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在很多情况下可发生静脉气栓,包括头颈部手术(五官、神经科为主)在内,原因如下表: 高度警惕时,可迅速发现并予以适当处置,故各科医务人员必须很好了解之。一、发病: 空气可通过正压驱迫,或呼吸负压吸引而进入静脉,随血流入右心,堵塞肺动脉流出道。血与空气滞集右室,随心搏“搅拌”形成泡沫,更妨碍血液通过右心;因“搅拌”析出纤维素,渗入肺动脉末端,使病情更趋复杂。肺小动脉血液被气泡取代,气体交换减少。肺内动静脉吻合支大量开放,动静脉短路加重
In many cases, venous air embolism can occur, including head and neck surgery (facial features, neurology mainly), the following table: High alert, it can be quickly found and be properly disposed, so the medical staff must be very good Understand it. First, the incidence: the air can be driven by positive pressure, or breathing negative pressure to attract and enter the vein, with blood flow into the right heart, blocked pulmonary artery outflow tract. Blood and air hysteresis in the right ventricle, with heart beat “stirring” to form a bubble, but also impede the blood through the right heart; due to “stirring” precipitation of cellulose, infiltration of the pulmonary artery end, so that the disease more complex. Pulmonary arterioles replaced by air bubbles, gas exchange decreased. Pulmonary arteriovenous anastomotic branch a large number of open, arteriovenous short circuit increase