Devices and techniques associated with diagnostics, therapies, and other applications, including skin-associated applications
First Claim
1. A device for withdrawing blood from the skin and/or from beneath the skin of a subject, the device comprising:
- a recess;
a vacuum chamber separate from the recess having an internal pressure less than atmospheric pressure before blood is withdrawn into the device and before the device is applied to the skin of the subject;
a storage chamber, separate from the vacuum chamber and the recess, for receiving blood withdrawn into the recess when a negative pressure is applied to the skin of the subject; and
a sensor for determining a condition of the blood withdrawn into the device.
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Accused Products
Abstract
The present invention generally relates to devices and techniques associated with diagnostics, therapies, and other applications, including skin-associated applications, for example, devices for delivering and/or withdrawing fluid from subjects, e.g., through the skin. In some embodiments, the device includes a system for accessing an extractable medium from and/or through the skin of the subject at an access site, and a pressure regulator supported by a support structure, able to create a pressure differential across the skin at at least a portion of the access site. The device may also include, in some cases, a sensor supported by the support structure for determining at least one condition of the extractable medium from the subject, and optionally a signal generator supported by the support structure for generating a signal relating to the condition of the medium determined by the sensor.
588 Citations
16 Claims
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1. A device for withdrawing blood from the skin and/or from beneath the skin of a subject, the device comprising:
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a recess; a vacuum chamber separate from the recess having an internal pressure less than atmospheric pressure before blood is withdrawn into the device and before the device is applied to the skin of the subject; a storage chamber, separate from the vacuum chamber and the recess, for receiving blood withdrawn into the recess when a negative pressure is applied to the skin of the subject; and a sensor for determining a condition of the blood withdrawn into the device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A device for withdrawing blood from the skin and/or from beneath the skin of a subject, the device comprising:
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a vacuum chamber having an internal pressure less than atmospheric pressure before blood is withdrawn into the device and before the device is applied to the skin of the subject; a storage chamber, separate from the vacuum chamber; a microfluidic channel, discrete from the vacuum chamber and the storage chamber and having a smaller cross-sectional area than the cross-sectional area of the storage chamber; a support structure constructed and arranged to be positioned proximate the skin of the subject; a plurality of microneedles, associated with the support structure, for accessing blood from and/or through the skin of the subject; and a sensor for determining a condition of the blood withdrawn into the device, wherein the vacuum chamber is in fluid communication with the storage chamber via the microfluidic channel, and wherein the support structure is constructed and arranged to move the plurality of microneedles into contact with the skin, and to withdrawal the plurality of microneedles from the skin after contact with the skin. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification