Sources: A Manual Of Peroral Endoscopy And Laryngeal Surgery
No hook greater than a right angle should be used through
endoscopic tubes; for should it become caught in some of the smaller
bronchi its extraction might result in serious trauma. The half curved
hook shown in Fig. 38 is the safest type; better still, a spiral twist
to the hook will add to its uses, and by reversing the turning motion
it may be unscrewed out if it becomes caught. Hooks may easily be
made from rods of malleable steel by heating the end in a spirit lamp
and shaping the curve as desired by means of a pin-vise and pliers.
About 2 cm. of the proximal end of the rod should be bent in exactly
the opposite direction from that of the hook so as to form a handle
which will tell the position of the hook by touch as well as by sight.
Coil-spring hooks for the upper-lobe-bronchus (Fig. 39) will reach
around the corner into the ascending bronchus of the
upper-lobe-bronchus, but the utmost skill and care are required to
make their use justifiable.
[FIG. 39.--Author's coil-spring hook for the upper-lobe, bronchus]