What size suction catheter is appropriate for use in a patient with a 7-mm ET tube?
a. 8 Fr
b. 10 Fr
c. 12 Fr
d. 14 Fr
ANS: B
Multiply the ET tube size by 3; this converts the ET size to French units (Fr). Then divide the re-sult by 2, for a size that is half or less of the ET diameter.
Health Professions
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