Necrosis depth
The depth of scar tissue produced by thermal injury is used as the
standard for the necrosis depth during tonsillectomy. The mean necrosis
depth in HS group was 767.5μm. In coblation group, the mean necrosis
depth was 447.1μm. In CD group, there was a little inflammatory cell
infiltration in the tonsil tissue without thermal injury, but the
interstitial edema was severe, and small blood vessels were
dilated(Figure 4). The necrosis depth was statistically different
between three groups(p < 0.05)