Method and apparatus for penetrating tissue
First Claim
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1. A skin penetrating system, comprising:
- a housing member;
an electronic drive force generator;
a plurality of penetrating members positioned in the housing member, each of a penetrating member being couplable to the drive force generator;
a plurality of sample chambers, each sample chamber including electrodes, having a volume no greater than 1 μ
L and an analyte sensor, each of a sample chamber being positioned to receive fluid from a wound created by a penetrating member, and determine a concentration of an analyte in a fluid using a sample of less than 1 μ
L of the fluid, wherein when the penetrating member is removed from the sample chamber, the electrodes remain in the sample chamber and the volume of the sample chamber is less than 1 μ
L wherein a tip of the penetrating member is configured to extend through an opening of a sample chamber, wherein each penetrating member of the plurality of penetrating members has a packing density of no more than 1.0 cm3/penetrating member;
a single substrate that supports the plurality of penetrating members and the plurality of sample chambers, the single substrate being rotatably positioned in the housing to position each of a penetrating member in a launch position to penetrate a tissue site, and then rotate to a next position for a launch position of a next penetrating member; and
a programmable processor operatively programmed with software that has control instructions for controlling the drive force generator, to keep a wound tract created by a penetrating member open for a sufficient time to provide for spontaneous flow of blood for sample capture into an associated sample chamber, the control instructions selected from at least one of, penetration depth of a penetrating member, velocity of a penetrating member, velocity of a penetrating member in or out of target tissue and a dwell time of a penetrating member in the target tissue.
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Abstract
A skin penetrating system includes a housing member and a penetrating member positioned in the housing member. An analyte detecting member is coupled to a sample chamber. The analyte detecting member is configured to determine a concentration of an analyte in a body fluid using a sample of less than 1 μL of a body fluid disposed in the sample chamber. A tip of the penetrating member is configured to extend through an opening of the sample chamber.
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Citations
14 Claims
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1. A skin penetrating system, comprising:
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a housing member; an electronic drive force generator; a plurality of penetrating members positioned in the housing member, each of a penetrating member being couplable to the drive force generator; a plurality of sample chambers, each sample chamber including electrodes, having a volume no greater than 1 μ
L and an analyte sensor, each of a sample chamber being positioned to receive fluid from a wound created by a penetrating member, and determine a concentration of an analyte in a fluid using a sample of less than 1 μ
L of the fluid, wherein when the penetrating member is removed from the sample chamber, the electrodes remain in the sample chamber and the volume of the sample chamber is less than 1 μ
L wherein a tip of the penetrating member is configured to extend through an opening of a sample chamber, wherein each penetrating member of the plurality of penetrating members has a packing density of no more than 1.0 cm3/penetrating member;a single substrate that supports the plurality of penetrating members and the plurality of sample chambers, the single substrate being rotatably positioned in the housing to position each of a penetrating member in a launch position to penetrate a tissue site, and then rotate to a next position for a launch position of a next penetrating member; and a programmable processor operatively programmed with software that has control instructions for controlling the drive force generator, to keep a wound tract created by a penetrating member open for a sufficient time to provide for spontaneous flow of blood for sample capture into an associated sample chamber, the control instructions selected from at least one of, penetration depth of a penetrating member, velocity of a penetrating member, velocity of a penetrating member in or out of target tissue and a dwell time of a penetrating member in the target tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification