Kawahito S, Kitahata H, Kimura H, Kohyama A, Saito T
Department of Anesthesiology, Tokushima University School of Medicine.
Masui. 1995 Jan;44(1):10-4.
We studied the incidence and cause of hypoxemia during Cesarean section under general anesthesia. Arterial oxygen desaturation (< or = 95%) occurred in 6 of 28 patients (21%). Venous air embolism (VAE) was detected in 7 of 28 subjects (25%), but the severity of which was mild and was not associated with oxygen desaturation. While, there were significant differences in obesity index, preoperative respiratory function, and PaO2 after the induction of anesthesia between the patients with and without oxygen desaturation. Our results suggest that hypoxemia may occur frequently during Cesarean section under general anesthesia, but is not caused by VAE, and is related with the physiological changes associated with pregnancy.
我们研究了全身麻醉下剖宫产术中低氧血症的发生率及原因。28例患者中有6例（21%）出现动脉血氧饱和度降低（≤95%）。28名受试者中有7例（25%）检测到静脉空气栓塞（VAE），但其严重程度较轻，且与血氧饱和度降低无关。然而，发生和未发生血氧饱和度降低的患者在肥胖指数、术前呼吸功能以及麻醉诱导后的动脉血氧分压方面存在显著差异。我们的结果表明，全身麻醉下剖宫产术中低氧血症可能经常发生，但并非由VAE引起，而是与妊娠相关的生理变化有关。
