer of a device is sleeping.
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Citations
20 Claims
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1. A system comprising:
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a needle; a chamber, wherein the needle is disposed at least partially within the chamber; a propellant disposed within the chamber; a piston disposed within the chamber, wherein the needle is coupled to the piston, wherein the piston is configured to slidably move within the chamber, wherein the propellant is ignitable to slidably move the piston within the chamber to drive the needle into skin to form a puncture in the skin, wherein the piston includes a vent, wherein the vent is configured to allow gases produced by ignition of the propellant to vent through the piston. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method comprising:
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mounting a system to skin, wherein the system comprises; a needle; a chamber, wherein the needle is disposed at least partially within the chamber; a propellant disposed within the chamber; a piston disposed within the chamber, wherein the needle is coupled to the piston, wherein the piston is configured to slidably move within the chamber, wherein the piston includes a vent configured to allow gases produced by ignition of the propellant to vent through the piston; and igniting the propellant to slidably move the piston within the chamber to drive the needle into skin to form a puncture in the skin. - View Dependent Claims (18, 19, 20)
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Specification