Cardiac Output Monitoring: Comparison of a New Arterial Pressure Waveform Analysis to the Bolus Thermodilution Technique in Patients Undergoing Off-Pump Coronary Artery Bypass Surgery

An Observational Comparative Study of Cardiac Index Estimated By FloTrac and Intermittent Thermo Dilution in Off-Pump Coronary Artery Bypass Grafting

“…However the major limitation in the study by Opdam was that 66% of all the calculations were done in only one patient. Mehta et al compared the CO values estimated by FloTrac and ITD in 12 patients undergoing OPCABG at various time points and concluded that good agreement existed between the 2 techniques [11]. However, the percentage error found in this study was 29% that is again closer to the accepted limit of 30%.…”

“…Most of the pulse contour analysis techniques are explicitly or implicitly based on this Windkessel model [11]. In 2005, Edwards Life sciences introduced a novel device naming FloTrac for arterial pressure waveform CO estimation [10].…”

“…The FloTrac analysis algorithm does its own calibration based on patient demographics and waveform characteristics [9]. Possible limitations of this device may be the inability to measure CO in situations of arterial wave artifacts, aortic incompetence, and severe peripheral vasoconstriction, compromise of arterial catheter and irregular pulse as in dysrhythmias and concomitant use of IABP [11].…”

“…The drawbacks include inability to provide other hemodynamic parameters as measured by PAC and limitation of its use in situations of arterial wave artifacts, aortic incompetence, severe peripheral vasoconstriction, irregular pulse and patients on IntraAortic Balloon Pump (IABP) [11].…”

Comparison of cardiac output measurements obtained through thermo dilution method and arterial pressure wave analysis in patients undergoing cardiopulmonary bypass graft surgery

“…Ayrıca, sistem, basınç dalgasının sinyalinde ve şeklinde bozulmalara neden olan arteriyel spazm, diseksiyon, arteriyel kateterin kıvrılması, arteriyel hatların kıvrılması, hatlarda yükseltici veya alçaltıcı titreşimler gibi faktörlerden etkilendiği için arteriyel kateter girişiminin zorunluluğunun aletin doğruluğunu sınırladığını vurgulamışlardır. [10] Mehta ve ark., [11] FloTrac/Vigileo sistem ile termodilüsyon yöntemini atan kalpte koroner baypas cerrahisi yapılan hastalarda karşılaştırmışlar ve sekiz ayrı zaman diliminde yaptıkları ölçümlerde bütün dönemlerde pozitif korelasyon ve iyi bir uyum elde etmişlerdir.…”