Gombert R, Ossart M, Milhaud A, Tchaoussoff J, Dessirier J L
Ann Anesthesiol Fr. 1976;17(8):895-902.
During general anesthesia for bronchoscopy, hypoxemia is a major risk, especially in patients with a severe intrapulmonary shunt. With the technique of apnea in pure oxygen, after one hour denitrogentation, and with an intake of 50 liters of oxygen per minute through the bronchoscope, the PaO2 was greater than 400 mm of Hg, but hypercapnia and acidosis occurred. To compensate the latter, five minute sessions of apnea, alternating with two minutes of jet hyperventilation, nevertheless, have the disadvantage of producing a Ventrui phenomena at the proximal end of the bronchoscope, hence a fall in FiO2 which was dangerous in these high risk patients. The authors propose a method so that the Venturi phenomenon, which cannot be prevented, occurs in pure oxygen.
在支气管镜检查的全身麻醉期间，低氧血症是一个主要风险，尤其是在患有严重肺内分流的患者中。采用纯氧下的暂停呼吸技术，经过一小时的去氮处理，并通过支气管镜每分钟输入50升氧气后，动脉血氧分压（PaO2）大于400毫米汞柱，但出现了高碳酸血症和酸中毒。为了补偿后者，采用五分钟的暂停呼吸与两分钟的喷射通气交替进行的方法，然而，这有在支气管镜近端产生文丘里现象的缺点，从而导致吸入氧分数（FiO2）下降，这对这些高危患者来说是危险的。作者提出了一种方法，使无法预防的文丘里现象在纯氧中发生。
