Final answer:
The nurse should first instruct the caregiver to increase the client's fluids to promote bowel movement and prevent constipation.
Step-by-step explanation:
The nurse should first implement the intervention of instructing the caregiver to increase the client's fluids to five 8 ounce glasses per day.
Increasing fluid intake can help soften the stool and promote bowel movement. This intervention is safe and non-invasive, and it addresses the potential issue of dehydration, which can worsen constipation.
Assessing the client's medical record to determine his normal bowel pattern or notifying the healthcare provider and requesting a prescription for a stool softener can be done after implementing the initial intervention of increasing fluid intake.