Which clinical finding is most indicative of hypoxemic respiratory failure?

PaCO2 greater than 50 mm Hg

Bradycardia

PaO2 less than 60 mm Hg

Peripheral edema

Answer and Explanation

The Correct Answer is C

Choice A reason: PaCO2 greater than 50 mm Hg indicates hypercapnia, characteristic of hypercapnic respiratory failure due to hypoventilation, as seen in COPD or neuromuscular disorders. Hypoxemic respiratory failure is defined by low oxygen levels (PaO2 <60 mm Hg) with normal or low PaCO2, making hypercapnia less relevant.

Choice B reason: Bradycardia is not a primary feature of hypoxemic respiratory failure. Hypoxemia typically causes tachycardia as a compensatory response to low oxygen delivery. Bradycardia may occur in severe, late-stage hypoxia but is not the most indicative finding compared to PaO2, which directly measures oxygenation status.

Choice C reason: Hypoxemic respiratory failure is defined by a PaO2 less than 60 mm Hg, indicating severe impairment in oxygen transfer due to conditions like ARDS or pulmonary edema. This low arterial oxygen level, despite adequate ventilation, is the hallmark finding, requiring urgent intervention to restore tissue oxygenation.

Choice D reason: Peripheral edema suggests fluid overload, often seen in heart failure, which may contribute to pulmonary edema and hypoxemia. However, it is not a direct indicator of hypoxemic respiratory failure. PaO2 <60 mm Hg specifically defines the condition, as it reflects the primary issue of inadequate oxygenation.

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Correct Answer is B

Explanation

Choice A reason: A respiratory rate of 10 breaths/min is slightly below normal (12-20 breaths/min) but may not necessitate a tracheostomy unless accompanied by other factors like airway obstruction or inability to protect the airway. Tracheostomy is typically reserved for prolonged ventilation needs, not isolated low respiratory rates.

Choice B reason: A client requiring permanent ventilation, such as in chronic neuromuscular diseases or severe lung injury, needs a tracheostomy to provide a stable, long-term airway. Unlike endotracheal tubes, tracheostomies reduce complications like vocal cord damage and improve patient comfort, making them the standard for prolonged mechanical ventilation.

Choice C reason: Dyspnea, or shortness of breath, indicates respiratory distress but does not inherently require a tracheostomy. It may be managed with oxygen or non-invasive ventilation. Tracheostomy is indicated for airway obstruction or prolonged ventilation, not transient symptoms like dyspnea, which can have multiple causes.

Choice D reason: Respiratory acidosis, due to elevated CO2 from hypoventilation, may require ventilatory support but not necessarily a tracheostomy. Non-invasive ventilation or temporary intubation may suffice. Tracheostomy is reserved for long-term airway management, making it less relevant for acute acidosis without evidence of prolonged ventilation needs.

A. Administer IV corticosteroids B. Initiate high-flow oxygen therapy C. Prepare for endoscopic retrograde cholangiopancreatography (ERCP) D. Increase IV fluid rate

Correct Answer is B

Explanation

Choice A reason: IV corticosteroids reduce inflammation in conditions like autoimmune pancreatitis, but they do not address acute hypoxemia. Sudden dyspnea and low oxygen saturation (85%) in acute pancreatitis suggest complications like ARDS or pleural effusion, requiring immediate oxygenation. Corticosteroids act slowly and are not the priority for correcting life-threatening hypoxia in this scenario.

Choice B reason: Sudden dyspnea and oxygen saturation of 85% indicate acute hypoxemia, potentially from ARDS or pulmonary complications in pancreatitis. High-flow oxygen therapy increases alveolar oxygen, improving arterial PaO2 and preventing tissue hypoxia. The ABCDE approach prioritizes breathing, making this the first intervention to stabilize the client before addressing underlying causes.

Choice C reason: ERCP diagnoses or treats pancreatic duct obstructions, a potential cause of pancreatitis, but it does not address immediate hypoxemia. Dyspnea and low saturation require urgent oxygen delivery to prevent organ damage. ERCP is a diagnostic or therapeutic procedure, not an acute intervention for respiratory distress in this critical scenario.

Choice D reason: Increasing IV fluid rate supports hydration and perfusion in pancreatitis, preventing hypovolemia. However, it does not correct acute hypoxemia causing dyspnea and low saturation. The ABCDE approach prioritizes breathing, and high-flow oxygen is needed to address the immediate threat of hypoxia, making fluid adjustment a secondary intervention.

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Which clinical finding is most indicative of hypoxemic respiratory failure?

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The critical care nurse recognizes that which of the following conditions may indicate the need for a client to have a tracheostomy?

Correct Answer is B

Explanation

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Correct Answer is B

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