The only two accelerants that I could see that may possibly have been there under normal circumstances are alcohol and oxygen. He was probably on O2 before coding... not sure why there would have been any alcohol present on the patient unless they just wiped down an area of his body or perhaps spilled the alcohol on the patient or on his bed. O2 could have been leaking under the gown and bedding.
Really a horrible tragedy, especially during the holidays.
What you suggest would be a gross breach of patient safety guidelines and amount to malpractice. Alternatively, there is a theory that chronic illness and liver dysfunction can lead to an abnormal level of acetone that makes the body itself combustible.