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F50Short‐term variation (STV) in centralized fetuses
Author(s) -
Cha S.C.,
Toma O.T.,
Braia G.O.,
Lopes M.A.,
Carvalho M.B.
Publication year - 2000
Publication title -
ultrasound in obstetrics and gynecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.202
H-Index - 141
eISSN - 1469-0705
pISSN - 0960-7692
DOI - 10.1046/j.1469-0705.2000.00015-1-50.x
Subject(s) - fetus , cardiotocography , medicine , pregnancy , biology , genetics
Aim To evaluate the importance of STV in centralized fetuses. Material and method 43 centralized fetuses were evaluated by computorized cardiotocography (CCT) (System 8002 – Oxford). As group control, 1235 computorized cardiotocography trace from fetuses with normal Doppler were analysed. Result At 10 min of CCT, 15/43 (35%) of centralized fetuses showed STV < 4 msec. At the end of CCT 4 (9.4%) centralizad fetuses maintainned STV < 4 msec against only 12 (1%) fetuses in the normal group. The duration of CCT in centralized fetuses was 30 ± 10 min and 20 ± 9 min in the normal group. The mean STV of centralized fetuses was significantly lower than normal fetuses at any time of the trace. At the end of the trace, STV in centralized fetuses was 5.5 ± 1.5 msec and in normal fetuses was 8.7 ± 2.5 msec ( P < 0.05). However, 90% of centralized fetuses showed normal CCT (STV > 4 msec. or presence of two or more transitory acceleration). Conclusion This preliminary study shows that short‐term variation seems to be earliest abnormal finding at CTC in centralized fetuses. Since 90% of centralized fetuses had normal CCT (STV > 4 msec.), this parameter can be used to avoid premature interruption of the pregnancy due to abnormal Doppler.