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High AFI linked to greater external version. (AFI More Than 15 CM).
SAN FRANCISCO -- A higher amniotic fluid index was associated with a greater rate of successful external cephalic version of a breech fetus in a prospective, observational study of 1,361 patients.
The study examined only the influence of amniotic fluid levels on the success rate of external version. Each group was comparable with regard to other factors, including maternal age, parity, gravidity, and breech type. The amniotic fluid level had a direct relationship with the likelihood of a successful version, Dr. Marc Boucher said at the annual meeting of the Society for Maternal-Fetal Medicine.
A high amniotic fluid index (AFI), defined as more than 15 cm, also was associated with a lower overall rate of cesarean section delivery, said Dr. Boucher, professor of maternal-fetal medicine at the University of Montreal.
All pregnant women at his institution between 1988 and 2001 who underwent an attempted external cephalic version of a normal term singleton in breech position had their amniotic fluid volumes measured immediately before the attempted version. AFI was less than 10 cm in 423 patients, 10-15 cm in 605 patients, and more than 15 cm in 333 patients.
Versions were successful most often in the group with the highest API and least successful in the women with the lowest AFI. (See chart.) A maximum of three version attempts was allowed per patient.
Frank breech presentations were significantly underrepresented in the higher AFI group (47%), compared with the lower AFI group (61%) and middle AFI group (60%). The highest AFI group had the lowest overall rate of C-sections (45%), while the lowest API group had' the highest rate (61%). These ...
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Source: HighBeam Research, High AFI linked to greater external version. (AFI More Than 15 CM).