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INTRAORBITAL VALVE FRACTURE
Author(s) -
BORTHNE ANDERS
Publication year - 1973
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1973.tb06028.x
Subject(s) - tearing , inferior rectus muscle , antrum , traction (geology) , medicine , orbital fracture , anatomy , fracture (geology) , closing (real estate) , surgery , geology , materials science , extraocular muscles , geotechnical engineering , stomach , geomorphology , political science , law , composite material
A blow out fracture with a posteriorly hinged fragment in the orbital floor was found to create a valve mechanism when subperiosteal retraction was exerted on the orbital content for inspection of the fracture site. The valve mechanism which locked a part of the prolapse in the antrum was due to a movable and depressed fragment which hooked the overriding herniated soft tissues with its free edge. A traction on the inferior rectus muscle similar to a forced deduction test was demonstrated to have the same valve closing effect. The surgical problem was solved by freeing the prolapse from the fragment edge in the antrum, and keeping the “valve” open on retraction. This could be carried out without tearing the tissues by means of simple, malleable instruments that were at hand.