The son of a 73-year-old woman has called 911. The patient i…

The son of a 73-year-old woman has called 911. The patient is confused and exhibiting out-of-character behavior. The son informs you that she is a diabetic, and takes pills and not injectable insulin. Assessment reveals adequate breathing, skin that is cool, and a radial pulse that is rapid and weak. Based on this history, you should be suspicious of: