Brazilian Journal of Anesthesiology
https://bjan-sba.org/article/doi/10.1016/j.bjan.2013.04.005
Brazilian Journal of Anesthesiology
Scientific Article

Oxigênio suplementar em cesariana eletiva sob raquianestesia: manejar um punhal com cuidado

Supplemental oxygen in elective cesarean section under spinal anesthesia: handle the sword with care

Saban Yalcin; Harun Aydoğ; an; Ahmet Kucuk; Hasan Husnu Yuce; Nuray Altay; Mahmut Alp Karahan; Evren Buyukfirat; Aysun Camuzcuoğ; lu; Adnan İ; ncebı; yı; k; Funda Yalcin; Nurten Aksoy

http://dx.doi.org/10.1016/j.bjan.2013.04.005 Braz J Anesthesiol, vol.63, n5, p.393-397, 2013
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Resumo

JUSTIFICATIVA E OBJETIVOS: Nosso objetivo foi investigar o efeito de 21% e 40% de oxigênio suplementar sobre o estresse oxidativo materno e neonatal em cesariana eletiva (CE) sob raquianestesia. MÉTODOS: Foram incluídas no estudo 80 parturientes com gestação a termo, submetidas à CE sob raquianestesia. As pacientes foram randomicamente alocadas em dois grupos para receberem 21% (grupo Ar) ou 40% (grupo oxigênio) de oxigênio a partir do momento da incisão até o fim da cirurgia. Amostras de sangue das parturientes e da artéria umbilical (AU) foram coletadas antes e depois da cirurgia. A capacidade antioxidante total (CAT), o estado oxidante total (EOT) e o índice de estresse oxidativo (IEO) foram medidos. RESULTADOS: Idade, peso, altura, paridade, semana de gestação, tempo de incisão espinhal, tempo de incisão cirúrgica para extrair o feto, tempo de extração do feto, tempo de cirurgia, escores de Apgar no primeiro e quinto minutos e peso ao nascer foram semelhantes entre os grupos (p > 0,05 em todas as comparações). Não houve diferença entre os grupos em relação aos níveis pré-operatórios de CAT, EOT e IEO (p > 0,05 em todas as comparações). Os níveis maternos pós-operatórios de CAT, EOT e IEO aumentaram significativamente no grupo oxigênio (p = 0,047; < 0,001 e 0,038, respectivamente). Nas artérias umbilicais, os níveis da CAT aumentaram significativamente no grupo oxigênio (p = 0,003) e os de EOT e IEO aumentaram significativamente no grupo Ar (p = 0,02 e < 0,001, respectivamente). CONCLUSÕES: A diferença em relação ao impacto sobre o estresse oxidativo materno e fetal da suplementação de 40% em comparação com a de 21% exige estudos adicionais em ampla escala que investiguem o papel da suplementação de oxigênio durante CE sob raquianestesia.

Palavras-chave

GASES, Oxigênio, Oxigenoterapia, CIRURGIA, Cesárea, Estresse Oxidativo, TÉCNICAS ANESTÉSICAS, Regional, subaracnoidea

Abstract

BACKGROUND AND OBJECTIVES: We aimed to investigate the effect of 21% and 40% oxygen supplementation on maternal and neonatal oxidative stress in elective cesarean section (CS) under spinal anesthesia. METHODS: Eighty term parturients undergoing elective CS under spinal anesthesia were enrolled in the study. We allocated patients randomly to breathe 21% (air group) or 40% (oxygen group) oxygen from the time of skin incision until the end of the operation. We collected maternal pre- and post-operative and umbilical artery (UA) blood samples. Total antioxidant capacity (TAC), total oxidant status (TOS) and the oxidative stress index (OSI) were measured. RESULTS: Age, weight, height, parity, gestation week, spinal-skin incision time, skin incision-delivery time, delivery time, operation time, 1st and 5th minutes Apgar scores, and birth weight were similar between the groups (p > 0.05 for all comparisons). There were no differences in preoperative TAC, TOS, or OSI levels between the groups (p > 0.05 for all comparisons). Postoperative maternal TAC, TOS and OSI levels significantly increased in the oxygen group (p = 0.047, < 0.001 and 0.038, respectively); umbilical artery TAC levels significantly increased in the oxygen group (p = 0.003); and umbilical artery TOS and OSI levels significantly increased in the air group (p = 0.02 and < 0.001, respectively). CONCLUSIONS: The difference in impact on maternal and fetal oxidative stress of supplemental 40% compared to 21% oxygen mandates further large-scale studies that investigate the role of oxygen supplementation during elective CS under spinal anesthesia.

Keywords

Anesthesia, Spinal, Cesarean Section, Oxidative Stress, Oxygen, Oxygen Inhalation Therapy

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