Implantable mechanical force sensor
First Claim
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1. A dynamic implanted sensing device, said device comprising:
- an implanted force generator producing a known force time profile;
an implanted accelerometer unit;
an electronic unit calculating a dynamic force measurement from an output received from a device component selected from the group consisting of;
said force generator and said accelerometer; and
a power source and a control signal source.
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Abstract
A device is provided for measuring the mechanical impedance of its surroundings. The device includes a force generator, a force sensor (32), an accelerometer unit (34), an electronic unit capable of calculating the impedance of the basis of outputs received from a device component and suitable power and control signal sources.
54 Citations
24 Claims
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1. A dynamic implanted sensing device, said device comprising:
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an implanted force generator producing a known force time profile;
an implanted accelerometer unit;
an electronic unit calculating a dynamic force measurement from an output received from a device component selected from the group consisting of;
said force generator and said accelerometer; and
a power source and a control signal source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
an implant housing having a cavity therein;
a closure adapted to selectively engage the cavity of said implant housing; and
a dynamic sensing device according to claim 1 adapted to insert within the cavity.
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9. The implant of claim 8 wherein said closure further comprising a wireless communication antenna.
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10. A dynamic implanted sensing device, said device comprising:
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an implanted force generator producing a known force time profile;
an implanted accelerometer unit;
an electronic unit calculating a dynamic force measurement from an output received from a device component selected from the group consisting of;
said force generator and said accelerometer; and
a power source and a control signal source;
wherein the output of said device is employed to infer the state of a non-biological adjacent structure. - View Dependent Claims (11)
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12. A process for force measurement comprising the steps of:
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producing a force independent of a preload bias at a device-sampling structure boundary;
sensing acceleration by measuring the relative displacement of a secondary mass elastically mounted to said device; and
calculating impedance therefrom. - View Dependent Claims (13, 14, 15, 16)
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17. A dynamic implanted sensing device, said device comprising:
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a plurality of implanted force sensors;
an implanted force generator producing a known force time profile, wherein the known force time profile is determined with a force sensor;
a plurality of implanted accelerometer units configured to provide a force measurement in two axes;
an electronic unit calculating a dynamic force measurement from an output received from a device component selected from the group consisting of;
said force generator and said accelerometer; and
a power source and a control signal source. - View Dependent Claims (19, 20, 21)
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18. A dynamic implanted sensing device, said device comprising:
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a force generator producing a known force time profile;
an accelerometer unit;
an electronic unit calculating a dynamic force measurement from an output received from a device component selected from the group consisting of;
said force generator and said accelerometer; and
a power source and a control signal source, wherein the device is implanted within biological tissue.
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22. An implant comprising:
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an implant housing having a cavity therein;
a closure adapted to selectively engage the cavity of said implant housing; and
a dynamic sensing device comprising a force generator producing a known force time profile;
an accelerometer unit;
an electronic unit calculating a dynamic force measurement from an output received from a device component selected from the group consisting of;
said force generator and said accelerometer; and
a power source and a control signal source, said dynamic sensing device adapted to insert within the cavity, wherein leads extend from said dynamic sensing device through said closure.
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23. An implant comprising:
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an implant housing having a cavity therein;
a closure adapted to selectively engage the cavity of said implant housing; and
a dynamic sensing device comprising a force generator producing a known force time profile;
an accelerometer unit;
an electronic unit calculating a dynamic force measurement from an output received from a device component selected from the group consisting of;
said force generator and said accelerometer; and
a power source and a control signal source, said dynamic sensing device adapted to insert within the cavity, wherein said dynamic sensing device calculates two axes impedance measurements.
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24. An implant comprising:
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an implant housing having a cavity therein;
a closure adapted to selectively engage the cavity of said implant housing; and
a dynamic sensing device comprising a force generator producing a known force time profile;
an accelerometer unit;
an electronic unit calculating a dynamic force measurement from an output received from a device component selected from the group consisting of;
said force generator and said accelerometer; and
a power source and a control signal source, said dynamic sensing device adapted to insert within the cavity, wherein a force is generated within said device independent of a preload bias.
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Specification