Silveira Netto Luciana Fick, da Costa Sady Selaimen, Sleifer Pricila, Braga Maria Elisa Luce
Ear, Nose and Throat Service, Chronic Otitis Media Ambulatory Care Center, Hospital de Clínicas de Porto Alegre, Brazil.
Int J Pediatr Otorhinolaryngol. 2009 Dec;73(12):1751-6. doi: 10.1016/j.ijporl.2009.09.033. Epub 2009 Oct 23.
Otitis media is the most common otological condition during childhood which compromises sound conduction in the middle ear. In chronic cases, it is estimated that the degree to which hearing is compromised is directly proportional to the damage caused to the middle ear's structures. It means that hearing thresholds may be influenced by factors such as the size and location of the tympanic perforation, the presence of ossicular chain erosion or disarticulation as well as the presence of cholesteatoma and its growth patterns. The goals of this study were to compare air conduction, bone conduction thresholds and air-bone gaps of children and teenagers between those with chronic suppurative otitis media with cholesteatoma and those without cholesteatoma. To compare air-bone gap values for different cholesteatoma growth patterns. To verify the relationship between the number of perforated quadrants and the size of the air-bone gap. To compare air-bone gap values between tympanic perforations in posterior quadrants with those in anterior quadrants.
A transversal study involving 202 children and teenagers (287 ears), aged between 6 and 18, with chronic suppurative otitis media with and without cholesteatoma, submitted to digital videotoscopy and pure tone audiometry (PTA) was conducted.
Air conduction, bone conduction thresholds and air-bone gaps in children and teenagers with CCOM are significantly greater. There were no significative differences between air-bone gaps in epitympanic and posterior mesotympanic cholesteatomas. In NCCOM, the gap value is positively correlated with the number of quadrants with tympanic perforation. There was no significative difference between the air-bone gaps in tympanic perforations affecting the posterior and anterior quadrants.
中耳炎是儿童时期最常见的耳部疾病，会影响中耳的声音传导。在慢性病例中，据估计听力受损程度与中耳结构所受损伤成正比。这意味着听力阈值可能受鼓膜穿孔的大小和位置、听骨链侵蚀或脱节的存在以及胆脂瘤的存在及其生长模式等因素影响。本研究的目的是比较患有胆脂瘤的慢性化脓性中耳炎儿童和青少年与未患胆脂瘤的儿童和青少年的气导、骨导阈值和气骨导差。比较不同胆脂瘤生长模式的气骨导差值。验证穿孔象限数量与气骨导差大小之间的关系。比较后象限鼓膜穿孔与前象限鼓膜穿孔的气骨导差值。
对202名年龄在6至18岁之间患有或未患有胆脂瘤的慢性化脓性中耳炎儿童和青少年进行了一项横断面研究，这些儿童和青少年接受了数字视频耳镜检查和纯音听力测定（PTA）。
患有慢性化脓性中耳炎的儿童和青少年的气导、骨导阈值和气骨导差明显更大。上鼓室胆脂瘤和中鼓室后胆脂瘤的气骨导差之间没有显著差异。在非胆脂瘤性慢性化脓性中耳炎中，气骨导差值与鼓膜穿孔的象限数量呈正相关。影响后象限和前象限的鼓膜穿孔的气骨导差之间没有显著差异。
