Method and apparatus for improving fluidic flow and sample capture
First Claim
1. A body fluid sampling device for use on a patient, comprising:
- a cartridge;
at least one penetrating member positioned in the cartridge;
a controllable penetrating member driver configured to be coupled to the at least one penetrating member;
a processor coupled to the controllable penetrating member and providing a controllable velocity of the at least one penetrating member;
a sample port for receiving a body fluid in response to a puncturing event by the at least one penetrating member;
a sample chamber;
a channel coupled to the sample port and the sample chamber, at least a portion of the channel being a capillary channel with a hydrophilic surface positioned adjacent to the sample chamber;
at least one electrode positioned in the sample chamber and configured to determine an amount of an analyte in the body fluid; and
a mesh membrane positioned in the channel and at the sample port or adjacent to the sample port to guide a flow of the body fluid through at least a portion of the capillary channel with the mesh providing that the body fluid contacts the channel regardless of an orientation of body fluid sampling device, the mesh membrane and channel configured to provide a transport of the body fluid to the sample chamber and a measurement in less than 10 seconds.
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Accused Products
Abstract
A system and method is provided for the capture of bodily fluid upon lancing of a patient. In one embodiment, the fluid sample capture aperture mesh (320) ring is placed in the pathway of a finger penetrating member (340). The aperture mesh ring has a center clearance area that allows the penetrating member to pierce the skin unobstructed. The aperture mesh ring may contain a series of fluid sampling meshes as to allow the release bodily fluid to “wick” into the fluid sampling meshes for transport to the respective sensor. The invention may also relate to a method of improving the fluidic flow through a membrane mesh structure for the transportation of bodily fluids from a point of sampling to a point of measurement.
2955 Citations
22 Claims
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1. A body fluid sampling device for use on a patient, comprising:
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a cartridge; at least one penetrating member positioned in the cartridge; a controllable penetrating member driver configured to be coupled to the at least one penetrating member; a processor coupled to the controllable penetrating member and providing a controllable velocity of the at least one penetrating member; a sample port for receiving a body fluid in response to a puncturing event by the at least one penetrating member; a sample chamber; a channel coupled to the sample port and the sample chamber, at least a portion of the channel being a capillary channel with a hydrophilic surface positioned adjacent to the sample chamber; at least one electrode positioned in the sample chamber and configured to determine an amount of an analyte in the body fluid; and a mesh membrane positioned in the channel and at the sample port or adjacent to the sample port to guide a flow of the body fluid through at least a portion of the capillary channel with the mesh providing that the body fluid contacts the channel regardless of an orientation of body fluid sampling device, the mesh membrane and channel configured to provide a transport of the body fluid to the sample chamber and a measurement in less than 10 seconds. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of sampling a body fluid, comprising:
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providing a fluid sampling device that includes a cartridge, at least one penetrating member positioned in the cartridge, a controllable penetrating driver, a processor, a sample port, a sample chamber coupled to a channel coupled to the sample port, at least a portion of the channel having a hydrophilic surface, at least a portion of the channel being a capillary channel positioned adjacent to the sample chamber, at least one electrode positioned in the sample chamber, and configured to determine an amount of an analyte in the body fluid and a mesh membrane positioned in the channel; using the processor to provide a controllable velocity of the at least one penetrating member; receiving a body fluid at the sample port in response to a puncturing event by the at least one penetrating member; and using the mesh membrane to guide a flow of the body fluid through at least a portion of the capillary channel, with the mesh membrane and channel configured to provide a transport of the body fluid to the sample chamber in less than 10 seconds, wherein the mesh provides that the body fluid contacts the channel regardless of an orientation of body fluid sampling device. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification