A hiperalgesia secundária ocorre independentemente do envolvimento unilateral ou bilateral da osteoartrite de joelho em indivíduos com doença leve ou moderada

Abstract

BackgroundSecondary hyperalgesia in individuals with less severe levels of knee osteoarthritis remains unclear. The objective of this study was to measure the pressure pain threshold (PPT) of individuals with mild or moderate knee osteoarthritis (KOA) and compare with no osteoarthritis. MethodsTen healthy controls and 30 individuals with mild or moderate KOA divided into two groups (unilateral and bilateral involvement) were included. Dermatomes (L1, L2, L3, L4, L5, S1, and S2), myotomes (vastus medialis, vastus lateralis, rectus femoris, adductor longus, tibialis anterior, peroneus longus, iliacus, quadratus lumborum, and popliteus muscles), and sclerotomes (L1‐L2, L2‐L3, L3‐L4, L4‐L5 supraspinous ligaments), over the L5‐S1 and S1‐S2 sacral areas, pes anserinus bursae, and at the patellar tendon) PPT were assessed and compared between individuals with and without KOA. ResultsKOA groups (unilateral and bilateral) reported lower PPT compared to the control group in most areas (dermatomes, myotomes, and sclerotomes). There were no between‐group differences in the supra‐spinous ligaments and over the L5‐S1 and S1‐S2 sacral areas of the sclerotomes. No difference was seen between KOA. ConclusionThese findings suggest that individuals with mild to moderate KOA had primary and secondary hyperalgesia, independent of unilateral or bilateral involvement. These results suggest that the pain have to be an assertive focus in the clinical practice, independent of the level of severity or involvement of KOA.