Welch Allyn MicroTymp3 - Quick Reference Guide - Manual

Outer ear
External ear canal
Semicircular canals
Epitympanic recess
Incus
Malleus
Tympanic membrane
Tympanic cavity
Vestibule
Endolymphatic
duct and sac
Cochlea
Normal middle ear
Positive middle ear
pressure
• Acute otitis media
PASS–Peak Ya ≥ 0.6 mmho
Low admittance–Normal
peak Ya, abnormal gradient
• Otitis media with effusion
• Tympanosclerosis
Negative middle ear
pressure
• Eustachian tube dysfunction
• Cold, allergies or vigorous sniffing
REFER–Peak Ya < 0.6 mmho
• Middle ear effusion
Low admittance–Low peak Ya
• Otitis media with effusion
• Tympanosclerosis
• Cholesteatoma
• Middle ear tumor
Flat tympanogram–
Normal ear canal volume
• Middle ear effusion
RETEST–Try again!
High admittance–High peak Ya
• Tympanic membrane
abnormalities
• Ossicular disruption
Flat tympanogram–
Increased ear canal volume
• Patent tympanostomy tube
• Perforated tympanic membrane
-400 -200 0 200
2
0.5
0
1.0
1
1.5
PRESSURE - daPa
Ya - mmho
Vea
+200
RIGHT EAR
R
-400 -200 0 200
2
0.5
0
1.0
1
1.5
PRESSURE - daPa
Ya - mmho
Vea
+200
RIGHT EAR
R
-400 -200 0 200
2
0.5
0
1.0
1
GR
A
GR
C
PRESSURE - daPa
Ya - mmho
+200 Vea - cc
-400 -200 0 200
2
0.5
0
1.0
1
1.5
PRESSURE - daPa
Ya - mmho
Vea
+200
LEFT EAR
L
-400 -200 0 200
2
0.5
0
1.0
1
1.5
PRESSURE - daPa
Ya - mmho
Vea
+200
LEFT EAR
-400 -200 0 200
2
0.5
0
1.0
1
GR
A
GR
C
PRESSURE - daPa
Ya - mmho
+200 Vea - cc
-400 -200 0 200
2
0.5
0
1.0
1
1.5
PRESSURE - daPa
Ya - mmho
Vea
+200
LEFT EAR
L
-400 -200 0 200
2
0.5
0
1.0
1
1.5
PRESSURE - daPa
Ya - mmho
Vea
+200
LEFT EAR
-400 -200 0 200
2
0.5
0
1.0
1
GR
A
GR
C
PRESSURE - daPa
Ya - mmho
+200 Vea - cc
-400 -200 0 200
2
0.5
0
1.0
1
1.5
PRESSURE - daPa
Ya - mmho
Vea
+200
RIGHT EAR
R
High Peak Ya
-400 -200 0 200
2
0.5
0
1.0
1
1.5
PRESSURE - daPa
Ya - mmho
Vea
+200
LEFT EAR
NOTE: Multiple RETEST results
can be considered a REFER.
InTErPrETIng 226-Hz rEsulTs
(tympanograms and associated clinical conditions)
InTErPrETIng 1000-Hz rEsulTs
Stapes Eustachian tube
Seal
Tip
Tip ejector
Probe
TIPs fOr suCCEss
BIggER IS BETTER
When using a tympanometric device with a probe designed
for an external seal, such as the MicroTymp3, a bigger tip is
generally better since the seal is obtained from outside the
external auditory canal, not inside.
USE THE “ScOOP” METHOd
Attain best result by “scooping” the
probe in behind the tragus.
TRY A FAMILIAR ANgLE
The head of the MicroTymp3 handle is
angled at 15°— the same angle as a
Welch Allyn otoscope. Try holding
the MicroTymp3 at the same angle
required for an otoscopic view.
PRAcTIcE,
PRAcTIcE, PRAcTIcE
For those who are new to
tympanometry, or to this type of
hand-held device, there are benefits to
practicing the technique a few times. This builds
confidence and skill, and makes getting a seal quite easy.
TEsT InsTruCTIOns fOr THE WElCH AllYn MICrOTYMP ® 3
SELEcT A TIP
1. Select a large enough tip to seal the entrance to the ear canal.
2. Push the tip onto the probe. Make sure it is fully seated.
TEST
3. Pick up the handle and press . Either “OPEN 226” or “OPEN 1000” will display.
4. To switch to the other frequency, press both the Right memory and
Left memory buttons on the handle simultaneously until the desired frequency
displays. Press to confirm the frequency.
5. Grasp the patient’s pinna. Pull gently back to straighten the ear canal. Both you
and the patient should be motionless during the test.
6. Press the tip firmly against the ear canal opening. Once you achieve a seal, the
TEST message displays. The test is complete when the last data point (226 Hz)
or when a “Quick-Interpretation” message (1000 Hz) displays.
STORE/REcORd
7. 226 Hz: Store test data in the handle by pressing the memory button for the tested
ear: or .
1000 Hz: Record the “Quick-Interpretation” message and value on the MicroTymp3
Screening Results card.
PRINT (226 Hz)
8. Place the handle in the Printer/Charger. The green CHARGE indicator illuminates.
9. Press .
TEST
TEST
R
R
L
L
© 2009 Welch Allyn SM4007 Rev A