What color are the nitrogen tank and the oxygen tank in the dental office?

Which of the following supports the HPI element, "duration"?

A. Persistent cough B. Cough developed shortly after she choked while eating pistachio nuts C. Cough first presented four days ago D. Terminating with gagging and occasional vomiting last night

Abdominal wall that allows intestinal contents to protrude outside the abdominal cavity; requires surgical intervention to return intestinal contents to the abdominal cavity and repair the abdominal wall

Fill in the blank with correct word.