The nurse is caring for a client who fell while walking to the bathroom. Upon transfer to the intensive care unit, the client is provided with a history of vomiting twice. Which intervention should the nurse implement first?

Choice A reason: Rebound tenderness in the right lower quadrant (McBurney’s point) is a hallmark of appendicitis, indicating peritoneal irritation from an inflamed appendix. This localized pain, elicited on palpation release, is highly specific, guiding urgent surgical evaluation to prevent rupture and peritonitis.

Choice B reason: Diffuse abdominal pain is nonspecific and occurs in various conditions, not uniquely appendicitis, which typically presents with localized right lower quadrant pain. Rebound tenderness is more diagnostic, as it directly reflects appendiceal inflammation, making it the priority finding.

Choice C reason: Decreased bowel sounds may occur in appendicitis due to ileus but are nonspecific, seen in other abdominal conditions. Rebound tenderness is more indicative, as it localizes to the appendix, confirming peritoneal irritation, critical for diagnosing acute appendicitis.

Choice D reason: Elevated blood pressure is not specific to appendicitis and may reflect pain or stress. Rebound tenderness directly indicates appendiceal inflammation, making it the most reliable finding, as it guides diagnosis and urgent intervention to prevent complications like perforation.

Choice A reason: Huff coughing clears airway secretions but is less urgent than assessing oxygenation in acute dyspnea. COPD exacerbations reduce oxygen saturation, risking hypoxia. Pulse oximetry confirms the severity, guiding interventions, as coughing techniques are secondary to ensuring adequate oxygenation.

Choice B reason: Humidification prevents airway drying during oxygen therapy but does not address immediate dyspnea or hypoxia. Pulse oximetry is prioritized to assess oxygenation status in COPD exacerbation, as low oxygen levels require urgent intervention, making humidification a secondary consideration.

Choice C reason: Nebulizer treatments, like albuterol, relieve bronchospasm but require confirmation of hypoxia severity. Pulse oximetry assesses oxygen saturation, guiding whether nebulization or oxygen is needed. In acute COPD exacerbation, oxygenation status is critical to prioritize before administering treatments.

Choice D reason: Pulse oximetry measures oxygen saturation, critical in COPD exacerbation with dyspnea and tachypnea. Low saturation indicates hypoxia, guiding oxygen therapy or bronchodilator use. This objective data is the next priority after positioning, as it directs immediate interventions to prevent respiratory failure.