1. A patient will usually listen to the doctor'sadvice and act on it.
2. Occasionally a patient is so debilitated that he must be fed intravenously.
3. The patient is sedated with intravenous use of sedative drugs.
4. The patient rates the therapies on a scale of zero to ten.
5. The earlier the treatment is given, the better the patient's chances.
6. These gases would seriously damage the patient's respiratory system.