Apparatus for magnetically deployable catheter with MOSFET sensor and method for mapping and ablation
First Claim
1. A system for mapping endocardial tissue, said system, comprising:
- a catheter having a catheter distal end for insertion into a patient;
a plurality of sensors associated with said distal end, wherein said plurality of sensors are configured to obtain measurements of electrical potential of endocardial tissue in contact with said sensors such that current flow in each sensor is proportional to said electrical potential of said endocardial tissue, wherein each of the plurality of sensors comprise;
a housing in contact with said tissue;
a transistor with a first P-N junction between a first gate junction and a source terminal and between said gate junction and a drain terminal, wherein said source terminal and drain terminal are connected to said housing in contact with said endocardial tissue such that said gate junction assumes said potential of said endocardial tissue;
a computer accessible memory that stores said measurements of said electrical potential of said endocardial tissue obtained by said plurality of sensors over a time duration; and
one or more computer processors that correlate said measurements of said electrical potential of said endocardial tissue with a location of said distal end of said catheter to create an endocardial map of said tissue.
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Accused Products
Abstract
A mapping and ablation catheter is described. In one embodiment, the catheter includes a MOSFET sensor array that provides better fidelity of the signal measurements as well as data collection and reduces the error generated by spatial distribution of the isotropic and anisotropic wavefronts. In one embodiment, the system maps the change in potential in the vicinity of an activation wavefront. In one embodiment, the mapping system tracks the spread of excitation in the heart, with properties such as propagation velocity changes. In one embodiment, during measurement, the manifold carrying the sensor array expands from a closed position state to a deployable open state. Spatial variation of the electrical potential is captured by the system'"'"'s ability to occupy the same three-dimensional coordinate set for repeated measurements of the desired site. In one embodiment, an interpolation algorithm tracks the electrogram data points to produce a map relative to the electrocardiogram data.
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Citations
33 Claims
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1. A system for mapping endocardial tissue, said system, comprising:
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a catheter having a catheter distal end for insertion into a patient; a plurality of sensors associated with said distal end, wherein said plurality of sensors are configured to obtain measurements of electrical potential of endocardial tissue in contact with said sensors such that current flow in each sensor is proportional to said electrical potential of said endocardial tissue, wherein each of the plurality of sensors comprise; a housing in contact with said tissue; a transistor with a first P-N junction between a first gate junction and a source terminal and between said gate junction and a drain terminal, wherein said source terminal and drain terminal are connected to said housing in contact with said endocardial tissue such that said gate junction assumes said potential of said endocardial tissue; a computer accessible memory that stores said measurements of said electrical potential of said endocardial tissue obtained by said plurality of sensors over a time duration; and one or more computer processors that correlate said measurements of said electrical potential of said endocardial tissue with a location of said distal end of said catheter to create an endocardial map of said tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification