一项研究表明，以牙科麻醉剂“笑气”之名著称的氧化亚氮，已取代氟氯烃，成为上层大气中的臭氧最强有力的破坏物。
Nitrous oxide, better known as the dental anaesthetic "laughing gas", has replaced CFCs as the most potent destroyer of ozone in the upper atmosphere, a study has shown.
医源性因素包括：牙科器械、气管插管行全身麻醉、肺活量测定。
Iatrogenic causes include: dental instrumentation, general anesthesia with endotracheal intubation, spirometry.
试验计划将集中在六个关键的外科领域：需要麻醉的心脏病、癌症、神经病学、视力、脊柱畸形和牙科治疗。
The pilot project will focus on six key surgical areas: cardiac, cancer, neurology, sight, spinal deformity, and dental treatment requiring anaesthesia.
应用推荐