Surgery – Instruments – Electrical application
Reexamination Certificate
2006-07-25
2006-07-25
Johnson, III, Henry M. (Department: 3739)
Surgery
Instruments
Electrical application
C128S898000, C600S374000, C607S122000
Reexamination Certificate
active
07081114
ABSTRACT:
A remotely deflectable electrophysiology/ablation catheter of the type intended for placing into an interior passage of the heart is disclosed. The distal end of this elongated tubular catheter has a pair of tension/compression members each with a flattened end portion connected to the distal electrode and extending through the catheter casing and attached to a user moveable actuator for effecting the tension/compression thereon for remotely curling the distal end of the catheter. Spaced ring electrodes are provided adjacent the distal electrode. A permanent bend is pre-formed in the casing and tension/compression members adjacent the ring electrodes about an axis perpendicular to the elongated tension/compression members. Movement of the remote actuator causes the distal portion of the catheter to curl into a lariat in a plane perpendicular to the axis along the elongated catheter casing, thus permitting electrical mapping or ablation with the distal and/or ring electrodes about the inner surface of the heart passage into which the lariat is formed and situated. The lariat can achieve a curvature greater than 360 degrees and at a significantly reduced radius to allow insertion of the catheter distal end into passages of reduced dimension.
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Johnson, III Henry M.
St. Jude Medical, Atrial Fibrillation Division, Inc.
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