Author Question: What type of instrument could be used to analyze pH, PO2, PCO2, and various electrolytes at the ... (Read 42 times)

@Brianna17 · **on:** Jul 16, 2018

What type of instrument could be used to analyze pH, PO2, PCO2, and various electrolytes at the patient's bedside?

a. Point-of-care blood gas analyzer c. Potentiometer
b. CO-oximeter d. Capnograph

Question 2

Which of the following statements are true concerning in vivo arterial blood gas analyzers?

a. They incorporate a polarographic elec-trode.
b. The operating principle is light transmis-sion.
c. Temperature correction is unnecessary.
d. They are more accurate than in vitro blood gas analyzers.

dajones82 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: A
Point-of-care testing typically involves the use of portable devices that can be located at or near the point of patient care. These devices are not only portable but also lightweight, allowing in vitro arterial blood gas and pH measurements to be made in the emergency department, intensive care unit, physician's office, or a transport vehicle.

Answer to Question 2

ANS: B
In vivo arterial blood gas monitors use optical sensors and fiberoptic technology for light trans-mission through the sensors. Polarographic electrodes are not used in vivo. In many cases, tem-perature corrections might be required because the sensor may be in a peripheral artery, where the measured temperature might not equal the patient's core temperature. Correlations may not be as good for PCO2 and PO2 as they are for pH and therefore may be less accurate than in vitro blood gas analyzers.