The sample comprised 44 volunteers who had undergone some surgical procedure and were equally divided into four groups. G1 started the therapy 24 h after the surgical procedure with the device off. G2 followed the same time pattern, 24 h, but with the device turned on. G3 and G4 started therapy three days after the surgical procedure; in G3, the device was turned off, and in G4, the device remained on during therapy; each session lasted 30 min, using 660 nm (red), energy 180 J. For all groups, the therapy started with daily use for seven days and followed the interval use of three times a week until completed 21 days. The revaluation was performed after 7 and 21 days. The results found show changes in HR at rest, systolic and diastolic BP, and in peripheral oxygen saturation, which showed a significant difference in the groups that used on-therapy (p < 0.05). In the MCGILL Scale evaluation, the mean total score showed a more accentuated drop in the groups that used ILIB, (p < 0.05). ILIB may have prevented a more significant evolution of firosis levels; however, no changes were observed in the evaluation of sleep and anxiety. The application of the ILIB in patients undergoing plastic surgery was supported in terms of hemodynamics and pain; in addition, starting the ILIB application 24 h after the procedure proved to be more advantageous.

样本由 44 名接受过某种外科手术的志愿者组成，并被平均分为四组。 G1 在手术后 24 小时开始治疗，设备关闭。 G2 遵循相同的时间模式，即 24 小时，但设备处于开启状态。 G3和G4在手术后三天开始治疗；在G3中，设备被关闭，在G4中，设备在治疗期间保持开启状态；每次疗程持续 30 分钟，使用 660 nm（红色），能量 180 J。对于所有组，治疗开始时每天使用 7 天，然后每周间隔使用 3 次，直至完成 21 天。 7 天和 21 天后进行重估。结果发现，静息心率、收缩压和舒张压以及外周血氧饱和度发生了变化，这在接受治疗的组中存在显着差异（p  < 0.05）。在 MCGILL 量表评估中，使用 ILIB 的组的平均总分下降幅度更大（p  < 0.05）。 ILIB 可能阻止了纤维化水平的更显着演变；然而，睡眠和焦虑的评估没有观察到变化。 ILIB在接受整形手术的患者中的应用在血流动力学和疼痛方面得到了支持；此外，在手术后 24 小时开始 ILIB 应用被证明更有利。