Drain C B
Virginia Commonwealth University, School of Allied Health Professions, Richmond, USA.
CRNA. 1996 Nov;7(4):181-92.
The pathophysiology of the respiratory system can be viewed by simply evaluating the status of a functional residual capacity (FRC). More specifically, patients with airways that are characterized as extremely compliant or "floppy" will have an increased FRC, which is the hallmark of chronic obstructive pulmonary disease. Patients with noncompliant, "stiff" lungs suffer from a form of restrictive disease with a resultant reduction in the FRC. Hence, the implications for anesthesia care focus on the FRC; that is, raising the FRC in the restrictive disease patient and normalizing or preventing further increase in the FRC in the patient with chronic obstructive pulmonary disease.
呼吸系统的病理生理学可以通过简单评估功能残气量（FRC）的状态来观察。更具体地说，气道表现为极度顺应性或“松弛”的患者，其功能残气量会增加，这是慢性阻塞性肺疾病的标志。肺顺应性差、“僵硬”的患者患有某种形式的限制性疾病，导致功能残气量减少。因此，麻醉护理的重点在于功能残气量；也就是说，提高限制性疾病患者的功能残气量，并使慢性阻塞性肺疾病患者的功能残气量正常化或防止其进一步增加。
