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Korean Journal of Obstetrics & Gynecology 2003;46(7):1385-1390.
Published online July 1, 2003.
Association of Membrane Thickness, Histopathologic Findings and Premature Rupture of the Membranes.
Joon Cheol Park, Sung Do Yoon
Department of Obstetric and Gynecology, Keimyung University, School of Medicine, Korea.
Abstract
OBJECTIVE
The aim of our study was to compare the thickness and histopathologic changes in the fetal membrane between premature rupture of membranes (PROM) and intact membrane after delivery. METHODS: In a prospective study involving 31 patients who were divided into 4 groups such as <37 weeks without PROM, <37 weeks with PROM, >or=37 weeks without PROM, and >or=37 weeks with PROM, we measured the thickness of membrane and studied the histopathologic findings in vitro by light microscopy of histological sections. RESULTS: The membrane thickness of <37 weeks with PROM group was thinner (35.9 micrometer) than that (42.3 micrometer) of <37 weeks without PROM group, but there was no statistical significance. The membrane thickness of >or=37 weeks with PROM and >or=37 weeks without PROM were similar (25.6 micrometer, 26.0 micrometer). But the membrane thickness of >or=37 weeks with/without PROM was significantly thinner (25.8 micrometer) compared with that (38.9 micrometer) of <37 weeks with/without PROM. The histopathologic features of PROM positive group was amnionitis with neutrophilic infiltration, focally or diffusely necrotic change of amniotic membrane, separation of amniotic membrane and degeneration of chorionic villi. CONCLUSION: The thickness of fetal membrane between PROM group and intact membrane group was not different but the thickness of fetal membrane between <37 weeks and >or=37 weeks was statistically significant. The histopathologic change of PROM positive group was prominent as amnionitis. Further evaluation will be needed about the relationship between membrane thickness and PROM.
Key Words: Premature rupture of membranes (PROM), Thickness and histopathologic findings of amnion


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