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咽鼓管通气功能的完全恢复是鼓室成形与鼓膜修补术成功的条件之一。但迄今为止尚不清楚,基于何种指征可在术前准确地预断其功能可在术后恢复。为此,作者应用阻力计测量法测量了能使咽鼓管被动开放的中耳气压(P_0),保持其开放的压力(P_j)和在吞咽10次后中耳残存的气压(P_R),然后按W=(8ηl)/((?)R~4)=(P_j)/J计算出咽鼓管气流阻力(W)。式中R代表咽鼓管最窄处的半径(mm);l为咽鼓管长度(mm),η为空气的动态粘滞度(cП),P_j为保持压(Пa,帕),J为气流速度(мл/c,即ml/秒)。阻力的单位为
Complete recovery of eustachian tube ventilation is one of the conditions for the successful tympanoplasty and tympanoplasty. However, it is unclear to date which type of indications can be used to accurately predict their function preoperatively and postoperatively. To this end, the authors measured the pressure of the middle ear (P_0), the open pressure (P_j) and the pressure of left ear (P_R) after the pharyngeal eustachian tube was opened passively using a resistance meter and then According to W = (8ηl) / ((?) R ~ 4) = (P_j) / J Eustachian tube airflow resistance (W) was calculated. Wherein R represents the radius (mm) of the narrowest point of the eustachian tube; l is the length of the eustachian tube (mm), η is the dynamic viscosity of air (cП), Pj is the holding pressure Air velocity (мл / c, ie ml / sec). The unit of resistance is