While checking a polarographic (Clark) electrode, you determine that the device fails to read 100% when exposed to pure O2. Which of the following actions would be the proper first step?
a. Check the silica crystals.
b. Send the device out for repair.
c. Replace the analyzer's batteries.
d. Change the analyzer's fuel cell.
ANS: C
Because a low battery condition is so common with Clark electrode systems, the first step in troubleshooting is to replace the batteries.
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Indicate whether the statement is true or false
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Traditionally, what percentage of a given dose of aerosolized medication reaches the lower respiratory tract, regardless of the type of delivery device being used?
a. 5% to 10% b. 10% to 15% c. 20% to 30% d. 40% to 50%
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