Traditional method of external ear examination by using light source from Bull's lamp and reflected by head mirror. Today, this technique was superseded by using electric or battery operated headlights utilizing Xenon bulb or LED (light emitting diode).
Preliminary external ear examination Correct speculum size selected (largest
under good illuminations, followed by which can fit nicely into the introitus).
gentle palpation to elicit area of local Otoscope being held as shown with the
tenderness. Pinna is being pulled ulna side of little and ring fingers resting
downward in neonates, backward in gently onto the patient's face. Then, the
children, and upward and posteriorly examining eye see through the eyepiece. in adults. Systematic examination of the ear canal
and eardrum performed and findings
This test is usually done clinically by performing siegelisation or by using a pneumatic otoscope while the patient performs valsalva manouevre. Outward bulge is seen when the pressure in the middle ear cleft exceeded the atmospheric pressure (above the opening threshold of the eustachian tube). Similar effect is to be seen upon blowing nasal balloon. The reverse movement (indrawing) is seen upon swallowing with the mouth and nostrils closed; the so called Toynbee manouevre. Modern days technique incorporate otoendoscopy for the sharper image and detecting even the subtle mobility. This figure shows the bulging of eardrum soon after the patient performs valsalva manouevre.
An example of portable otoendoscope with attached camera head and wiewing panel is shown. Research and development in optics and image processing had enable ear canal and the eardrum to be seen more clearly with the advantage of still image capture and archiving for record keeping and documentation purposes.
Vertigo of vestibular origin is made more noticeable with eyes closure and may be felt by palpation. Alternatively, Frenzel glasses with +20 diopter can be used to eliminate visual fixation.
Frenzel glasses in-used (Rechargeable battery-operated with head-band).
Frenzel glasses (hand-held battery operated).
Spontaneous nystagmus is defined as nystagmus occurring without optic fixation: eyes under Frenzel glasses, or eyes open in total darkness or eyes closed. It indicates active vestibular-ocular imbalance.
Reference: Gordon B. Hughes. Textbook of Clinical Otology. ISBN 0-86577-183-9.