What size suction catheter is appropriate for use in a patient with a 6-mm ET tube?

Name: What size suction catheter is appropriate for use in a patient with a 6-mm ET tube?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Multiply the ET tube size by 3;this converts the ET size to French units (Fr).Then divide the result by 2,for a size that is half or less of the ET diameter.In this case,the answer is 9;therefore,round down to the lower size so as not to obstruct more than 50% of the ET tube during suctioning.

What Size Suction Catheter Is Appropriate for Use in a Patient