Artificial rupture of the membranes (ARM), also known as amniotomy, is a procedure in which the membranes containing the amniotic fluid (liquor) around the fetus are accessed through the cervix and broken or ruptured deliberately. In order to perform ARM, the membranes must be physically accessible through the cervix, i.e. the cervix needs to be at least 1 cm dilated.
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Sara, P., O’Brien, P. (2022). Artificial Rupture of the Membranes. In: Fernando, R., Sultan, P., Phillips, S. (eds) Quick Hits in Obstetric Anesthesia. Springer, Cham. https://doi.org/10.1007/978-3-030-72487-0_15
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