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. 2018 Aug;10(8):5057–5065. doi: 10.21037/jtd.2018.07.79

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.