In assessing patients receiving tube feedings, the nurse must be alert for the following assessment findings? (Select all that apply)

Amount of formula actually taken in by the client

Change tubing and irrigation kit every 4 hours

Check gastric residual volume before each feeding or, in the case of continuous feedings, every 4 hours

Tube placement, head of bed elevated 30-45 degrees, and formula flow rate

Weekly weights and clinical responses, as noted in laboratory findings