Analgesia perineal pela bolsa de gelo após o parto normal: ensaio clínico randomizado / Perineal analgesia with ice packs after vaginal delivery: randomized clinical trial

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The purpose of this study was to evaluate the effectiveness of ice pack application in perineal pain after vaginal delivery. It is a randomized clinical trial controlled and was held at the Birth Center of the Amparo Maternal, in Sao Paulo. The population was divided in three groups - Experimental, which used ice packs on the perineum, Placebo, which used water packs at room temperature, and Control, which did not use any treatment. The inclusion criteria were: age 18 years, nulliparous women, cephalic presentation, time between 2 and 48 hours after normal birth, noting perineal pain 3, no medical or obstetric complications and newborn (NB) in good condition.The exclusion criteria were: Raynauds syndrome and refusal or withdrawal of the packs. The packs were applied during twenty minutes. In all three groups the temperature of perineum, pack, environment and armpit were controlled. For pain assessment a numerical scale from 0 to 10 was used, zero for no pain and ten for unbearable pain. After approval by the Research Ethics Committee of the School of Nursing of the University of São Paulo, the data was collected in January and February 2008. For this study, 117 women were considered eligible but 3 refused to participate; the remaining 114 were divided in three groups of 38. The average age of the women was 22.2 years, 83.3% had high school education, 89.5% lived with a partner, 49.1% had paid jobs, 84.2% were not Afro-descendants and 50.9% had their husband as companion in childbirth.The perineal trauma occurred in 94.4% of the women, 64.0% of them with episiotomy. As numerical variables the averages were: 20.6 h time of postpartum perineal pain, 3254 g weight of newborns, 3.4 cm length of perineal trauma, 36.5 °C armpit temperature, 26.9 °C temperature of environment and 32.7 ° C perineum initial temperature. There were similarities in all groups, in all the variables studied for characterization. The average initial temperature was 27.2 °C for water packs and 3.8 °C for ice packs. Twenty minutes after intervention, the average perineal temperature was 34 °C in the control group, 30.9 °C in the placebo group and 12.6 °C in the experimental group. Comparing the pain average at the beginning and after 20 minutes, it was observed that in the three groups (control, placebo and experimental) there had been a significant reduction of pain (p <0.001). In the comparison between groups it was found that the experimental group had a lower pain average than the control group (1.6 versus 3.3, p = 0.032). There was a significant difference (p = 0.003) in the percentage of improvement in perineal pain among the three groups. The experimental group reported the greatest pain relief, with 22 (57.9%) mothers showing improvement above 50% and 13 (34.2%) reporting improvement between 30 and 50%. When comparing the average pain between 20 and 40 minutes and between 40 and 60 minutes no statistical difference was found within each group and among the control, placebo and experimental groups. It follows that the use of ice packs for twenty minutes was effective for perineal pain relief after vaginal delivery

ASSUNTO(S)

perineum postpartum period pain dor período pós-parto obstetrical nursing cryotherapy enfermagem obstétrica crioterapia períneo

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