Alfieri Fábio Marcon, Vargas E Silva Natália Cristina de Oliveira, Dos Santos Artur César Aquino, Battistella Linamara Rizzo
Clinical Research Center, Institute of Physical Medicine and Rehabilitation, Clinics Hospital (HCFMUSP), School of Medicine, University of São Paulo, São Paulo, Brazil.
Adventist University of São Paulo (UNASP), Brazil.
Reumatologia. 2020;58(5):272-276. doi: 10.5114/reum.2020.100195. Epub 2020 Oct 29.
Osteoarthritis is a common disease in which skin temperature may be included among the pathophysiological factors. Thermography allows the mapping of cutaneous temperature and may be employed in the investigation of osteoarthritis.
To evaluate cutaneous temperature of the lower limbs, as well as to verify its association with pressure pain thresholds in individuals with knee osteoarthritis.
This case series study was conducted with individuals of both genders aged 48-77 years with unilateral knee osteoarthritis. Volunteers underwent thermographic evaluation by an infrared sensor (FLIR T650SC). The anterior region of the thigh and leg and the knee area were evaluated. Pressure pain thresholds (PPT) were evaluated by algometry (Pain Diagnostics, Great Neck, USA) at the vastus medialis, vastus lateralis, rectus femoris, and patellar tendon. Data analysis was conducted with the statistical package SPSS v.24 for Windows. Comparisons between affected and unaffected sides were made by paired Student's -test or the Mann-Whitney test, and associations between variables were assessed by Pearson or Spearman's correlation coefficient. In all cases, the significance level was set at ≤ 0.05.
Eleven volunteers (63.1 ±9.5 years) participated in this study. When comparing cutaneous temperature, only the region of the knee showed a significant difference between sides ( = 0.02). There were no differences between affected and unaffected knees regarding pain tolerance (PPT) at all sites evaluated. There were also no significant associations between the study variables.
Individuals with knee osteoarthritis presented a higher temperature of the affected knee, but this was not associated with pressure pain thresholds.
骨关节炎是一种常见疾病，皮肤温度可能是其病理生理因素之一。热成像技术可绘制皮肤温度图，可用于骨关节炎的研究。
评估下肢皮肤温度，并验证其与膝关节骨关节炎患者压力疼痛阈值的相关性。
本病例系列研究针对年龄在48 - 77岁的单侧膝关节骨关节炎患者，男女不限。志愿者通过红外传感器（FLIR T650SC）进行热成像评估。对大腿前部、小腿前部及膝关节区域进行评估。通过压力测定法（Pain Diagnostics，美国大颈）在股内侧肌、股外侧肌、股直肌和髌腱处评估压力疼痛阈值（PPT）。使用Windows版SPSS v.24统计软件包进行数据分析。患侧与未患侧之间的比较采用配对t检验或曼 - 惠特尼检验，变量之间的相关性通过皮尔逊或斯皮尔曼相关系数进行评估。在所有情况下，显著性水平设定为≤0.05。
11名志愿者（63.1±9.5岁）参与了本研究。比较皮肤温度时，仅膝关节区域两侧存在显著差异（P = 0.02）。在所有评估部位，患侧与未患侧膝关节在疼痛耐受性（PPT）方面无差异。研究变量之间也无显著相关性。
膝关节骨关节炎患者患侧膝关节温度较高，但这与压力疼痛阈值无关。
