tailieunhanh - Báo cáo y học:" is supra-ventricular arrhythmia a reason for the bad performance of the FlowTrac device"

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: Is supra-ventricular arrhythmia a reason for the bad performance of the FlowTrac device? | Available online http content 11 1 406 Letter Is supra-ventricular arrhythmia a reason for the bad performance of the FlowTrac device Andreas Umgelter Wolfgang Reindl Roland M Schmid and Wolfgang Huber II Medizinische Klinik und Poliklinik Klinikum rechts der Isar der Technischen Universitat Munchen IsmaningerstraBe 22 81644 Munchen Germany Corresponding author Andreas Umgelter Published 12 February 2007 This article is online at http content 11 1 406 2007 BioMed Central Ltd Critical Care 2007 11 406 doi cc5154 See related research by Sander et al. http content 10 6 R164 In their recent paper evaluating arterial waveform analysis as a tool to measure cardiac output CO Michael Sander and colleagues do not provide data on the heart rhythms of their cardiac surgery patients 1 . As the FloTrac Flowtrac Vigileo Edwards Lifescience Munich Germany device calculates CO from an arterial pressure-based algorithm integrating vessel compliance and peripheral resistance effects it seems plausible that these measurements may be influenced by cardiac arrhythmia. We recently treated a septic patient with atrial fibrillation who in addition to monitoring with the FlowTrac device received a pulmonary artery catheter because of a suspicion of right ventricular failure. The patient was on pressure-controlled mechanical ventilation. We found no significant correlation between simultaneous measurements performed with the pulmonary artery catheter and measurements performed with the FlowTrac device r P . Bland-Altman analysis showed a mean bias of l min and limits of agreement of and l min Figure 1 . This finding is in keeping with the results of a pilot study assessing the FloTrac system which found worse correlations between waveformbased measurements of CO and thermodilution-derived CO for patients with atrial fibrillation as compared to patients with sinus rhythm 2 . In Sanders and .