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- Maico
- Measuring Instruments
- MI 24
- Operating Instructions Manual
Maico MI 24 Operating Instructions Manual
Summary of MI 24
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Operating instructions mi 24, mi 24h i table of contents page 1. Introduction 1 2. Description 2 3. Getting started 4 4. How to create a tympanogram 12 5. How to create a tympanogram with high probe tone (mi 24h) 17 6. How to measure the stapedius reflex 18 7. Interpreting test results 23 8. How to ...
Page 3: 1 Introduction
Operating instructions mi 24, mi 24h 1 1 introduction thank you very much for purchasing a quality product from the family. This automatic tympanometer mi 24 is manufactured to meet all quality and safety requirements. This user manual should make it as easy as possible for you to become familiar wi...
Page 4: 2 Description
Operating instructions mi 24, mi 24h 2 2 description the mi 24 is an automatic instrument that is designed for tympanometric screening. Tests done in the tympanometric screening mode measure middle ear mobility and ipsilateral acoustic reflex. Contralateral acoustic reflex is available as an option....
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Operating instructions mi 24, mi 24h 3 note: 1.02 mm h 2 o = 1.0 dapa..
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Operating instructions mi 24, mi 24h 4 2.2 acoustic reflex an acoustic reflex, or contraction of the stapedial muscle, occurs under normal conditions when a sufficiently intense sound is presented to the auditory pathway. This contraction of the muscle causes a stiffening of the ossicular chain whic...
Page 7: 3 Getting Started
Operating instructions mi 24, mi 24h 5 3 getting started your mi 24 was carefully inspected and packed for shipping. However, it is good practice to thoroughly inspect the outside of the shipping container for signs of damage. If any damage is noted, please notify the carrier immediately. 3.1 unpack...
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Operating instructions mi 24, mi 24h 6.
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Operating instructions mi 24, mi 24h 7 3.2 environmental conditions for the mi 24 the mi 24 should be operated in a quiet room. The test room must be at normal temperature, usually 15° c / 59° f to 35° c / 95° f, and the instrument should be switched on about 10 minutes before the first measurement ...
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Operating instructions mi 24, mi 24h 8 3.4 getting familiar with the mi 24 3.4.1 the mi 24 front panel controls see the following keys: 1. Print = printout 2. L/r = switch over left/right ear 3. Reflex = reflex measure off/ipsi/contra 4. Menu 5. Left = left (cursor control) 6. Down = down (cursor co...
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Operating instructions mi 24, mi 24h 9 24.".
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Operating instructions mi 24, mi 24h 10 3.4.2 the mi 24 rear panel connections a. Power connection socket b. Probe tube connection c. Probe connection socket d. Pc interface e. Contra receiver socket 3.4.3 switch the instrument on turn the power switch on. The lcd will show the type of instrument an...
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Operating instructions mi 24, mi 24h 11 3.4.4 the display of the mi 24 the test result is shown during the measurement on the lcd. The measurements are saved automatically and can be printed out in a fast and quiet way with the integrated printer. In figure 5 the initial empty measurement screen is ...
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Operating instructions mi 24, mi 24h 12 3.5 calibrate the probe adjust the impedance measuring instrument every day to the actual atmospheric pressure by means of the enclosed calibration volume. The calibration is very easy and takes only 20 seconds. Press the menu key and the main menu (figure 6)...
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Operating instructions mi 24, mi 24h 13 3.6 getting familiar with the probe the probe of the mi 24 is shown in figure 8. The probe head is adjustable to three angles (0°, 60° and 80°). It is adjusted by turning the locking screw at the bottom of the probe using a coin or a screw driver. Adjust the p...
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Operating instructions mi 24, mi 24h 14 if the probe tip is clogged, you can remove it by opening the fixation ring . After cleaning the probe tip or attaching a new one, the tip must be fixed again by fastening the fixation ring. 3.7 choose an appropriate ear tip choose an ear tip of the appropriat...
Page 17: How to Create A Tympanogram
Operating instructions mi 24, mi 24h 15 4 how to create a tympanogram in the following paragraph we will briefly explain the principle and the background of the impedance measurement to create a better understanding. If you want to begin the measurements immediately, just skip this paragraph and con...
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Operating instructions mi 24, mi 24h 16 the impedance measurement examines the acoustic resistance of the middle ear. If the eardrum is hit by a sound, part of the sound is absorbed and sent via middle ear to the inner ear while the other part of the sound is reflected. The stiffer the eardrum is th...
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Operating instructions mi 24, mi 24h 17 4.2 preparing the patient explain to the patient that the measurement is painless and that nothing enters the auditory canal. The patient does not have to respond when there are loud test sounds or when the pressure in the auditory canal changes. In no case sh...
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Operating instructions mi 24, mi 24h 18 4.5 how to evaluate the tympanogram display after having completed a measurement you can see the results on the lcd. On the left side of the display you see a graph of the tympanogram. The area surrounded by the box is valid for “normal” tympanograms. You can ...
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Operating instructions mi 24, mi 24h 19 4.6 how to print the test result after the end of a test you can print the results for your records by pressing the print button . The quiet thermal printer prints out the example used in the previous paragraph in only six seconds. While the printer is working...
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Operating instructions mi 24, mi 24h 20 5 how to create a tympanogram with high probe tone in addition to the standard 226 hz probe tone tympanometry, the mi 24h has a higher frequency probe tone that can be selected by the user. A tympanogram recorded using the high probe tone is generally better s...
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Operating instructions mi 24, mi 24h 21 6 how to measure the stapedius reflex 6.1 the basics of the stapedius reflex measurement while tympanometry measures the change of the compliance caused by changing pressure in the outer auditory canal, the stapedius reflex measurement works with a changing co...
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Operating instructions mi 24, mi 24h 22 measurement. It is very important that the patient does not move because a reflex can be registered with a change of compliance of 0.05 ml..
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Operating instructions mi 24, mi 24h 23 6.3 preparing the ipsilateral measurement the lcd shows the empty tympanogram for the right ear and the control light of the probe is red. To measure the left ear, change the side by pressing the l/r key or the probe button. The selected test ear shown in the ...
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Operating instructions mi 24, mi 24h 24 6.4 taking the ipsilateral measurement carry out the measurement as described in chapter 4.4 “recording the tympanogram.” the stapedius reflex is measured after the measurement of the tympanogram. During the measurement of the stapedius reflex the change of th...
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Operating instructions mi 24, mi 24h 25 6.5 preparing the contralateral measurement (optional) switch on the contralateral reflex measurement by pressing the reflex key (the word contra must appear on the right top of the lcd). Here the highest fixed level is 110 db hl (with tdh 39 contra phone only...
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Operating instructions mi 24, mi 24h 26 how to print the test results after a test, print the results for your documents by pressing the print button. The printer prints out the example used in the previous paragraph in only 12 seconds. While the printer is working no key action is possible and the ...
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Operating instructions mi 24, mi 24h 27 7 interpreting test results 7.1 understanding the printout the printout contains the following information: ear volume compliance pressure gradient reflex test results ( pass, fail) and ipsi, contra or tympano- gram (depending on the test you have performed). ...
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Operating instructions mi 24, mi 24h 28 7.2 interpreting the tympanometric test result as a general rule, values for ear canal volume should be between 0.2 and 2.0 ml (children and adults). A variance will be seen within this range depending on the age and ear structure of the person. For example, a...
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Operating instructions mi 24, mi 24h 29 middle ear fluid such as in serious otitis media will yield a very flat tympanogram with no definite peak and negative air pressure. A resolving case or beginning case may produce a reduced peak in the presence of severe negative middle ear pressure. The ear c...
Page 32: 8 How to Test Children
Operating instructions mi 24, mi 24h 30 8 how to test children when practicing impedance measurement with small children, be aware of problems caused by the child being restless or afraid of the examination or reacting sensitively to the change of pressure and the loud test sound. There are also dif...
Page 33: 9 Additional Reading
Operating instructions mi 24, mi 24h 31 9 additional reading auditory disorders: a manual for clinical evaluation jerger, susan, and james jerger boston: college hill press, 1981 handbook of clinical audiology katz, jack baltimore: william & wilkins, 1994 roeser´s audiology desk reference roeser, ro...
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Operating instructions mi 24, mi 24h 32 10 individual setup of the mi 24 the mi 24 offers many options for the experienced user to adapt the instrument to individual demands. The settings shown in the figures are the standard settings. If you have altered a value by accident you just have to return ...
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Operating instructions mi 24, mi 24h 33 10.2 the tympanometer setup select the menu option tympanometry setup menu as illustrated in figure 26 and the tympanometer setup menu will appear on the lcd . Change the menu options with the up/down cursor keys. Change the displayed item with the left/right ...
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Operating instructions mi 24, mi 24h 34 tympanogram test screen. Values can be set between 0.1 ml and 1.0 ml in steps of 0.1 ml. To leave the tympanometry setup menu press the menu button..
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Operating instructions mi 24, mi 24h 35 10.3 the setup menu for reflex test select the menu option reflex test setup menu from the main setup menu as described before for the tympanometry setup menu. The reflex setup menu will appear on the lcd . The reflex setup menu offers the following options: a...
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Operating instructions mi 24, mi 24h 36 10.4 the common setup menu select the menu option common setup menu from the main setup menu. The common setup menu offers the following options. Power-up: choose the test mode of the mi 24 after switching on. With the tymp setting, only tympanometry is tested...
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Operating instructions mi 24, mi 24h 37 language : you can choose one of the following languages: german, french, english or spanish for the text on the lcd and the printout. After selection all the texts appear in the chosen language. Display adjust : the contrast of the lcd can be changed with thi...
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Operating instructions mi 24, mi 24h 38 11 care and maintenance of the instrument disconnect the power plug before cleaning. To clean the instrument, probe, contralateral receiver and other accessories use a soft, damp cloth (use warm soapy water; no liquids containing alcohol or ammonia should be u...
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Operating instructions mi 24, mi 24h 39 12 how to change the printer paper at the right side of the housing, pull the printer cover up using its finger recess in the front of the printer cover. Remove the printer cover. Remove the empty paper roll. Place the new paper roll in the paper compartment i...
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Operating instructions mi 24, mi 24h 40 13 warranty, maintenance and after-sales service 13.1 warranty this warranty is extended to the original purchaser of the mi 24/mi 24h by maico, through the authorized special instrument distributor from whom it was purchased, and covers defects in material an...
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Operating instructions mi 24, mi 24h 41 13.2 maintenance the mi 24 is designed to require minimal maintenance and should provide you with years of trouble-free use. The following suggestions may assist you in avoiding and/or solving problems. Calibration: the optimum length of time between recalibra...
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Operating instructions mi 24, mi 24h 42 care of eartips: the eartips supplied with your instrument are latex-free silicone rubber and can be cleaned with a mild soap and water, chlorine bleach or with alcohol. Dry the tips thoroughly before replacing them on the probe. Shipping instructions for reca...
Page 45: 14 Safety Regulations
Operating instructions mi 24, mi 24h 43 14 safety regulations 14.1 electrical safety: the mi 24 tympanometer is constructed to comply with protection class ii of the international standard iec 601-1 (en 60601-1). The instruments are not intended for operation in areas with an explosion hazard. 14.2 ...
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Operating instructions mi 24, mi 24h 44 15 checklist for subjective device control according to the manufacturer requirements, the user should test the instrument once a week. This is to find errors immediately and to avoid inaccurate test results. This test should test tympanogram and reflex with a...
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Operating instructions mi 24, mi 24h 45 tested by: date:.
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Operating instructions mi 24, mi 24h 46 16 technical data and accessories impedance measurement: type: clas 2 acc. To ansi s3.39 tympanometer: test frequency: 226 hz ± 1% test level: 85 db spl in 2 cm 3 pressure range: +200 to -400 dapa volume range: 0.1 to 6.0 ml accuracy: ± 5 % or ± 10 dapa test t...
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Operating instructions mi 24, mi 24h 47.
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Operating instructions mi 24, mi 24h 48 connection plugs: a. Power socket b. Pressure tube c. Probe d. Usb pc-interface e. Contralateral phone (option) warm up time: less than 10 minutes after power on environment conditions: + 15 to + 35 °c / + 59 to + 95 °f (operation) + 5 to + 50 °c / + 41 to + 1...
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Operating instructions mi 24, mi 24h 49 maico diagnostics 10393 west 70 th st eden prairie, mn 55344 tel.: 888.941.4201 fax: 952.278.4481 e-mail: info@maico-diagnostics.Com internet: www.Maico-diagnostics.Com accessories: standard: 1 hand-held probe 1 power cable 1 set of ear tips 1 calibration cavi...
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Operating instructions mi 24, mi 24h 50
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1162-0321 rev. E 07/07.