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Plasma fibrinolysis during and after normal childbirth
Author(s) -
Mackin S.,
Walker I. D.,
Davidson J. F.,
Walker J. J.
Publication year - 1987
Publication title -
british journal of haematology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.907
H-Index - 186
eISSN - 1365-2141
pISSN - 0007-1048
DOI - 10.1111/j.1365-2141.1987.tb06864.x
Subject(s) - fibrinolysis , placenta , plasminogen activator , post partum , medicine , pregnancy , tissue plasminogen activator , endocrinology , childbirth , plasminogen activator inhibitor 1 , oxytocin , plasma levels , fetus , biology , genetics
Summary. A detailed sequential study of plasma fibrinolytic components in 42 healthy women during and after childbirth showed that striking changes occurred within minutes of placental separation. Significant increases in overall fibrinolytic activity were detected 1 5 min after delivery. During this period statistically significant increases in tissue plasminogen activator levels were noted but were overshadowed by a dramatic decrease in the level of plasminogen activator inhibitor (PAI). A 10‐fold fall in PAI was noted by days 3‐5 post‐partum, suggesting that the placenta is the major source of PAI detectable at the end of pregnancy and during labour. Persisting slightly elevated levels of PAI were detected for the first few days post partum. This may be due to increased production of normal‘endothelial’PAI in response to the vascular trauma incurred by placental separation, and in response to uterine vascular changes immediately post‐partum.