Dresser L P, McKinney W M
Am J Surg. 1987 Aug;154(2):220-4. doi: 10.1016/0002-9610(87)90185-1.
The results of anatomic and hemodynamic studies of the human internal jugular valve, which is the only venous valve between the right atrium of the heart and the brain, have been reported. Tricuspid internal jugular valves were present in two cadaver subjects without any observed compromise in competency. Most valves tested were competent, with the exception of those from one cadaver which were apparently congenitally incompetent. Acquired or congenital internal jugular valve incompetence may impair cerebral venous return, especially when intrathoracic pressure is increased by positive-pressure ventilation. Screening for internal jugular valve incompetence with a Doppler flowmeter before utilizing this type of mechanical ventilation may help prevent the deleterious effects of cerebral venous congestion.
人体颈内静脉瓣是心脏右心房与大脑之间唯一的静脉瓣，其解剖学和血流动力学研究结果已有报道。在两具尸体标本中发现有三尖瓣型颈内静脉瓣，其功能未见任何受损。除了一具尸体的瓣膜明显先天性功能不全外，大多数测试的瓣膜功能正常。获得性或先天性颈内静脉瓣功能不全可能会损害脑静脉回流，尤其是在正压通气使胸内压升高时。在使用这种机械通气之前，用多普勒流量计筛查颈内静脉瓣功能不全可能有助于预防脑静脉充血的有害影响。
