tailieunhanh - Báo cáo khoa học: " Estimation of pulmonary capillary pressure: different methods for different pathophysiological processes"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care giúp cho các bạn có thêm kiến thức về ngành y học đề tài: Estimation of pulmonary capillary pressure: different methods for different pathophysiological processes? | Available online http content 9 2 143 Commentary Estimation of pulmonary capillary pressure different methods for different pathophysiological processes Silvia Nunes Department of Anesthesiology and Intensive Care Tampere University Hospital Tampere Finland Corresponding author Silvia Nunes Published online 17 February 2005 This article is online at http content 9 2 143 2005 BioMed Central Ltd Critical Care 2005 9 143-144 DOI cc3060 See related research by Souza et al. in this issue http content 9 2 R132 Abstract In the absence of a direct method with which to measure pulmonary capillary pressure in humans various methods for analyzing the pulmonary artery pressure decay following balloon occlusion have been described. In this issue of Critical Care Souza and coworkers investigate the adequacy of these methods for assessing various pathophysiological processes. They studied patients presenting with pathologies characterized by different distributions of pulmonary vascular resistance. Their findings suggest that no single method for estimating pulmonary capillary pressure is adequate for all disease processes. In healthy individuals pulmonary vascular resistance is low and is mostly located within the pulmonary arterial bed. In the absence of significant venous resistance pulmonary capillary pressure PCP is very close to the pulmonary arterial occlusion pressure. Under these circumstances pulmonary arterial occlusion pressure may be used as a surrogate for the pressure determining filtration from the capillaries to the interstitium PCP . However this is no longer the case when pulmonary venous resistance is increased as may occur in pulmonary hypertension of various aetiologies acute lung injury ALI and acute respiratory distress syndrome ARDS . In these patients PCP must be estimated by analyzing the pulmonary arterial pressure decay after pulmonary artery occlusion. Souza and coworkers 1 used this .