A patient develops increasing dyspnea and hypoxemia 2 days after heart surgery. What procedure should the nurse anticipate assisting with to determine whether the patient has acute respiratory distress syndrome (ARDS) or pulmonary edema caused by heart failure?

Insertion of a pulmonary artery catheter

Obtaining a ventilation-perfusion scan

Drawing blood for arterial blood gases

Positioning the patient for a chest x-ray

Answer and Explanation

The Correct Answer is A

A. The insertion of a pulmonary artery catheter can help in assessing hemodynamic parameters and distinguishing between these two conditions. It provides direct measurement of pulmonary artery pressures, which can be elevated in the case of heart failure.

B. A ventilation-perfusion (V/Q) scan is used to evaluate ventilation and perfusion in the lungs. While it can help identify areas of ventilation-perfusion mismatch, it may not be the most appropriate initial test for distinguishing between ARDS and pulmonary edema.

C. Drawing blood for arterial blood gases is also a critical step as it helps in assessing the severity of hypoxemia and respiratory failure.

D. A chest x-ray can show the presence of bilateral opacities, which are indicative of ARDS when cardiac failure or fluid overload is not the primary cause. However, transthoracic echocardiography (TTE) is often performed to seek evidence of cardiac dysfunction when cardiogenic pulmonary edema cannot be excluded by clinical evaluation, laboratory findings, or imaging.

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Correct Answer is C

Explanation

C. This allows for the patient's condition to be re-evaluated, ensuring that they receive the necessary care and attention before being transferred.

A. Benzodiazepines can cause sedation, cognitive impairment, and delirium, which may worsen the patient's condition. Canceling the transfer without addressing the underlying cause of confusion may delay appropriate management.

B. Restraints can increase agitation, anxiety, and risk of injury, and they do not address the underlying cause of confusion. Restraints should only be considered as a last resort if all other measures to ensure patient safety have been exhausted.

D. This option is not appropriate because transferring the patient without addressing the new-onset confusion could compromise patient safety. It's essential to identify and manage the underlying cause of confusion before transferring the patient to another unit.

A. Respiratory rate B. Stroke volume C. Heart rate D. Blood pressure

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).

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A patient develops increasing dyspnea and hypoxemia 2 days after heart surgery. What procedure should the nurse anticipate assisting with to determine whether the patient has acute respiratory distress syndrome (ARDS) or pulmonary edema caused by heart failure?

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Naxlex Comprehensive Predictor Exams

An 81-yr-old patient who has been in the intensive care unit (ICU) for a week is now stable and transfer to the progressive care unit is planned. On rounds, the nurse notices that the patient has new onset confusion. What should the nurse plan to do?

Correct Answer is C

Explanation

Which of the following factors can directly affect cardiac output?

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

Explanation

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