Instituto de Ciências da Saúde da Universidade Paulista, Brazil.
J Clin Nurs. 2012 Dec;21(23-24):3513-22. doi: 10.1111/j.1365-2702.2011.04019.x. Epub 2012 May 30.
To evaluate the effectiveness of a low-level laser therapy for pain relief in the perineum following episiotomy during childbirth.
Laser irradiation is a painless and non-invasive therapy for perineal pain treatment and its effects have been investigated in several studies, with no clear conclusion on its effectiveness.
A double-blind randomised controlled clinical trial.
One hundred and fourteen women who underwent right mediolateral episiotomies during vaginal birth in an in-hospital birthing centre in São Paulo, Brazil and reported pain ≥ 3 on a numeric scale (0-10) were randomised into three groups of 38 women each: two experimental groups (treated with red and infrared laser) and a control group. The experimental groups were treated with laser applied at three points directly on the episiotomy after suturing in a single session between 6-56 hours postpartum. We used a diode laser with wavelengths of 660 nm (red laser) and 780 nm (infrared laser). The control group participants underwent all laser procedures, excluding the emission of irradiation. The participants and the pain scores evaluator were blinded to the type of intervention. The perineal pain scores were assessed at three time points: before, immediately after and 30 minutes after low-level laser therapy.
The comparison of perineal pain between the three groups showed no significant differences in the three evaluations (p = 0.445), indicating that the results obtained in the groups treated with low-level laser therapy were equivalent to the control group.
Low-level laser therapy did not decrease the intensity of perineal pain reported by women who underwent right mediolateral episiotomy.
The effect of laser in perineal pain relief was not demonstrated in this study. The dosage may not have been sufficient to provide relief from perineal pain after episiotomy during a vaginal birth.
评估低水平激光疗法在分娩会阴侧切后缓解疼痛的效果。
激光照射是一种治疗会阴疼痛的无痛、非侵入性疗法，已有多项研究对其疗效进行了探讨，但仍未得出明确的结论。
双盲随机对照临床试验。
在巴西圣保罗一家医院的分娩中心，114 名接受右侧正中旁会阴切开术的女性在阴道分娩后报告数字评分法（0-10）疼痛≥3，将其随机分为三组，每组 38 名女性：两组实验组（分别用红色和红外线激光治疗）和一组对照组。实验组在产后 6-56 小时内，在会阴切开缝合后，将激光直接照射在会阴切开的三个点上，进行单次治疗。我们使用波长为 660nm（红色激光）和 780nm（红外线激光）的二极管激光。对照组的参与者接受了所有的激光操作，但不发射照射。参与者和疼痛评分评估者对干预类型不知情。在三个时间点评估会阴疼痛评分：治疗前、治疗后即刻和治疗后 30 分钟。
三组会阴疼痛的比较显示，三次评估均无显著差异（p=0.445），表明接受低水平激光治疗的三组结果与对照组相当。
低水平激光疗法并未降低接受右侧正中旁会阴切开术的女性报告的会阴疼痛强度。
本研究未显示激光在缓解会阴疼痛方面的效果。在阴道分娩会阴侧切后，激光的剂量可能不足以缓解会阴疼痛。
