A patient is admitted to the intensive care unit after a motor vehicle accident. On the second day of hospital admission, the patient develops acute renal failure. The patient is hemodynamically unstable, but renal replacement therapy is needed to manage the patient's hypervolemia and hyperkalemia. Which of the following therapies will the patient's hemodynamic status best tolerate?

When assessing a client with suspected ventilatory failure, potential indicators include decreased PaO2, increased heart rate, and increased PaCO2.

A. Decreased PaO2 is a key indicator of ventilatory failure. The client’s PaO2 levels of 60 mmHg at 1030 and 55 mmHg at 1200, compared to the reference range of 75-100 mmHg, show impaired oxygen exchange, reflecting inadequate ventilation. This aligns with the client’s low oxygen saturation (88% and 85%) and symptoms like dyspnea and accessory muscle use, indicating respiratory distress.

B. Increased heart rate is another indicator. The client’s heart rate rose from 110/min at 1030 to 115/min at 1200, above normal ranges, suggesting a compensatory response to hypoxia and respiratory distress. This tachycardia, coupled with symptoms like fatigue and difficulty speaking, supports ventilatory failure as the body attempts to meet oxygen demands, aligning with Maslow’s physiological needs for oxygenation.

C. High oxygen saturation is not an indicator of ventilatory failure. The client’s oxygen saturation is low (88% at 1030, 85% at 1200), which is consistent with ventilatory failure, not high saturation. High oxygen saturation would suggest adequate oxygenation, contradicting the client’s clinical presentation of wheezing, decreased breath sounds, and low PaO2.

D. Increased PaCO2 is a hallmark of ventilatory failure. The client’s PaCO2 levels of 54 mmHg at 1030 and 58 mmHg at 1200, above the reference range of 35-45 mmHg, indicate CO2 retention due to inadequate ventilation. This, along with the client’s respiratory acidosis (pH 7.32 and 7.30) and symptoms like increased respiratory rate and fatigue, confirms ventilatory failure.

Choice A reason: Pain medication is important for burn patients due to severe pain from exposed nerve endings. However, in the ABCDE approach, circulation (fluid status) takes precedence over pain management. A 30% burn causes significant fluid loss, risking hypovolemic shock, making IV fluids the priority to stabilize the patient before addressing pain.

Choice B reason: A 30% burn injury to the lower extremities causes significant plasma leakage, leading to hypovolemia and potential shock. Administering IV fluids, typically via the Parkland formula, restores intravascular volume, maintains blood pressure, and ensures organ perfusion. In the ABCDE approach, circulation is prioritized, making fluid resuscitation the first intervention.

Choice C reason: Cleaning and dressing burn wounds prevent infection, a major complication due to loss of the skin barrier. However, this is not the immediate priority in the acute phase. Fluid resuscitation addresses life-threatening hypovolemia first, as per the ABCDE approach, ensuring circulatory stability before wound care is initiated.

Choice D reason: A tetanus booster prevents infection from Clostridium tetani, especially in contaminated burns. While important, it is not the first priority in the acute management of a 30% burn. Fluid resuscitation addresses immediate life-threatening hypovolemia, which takes precedence over prophylactic measures like tetanus vaccination in the ABCDE framework.