The prevalence of ETD in patients with different pathological types of CRS, the influencing factors of eustachian tube function in preoperative CRS patients, and the consistency of the two eustachian tube function detection methods and the test efficacy of the two eustachian tube function detection methods were analyzed.<h4>Results</h4>Correlations & Risk Factors: CRSwNP: Serum total IgE moderately correlated with preop ETDQ-7 (ρ = 0.497, p = 0.001). Here, IGHE is linked to congenital rubella syndrome.