A new closed-system using partially frozen injectate for thermodilution cardiac output determinations

Journal of Anesthesia
H MarutaK Numata

Abstract

The FI (partially frozen injectate) system, a new closed-system devised by the authors for thermodilution cardiac output determinations, has two major features: 1) it needs no ice-filled receptacle to keep injectate cold because it uses partially frozen injectate, and 2) it can go without monitoring the injectate temperatures during the whole process of cardiac output determinations. The author evaluated the accuracy and reproducibility of cardiac output determinations with the FI system in 10 critically ill patients, as compared with another closed-system (which is commercially available) and the standard open method. The injectate temperatures in the FI system were also measured in vitro. The mean injectate temperature in the FI system was 0.71 +/- 0.26 degrees C and 80% of the injectate temperatures were lower than 1.0 degrees C. Even when no monitoring of injectate temperatures was made, the predicated error in the calculated cardiac output resulted as low as 2% with the FI system. The mean cardiac output values were not statistically different between the FI system and the other two systems.

References

Aug 1, 1976·Anesthesiology·N Buchbinder, W Ganz
Mar 27, 1975·The New England Journal of Medicine·R D WeiselH B Hechtman
Apr 19, 1985·JAMA : the Journal of the American Medical Association·J H StevensC W Stetz
Feb 1, 1972·The American Journal of Cardiology·W Ganz, H J Swan
May 1, 1971·Journal of Applied Physiology·H U WesselA R Grahn
Jun 1, 1981·Critical Care Medicine·J R PlachetkaJ G Copeland

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Citations

Aug 19, 2009·American Journal of Critical Care : an Official Publication, American Association of Critical-Care Nurses·Elissa WalshTracey Ash

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