Overestimation of low cardiac output measured by thermodilution
| Autor: | D Chassard, J P Tournadre, R Muchada |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
medicine.medical_specialty
Cardiac output Electromagnetics Thermodilution Cardiac Output Low Hemodynamics Aorta Thoracic Pulmonary Artery Bolus (medicine) Dogs medicine.artery Internal medicine Heart rate Medicine Animals End-systolic volume business.industry Blood flow Echocardiography Doppler Cold Temperature Anesthesiology and Pain Medicine Descending aorta Hemorheology Cardiology business Electromagnetic Phenomena Echocardiography Transesophageal |
| Zdroj: | British journal of anaesthesia. 79(4) |
| ISSN: | 0007-0912 |
| Popis: | We have investigated the influence of a cold water bolus (CWB) injection on overestimation of cardiac output (CO) in low CO states in anaesthetized dogs. CO was measured using three methods: (1) thermodilution (TD), (2) electromagnetic (EM) flow meter placed on the pulmonary artery and (3) transoesophageal echo-Doppler (OD) placed on the descending aorta. Measurements of CO were obtained before (steady state) and after induction of a low CO state with thiopentone 5 mg kg-1 i.v. After CWB injection, mean CO measured by EM and OD increased by 26% and 27%, respectively (P0.05) during steady state, and by 85% and 75% (P0.05) during the low CO state. This transient increase was produced by an increase in stroke volume, while heart rate did not change. Frank Starling's law may explain this variation by a sudden increase in preload produced by CWB injection. These results indicate that thermodilution overestimated CO during low CO states when CWB injection was used. |
| Databáze: | OpenAIRE |
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