Which statement is true regarding Ventouse (vacuum extractor) :
Maternal trauma is less in vacuum than in forceps. Vacuum promote autorotation. So, it can be used in unrotated or malrotated occipitoposterior position of the head Ref: Dutta Obs 9e pg 539.
Minor scalp abrasion and Subgaleal hematomas in newborn are more frequent than forceps
Can be applied when fetal head is above the level of ischial spine
Maternal trauma is more frequent than forceps
Cannot be used when fetal head is not fully rotated
Abnormal labor