Hall J W, Grose J H, Pillsbury H C
Division of Otolaryngology-Head and Neck Surgery, University of North Carolina, Chapel Hill Medical School, USA.
Arch Otolaryngol Head Neck Surg. 1995 Aug;121(8):847-52. doi: 10.1001/archotol.1995.01890080017003.
To determine the long-term effect of otitis media with effusion (OME) on binaural hearing in children.
Longitudinal testing over a 4-year period following insertion of tympanic membrane grommets, employing clinical and normal control groups.
Twenty-two children with a history of OME were tested before insertion of grommets and at 3 months and 1 year after surgery; 14, 11, and 8 of the children were followed up for 2, 3, and 4 years after surgery, respectively. An age-matched control group of 40 children was tested.
The masking-level difference (MLD) paradigm was used to measure the ability of the binaural auditory system to aid the detection of a pure-tone signal presented in a random masking noise.
Although the results indicated a significant improvement in the MLD with increasing time after middle ear surgery, the MLD remained significantly reduced even 2 years after hearing threshold correction. The MLDs of the OME group did not differ significantly from those of the control group when tested 3 years after middle ear surgery, even though a small proportion of subjects with a history of OME continued to have MLDs smaller than normal limits.
In general, the results suggest a slow recovery of binaural function in children with OME after restoration of normal hearing thresholds.
确定分泌性中耳炎（OME）对儿童双耳听力的长期影响。
在鼓膜置管术后4年进行纵向测试，设立临床组和正常对照组。
22名有OME病史的儿童在置管术前、术后3个月和1年接受测试；分别有14名、11名和8名儿童在术后2年、3年和4年接受随访。对40名年龄匹配的儿童组成的对照组进行测试。
采用掩蔽级差（MLD）范式来测量双耳听觉系统辅助检测在随机掩蔽噪声中呈现的纯音信号的能力。
尽管结果表明中耳手术后随着时间推移MLD有显著改善，但即使在听力阈值校正2年后，MLD仍显著降低。中耳手术后3年测试时，OME组的MLD与对照组无显著差异，尽管一小部分有OME病史的受试者的MLD仍低于正常范围。
总体而言，结果表明OME患儿在听力阈值恢复正常后双耳功能恢复缓慢。
