The nurse explains to a patient that the pulse oximeter can measure the arterial oxygen by:
measuring the oxygenated hemoglobin through a capillary bed.
assessing the amount of blood passing through the sensor.
assessing the relative warmth of the skin on the monitored part.
measuring the respirations to the blood pressure via infrared rays.
The Correct Answer is A
A. Pulse oximetry works by using light absorption to measure the oxygen saturation of hemoglobin in the blood, which typically occurs through the capillary bed in areas like the finger or earlobe.
B. The pulse oximeter does not measure the amount of blood passing through the sensor directly, but rather the oxygen content of the blood.
C. The pulse oximeter does not assess the warmth of the skin as a mechanism for measuring oxygenation.
D. Pulse oximeters measure oxygen saturation levels, not the respiratory rate or blood pressure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Temperature often decreases in cases of severe blood loss due to shock and hypothermia.
B. A decrease in pulse is unlikely in severe blood loss. The body compensates with an increased heart rate.
C. A decrease in blood pressure is expected in cases of significant blood loss, as the body struggles to maintain adequate circulation.
D. Respirations may increase in response to blood loss, not decrease, as the body attempts to increase oxygen intake.
Correct Answer is B
Explanation
A. While auscultating lung and abdominal sounds is important, it is not as urgent as checking neurological function in a head trauma patient.
B. Assessing verbal and motor responses is critical to evaluate the level of consciousness and neurological function in a patient with head trauma.
C. Monitoring daily weight is not an immediate concern for a patient with possible head trauma.
D. Monitoring intake and output is important but not the priority compared to assessing the neurological status in head trauma patients.
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