Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1992-03-10
1995-08-29
Prebilic, Paul
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604158, 604164, 604272, A61M 5178
Patent
active
054456177
ABSTRACT:
An automatic retractable safety penetrating instrument for introducing a portal sleeve into an anatomical cavity via a penetrating member disposed in the portal sleeve includes an operating member biased to move distally upon entry of the instrument into the anatomical cavity to automatically retract the penetrating member into the portal sleeve. The operating member can be carried by the penetrating member to be movable therewith or by a probe movable independent of the penetrating member. The instrument incorporates various locking and releasing mechanisms and spring arrangements chosen dependent upon ease of manufacture and assembly and procedures to be performed with the instrument. The instrument has the appearance of a standard trocar-like penetrating instrument and can be used in a manner familiar to surgeons while producing safety retraction upon entry into an anatomical cavity.
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