Maico MI 34 Operating Instructions Manual

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Maico MI 34 Operating Instructions Manual Manual pdf 40 page image

Operating Instructions MI 34 / MI 34 HGEBAmi34e.11a.docx 39 850 232/14 08/1110 How to test childrenThe practice of the impedance measurement is difficult especially with smallchildren. You could have problems with the child being restless or afraid ofthe examination or reacting sensitively to the change of pressure and theloud test sound but also with different conditions of the eardrum and themiddle ear which do not appear in ears of adults.During the measurement the minimum compliance must come to 0.08 ml,if it is less a straight line runs over the zero line.It is difficult to reach a probe seal with restless children. If the child yawnsor cries it is impossible for the instrument to create a stable pressure in theouter auditory canal. In addition speaking causes stapedius muscle reflexeswhich lead to a permanent change of the compliance of the eardrum.So the child should be made familiar with the surroundings and the earbeing touched by the probe in order to carry out a successful impedancemeasurement. This could be done by getting in touch with the child and bytouching the ear in a playing way with the probe. If you can touch the earwithout problems the child will normally accept the probe being inserted.If the child has accepted the surroundings and the touch of the ear it isimportant to distract the child’s mind from the measurement. Here you cansucceed in diverting the child by many different methods. Your phantasy isnearly unlimited; you just have to avoid loud sound.In case you measure very small children and have to calm them with e.g. adummy or a tea-bottle the result might be slightly falsified, maybe by aslightly irregular line of the Tympanogram.