Accelerometer-based contact sensing assembly and system
First Claim
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1. A catheter comprising:
- a shaft having a proximal portion, and a distal portion;
an electrode having a main body extending along an axis and including a tip and an axially opposite base wherein the base is configured to be coupled to said distal portion of the shaft, and wherein the base of said electrode includes a lumen having a proximally-facing opening; and
an accelerometer disposed in the lumen to thereby couple said accelerometer to said electrode such that when said electrode is displaced said accelerometer experiences an acceleration of said electrode, said accelerometer being configured to generate a signal indicative of the acceleration of said electrode.
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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.
6 Citations
32 Claims
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1. A catheter comprising:
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a shaft having a proximal portion, and a distal portion; an electrode having a main body extending along an axis and including a tip and an axially opposite base wherein the base is configured to be coupled to said distal portion of the shaft, and wherein the base of said electrode includes a lumen having a proximally-facing opening; and an accelerometer disposed in the lumen to thereby couple said accelerometer to said electrode such that when said electrode is displaced said accelerometer experiences an acceleration of said electrode, said accelerometer being configured to generate a signal indicative of the acceleration of said electrode. - View Dependent Claims (2, 3, 6, 7, 8, 16, 17, 18, 19, 20)
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4-5. -5. (canceled)
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9-15. -15. (canceled)
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21. A catheter system, comprising:
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a catheter including a shaft having a proximal portion and a distal portion; an electrode coupled to said distal portion of the shaft; an accelerometer coupled to said electrode and configured to generate a signal indicative of an acceleration of said electrode; a receiver electrically coupled to said catheter configured to receive said signal indicative of the acceleration of said electrode, said receiver including a processor that is configured to process said signal to produce a parameter indicative of an applied force experienced by said electrode of said catheter. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. 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 in a body of a patient. - View Dependent Claims (30, 31, 32)
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Specification