Tissue penetration device
3 Assignments
0 Petitions
Accused Products
Abstract
A tissue penetration device and method of using same. The tissue penetration device may optionally include sampling and analyzing functions, which may be integrated. An embodiment provides control of a lancet used for sampling blood. Electric field coils or solenoids may drive the lancet using electromagnetic force. Advancement and retraction of a lancet may be controlled by a feedback loop monitoring the position and velocity of the lancet embodiments of the lancet driver can be configured to follow a predetermined tissue lancing profile. Embodiments of the invention include a lancet and method for using a lancet to maintain the patency of the wound tract once the lancet has cut into the skin.
199 Citations
148 Claims
-
1-143. -143. (canceled)
-
144. A method of measuring penetration depth of a lancet during a lancing cycle comprising:
-
(a) driving the lancet toward the patient'"'"'s target tissue;
(b) measuring a contact point of the lancet with the target tissue;
(c) advancing the lancet into the target tissue to a position of maximum penetration and removing substantially all force imparted from the lancet driver to the lancet at the position of maximum penetration;
(d) measuring the elastic recoil displacement of the lancet in a proximal direction due to elastic recoil of target tissue after force from lancet driver is removed; and
(e) subtracting the magnitude of elastic recoil displacement from the magnitude of lancet displacement measured from the contact point to the position of maximum penetration. - View Dependent Claims (145, 146, 147)
-
-
148-353. -353. (canceled)
Specification