Table 1 Grades of pectus bar displacement

1

(Mild)

There is no displacement of the bar.

Or

Displacement of the bar has occurred but there are no external morphologic changes.

2

(Moderate)

Displacement of the bar and external morphologic changes have occurred but correction of the bar displacement is not necessary.

3

(Severe)

Displacement of the bar and external morphologic changes have occurred and correction of the bar displacement is necessary.

4

(Urgent)

Displacement of the bar has occurred and resulted in compression of the intrathoracic organs, high risk of organ injury, or abnormal EKG. Urgent correction of the bar displacement should be performed.