Patel Vaibhav, Mishra Girish, Sharma Yojana, Priyadarshini G
Department of ENT and Head and Neck Surgery, Pramukhswami Medical College and Shree Krishna Hospital, Karamsad, Gujarat India.
Indian J Otolaryngol Head Neck Surg. 2023 Sep;75(3):1884-1887. doi: 10.1007/s12070-023-03776-4. Epub 2023 Apr 19.
The objective of this study is to assess the concordance between Belfast 15/30 dB rule of thumb and subjective hearing benefit in middle ear reconstruction surgery. A total of 105 cases of chronic otitis media (COM) (both mucosal and squamosal type) with conductive hearing loss and who underwent middle ear reconstructive surgery during the study period from January 2019 to January 2022 were included. All cases were followed up at 6 week and at 3 months of postoperative duration for subjective assessment of hearing with questionnaire and pure tone audiometry as per standard of care and correlated with Belfast 15/30 dB rule of thumb. Concordance with Belfast rule of thumb was seen in 73.4% cases of both mucosal and squamosal type of COM. Belfast 15/30 dB rule of thumb is a valuable and useful tool to predict hearing benefit following middle ear reconstructive surgery, but, it suffers from the disadvantages of all or none phenomenon and it does not grade the level of hearing improvement. The prediction of postoperative subjective hearing with this Belfast rule of thumb is more reliable in mucosal type of COM than in squamosal type of COM.
本研究的目的是评估贝尔法斯特15/30分贝经验法则与中耳重建手术中主观听力获益之间的一致性。纳入了2019年1月至2022年1月研究期间共105例患有传导性听力损失的慢性中耳炎（COM，包括黏膜型和鳞状上皮型）且接受了中耳重建手术的病例。按照标准护理流程，所有病例在术后6周和3个月时进行随访，通过问卷调查和纯音听力测定对听力进行主观评估，并与贝尔法斯特15/30分贝经验法则进行关联。在黏膜型和鳞状上皮型COM病例中，分别有73.4%的病例符合贝尔法斯特经验法则。贝尔法斯特15/30分贝经验法则是预测中耳重建手术后听力获益的一项有价值且有用的工具，但其存在非此即彼现象的缺点，且未对听力改善程度进行分级。相较于鳞状上皮型COM，该贝尔法斯特经验法则对黏膜型COM术后主观听力的预测更为可靠。
