The nasal volume of children as measured by Manometric Rhinometry

A new method of measuring nasal volume has been developed called 'Manometric Rhinometry'. We describe the principle behind its use and present the results of measuring two groups of normal children aged 4-10. The total volume of the nasal cavity, paranasal sinuses and postnasal space in these children averaged 81 ml in 4-year olds and 140 ml in 10-year olds when measured using an open cell foam plug. Where a rigid nasal tip was used the volume averaged 67 ml in 4-year olds rising to 99 ml in 8-year olds. Correlation with age, weight, height and head circumference showed the greatest correlation with height (r = 0.66). Multiple regression analysis did not add further explanatory power.