Surgical knife

Details Surgical knife Surgical knife

1987-01-20

1988-12-13

Thaler, Michael H.

Surgery

Truss

Pad

A61B 1732

Patent

active

047903120

ABSTRACT:
A surgical instrument for operating percutaneously in a living body includes an elongated hollow handle, a shaft with a proximal portion extending within and secured, during use, to the handle and a distal portion extending distally of the handle, a cutting device, e.g., a surgical blade, fixedly supported during use by the distal end of the shaft, and a slidable tubular sheath having a distal portion extending distally of the handle, about the shaft, to the region of the blade. The sheath is sized and constructed for introduction into the living body through a puncture opening in its flesh. The instrument includes a mechanism, e.g., a sliding or rotating actuation knob, for moving the sheath axially relative to the handle between a first position in which the distal portion of the sheath surrounds the blade enabling safe positioning of the instrument in the body without cutting, and a second, retracted position exposing the blade. The position of the blade relative to the handle is fixed during movement of the sheath.

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