Joan Rivers died from low blood oxygen during surgery, medical examiner says
New York medical examiner says death of comedian last month resulted from a predictable complication from procedureJoan Rivers died from low blood oxygen during a routine medical procedure to check out voice changes and reflux, the medical examiner's office ruled Thursday.The comedian, who was 81, died on 4 September. She had been hospitalized for about a week when she went into cardiac arrest during the procedure at…