Multi-position ratchet mechanism

A multi-position ratchet mechanism for holding a surgical retractor blade (18) which permits a retractor blade to be rotated into the wound and retracted at the same time to duplicate the natural "toe-in" method of retraction achieved with the hand. The ratchet mechanism includes a ratchet...

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Bibliographic Details
Main Authors AMARAL, JOHN J, CABRERA, RENE J, BOOKWALTER, JOHN R, AMARAL, FRANCISCO A
Format Patent
LanguageEnglish
French
German
Published 15.07.1998
Edition6
Subjects
CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BYMECHANICAL FEATURES ONLY
CONTROLLING
DIAGNOSIS
HUMAN NECESSITIES
HYGIENE
IDENTIFICATION
MEDICAL OR VETERINARY SCIENCE
PHYSICS
REGULATING
SURGERY
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Summary:A multi-position ratchet mechanism for holding a surgical retractor blade (18) which permits a retractor blade to be rotated into the wound and retracted at the same time to duplicate the natural "toe-in" method of retraction achieved with the hand. The ratchet mechanism includes a ratchet holder (30) to which is pivotally attached a ratchet pivot housing (32). The retractor blade is mounted in an opening (42) projecting through ratchet pivot housing and held in position by a retractor pawl (44) attached to the ratchet pivot housing. The ratchet pivot housing also has a curved ratchet (68) which depends into a cooperating slot (70) in the ratchet holder and engages a ratchet release bar (80) which is mounted on the ratchet holder and spring biased into the ratchet slot. One end of ratchet release bar is positioned under an actuating surface (52) of the retractor pawl. The application of pressure on the actuating surface will release both ratchets to allow adjustment of the retractor blade.
Bibliography:Application Number: EP19940308353