A normal finding when examining thoracic expansion is separation of the thumbs by
a. 2–3 cm on inspiration with return to the midline on expiration.
b. 3–5 cm on inspiration with return to the midline on expiration.
c. 3–5 cm on inspiration and 1–2 cm on expiration.
d. 5–7 cm on inspiration and 3–5 cm on expiration.
B
Thoracic expansion examines the extent of chest expansion and the symmetry of chest wall expansion. The normal distance for the thumbs to separate during thoracic expansion is 3 to 5 cm on inspiration. They should separate an equal amount on inspiration. The thumbs should return to midline when the patient exhales.
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