Hot Patch Applied to the Lower Back for Pain Relief during the Active Phase of the First-stage Labor: A randomized controlled trial
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Abstract
Objectives: To determine the efficacy of hot patch for pain relief during the active phase of the first stage labor.
Materials and Methods: Fifty-eight singleton pregnant women undergoing normal delivery at Khon Kaen Hospital between February 5 and May 30, 2020, were randomly assigned into two groups: hot patch and standard care. The hot patch was applied to the lower back (dermatome T10 to L1) when cervix dilatation reached 4-6 cm until fully dilated. Pain scores were recorded before hot patch application and every hour until the end of the first stage labor.
Results: Baseline characteristics were not significantly different between groups (p > 0.2). The mean pain score of the hot patch group was significantly less than the control group at 1, 2, 3, 4, and 5 hours after intervention (4.4 ± 1.9 vs. 6.4 ± 1.8, 5.6 ± 2.2 vs. 7.4 ± 1.3, 5.4 ± 1.8 vs. 8.1 ± 0.8, 5.7 ± 2.2 vs. 8.4 ± 0.7, 8.0 ± 0.0 vs. 8.7 ± 0.5, p < 0.001, respectively). The mean duration of the active phase of the first stage labor in the hot patch group was significantly < 0.001). There was no adverse event found.
Conclusion: A hot patch applied to the lower back significantly reduced labor pain during the first stage labor.
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