From which stage of non-REM sleep is it most difficult to wake?

The 18-year-old patient presents to the emergency department (ED) complaining of severe pain in the ankle after falling at work. Range of motion in the ankle is decreased and +1 edema is present. On x-ray, the bones of the foot and ankle are intact and the patient is diagnosed with a mild sprain. How does the nurse assess this patient’s pain?

The 78-year-old resident of a nursing home is brought to the emergency department for abdominal pain that is not responsive to oxycodone. She takes captopril, atenolol, lovastatin, and glyburide in addition to the oxycodone. Upon assessment, her abdomen is full and mildly tender. She has positive bowel sounds and reports passing gas but no stools for 96 hours. She denies anorexia or vomiting. A digital rectal examination is performed and stool is found in the rectum. The nurse anticipates being ordered to perform which intervention for this patient?