A primapara with pelvis size 25-2831-20 cm has active labor activity. Waters poured out, clear. Fetus weight is 4500 g, the head is engaged to the small pelvis inlet. Vasten's sign as positive. Cervix of uterus is fully dilated. Amniotic sac is absent. The fetus heartbeat is clear, rhythmic, 136 bpm. What is the labor tactics?

Answer options

1. Vacuum extraction of the fetus
2. Obstetrical forseps
3. Conservative tactics of labor
4. Caesarean section
5. Stimulation of the labor activity

Explanation

A primapara with pelvis size 25-28-31-20 cm has active labor activity. Waters poured out, clear. Fetus weight is 4500 g, the head is engaged to the pelvic inlet. Vasten’s sign is positive. Cervix of uterus is fully dilated. Amniotic sac is absent. The fetal heartbeat is clear, rhythmic, 136 bpm. What is the labor tactics?Normal pelvic sign: mnemonic SCTED.Spinarum: 25-26 D.Cristarum: 28-29 D.Trocanterica: 31 -32 External conjugate: 20-21Positive Vasten‘ sign (if disproportion between fetal head and symphysis pubis is prominent – Vasten‘ sign is positive if disproportion between fetal head and symphysis pubis is absent – Vasten‘ sign is negative).