Retrotracheal space
Maximal diameter at C5
Radiography (Lateral)
0-1 y/o 2.0 cm
1-2 y/o 1.5 cm
2-14 y/o 1.2 cm
Hay PD, Jr. The Neck: A roentgenological study of the soft tissues: Consideration of the normal and pathological. III. Normal necks (infants and children). Ann Roentgenol Vol 9. New York: Hoever, 1930, p22.
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