Can Fam Physician. 1980 Jan;26:83-7.
A method of analgesia relatively new to North American emergency care involves the use of a homogeneous gas composed of 50% nitrous oxide and 50% oxygen (Entonox). The gas is administered by the patient, who holds the Entonox apparatus mask to his face and triggers gas flow by exerting negative inspiratory pressure (-1 cm. H(2)O). Worthwhile analgesia (i.e. marked or partial pain relief) was achieved in 95% of 110 emergency department patients experiencing significant pain from various sources.
一种在北美急救护理中相对较新的镇痛方法涉及使用由 50%氧化亚氮和 50%氧气（恩他诺）组成的均匀气体。患者通过将恩他诺设备面罩置于面部并通过施加负吸气压力（-1 厘米水柱）来触发气体流动来施用该气体。在 110 名因各种来源而感到明显疼痛的急诊患者中，95%的患者实现了有价值的镇痛（即明显或部分缓解疼痛）。
