| dc.description.abstract | This is a cross sectional study that aims to describe
the distribution of heights of lateral lamella of
ethmoid bone according to Keros classification. All
available CT scans at ENT unit, Teaching Hospital
Anuradhapura were reviewed. Heights of the
lateral lamellae on both sides were measured, and
classified according to Keros classification. Fiftyone
CT Scans were analysed. The mean height
of right lateral lamella was 5.16mm (SD 1.6) and
of left lateral lamella was 5.06mm (SD1.7) (No
significant difference (P=0.418)). Mean height on
right side in males was 5.25mm (SD 1.37), and
in females was 5.06mm (p=1.96) (No significant
difference (p=0.696)). Mean height on left, for
males was 5.01mm (SD 1.43) and for females it
was 5.11mm (SD 2.04),(No significant difference.
(p=0.854)). Keros type I was seen in 12 (24%) each
on both sides. Keros type II were seen in 31 (62%)
on right and 32 (62%) on left. There were 7 (14%)
with Keros III on right side and 6 (12%) on left
side. Over 60% of Sri Lankans are likely to be in
Keros II. Risk of intracranial entry during nasal
surgery among Sri Lankans is likely to be similar
to that of western population. | en_US |
