The instrument basically consists of a lever at which main bar, curved, two further articulated bars are applied. The curvature of the first bar is intended to adapt to the anatomy of the lumbar back passage, the lateral bars are drawn to lean on the iliac crests and will be more or less open depending on the size of the basin.
Dimensions: 34 x 8 x 2 h cm; Weight: 1.8 kg
AN ADAPTIVE LEVER, STILL USEFUL TODAY
The bubble placed in the center of the main bar tells us essentially if the pelvis is levelled, when patient is positioned in orthostatism with load well distributed on the two lower limbs. Otherwise the operator will place one or more raises on the falling side, until the instrument will be levelled. At this point it will be possible to check the pelvis alignement and quantify the difference in length of the lower limbs. For this purpose, the kit is equipped with a series of ½ and 1 cm raises.
Note that the evaluation of a difference in length of the lower limbs requires a lot of attention. Indeed mistakes are possible either for incorrect positioning of the subject but also for presence of anatomical variables, such as asymmetric skeletal pelvis, twisting of the lower limbs, laxity of one or more joints, musculotendinous retractions. To improve the evaluation accuracy it is therefore suggestable to use multiple measurements in different postures, now made possible by the different tools contained in this kit.