Final answer:
The nurse should implement double voiding in the patient's plan of care to prevent urinary retention.
Step-by-step explanation:
To prevent urinary retention in a patient with a flaccid bladder secondary to a spinal cord injury, the nurse should implement the intervention of double voiding in the patient's plan of care.
Double voiding involves the patient emptying their bladder twice during each voiding, with a short pause between the two voids. This helps to ensure that the bladder is completely emptied, reducing the risk of urinary retention.
By implementing double voiding, the nurse can help prevent complications associated with urinary retention, such as urinary tract infections and bladder distention.