A patient with respiratory failure has a respiratory rate of 26 breaths/min and an oxygen saturation (SpO2) of 80%. The patient is increasingly pale and restless but follows commands. Which intervention will the nurse anticipate?

Initiation of continuous positive pressure ventilation (CPAP)

Endotracheal intubation and positive pressure ventilation

Insertion of a mini-tracheostomy with frequent suctioning

Administration of 100% O2 by non-rebreather mask

Answer and Explanation

The Correct Answer is B

B. Endotracheal intubation and positive pressure ventilation are indicated in patients with respiratory failure who are unable to maintain adequate oxygenation or ventilation with non-invasive interventions. Intubation allows for the delivery of positive pressure ventilation, oxygenation, and airway protection. It also facilitates the clearance of secretions and administration of medications. Given the patient's severe hypoxemia, impending respiratory distress, and deteriorating condition, endotracheal intubation and positive pressure ventilation are the most appropriate interventions to ensure adequate oxygenation and prevent further deterioration.

A. CPAP is a non-invasive ventilation modality that provides a continuous positive pressure to the airways throughout the respiratory cycle. While CPAP may be beneficial in certain cases of respiratory failure, it may not be sufficient for a patient with severe hypoxemia (SpO2 of 80%) and impending respiratory distress. CPAP is typically indicated for patients with conditions such as obstructive sleep apnea or mild to moderate respiratory failure.

C. Mini-tracheostomy may be considered in certain cases of upper airway obstruction or inadequate airway clearance. However, in this scenario, the patient's hypoxemia is likely due to severe respiratory failure rather than upper airway obstruction. While suctioning may be necessary to clear secretions, it does not address the underlying cause of hypoxemia or provide ventilatory support.

D. While administration of supplemental oxygen is important in the management of hypoxemia, a non- rebreather mask may not be sufficient for a patient with severe hypoxemia and impending respiratory distress. Non-rebreather masks can deliver high concentrations of oxygen but may not provide adequate positive pressure support or airway protection. In this case, endotracheal intubation and positive pressure ventilation are more appropriate to ensure adequate oxygenation and ventilation.

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Correct Answer is ["B","C"]

Explanation

B. stroke volume is the amount of blood ejected from the left ventricle with each contraction (systole) of the heart. Changes in stroke volume directly affect cardiac output. An increase in stroke volume leads to an increase in cardiac output, while a decrease in stroke volume results in a decrease in cardiac output. Factors that can affect stroke volume include preload, afterload, and contractility of the heart.

C. Heart rate refers to the number of heartbeats per minute. Heart rate directly affects cardiac output by determining how frequently the heart contracts and pumps blood. An increase in heart rate (tachycardia) leads to an increase in cardiac output, while a decrease in heart rate (bradycardia) results in a decrease in cardiac output. Factors such as sympathetic and parasympathetic nervous system activity, hormones, and medications can influence heart rate.

A. Respiratory rate does not directly affect stroke volume or heart rate but changes in respiratory rate can indirectly impact cardiac output through their effects on venous return and preload.

D. Blood pressure represents the force exerted by the blood against the walls of the arteries. While blood pressure does not directly affect cardiac output, it is influenced by cardiac output and systemic vascular resistance (SVR).

A. Intracranial pressure B. Renal function C. Spinal cord perfusion D. Hemodynamic status

Correct Answer is D

Explanation

D. A pulmonary artery catheter is used to monitor hemodynamic status. It provides valuable information about cardiac function, preload, afterload, and cardiac output. By measuring parameters such as pulmonary artery pressure, pulmonary artery wedge pressure, and central venous pressure, a pulmonary artery catheter helps assess the effectiveness of cardiac function and guide management in critically ill patients, especially those with conditions such as heart failure, shock, or pulmonary hypertension.

A. A pulmonary artery catheter, also known as a Swan-Ganz catheter, is not used to monitor intracranial pressure. Instead, it is primarily used to assess hemodynamic status and cardiac function by measuring parameters such as pulmonary artery pressure, pulmonary artery wedge pressure, central venous pressure, and cardiac output.

B. A pulmonary artery catheter is not used to directly monitor renal function. While changes in hemodynamic status can impact renal perfusion and function, the primary purpose of a pulmonary artery catheter is to assess cardiac function and hemodynamics, rather than renal function.

C. A pulmonary artery catheter is not used to monitor spinal cord perfusion. Although alterations in hemodynamic status can affect spinal cord perfusion indirectly, the main purpose of a pulmonary artery catheter is to evaluate cardiac function and hemodynamics.

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A patient with respiratory failure has a respiratory rate of 26 breaths/min and an oxygen saturation (SpO2) of 80%. The patient is increasingly pale and restless but follows commands. Which intervention will the nurse anticipate?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Which of the following factors can directly affect cardiac output?

Correct Answer is ["B","C"]

Explanation

A nurse is preparing a client for transfer to the ICU for placement of a pulmonary artery catheter. The nurse should explain to the client that this catheter is used to monitor which of the following conditions?

Correct Answer is D

Explanation

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