Table 1
Perforation rates by direction (
N
= 60).
Grade
Perforation Rate, %
Perforation Direction,
n
Lateral
Medial
Cranial
Caudal
1 or 2 or 3
13.0%
8
3
2
1
2 or 3
4.6%
1
1
2
1
3
0.9%
1
0
0
0