Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1993-10-22
1995-12-05
Weiss, John G.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604264, 606182, A61M 5170, A61M 500
Patent
active
054724279
ABSTRACT:
A trocar device is disclosed which is adapted for insertion into a body cavity, such as the abdominal cavity, without the need for cavity insufflation. The trocar device comprises applicator and trocar components. The trocar components comprises a cylindrical trocar tube and detachable obdurator. The applicator comprises a housing into which the trocar and obdurator are loaded prior to insertion, and means for applying a force, such as a spring or electric motor, to drive the obdurator and trocar through the body wall into the cavity. Various electrical and mechanical means are provided for limiting the penetration depth of the obdurator. In one embodiment, sonic transducer means are provided for detecting a phase change in reflected sonic waves at the internal body wall boundary to stop trocar penetration. Several alternative embodiments of the apparatus and method of use are disclosed.
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