Soft catheters come in various diameters, using French units (Fr.) of sizing. The larger the French size, the larger the diameter of the suction catheter. One Fr. unit is equal to:
A) 3.3 mm.
B) 33.0 mm.
C) 0.033 mm.
D) 0.33 mm.
Answer: D
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What is the LD 50/30 for humans?
What will be an ideal response?