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 B
Explanation
A. The bell is used to detect low-pitched sounds, but abnormal heart sounds are often high-pitched, requiring the diaphragm.
B. The diaphragm of the stethoscope is best for detecting high-pitched heart sounds, such as murmurs or abnormal rhythms.
C. The diaphragm on top of the gown would create interference and prevent proper auscultation of heart sounds.
D. The bell is used for lower-pitched sounds and is not the best choice for auscultating abnormal heart sounds.
Correct Answer is C
Explanation
A. Keeping the patient on bed rest is appropriate as it conserves energy and helps prevent further heat loss.
B. Providing additional blankets is a correct intervention to warm the patient gradually.
C. Increasing muscle activity is contraindicated because it could cause vasoconstriction and worsen hypothermia, as the body focuses on preserving core temperature.
D. Offering fluids (if permitted) is correct as hydration can help restore normal body temperature regulation.
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