D'OSUALDO ARCOMETER

D’Osualdo’s arcometer is an original manual tool for measuring curves spine surface on the sagittal plane, kyphosis and lordosis. Consists of a millimeter bar on which there are orthogonally applied three rods: one fixed at one end, a movable intermediate on two axes and a third mobile on a single axis.
Dimensions: 35 x 21 x 4.5 h cm; Weight: 3.2 kg

A PRECISE TOOL FOR NON-INVASIVE MEASUREMENT OF KYPHOSIS AND LORDOSIS

The principle behind the tool is the axiom that for three points only one circumference passes. The tool provides us with two data related to the tract of measured spine, approximated to an arc of circumference: the arrow and the rope. Starting from these two data we can obtain: the radius of curvature and the subtended angle, corresponding to the Cobb angle evaluated on the radiography.
The arcometer is a particularly useful tool as an integration to the clinical examination, screening for specialists, follow-up of the patient with curved back already radiographically evaluated: even if it does not replace radiographs, it helps to reduce their numbers. It also allows you to evaluate the subject both in spontaneous and self-correcting position, useful element for assessing the stiffness of the curve, for a judgment on the course and to evaluate the effectiveness of the kinesitherapy and / or orthotic treatment. The instrument is also equipped with a central rod with smaller diameter foot to allow the evaluation of the corset correction (by providing the dorsal pelota with a special hole).

To facilitate the calculation

To measure kyphosis or lordosis, the arcometer is positioned with the side rods at the end of the curve. That value represents the rope. The central rod is brought to the medium point of this distance and therefore is approached to the back; her millimeter scale gives us the value of the arrow. The value of the Cobb angle and the radius one are obtained by a simple chart with two entrances which is supplied together with the tool.