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Báo cáo y học: "Self-calibrating pulse contour cardiac output: do validation studies really show its clinical reliability"

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: Self-calibrating pulse contour cardiac output: do validation studies really show its clinical reliability? | Available online http ccforum.eom content 13 2 123 Commentary Self-calibrating pulse contour cardiac output do validation studies really show its clinical reliability Lester AH Critchley Department of Anaesthesia and Intensive Care The Chinese University of Hong Kong Prince of Wales Hospital Shatin New Territories Hong Kong China Corresponding author Lester AH Critchley hcritchley@cuhk.edu.hk Published 4 March 2009 This article is online at http ccforum.com content 13 2 123 2009 BioMed Central Ltd See related research by Senn et al. http ccforum.com content 13 2 R32 Abstract The present study was performed to test a new software version of the FloTrac Vigileo using head-up-head-down tilting in postcardiac surgery patients. Impressive improvements in Bland and Altman limits of agreement from 37.5 to 21.6 were recorded. The results however could be attributed to a failure to produce a wide enough range of test circulatory conditions. A more rigorous test of performance is needed before any real conclusion concerning use of the FloTrac Vigileo in clinical practice can be made. In the current issue Senn and colleagues present their findings 1 from a study aimed at validating a new version of the FloTrac Vigileo monitor Edward Lifesciences Irvine CA USA a system that measures cardiac output using the arterial pulse contour method. The pulse contour method is relatively new on the cardiac output measurement scene. The method was first used commercially in the Finapres Ohmedia Englewood CO USA a device that used a pneumatic finger cuff to continuously measure blood pressure. By transforming the pressure wave into a flow wave cardiac output was measured from the area under the flow curve. In the past few years a number of pulse contour methods based on the arterial line pressure trace have been developed. The most well known of these methods are the PiCCO Pulsion Medical Systems Munich Germany the LiDCO LiDCO Group Plc London UK and the FloTrac Vigileo. Until recently .