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Table 3 Sizing polyvinyl chloride double-lumen tubes [63]

From: Clinical review: Independent lung ventilation in critical care

Tube size (F)

Circumference (mm)

Lumen diameter (mm)

Indication

35

38.0

5.0

Pediatrics

37

40.0

5.5

Small adults

39

44.0

6.0

Medium adults, usual female size

41

45.0

6.5

Large adults, usual male size