Comparison between lithium dilution and pulse contour analysis techniques for cardiac output measurement in isoflurane anaesthetized ponies: influence of different inotropic drugs

Romifidine as a constant rate infusion in isoflurane anaesthetized horses: a clinical study

“…End‐tidal concentrations of carbon dioxide (F E ′CO 2 ), oxygen (F E ′O 2 ) and isoflurane (F E ′ISO) were measured and recorded by a calibrated, methane‐insensitive, multi‐gas analyser (HP M1025B; Hewlett Packard Company, TX, USA) (calibrated once a week). Cardiac output (CO) values were obtained using the lithium dilution technique (LiDCOplus Haemodynamic Monitor; LiDCO Ltd, UK) as previously described for our laboratory (Schauvliege et al. 2009).…”

The hemodynamic effects of medetomidine continuous rate infusions in the dog

“…A potential limitation of these results is the accuracy of arterial pulse power analysis for CO determination in the face of large changes in systemic vascular resistance. This limitation has been demonstrated in several studies including evaluation of the agreement of LiDCO and Pulse CO measurements in ponies receiving inotropes (Schauvliege et al 2009) and dogs with systemic inflammatory response syndrome (Duffy et al 2009), as well as pulse contour analysis after hemorrhage and vasopressor administration (Bein et al 2007) in pigs, which concluded that changes in the pulse contour waveform necessitated recalibration to maintain accuracy. Pulse power analysis converts the pressure data into a power number and also evaluates arterial tree compliance and the reflective waveform from the periphery, which allows for changes in SVRI (Rhodes & Sunderland 2005).…”

Evaluation of the non-calibrated pulse contour cardiac output monitor FloTrac/Vigileo against thermodilution in standing horses

“…By contrast, in a study in ponies receiving vasoactive drugs, PulseCO differed significantly from LiDCO (Schauvliege et al. ). Similarly, PiCCO was found to have lower agreement in neonatal foals (Shih et al.…”

“…A PulseCO study in ponies treated with different cardiovascular active drugs under anaesthesia delivered results that likewise question the use of pulse contour techniques in CO assessments (Schauvliege et al. ). Although it is tempting to derive CO from arterial pulse waves, all techniques are influenced by vascular tone, which is one of the main factors unknown to the clinician.…”

“…Interestingly, the most inaccurate results in comparisons of PulseCO with LiDCO in horses were retrieved in the only study in which the carotid artery was used (Schauvliege et al. ). In further studies, the use of peripheral catheterization is advised, although the pulse power method used by PulseCO has been developed to be less subject to influence by the site of catheterization than the pulse contour method used by PiCCO and FloTrac (Rhodes & Sunderland ).…”