Electrode catheter for mapping and operating on cardiac cavities
First Claim
1. An intravenous electrode catheter for mapping and operating on cardiac cavities, the catheter comprising:
- an elongate tubular outer sheath of biocompatible material, the sheath having a distal end and a proximal end;
a first elongate spiral wound wire of biocompatible and electrically conductive material, received within the tubular sheath and including a distal electrically insulated operative portion extending from the distal end of said sheath;
a first ring disposed at a fixed position on the distal end of the sheath;
a second ring disposed on the distal operative portion of the first elongate spiral wound wire;
a second signal wound wire, disposed coaxially with the first spiral wound wire;
an external operatively associated operator mechanism;
a third ring formed of an electrically conductive and biocompatible material for measuring electrical cardiac activity, the third ring being associated coaxially with the first spiral wound wire and adapted for translatory movement along the operative portion of the first spiral wound wire by means of the second spiral wound wire having at least one end attached to the third ring and remaining end that is not connected to the third ring connected to the external operatively associated operator mechanism for inducing and controlling said translatory movement of the third ring; and
altering means for altering a configuration of the operative portion of the first spiral wound wire, said means including a flexible tension element interconnecting the second ring and the distal end of the sheath, the flexible tension element being axially movable in relation to the first wire so as to control the length of the interconnection therebetween according to a cardiac cavity morphology, in such manner that the operative portion can be brought into continuous wiping contact with an interior surface of the cavity by rotating the first spiral wound wire through 360°
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Accused Products
Abstract
An electrode catheter for intravenous insertion into a cavity of the heart comprises a tubular sheath accommodating a first spiral wound wire of conductive biocompatible material, which affords an insulated operative portion exposed from the sheath and capped distally by a domed ring, and a mapping electrode of conductive biocompatible material for sensing the electrical activity in the cardiac muscle, which is carried coaxially by the first spiral wound wire and capable of movement along the operative portion transmitted by means of a second spiral wound wire extending coaxially through the first and connected to an external control handset. The operative portion of the first wire is arched by means of a tension wire designed to establish a restraint between the domed ring and the distal end of the sheath, of which the length can be increased or reduced to alter the loop of the arched profile as expedient for the shape of the cavity explored.
236 Citations
31 Claims
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1. An intravenous electrode catheter for mapping and operating on cardiac cavities, the catheter comprising:
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an elongate tubular outer sheath of biocompatible material, the sheath having a distal end and a proximal end; a first elongate spiral wound wire of biocompatible and electrically conductive material, received within the tubular sheath and including a distal electrically insulated operative portion extending from the distal end of said sheath; a first ring disposed at a fixed position on the distal end of the sheath; a second ring disposed on the distal operative portion of the first elongate spiral wound wire; a second signal wound wire, disposed coaxially with the first spiral wound wire; an external operatively associated operator mechanism; a third ring formed of an electrically conductive and biocompatible material for measuring electrical cardiac activity, the third ring being associated coaxially with the first spiral wound wire and adapted for translatory movement along the operative portion of the first spiral wound wire by means of the second spiral wound wire having at least one end attached to the third ring and remaining end that is not connected to the third ring connected to the external operatively associated operator mechanism for inducing and controlling said translatory movement of the third ring; and altering means for altering a configuration of the operative portion of the first spiral wound wire, said means including a flexible tension element interconnecting the second ring and the distal end of the sheath, the flexible tension element being axially movable in relation to the first wire so as to control the length of the interconnection therebetween according to a cardiac cavity morphology, in such manner that the operative portion can be brought into continuous wiping contact with an interior surface of the cavity by rotating the first spiral wound wire through 360°
. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electrode catheter comprising:
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an elongate body member having a proximal non-active portion and a distal operative portion; a proximal electrode on a distal end of said non-active portion of the elongate body member; a distal electrode on a distal end of said operative portion of the elongate body member; and
,a medial electrode axially slidable along the elongate body member in said operative portion between said distal electrode and said proximal electrode. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An electrode catheter comprising:
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an elongate body member having a longitudinal axis and defining a proximal non-active portion and a distal operative portion; and
,a first electrode having an internal helical surface for engaging the elongate body member, said first electrode being axially slidable along the elongate body member in said operative portion. - View Dependent Claims (28, 29, 30, 31)
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Specification