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M. Jannert - L. Andreasson - A. Ivarsson

Three different maxillary ostial function tests (simultaneous pressure recording in
nose and sinus; simultaneous differential pressure and flow recording across the
ostium; presssure recording at a constant artificial air-flow into the sinus) have been
evaluated on healthy subjects and used in clinical materials. No quantitative
evaluation of the ostial function was possible when using the simultaneous nasosinusal
pressure recording method. The ostial function can be expressed as ostial resistance
or as corresponding equivalent ostial diameter with the pressure-flow and
the constant artificial air-flow methods. An isolated determination of the ostial
function in both sinu-nasal and naso-sinusal directions during nasal breathing was
only possible with the pressure-flow method. No impaired ostial function was found
in cases with maxillary pain and intrasinusal cysts, but in chronic sinusitis the ostial
function was considerably deteriorated. In cases with impaired ostial function the
constant artificial air-flow method does not mirror the true functional state due to
the non-physiological air-flow level used. Thus, the pressure-flow method seems to
be the most physiological one.

Rhinology 0-0: 0-0, 0000