The emergency room nurse is assigned the following clients at the beginning of their shift. Which client does the nurse see first?

Choice A reason: Atelectasis is the collapse of alveoli, causing reduced lung volume and hypoxemia, often due to obstruction or compression. It does not cause paradoxical chest movement (inward during inspiration, outward during expiration). The symptoms and physical findings described are more consistent with mechanical chest wall instability, not alveolar collapse.

Choice B reason: Flail chest occurs when multiple rib fractures create a free-floating segment of the chest wall, causing paradoxical movement: inward motion during inspiration and outward during expiration. This impairs ventilation, leading to dyspnea and pain, as described. It is a critical injury requiring stabilization and possibly mechanical ventilation to restore effective breathing.

Choice C reason: Hemothorax involves blood accumulation in the pleural space, causing lung compression and dyspnea. It does not produce paradoxical chest movement, as the chest wall remains intact. The symptoms of dyspnea and pain may occur, but the specific physical finding of paradoxical motion points to flail chest, not hemothorax.

Choice D reason: Pneumothorax is air in the pleural space, causing lung collapse and dyspnea. It may cause reduced chest movement on the affected side but not paradoxical movement, which requires chest wall instability. The described inward inspiration and outward expiration are characteristic of flail chest, not pneumothorax, despite similar symptoms like pain.

Choice A reason: Blood pressure of 110/70 mm Hg is within normal range and does not indicate hypovolemic shock, which typically presents with hypotension (e.g., <90/60 mm Hg). Early shock may have normal blood pressure, but tachycardia (heart rate 120 beats/min) is a more sensitive indicator of compensatory response to volume loss.

Choice B reason: Heart rate of 120 beats/min indicates tachycardia, a hallmark of hypovolemic shock. In trauma, blood loss reduces circulating volume, triggering sympathetic activation to increase heart rate, compensating for decreased cardiac output. This is the most indicative finding, as it appears early and reflects the body’s response to hypovolemia.

Choice C reason: Warm, dry skin is not typical of hypovolemic shock, which causes cool, clammy skin due to vasoconstriction from sympathetic activation. Warm skin may occur in distributive shock (e.g., sepsis). Tachycardia is a more specific indicator of hypovolemia, making this finding incorrect for the suspected condition.

Choice D reason: Urine output of 40 mL/hr is within normal range (30-50 mL/hr) and does not indicate hypovolemic shock, which typically reduces output (<30 mL/hr) due to decreased renal perfusion. Tachycardia (120 beats/min) is a more immediate and sensitive sign of hypovolemia, making urine output less indicative in early shock.