SYSTEM AND METHOD FOR MEASURING FORCE AND TORQUE APPLIED TO A CATHETER ELECTRODE TIP
First Claim
1. A contact sensing assembly comprising:
- a catheter including a body having a proximal end and a distal end;
an electrode including a tip portion and a base portion mounted adjacent a head portion of the catheter body; and
at least one force and torque sensor disposed generally adjacent the base portion and including at least one pressure sensor for measuring pressure applied to the electrode tip portion and providing a pressure signal related to the measured pressure, the pressure sensor including a predetermined sensitivity,wherein the base and head portions include a predetermined rigidity so that force applied to the electrode tip portion is determinable as a function of the predetermined sensitivity and the pressure signal.
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Accused Products
Abstract
A contact sensing assembly including a catheter including an electrode having a base portion mounted adjacent a head portion of the catheter body. A sensor is disposed adjacent the base portion for measuring compression or tensile forces applied to an electrode tip portion, and includes a predetermined sensitivity. The base and head portions include predetermined rigidity so that forces applied to the electrode tip portion are determinable as a function of the sensitivity and a sensor output. A contact sensing assembly also includes an electrode pipe operatively connected to the catheter body for movement and bending with the catheter body, and an electrode wire disposed in the electrode pipe and including isolation. A change in capacitance resulting from movement of the electrode wire toward the electrode pipe or contact of the electrode wire with the electrode pipe during bending of the catheter correlates to a force applied to the catheter.
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Citations
39 Claims
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1. A contact sensing assembly comprising:
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a catheter including a body having a proximal end and a distal end; an electrode including a tip portion and a base portion mounted adjacent a head portion of the catheter body; and at least one force and torque sensor disposed generally adjacent the base portion and including at least one pressure sensor for measuring pressure applied to the electrode tip portion and providing a pressure signal related to the measured pressure, the pressure sensor including a predetermined sensitivity, wherein the base and head portions include a predetermined rigidity so that force applied to the electrode tip portion is determinable as a function of the predetermined sensitivity and the pressure signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A contact sensing assembly comprising:
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a catheter including a body having a proximal end and a distal end; an electrode including a tip portion and a base portion mounted adjacent a head portion of the catheter body; and at least one sensor disposed generally adjacent the base portion for measuring compression or tensile forces applied to the electrode tip portion and providing an output signal related to the measured forces, the sensor including a predetermined sensitivity, wherein the base and head portions include a predetermined rigidity so that the compression or tensile forces applied to the electrode tip portion are determinable as a function of the predetermined sensitivity and the output signal. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A contact sensing assembly comprising:
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a catheter including a body having a proximal end and a distal end; an electrode pipe disposed in the catheter body; and an electrode wire disposed in the electrode pipe and including isolation thereon, wherein a change in capacitance resulting from movement of the electrode wire toward the electrode pipe or contact of the electrode wire with the electrode pipe during bending of the catheter directly correlates to a force applied to the catheter. - View Dependent Claims (31, 32, 33, 34)
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35. A contact sensing assembly comprising:
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a catheter including a body having a proximal end and a distal end; an electrode pipe operatively connected to the catheter body for at least one of movement and bending with the catheter body; and an electrode wire disposed in the electrode pipe and including isolation thereon, wherein a change in capacitance resulting from movement of the electrode wire toward the electrode pipe or contact of the electrode wire with the electrode pipe during bending of the catheter directly correlates to a force applied to the catheter. - View Dependent Claims (36, 37, 38, 39)
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Specification