Answer to Question 1
3
Rationale: Clients to undergo barium enema must cleanse the bowel before the procedure in order to get adequate visualization, so they are generally instructed to eat a low-residue or clear-liquid diet for 2-3 days before the procedure, take laxatives the evening before and possibly the morning of the procedure, and remain NPO after midnight. Cleansing of the bowel after the procedure is important to prevent a barium bowel obstruction, and can be accomplished using an enema or laxative suppository. Exact orders vary by facility.
Answer to Question 2
1,2,3,4
Rationale: Electrolytes, including sodium, control and regulate water balance