Method and apparatus for body fluid sampling and analyte sensing
First Claim
Patent Images
1. A method of controlling penetrating member velocity, the method comprising:
- advancing the penetrating member to reach a first desired velocity;
providing a controller for applying braking force;
applying variable amounts of braking force and driving force to follow a predicted velocity profile, checking in each braking cycle whether braking force should be varied wherein a braking cycle is varied for penetration depth control.
2 Assignments
0 Petitions
Accused Products
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.
2923 Citations
5 Claims
-
1. A method of controlling penetrating member velocity, the method comprising:
-
advancing the penetrating member to reach a first desired velocity; providing a controller for applying braking force; applying variable amounts of braking force and driving force to follow a predicted velocity profile, checking in each braking cycle whether braking force should be varied wherein a braking cycle is varied for penetration depth control. - View Dependent Claims (2)
-
-
3. A method of body fluid sampling comprising:
-
moving a penetrating member at velocities conforming to a selectable velocity profile or motion waveform; measuring force applied by user to a front end of a lancing device; determining amount of tissue tenting; recording tenting and force; and applying a braking cycle in response to tenting. - View Dependent Claims (4)
-
-
5. A method of determining contact between a tip of a penetrating member and target tissue of a patient comprising:
-
(a) 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; (b) Measuring a magnitude of deceleration of the penetrating member during at least a portion of an inward cutting stroke of a lancing cycle and comparing the magnitude of the measured deceleration to a known value of deceleration; and (c) Determining contact if the magnitude of the measured deceleration is greater than the magnitude of the known value of deceleration.
-
Specification