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Rigid endoscopes have the advantage that they may be inserted through the mouth of a
patient who is too sensitive to allow a mirror to be used. In addition they usually offer
some amplification, allowing a more detailed inspection of the larynx. In general, they
provide the same inspection possibilities as a larynx mirror.
To obtain maximum illumination an integral flexible light cable should be used, though a
desire for robustness is better served by a detachable light cable, such as AE 6100
included. The Flexible Light Cable AE 6100 may be connected to ACM devices by means
of the B & K to ACM female converter WA 0350.
4.3.
FLEXIBLE FIBRESCOPE
Flexible fibrescopes have, in principle, been available for decades. However, over the
last few years, the quality and durability of these devices have improved and they are
rapidly finding increased use in laryngoscopy as well as in other fields.
They are normally inserted through the nose, and since their tip may be twisted by an
outside handle practically all corners of the major head and neck cavities can be ob-
served. Since fibrescopes are not applied through the mouth, even very sensitive per-
sons can be examined without difficulty.
The fibrescopes of interest are mainly either the bronchoscopes, which provide a very
clear and well illuminated view, or the simpler and thinner nasopharyngo-fibrescopes
which provide useful views even through the narrow nasal cavities of small children (Ref.
2).
The Light Output Coupler DB 2632 is used for the Olympus range of fibrescopes. A
locking ring is supplied to hold the old range of gastroscopes. For the latest range of
gastroscopes and for the thin fibrescopes the ring is omitted.
4.4.
OPERATION MICROSCOPE
Operation microscopes have become very popular for detailed examination of vocal
cord motion and need both fixed and stroboscopic illumination.
For microscopes already equipped with fibre optic light several possibilities may be
available. If the microscope light cable is long enough it may be fitted to the Strobo-
scope LIGHT Output by means of one of the Couplers supplied. Another possibility is to
fit the B & K Flexible Light Cable directly into the microscope (a from B & K to Zeiss plug
is available as WA 0349). A longer light cable may be ordered from the microscope
manufacturer if the one supplied is not long enough. Finally, it may be possible to fit the
B & K Flexible Light Cable to the microscope light cable.
A further alternative, involves replacing the lamp housing of the operation microscope
by an adaptor. This permits light from the Light Cable of the Type 4914 to be directed
into the optical system of the microscope.
Microscope Adaptor WA 0362 is supplied by B & K Systems Department for Zeiss opera-
tion microscopes with an aluminium lamp housing. For Zeiss operation microscopes with
plastic lamp housing the Adaptor WA 0363 (B
&
K Systems Department) may be used.
For other operation microscopes with similar lamp housings the Adaptor Subassembly
WA 0364 (B & K Systems Department) may be installed in the original lamp housing.
17
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