Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1992-09-30
1994-02-08
Rosenbaum, C. Fred
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
606185, 606172, A61M 5178
Patent
active
052844749
ABSTRACT:
In accordance with this invention a disposable trochar for use as a gas insufflation needle is provided for insertion through the abdominal wall of a patient and into a body cavity. It has an outer sheath with a tubular body, a distal open end and a proximate open end. The distal end may have means which is expandable after the trochar has been inserted into the body cavity to minimize dislocation of the outer sheath during use. A cannula is removably received within in the sheath which has a sharp distal end extendable beyond the distal end of the sheath and an enlarged head at the proximate end of the cannula. The head has a flat land which is engageable with the proximate end of the sheath to limit the extension of the distal end of the cannula beyond the distal end of the sheath. A rod is mounted within the cannula for longitudinal movement between a retracted position and an extended position. A blunt member is provided at the distal end of the rod extending beyond the sharp distal end of the cannula when in extended position. A spring, in a cavity in the head, is attached to the proximate end of the rod urging it toward the extended position. The method of using the trochar is also disclosed.
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Picture of Veress needle apparatus.
Mendez Manuel
Rosenbaum C. Fred
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