Table 1 Quality of the intraoperative surgical field during functional endoscopic sinus surgery

0–1

No bleeding; excellent to outstanding surgical conditions

2–3

Slight bleeding; surgery fairly easy. No stops for hemostasis and/or suctioning are required

4–5

Slight bleeding; surgery mildly difficult. One stop for hemostasis and/or suctioning is required

6–7

Moderate bleeding; surgery moderately difficult. Occasional stops for hemostasis

8–9

Moderate to severe bleeding; surgery very difficult. Multiple stops for hemostasis

10

Surgery terminated due to severe bleeding in the surgical field