DESCRIPTION
Acoustic Rhinometers allow a very rapid non invasive examination of the nasal cavity using a sound pulse technique. Reflections of the sound pulse, produced by changes in the cross sectional area within the nose, are processed by a PC to provide a plot of the area as a function of distance into the nose. Numerical information such as the area at certain distances and volumes between certain points in the nose can also be presented.

THE A1 COMPACT AND THE A1 EXECUTIVE
Two versions of the system are offered to provide facilities tailored to particular applications which include:- Surgical pre/post comparisons - Nasal symmetry assessment - Allergen challenge recording - Sleep studies Measurement of the effect of decongestants . Hay fever & Common Cold Studies

HARDWARE REQUIREMENTS
We are able to supply complete systems including a PC & Printer. Alternatively we can supply the components required to install the A1 in your PC. The minimum PC requirement is for a  system running Windows 2000, NT, XP or Vista and which has room for a full height PCI bus expansion card (samples at 100kHz for optimum resolution) or has a USB port available (samples at 46kHz). Any printer with a Windows driver should be suitable. Please specify which interface you require.

THE A1 COMPACT PROVIDES
ln built calibration facility; Colour display; Display of mean and SD curves; A4 size printouts; Adjustable scale setting; 

 Calculation of:- The first two minimum areas; Position where minima's were found; The volume between two distances.

THE A1 EXECUTIVE PROVIDES  -All the features found in the A1 Compact plus:- Result verification software facility with CV% calculation:- A raw or calculated data export facility, to allow calculations to be performed in other software packages:- A report generation facility which provides:- Editing of resultant curves; Volume measurement of 4 sectors; Cross section calculation at 6 points; Pre/post graphical display; Pre/post ratio calculation; Pre/post % change; Colour A4 printout of the report:- Artificial nose and straight tube for setting up and performance verification.

It is anticipated that the Al Compact will suit applications where assessment can be based on basic information taken from the screen or from a simple printout, while the Al Executive will be used for detailed investigation usually involving pre/post comparison of data.

ACCESSORIES
Five pairs of medium and large anatomically conformed nose pieces and 5 sets of small, medium and large conical nose pieces are supplied with each system.