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US 2010/0168559 A1Published application
Accelerometer-based contact sensing assembly and system
AssigneeSt. Jude Medical, Atrial Fibrillation Division, Inc.
InventorsTroy T. Tegg, Saurav Paul
Life of this patent
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Abstract
A catheter system including an accelerometer-based sensing assembly is provided. In particular the present teachings relate to an accelerometer based assembly used to determine contact between a catheter and surrounding proximate tissue, such as cardiac tissue. An embodiment of such a system may, for example, be used for visualization, mapping, ablation, or other methods of diagnosis and treatment of tissue and/or surrounding areas.
Claims25
A catheter comprising:
- a shaft having a proximal portion, and a distal portion;
- an electrode coupled to said distal portion of the shaft;
- and
- an accelerometer configured to generate a signal indicative of an acceleration of said electrode.
1 more element
An accelerometer-based catheter system comprising:
- a catheter including a body having a stiff proximal portion and a flexible distal portion;
- an electrode including a proximal end coupled to the flexible distal portion of the catheter, and a distal portion configured to interact with a treatment area;
- an plurality of accelerometers operatively connected to the electrode and configured to output signals representative of the acceleration of the electrode;
- and
- a catheter mapping unit configured to map the catheter location based at least in part on output signals from at least a subset of the plurality of accelerometers.
2 more elements
A method for detecting catheter contact with tissue, comprising:
- providing a catheter having a proximal portion and a flexible distal portion, the proximal portion being stiff relative to the flexible distal portion providing an electrode coupled to the flexible distal portion, and a plurality of accelerometers coupled to the electrode;
- and
- monitoring the outputs of the plurality of accelerometers to determine an electrode acceleration vector.
Dependencies are inferred from the claim text.