Final answer:
When monitoring a client with a spinal cord injury for GI complications, nurses should look for hematest-positive nasogastric tube drainage, as it indicates gastrointestinal bleeding, a critical acute complication.
Step-by-step explanation:
The nurse caring for a client with a spinal cord injury should monitor for gastrointestinal (GI) complications, which can include a range of symptoms due to the potential impact on the autonomic nervous system. One key sign the nurse would assess for is hematast-positive nasogastric tube drainage, which would indicate bleeding in the gastrointestinal tract. A flattened abdomen may not necessarily signal a GI complication, as it does not specifically indicate bleeding or dysfunction. Hyperactive bowel sounds could suggest GI motility issues, but they are not direct indicators of GI bleeding or severe complications. Finally, a history of diarrhea might be relevant to the patient's case but, in itself, is not a primary monitoring factor for acute complications within 48 hours post-injury.