When should the nurse conduct an Allen's test?

The correct answer is Choice D

Choice A rationale: Splinting with a pillow may reduce discomfort during movement or coughing by stabilizing the incision site, but it does not address acute postoperative pain with sympathetic overdrive. The elevated heart rate, respiratory rate, and blood pressure suggest a stress response mediated by catecholamines. Without analgesia, nociceptive signals continue to activate the hypothalamic-pituitary-adrenal axis. While splinting is supportive, it lacks the pharmacologic efficacy needed to blunt nociceptive transmission at the spinal or supraspinal level.

Choice B rationale: Assessing IV patency is a procedural prerequisite for medication administration but not a therapeutic intervention in itself. It does not directly address the pathophysiology of acute pain or the sympathetic surge evidenced by tachycardia and hypertension. Pain activates ascending pathways via A-delta and C fibers, requiring pharmacologic blockade. IV access assessment is necessary but secondary to the urgent need for analgesia to prevent complications like hypoxia, hyperventilation, or delayed recovery.

Choice C rationale: High Fowler positioning may improve diaphragmatic excursion and reduce pulmonary complications, but it does not mitigate visceral or incisional pain. In fact, increased intra-abdominal pressure from upright posture may exacerbate pain at the surgical site. Pain perception involves central sensitization and peripheral nociceptor activation, which are unaffected by positioning. The client’s pale skin and elevated vitals indicate systemic distress requiring analgesic intervention, not postural adjustment. Thus, this choice lacks direct analgesic benefit.

Choice D rationale: IV analgesics act rapidly to inhibit nociceptive transmission at the spinal cord and brainstem levels. Opioids bind to mu receptors, reducing neurotransmitter release and hyperpolarizing neurons, thereby dampening pain signals. This intervention directly targets the physiologic cause of elevated heart rate, respiratory rate, and blood pressure. Normal heart rate is 60–100 bpm, respiratory rate 12–20 breaths/min, and BP <120/80 mmHg. Prompt analgesia prevents complications like hypoxia, delayed healing, and neuroendocrine stress

Choice A rationale: Hypoxic-ischemic injury from submersion can lead to delayed cerebral edema. Monitoring is critical as the brain's inflammatory response to the initial insult often peaks several hours after the event.

Choice B rationale: Asphyxia is the initial event that occurred in the pool. By the time the child is admitted to the pediatric floor, the asphyxiation event has passed; the nurse now monitors for its aftereffects.

Choice C rationale: Near-drowning victims are more likely to experience hypotension due to myocardial depression or shifting fluid balances. Hypertension is not a typical expected complication in the immediate post-submersion recovery period.

Choice D rationale: Aspiration of water interferes with surfactant production and damages alveolar membranes, leading to pulmonary edema or ARDS. Respiratory status can deteriorate rapidly 6 to 8 hours after the initial insult.

Choice E rationale: The child was in cool water with an outdoor temperature of 64°F, making hypothermia the primary concern. Hyperthermia is not expected unless a secondary infection or a thermregulation failure occurs much later.

Choice F rationale: The head CT scan was negative for bleeding. Without a significant traumatic impact or pre-existing condition, a subdural hemorrhage is not a standard complication resulting from a submersion injury.