Table 1. Surgical field grading system.
| Grade | Relation with sight of 1st rib | Relation with surgery |
|---|---|---|
| Good | More than half of the 1st rib visible | Easy to grasp the bleb region with the stapler |
| Fair | Less than half of the 1st rib visible | Need some manipulation to grasp the bleb region with the stapler |
| Poor | 1st rib not visible | Unable to grasp the bleb region without several manipulations |
Example images are presented in Figure 2.