NASAL PRESSURE CHANGES DURING SWALLOWING

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Abstract
Nasal pressure curves during swallowing were recorded 1,219 times in 88 healthy subjects. Of these 940 were satisfactory for analysis and could be grouped into four basic types:Type I. An initial positive deflection followed by a smooth downward trend to a maximum negative point terminating with an abrupt positive deflection. Incidence 195 (20.7 per cent).Type II. Similar to Type I but with formation of a plateau in the mid portion of the downward component. Incidence 504 (53.6 per cent).Type III. Similar to Type I but with a cleft initial peak. Incidence 93 (9.9 per cent).Type IV. A complex combining the features of Types II and III. Incidence 148 (15.8 per cent).Nasal pressures during deglutition ranged from 32 mm. Hg above resting nasal pressure during the initial positive deflection to 34 mm. Hg below resting nasal pressure near the termination of swallowing. The duration of the nasal pressure complex was from 0.52 to 2.39 seconds, usually approximately 1 second. Statistical analysis revealed that: (1...

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