Sterile spinal needle with stylet. Description of test You or a close relative will be required to sign a consent form after the procedure has been explained to you. Fold hands behind your head. The anesthetic is administered. The procedure does not begin until you are numb.
Skin is cleaned with antiseptic.
Position of the fetus is determined by ultrasonography. Sterile spinal needle is inserted through skin, muscle and uterus into the amniotic cavity. It is aimed toward the back of the neck of the fetus. Needle is withdrawn. Small bandage is placed over the injection-withdrawal site on the skin.