Alfieri Fábio Marcon, Lima Alessandra Rodrigues Souto, Battistella Linamara Rizzo, Silva Natalia Cristina de Oliveira Vargas E
Centro de Pesquisa Clinica, Instituto de Medicina Fisica e Reabilitacao, Hospital das Clinicas HCFMUSP. Master Program in Health Promotion and Physical Therapy undergraduation, Adventist University of Sao Paulo (UNASP), Brazil.
Physical Therapy undergraduation, Adventist University of Sao Paulo (UNASP), Brazil.
J Bodyw Mov Ther. 2019 Jul;23(3):583-587. doi: 10.1016/j.jbmt.2019.05.001. Epub 2019 May 8.
Low back pain is a common and very prevalent disease and can impose limitations that negatively impact patients. The objective of this study was to verify and compare the association between lumbar superficial temperature and pressure pain tolerance thresholds in individuals with chronic nonspecific low back pain and healthy controls.
This was a cross-sectional observational study involving 38 individuals with nonspecific chronic low back pain and 19 healthy controls. Volunteers underwent thermographic (infrared sensor), pain perception (visual analog scale), and pressure pain tolerance thresholds (algometry) evaluations in the right and left paravertebral muscles and L4-L5 ligament.
A lower tolerance to pressure pain was found in patients compared to controls at all evaluated sites (p ≤ 0.003). Superficial temperature was significantly higher in the sites evaluated in the low back pain group (p < 0.001). In patients with low back pain, pain perception was weakly and inversely correlated with pressure pain tolerance (r = -0.31; p = 0.05) and moderately correlated to the temperature of the evaluated sites (r = 0.51 to 0.59, p ≤ 0.001). Also, an inverse and weak to moderate association was observed between pressure pain tolerance thresholds and temperature in patients only (r = -0.36 to -0.49; p ≤ 0.02).
Individuals with low back pain have lower pressure pain tolerance thresholds and higher superficial temperature in the lumbar region when compared to healthy individuals. The associations observed show that the higher the pain perception, the lower the pain tolerance and the higher the superficial temperature in the lumbar region. Also, the higher the temperature, the lower the pain tolerance.
下背痛是一种常见且非常普遍的疾病，会给患者带来负面影响并限制其活动。本研究的目的是验证并比较慢性非特异性下背痛患者与健康对照者的腰椎表面温度和压力痛耐受阈值之间的关联。
这是一项横断面观察性研究，涉及38例非特异性慢性下背痛患者和19名健康对照者。志愿者接受了热成像（红外传感器）、疼痛感知（视觉模拟量表）以及左右椎旁肌和L4-L5韧带的压力痛耐受阈值（痛觉计）评估。
在所有评估部位，患者的压力痛耐受性均低于对照组（p≤0.003）。下背痛组评估部位的表面温度显著更高（p<0.001）。在下背痛患者中，疼痛感知与压力痛耐受呈弱负相关（r=-0.31；p=0.05），与评估部位的温度呈中度相关（r=0.51至0.59，p≤0.001）。此外，仅在患者中观察到压力痛耐受阈值与温度之间存在弱至中度的负相关（r=-0.36至-0.49；p≤0.02）。
与健康个体相比，下背痛患者的压力痛耐受阈值更低，腰椎区域的表面温度更高。观察到的关联表明，疼痛感知越高，疼痛耐受性越低，腰椎区域的表面温度越高。此外，温度越高，疼痛耐受性越低。
