A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 25/01 (2006.01)
Patent
CA 2075205
A steering mechanism (315) in- cluding a steering shaft (320) coupled to a controller (410) which includes a handle (540) and apparatus for mani- pulating the distal end (340) of the steering shaft. The steering shaft in- cludes a flexible coiled spring (170) having a lead spring (350) fixed in po- sition with respect to a distal end there- of in the distal end of the steering shaft. One or more steering wires (360, 370) is affixed at the distal ends there- of to the lead spring. The steering wires extend through the steering shaft to the controller, and the steering apparatus of the controller is used to place ten- sion on one or both of the steering wires. The attachment of the distal ends of the steering wires to the lead spring may be opposite one another or may be offset for providing greater maneuverability. Tension may be placed on the steering wires by wedges (650, 660) mounted transversely to the controller housing, or by rotation of a shaft (450) mounted transversely to the controller housing, the steering wires being attached to the shaft such that rotation in one direction tenses one steering wire, and rotation in the other direction tense's the other steering wire. Two independently rotatable shafts (1560, 1590) may be used to separately control the two steering wires. The steering shaft is adapted for insertion into a lumen (45) of a catheter (40) far use in guiding the distal end of the cathe- ter to a treatment site within a patient. The steering mechanism may also be used in conjunction with tools or apparatus which must reach into difficult locations, such as engines or other machines.
Lundquist Ingemar
Thompson Russell Blake
Boston Scientific Limited
Ep Technologies Inc.
Smart & Biggar
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