Blood flow velocity measurement device
First Claim
1. An intracardiac blood flow velocity measurement system comprising:
- a catheter adapted for insertion into a heart through a blood vessel;
at least one blood flow velocity detecting means, mounted on said catheter, for detecting blood flow velocity at a detecting position in a selected detecting area when said catheter is inserted into said heart;
a plurality of electrical conductors contained in said catheter, each conductor having a distal end electrically connected to said blood flow velocity detecting means and each conductor having a proximal end;
electronic circuitry means, connected to the respective proximal ends of said electrical conductors, for receiving and processing blood flow velocity data generated by said blood flow velocity detecting means; and
said blood flow velocity detecting means comprising at least two electrodes respectively consisting of two different biocompatible materials, and at least a first of said at least two electrodes comprising a polarizable electrode and being disposed in said detecting position and a second of said at least two electrodes being disposed on said catheter axially spaced from said first electrode.
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Accused Products
Abstract
An intracardiac blood flow velocity measurement device has a catheter adapted to be inserted through a blood vessel into the heart, at least two electrodes made of two different biocompatible materials mounted on the catheter at a detecting position which is located in a selected detecting area when the catheter is inserted into the heart for detecting blood flow velocity, with at least one of the electrodes being formed as a polarizable electrode and being disposed in the detecting position, and another of the electrodes being located on the catheter at an axially spaced distance from the polarizable electrode. Variation in an over-voltage or in a galvanic voltage is detected, and is used as a blood flow velocity signal.
44 Citations
22 Claims
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1. An intracardiac blood flow velocity measurement system comprising:
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a catheter adapted for insertion into a heart through a blood vessel; at least one blood flow velocity detecting means, mounted on said catheter, for detecting blood flow velocity at a detecting position in a selected detecting area when said catheter is inserted into said heart; a plurality of electrical conductors contained in said catheter, each conductor having a distal end electrically connected to said blood flow velocity detecting means and each conductor having a proximal end; electronic circuitry means, connected to the respective proximal ends of said electrical conductors, for receiving and processing blood flow velocity data generated by said blood flow velocity detecting means; and said blood flow velocity detecting means comprising at least two electrodes respectively consisting of two different biocompatible materials, and at least a first of said at least two electrodes comprising a polarizable electrode and being disposed in said detecting position and a second of said at least two electrodes being disposed on said catheter axially spaced from said first electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification