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  • Title: Implication of surfactant apoprotein in otitis media with effusion.
    Author: Yamanaka N, Kobayashi K, Kataura A, Kuroki Y, Akino T.
    Journal: Ann Otol Rhinol Laryngol; 1991 Oct; 100(10):835-40. PubMed ID: 1952651.
    Abstract:
    A two-site simultaneous immunoassay using monoclonal antibodies against human surfactant apoprotein (SAP) was used to measure SAP in middle ear effusions (MEEs). In 130 MEE samples from children with otitis media with effusion, SAP was detected in 54 samples (SAP-positive cases, 41.5%). In the remainder, the SAP concentration was below the sensitivity of the immunoassay (SAP-negative cases, 58.5%). A significant difference in periods of observation was found between the SAP-positive cases (17.3 +/- 16.8 months) and the SAP-negative cases (26.2 +/- 22.5 months) (p less than .01). The percentage of positive cases was highest in the serous MEE group (81.2%) and decreased in the purulent MEE group (57%), the mucoid MEE group (30%), and the hyperviscous MEE group (13.6%), in that order. In the purulent MEE group and the mucoid MEE group, the period of observation was significantly shorter in the SAP-positive cases (18.3 +/- 20.4 months and 20.2 +/- 19.4 months) than in the SAP-negative cases (35.9 +/- 24.5 months and 25.4 +/- 18.7 months) (p less than .05). These results suggest that SAP is present in the middle ear cleft and may be a good prognostic predictor of otitis media with effusion in children.
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