Tension grading of decompression window of bone flap

1, level 1: feeling of touching lips, indicating low tension of bone window. After the bone flap is taken out, the doctor will feel a certain relaxation by gently touching the part.

2. Grade II: nasal sensation, and the tension of bone window belongs to medium level. After the bone flap is taken out, the doctor will feel resistance and tightness when he gently touches the part.

3. Level 3: The feeling of touching the forehead indicates that the bone window is highly tense. When the bone flap is removed, the tension at the spoon incision and the pressure to prevent further cutting can be obviously felt.