2. • Endoscopy means looking inside the body for
medical reasons using an endoscope
(instrument).
• Otoendoscopy is the endoscopy of the ear
which involves placing a rigid endoscope into
the ear to examine both the exterior and
middle portions of the ear.
3. Oto-endoscope
• An Otoendoscope is a short
rigid telescope usually of 10cm
length and varying diameters-
1.7, 2.7, 3.4mm.
• It is available in 0, 30, 45, 70
degree angles.
• It has to be connected to a
fiberoptic light source for
illumination.
• The findings can be recorded
through a camera.
• COMMONLY USED are 1.7mm 0˚
& 30˚
4. Types of Oto-Endoscopes
0 degree endoscope-The intact eardrum can
be examined closely and the movement of the
ear drum evaluated.
5. 30 degree endoscope- It can sometimes be
passed through a perforated ear drum
-to determine the INTEGRITY of the tiny bones
in the middle ear
-to DIAGNOSE disease in the hidden areas of
the middle ear.
Sinus tympani, facial recess and eustachian
tube are VISUALIZED.
6. 45 degree
70 degree- The sinodural angle can be
evaluated.
7.
8. Uses
1) The rigid photograph endoscopes
have also been used for
endoscopic transcanal myringoplasty.
2) The endoscope is passed through the perforated
ear drum to visualize the status of ossicles,
eustachian tube orifice, tympanic membrane and
the middle ear mucosa.
3) It can be used to remove tissue for
biopsy.
9. Procedures performed
oRemoval of granulations by crocodile forceps and
suction
oRemoval of epithelial debris
oRemoval of otomycotic flakes
oRemoval of residual cholesteatoma
oRemoval of foreign bodies
oRemoval of aural polyps
oRemoval of necrosed meatal flaps
oLowering of high facial ridge under local
anaesthesia
oPromotion of epithelization by application of
gentian violet to the cavity in case of delayed onset
of epithelization
10. Advantages
Visualizes the whole tympanic membrane and
the ear canal without having to manipulate the
patient’s head or the microscope.
Extends the operative field in the transcanal
procedures into structures usually hidden under the
microscope
Visualizes structures from multiple angles as
opposed to the microscope’s single axis along the
ear canal.
Provides extremely sharp image with high
resolution
11. Anatomical variations that hamper the view of
entire tympanic membrane during ear surgery are
overcome by otoendoscopy
Operative time and post-operative pain as
well as morbidity are LESS
NO auricular displacement or numbness (a
common side effect of post-auricular incision)
12. Disadvantages
Fogging the lens of the endoscope, but this can
easily be handled by using an antifog solution
Smearing of blood on the tip of an
otoendoscope during any procedures.
