Rhinomanometry is a technique used to quantify the degree of nasal obstruction and an Anterior Rhinomanometer allows the obstruction on each side of the nose to be measured separately.
The instrument measures the pressure at the back of the nose and the air flow this pressure produces, during both inspiration and expiration, and separately for each side of the nose.
While the resistance values are calculated and presented numerically, they can also be shown graphically in the form shown. Flow is shown on the vertical axis and pressure on the horizontal and by plotting a flow/pressure graph, the slope of the trace gives a good visual indication of obstruction.
The closer the trace is to the horizontal axis the more obstruction is present, so a trace which is almost vertical indicates a very clear, or open nose.
The more open the nose, the less obstruction is present, and the easier it is to breathe.
The graph shows the result achieved by a subject, who had a measurement made before and after fitting a Breathing Solutions Nasal Actuator unit.
The reduction in resistance was calculated to be 78% during inspiration and 79% during expiration — a very significant improvement.
Rhinomanometer In Use
Article by: Eric Greig, GM Instruments LTD, Unit 6, Ashgrove, Ashgrove Road, Kilwinning, KA13 6PU