A client with suspected pulmonary embolism is undergoing a ventilation-perfusion (V/Q) scan. What is the purpose of this imaging test?
To visualize the heart's electrical activity
To assess lung function and oxygenation
To measure blood clotting time
To evaluate kidney function
The Correct Answer is B
A) Incorrect. Visualizing the heart's electrical activity is typically done with an electrocardiogram (ECG), not a V/Q scan.
B) Correct. A ventilation-perfusion (V/Q) scan is used to assess lung function and oxygenation and to detect areas of the lung where blood flow and air ventilation do not match, which can indicate a pulmonary embolism.
C) Incorrect. Measuring blood clotting time is typically done using coagulation tests such as prothrombin time (PT) or activated partial thromboplastin time (aPTT).
D) Incorrect. Evaluating kidney function is not the primary purpose of a V/Q scan.
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Related Questions
Correct Answer is C
Explanation
A) Incorrect. Age can influence the risk of pulmonary embolism, and it tends to increase with age.
B) Incorrect. While younger individuals can develop pulmonary embolism, the risk generally rises with age.
C) Correct. Pulmonary embolism risk is higher in older individuals, particularly those over 60.
D) Incorrect. Age is one of many factors that contribute to the risk of pulmonary embolism.
Correct Answer is D
Explanation
A) Incorrect. Wheezing is a high-pitched whistling sound that occurs during expiration and is not associated with crackling sounds.
B) Incorrect. Rhonchi are continuous low-pitched sounds heard during both inspiration and expiration, usually due to airway obstruction.
C) Incorrect. Stridor is a high-pitched, crowing sound that occurs during inspiration and suggests upper airway obstruction.
D) Correct. Rales, also known as crackles, are crackling or popping sounds heard during inspiration and can be indicative of fluid or inflammation in the lungs, which can occur with pulmonary embolism.
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