Tissue penetration device
First Claim
Patent Images
1. A tissue penetration device, comprising:
- a) a magnetic source that produces a controllable magnetic field in a magnetically active region adjacent the magnetic source;
b) a magnetic member disposed at least partially in the magnetically active region;
c) a permanent magnet disposed at a proximal end of the magnetically active region for zeroing the position of the magnetic member while the tissue penetration device is inactive.
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Abstract
A tissue penetration device includes a magnetic source that produces a controllable magnetic field in a magnetically active region adjacent the magnetic source. A magnetic member is disposed at least partially in the magnetically active region. A permanent magnet is disposed at a proximal end of the magnetically active region for zeroing the position of the magnetic member while the tissue penetration device is inactive.
228 Citations
10 Claims
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1. A tissue penetration device, comprising:
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a) a magnetic source that produces a controllable magnetic field in a magnetically active region adjacent the magnetic source;
b) a magnetic member disposed at least partially in the magnetically active region;
c) a permanent magnet disposed at a proximal end of the magnetically active region for zeroing the position of the magnetic member while the tissue penetration device is inactive. - View Dependent Claims (2, 3, 4)
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5. A controllable electromagnetic driver for driving a lancet and obtaining a sample of blood from a patient, comprising:
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a) a driver coil pack having a proximal end and a distal end comprising a plurality of adjacent electric coils with each coil being comprised of an electrical conductor wound about an axial lumen of each coil with the axial lumens of the coils in a coaxial configuration;
b) an elongate coupler shaft having a proximal end and a distal end disposed within an axial lumen of the driver coil pack;
c) a magnetic member secured to a distal portion of the elongate coupler shaft and configured to slide axially within the axial lumen of the driver coil pack;
d) a position sensor disposed at adjacent the driver coil pack, comprising an optical reader and an optical flag secured to a proximal section of the coupler shaft with the optical flag configured to slide axially adjacent the optical reader and to measure the position of the coupler shaft relative to the position sensor and driver coil pack;
e) a processor which is electrically coupled to the electrical conductors of the plurality of adjacent electric coils and position sensor and which is configured to control a magnitude of a magnetic field in the axial lumen of the driver coil pack by controlling the amount of electrical current flowing through the electrical conductor of each coil based on closed loop feedback position data from the position sensor; and
f) a lancet coupler secured to the distal end of the coupler shaft and configured to be coupled to a lancet. - View Dependent Claims (7, 8, 9, 10)
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6. A flat coil tissue penetration device, comprising:
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a) a magnetic source that produces a first magnetic field in a first magnetically active region and a second magnetic field in a second magnetically active region;
b) a flat coil secured to a translation substrate and having a leading segment disposed at least partially within the first magnetically active region and. a trailing segment disposed at least partially within the second magnetically active region; and
c) a sharpened member configured to penetrate tissue and mechanically coupled to the translation substrate.
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Specification