目的：探讨不同年龄助听器佩戴儿童真耳耦合腔差值（real ear to coupler difference ，RECD ）变化趋势。方法将2010年6月至2012年5月在四川大学华西医院耳鼻咽喉头颈外科听力中心进行助听器检测调试的132例重度至极重度听力损失儿童根据测试时年龄分为＜1岁组（15例）、1岁组（26例）、2岁组（36例）、3岁组（29例）和4岁组（26例），各组分别进行双耳RECD测试并分析结果。结果随着年龄的增加，除＜1岁组与2岁组左耳外，不同年龄儿童同侧耳RECD均值呈减小的趋势，并且相差≥2岁时差异有统计学意义；除2岁组外，同年龄组左右耳的RECD平均值差异有统计学意义。结论 RECD有助于儿童助听器的个体化调试，一般每两年应至少进行一次RECD测试，并应双耳测试。%Objective To explore the real ear to coupler difference (RECD) changes in children with hearing aids .Methods 132 severe to profound hearing impaired children who came to hearing center for hearing aids exami-nation and adjustment were recruited into the study .They were put into 6 groups according to the test age ,<1 yr group(15 cases) ,1 yrs group(26 cases) ,2 yrs group(36 cases) ,3 yrs group(29 cases) and 4 yrs group(26 cases) . And all of them had the RECD tests for both ears with custom earmolds .Results The average RECDs for both ears decreased with the age increased .There were statistically differences for the same lateral ears when age differences surpass 2 years except for the difference for left ears between the children in the <1 yr group and 2 yrs group .This study showed there were statistically differences between left and right ears for majority of groups (except for 2 yrs group) .Conclusion RECD is an important factor for individual adjustment .The current results show that the chil-dren with hearing aids should have RECD tests for both ears at least once per two years .
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