Accelerometer-based contact sensing assembly and system
First Claim
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1. A method 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 an accelerometer coupled to the electrode; and
monitoring an output of the accelerometer to recognize when the electrode comes into contact with a tissue surface of an endocardial wall of a heart of the patient, and detecting when the electrode contacts the tissue surface by recognizing, using said accelerometer output, when the electrode motion corresponds to a motion of the tissue surface.
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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.
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Citations
19 Claims
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1. A method comprising:
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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 an accelerometer coupled to the electrode; and monitoring an output of the accelerometer to recognize when the electrode comes into contact with a tissue surface of an endocardial wall of a heart of the patient, and detecting when the electrode contacts the tissue surface by recognizing, using said accelerometer output, when the electrode motion corresponds to a motion of the tissue surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method, comprising:
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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; providing a plurality of accelerometers coupled to the electrode; and monitoring respective outputs of the plurality of accelerometers to recognize when the electrode comes into contact with a tissue surface in a body of a patient by recognizing, using the accelerometer outputs, when the electrode motion corresponds to a motion of the tissue surface. - View Dependent Claims (17, 18, 19)
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Specification