Wednesday, September 21, 2011

SIGNS OF HYPERINFLATION ON CHEST X-RAY

1. Height of the right lung greater than 29.9 cms.

2. Location of the right hemidiaphragm at or below the anterior aspect of the seventh rib.

3. Flattening of the hemidiaphragm

4. Enlargement of retrosternal space (on lateral chest x-ray)

5. Widening of the sternodiaphragmatic angle and

6. Narrowing of the transverse cardiac diameter.

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- Felson's principles of chest roentgenology by Lawrence Goodman states that "When the right hemidiaphragm lies below the 10th posterior rib, it is diagnosed as hyperinflation". My HOD goes by the statement 2 in the above list. I wonder which of the both is true and if both are true, which is more true?