測量CVP時評估volume時，是否要扣掉PEEP ??? 影響多大？

delta pleural pressure = PEEP * (C lung/(C lung + C chest wall))
CVP: central venous pressure; PEEP: positive end-expiratory pressure

呼气末正压对机械通气患者中心静脉压及髂总静脉压的影响

http://g.wanfangdata.com.hk/D/Periodical_zgwzbjjyx200806007.aspx
Effect of positive end-expiratory pressure on central venous pressure and common iliac venous pressure in mechanically ventilated patients
http://www.ncbi.nlm.nih.gov/pubmed/18549712

參考這篇中國期刊
PEEP 0, 5, 10 cmH2O時，
CVP level 分別是 4.6, 5.3, 6.1 mmHg


很實用的資料！


The Hoover's Sign of Pulmonary Disease

http://www.clinicalmolecularallergy.com/content/pdf/1476-7961-6-8.pdf



在obstructive lung disease, RV並非決定在chest wall, lung recoil, or expiratory muscle strengh，而是決定在airway closure !!!