Recently amniotic-fluid replacement by the intrauterine injection of strongly hypertonic solutions has been used increasingly often to produce therapeutic abortions or to induce labour when the foetus is already known to be dead (Csapo, 1961;Wood, Booth, and Pinkerton, 1962). Few complications of the method have been reported, though it has been tried and discarded by other workers because of the risk of intrauterine sepsis (Peel, 1935). Two cases are reported in which widespread cerebral infarction occurred after the procedure and in which it was possible that the strongly hypertonic solutions employed were responsible for the brain damage.
Case 1A previously healthy 20-year-old secretary was advised, on psychiatric grounds, to have a therapeutic abortion in the 20th week of her first pregnancy. The operation was performed under local anaesthesia by inserting a fine trocar and cannula through the anterior abdominal and uterine walls into the amniotic cavity, removing about 200 ml. of amniotic fluid, which was lightly bloodstained, and injecting manually approximately 400 ml. of sterile 20 ', sodium chloride solution. She appeared well immediately afterwards, but complained of a burning sensation in her finger-tips. After about four hours her condition deteriorated, and she began to have epileptiform fits. About 12 hours after the operation her blood-pressure was said to be normal. Sedatives were given parenterally as symptomatic treatment, but she suddenly stopped breathing and died some 22 hours after the intrauterine injections. A dead foetus had been delivered 12 hours after the intra-amniotic injection. Twelve hours after the amniocentesis serum electrolytes were: chlorides 143 mEq/l., sodium 174 mEq/l., potassium 3.7 mEq/l., urea 26 mg./100 ml.Necropsy showed evidence of the recent pregnancy. In the anterior wall of the fundus of the uterus there were two puncture wounds which appeared to have penetrated through the placental bed. The brain on removal appeared to be slightly oedematous, and no subdural or subarachnoid haemorrhages were seen. The lungs showed patchy collapse. The cardiovascular system seemed to be normal and there was no evidence of air embolism. There was no peritonitis, nor any excess of fluid or blood in the peritoneal cavity. The kidneys appeared normal. The foetus and placenta were not available for examination.
Microscopical Examination of VisceraSections of heart, lungs, kidneys, liver, and spleen showed no histological abnormality. Pregnancy changes were seen in the pituitary, the breasts were active, and trophoblastic tissue was seen at the placental site in the uterus.
Brain and Spinal CordAfter fixation the brain was cut in coronal slices. These showed symmetrical haemorrhagic softenings of both amygdaloid nuclei, sparing only a thin rim supero-medially, and similar softening of the adjacent parts of both the right and left uncus (Special Plate, Fig. 1). The inferior parts of both claustra and the adjacent insular cortex were haemorrhagic. Other parts of the cerebrum appeared nor...