Auerbach D, Flick M R, Block A J
Chest. 1978 Jul;74(1):39-44. doi: 10.1378/chest.74.1.39.
A new cannula with a system of intermittent nasal flow was evaluated and compared with a standard constant-flow nasal cannula in 15 patients with chronic obstructive pulmonary disease. The intermittent-demand cannula released oxygen only when a negative pressure was detected in the nose (negative mode) or when a a positive pressure ceased to be detected in the nose (positive mode). At rates of flow varying from 0.63 to 5.60 L/min, the continuous-flow mode used 9 percent more oxygen than the negative mode and 31 percent more oxygen than the positive mode to achieve comparable improvement in arterial oxygen tension. The system using the intermittent-demand cannula was sensitive and reliable in over 150 hours of testing.
对一种带有间歇性鼻气流系统的新型插管进行了评估，并与标准恒流鼻插管在15例慢性阻塞性肺疾病患者中进行了比较。按需间歇性插管仅在鼻腔检测到负压时（负压模式）或鼻腔不再检测到正压时（正压模式）释放氧气。在流量从0.63升至5.60升/分钟的情况下，恒流模式比负压模式多使用9%的氧气，比正压模式多使用31%的氧气，以实现动脉血氧张力的可比改善。在超过150小时的测试中，使用按需间歇性插管的系统灵敏且可靠。
