2] Biopsies via trans-nasal approach
The other technique for biopsies involves using a flexible endoscope(RZ flexible endoscope with instrumental (internal) side channel,
4.2 mm, Germany) with a working channel through which a small flexible
biopsy forceps can be passed(figure 3). After topical anasthesia to the
nose and larynx, the scope is advanced to a position with the lesion in
view and a 1.8-mm flexible cup biopsy forceps is passed through the
working channel by an assistant until visible 1 to 2 cm beyond the tip
of the scope. The forceps are then opened and the scope is advanced
until the forceps come into contact with the lesion. The forceps are
then closed and removed from the scope. The scope can be left in place
and multiple biopsies can be taken.