Surgery – Instruments
Patent
1994-04-06
1996-08-27
Thaler, Michael H.
Surgery
Instruments
606198, 604105, 604164, 604174, A61B 1700
Patent
active
055495958
ABSTRACT:
A trocar assembly is disclosed for use in inserting a laparoscopic instrument into the abdominal cavity during surgery and includes a cylindrical member activated by intermeshing gears to expand a cylindrical member having a normally retracted outer diameter when the trocar assembly is within the abdominal cavity, to resist withdrawing movement of the assembly from the abdominal cavity.
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patent: 4655219 (1987-04-01), Petruzzi
patent: 4994079 (1991-02-01), Genese et al.
patent: 4995868 (1991-02-01), Brazier
patent: 5002557 (1991-03-01), Hasson
patent: 5122122 (1992-06-01), Allgood
patent: 5147378 (1992-09-01), Markham
patent: 5197971 (1993-03-01), Bonutti
Dexide, Inc.
Felsman Robert A.
Perdue Mark D.
Thaler Michael H.
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