Anectine and girls

In 1980, my neice was given Anectine anesthesia during a D & C procedure. Her side effects were: blood pressure dropped dramatically, could not breathe on her own, no feeling in extremities. Weakness continued for several days after returning home. It was discovered her father's mother had the same symtoms. After testing other sibs, they found all girls in that family was allergic to Anectine but NOT the boys. This was declared to be hereditary and the girls had a less than normal amount of pseudocholinesterase which did not allow the Anectine to be broken down in the body.