Projekt konstrukcji manipulatora rehabilitacyjnego uwzględniającego ruch osi obrotu stawu kolanowego

Celem pracy było zaprojektowanie i wykonanie prototypu manipulatora rehabilitacyjnego stawu kolanowego o jednym stopniu swobody, który uwzględnia ruch osi w stawie kolanowym. Manipulator ten ma być wykorzystywany do rehabilitacji dzieci w wieku od 6 do 18 lat, u których prowadzone jest wydłużanie kości udowej za pomocą aparatu Ilizarowa. W trakcie realizacji projektu opracowano i przetestowano metody opisu trajektorii ruchu w stawie kolanowym. Zaprojektowano i wykonano wstępną konstrukcję manipulatora rehabilitacyjnego uwzględniającego ruch osi obrotu stawu kolanowego.The aim of the study was to design of the knee rehabilitation manipulator with one degree of freedom, which takes into account the movement of the axis of the knee. The manipulator is to be used for the rehabilitation of children aged 6 to 18 years, who conducted the femoral lengthening using the Ilizarov apparatus. During the project were developed and tested methods of description of the motion trajectory of the knee. Designed and manufactured preliminary rehabilitation manipulator structure that takes into account the movement of the axis of rotation of the knee

Does structural leg-length discrepancy affect postural control? Preliminary study

Abstract Background Leg-length inequality results in an altered position of the spine and pelvis. Previous studies on the influence of leg asymmetry on postural control have been inconclusive. The purpose of this paper was to investigate the effect of structural leg-length discrepancy (LLD) on the control of posture. Methods We studied 38 individuals (19 patients with structural LLD, 19 healthy subjects). The examination included measurement of the length of the lower limbs and weight distribution as well as a static posturography. All statistical analyses were performed with Statistica software version 10.0. Non-parametrical Kruskal-Wallis with Dunn’s post test and Spearman test were used. Differences between the groups and correlation between mean COP sway velocity and the value of LLD as well as the value of LLD and weight distribution were assumed as statistically significant at p  0.05). Meaningful differences in mean COP velocity in mediolateral direction between tandem stance with eyes open and closed were detected in both groups (in controls p = 0.000134, in patients both with the shorter leg in a front and rear position, p = 0.029, p = 0.026 respectively). There was a positive moderate correlation between the value of LLD and the value of mean COP velocity in normal standing in mediolateral direction with eyes open (r = 0.47) and closed (r = 0.54) and in anterioposterior plane with eyes closed (r = 0.05). Conclusions The fact that there were no significant differences in posturography between the groups might indicate compensations to the altered posture and neuromuscular adaptations in patients with structural leg-length inequality. LLD causes an increased asymmetry of weight distribution. This study confirmed a fundamental role of the sight in postural control, especially in unstable conditions. The analysis of mean COP sway velocity may suggest a proportional deterioration of postural control with the increase of the value of leg-length asymmetry. Trial registration number Trial registry: ClinicalTrials.gov NCT03048656 , 8 February 2017 (retrospectively registered)