Method and apparatus for body fluid sampling and analyte sensing
First Claim
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1. A method of controlling a penetrating member at a tissue site for receiving a body fluid from a wound created at the tissue site, the method comprising:
- (a) providing a lancing device that includes a penetrating member driver coupled to a position sensor and a processor, the position sensor and processor determining a relative position and velocity of the penetrating member based on measuring relative position of the penetrating member with respect to time;
(b) launching the penetrating member from the lancing device;
(c) measuring relative position of the penetrating member with respect to time with the processor and position sensor;
(d) accelerating the penetrating member towards a target tissue;
(e) in response to measuring relative position of the penetrating with respect to time using an adaptive control algorithm coupled to the penetrating driver to decelerate the penetrating member to follow a desired trajectory, wherein the penetrating member is not decelerated in a sudden manner where the target tissue bounds away from the penetrating member.
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Abstract
A method of controlling a penetrating member is provided. The method comprises providing a lancing device comprising a penetrating member driver having a position sensor and a processor that can determine the relative position and velocity of the penetrating member based on measuring relative position of the penetrating member with respect to time; providing a predetermined velocity control trajectory based on a model of the driver and a model of tissue to be contacted. In some embodiments, a feedforward control to maintain penetrating member velocity along said trajectory.
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6 Claims
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1. A method of controlling a penetrating member at a tissue site for receiving a body fluid from a wound created at the tissue site, the method comprising:
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(a) providing a lancing device that includes a penetrating member driver coupled to a position sensor and a processor, the position sensor and processor determining a relative position and velocity of the penetrating member based on measuring relative position of the penetrating member with respect to time; (b) launching the penetrating member from the lancing device; (c) measuring relative position of the penetrating member with respect to time with the processor and position sensor; (d) accelerating the penetrating member towards a target tissue; (e) in response to measuring relative position of the penetrating with respect to time using an adaptive control algorithm coupled to the penetrating driver to decelerate the penetrating member to follow a desired trajectory, wherein the penetrating member is not decelerated in a sudden manner where the target tissue bounds away from the penetrating member. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification