Author Question: Which is a true statement about blood pressure (BP) measurement? a. BP can be obtained by direct ... (Read 46 times)

Cooldude101 · **on:** Jul 18, 2018

Which is a true statement about blood pressure (BP) measurement?

a. BP can be obtained by direct or indirect methods.
b. BP can be taken on an arm that has an IV.
c. Pressure is higher during diastole and lower in systole.
d. BP readings measure tissue perfusion.

Question 2

Which statement regarding pulse oximetry is false?

a. It measures arterial oxyhemoglobin saturation.
b. A reading of 90 or less is normal.
c. False high readings are found in cigarette smokers.
d. A probe should not be placed over a fingernail with polish.

BUTTHOL369 · **Reply #1 on:** Jul 18, 2018

Answer to Question 1

ANS: A
Blood pressure measures the contraction and relaxation of the heart. Blood pressure is higher in systole than in diastole and is measured in millimeters of mercury; the arm used for measurements should be opposite the one used for IV fluid therapy. Measurement can be direct or indirect, and can be continuous or intermittent.

Answer to Question 2

ANS: B
A pulse oximeter measures arterial oxyhemoglobin saturation. The pulse oximeter reading should remain over 95; cigarette smokers have false high readings because carboxyhemoglobin (carbon dioxide), which closely resembles oxyhemoglobin, can be perceived by the sensor to be oxygenated. For accuracy, avoid placing the sensor over an area with fingernail polish.