5Pandit JJ,DuncanT,Robbins PA.Total oxygen uptake with two maximal breathing techniques and the tidal volume breathing technique:a physiologic study of preoxygenation.Anethesiology,2003,99:841-846.
6Nimmagadda U,Chiravuri SD,Salem MR,et al.Preoxygenation with tidal volume and deep breathing techniques:the impact of duration of breathing and fresh gas flow.Anesth Analg,2001,92:1337-1341.
7Paris A A,Poster CM,Wilmore DW,et al.Radiologic visualization of neck vessels in healthy men.Neurology,1963,13:386-396.
8Brautaset NJ,Provokable bilateral vertebral artery compr-ession diagnosed with transcranial Doppler.Stroke,1992,23:288-291.
