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Table 1 Secondary Signs of PTXs Identified on Supine AP chest Xray

From: Occult pneumothorax, revisited

 

Group 1

Group 2

Group 3

Deep sulcus

7

9

3

Crisp cardiac silhouette

1

1

0

Pleural line

1

0

1

  1. Adapted from Ball et al. from reference [21].