Abstract
Objective: To analyze scientific evidence related to the use of nitrous oxide as an analgesic in parturients. Method: An integrative review of the literature performed in the MEDLINE / Pubmed, CINAHL and LILACS databases using the descriptors: Analgesia, Labor, Nitrous Oxide and their correspondents in English. Data collection occurred from November to December 2018. Results: Obtained seven articles were sampled, mostly presenting evidence level 2B, collaborating to elaborate two thematic categories. It has been shown that nitrous oxide (N2O) is an effective analgesic measure in parturients, and can be used in all stages of labor, with onset of action in seconds and rapid elimination without compromising fetus and mother. Regarding nursing care, information collection, supervision, continuous clinical evaluation and administration to the parturients are required, requiring an accurate supervision and evaluation of fetal vitality and maternal well-being. Conclusion: The use of nitrous oxide is a safe alternative for the relief of pain in parturients. It is intended to stimulate and subsidize new researches that work and deepen the use of nitrous oxide in addition to other pharmacological and non-pharmacological methods that can be applied for the relief of pain during childbirth.