Semi-circular design provides
maximum pressure protection while
patient is in supine position.
SK-27, 27-4 can be used under the
knee, the foot against the board.
While patient is in lateral position,
SK-27 can be used for the shoulder
protection.
In thyroidectomy , SK-27-4 is used for
neck hyperextension.
while patient is in prone position SK-
27-1, SK-27-2 can be used under the
chest.