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Showing 1 to 18 of 18 for “"thermodilution"”.
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An Evaluation of the Thermodilution Method for Measuring Ventricular Volumes.
Accurate size information on a living heart is essential for an in-depth study of its cardiac function. A review of the literature since the turn of the century reveals the great amount of effort that has been expended in the search for better ways to measure heart size. Starling’s law relates …
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Determination of cardiac output across a range of values in horses by M-mode echocardiography and thermodilution
… compared with simultaneous determinations by thermodilution in 2 conscious and 5 anesthetized horses. A range of cardiac outputs was induced by use of a pharmacological protocol (dopamine, 4 ug/kg/min, dobutamine, 4 ug/kg/min, and 10 ug/kg detomidine plus 20 ug/kg butorphanol, in sequence). …
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Investigating the Fidelity of Classic Cardiovascular Metrics in the Context of a Failing and Mechanically Supported Heart
… concerns about their reliability. This work used thermodilution, the gold standard method for measuring a patient’s cardiac output, as well as a newly developed MCS-based method, to explore under what conditions traditional metrics are impacted by MCS. Data from porcine studies and clinical trials …
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Enalaprilat Improves Systemic and Mesenteric Blood Flow During Normotensive Resuscitation from Hemorrhagic Shock in Dogs
… during resuscitation were investigated. Thermodilution-based and ultrasound-based methods of monitoring the systemic blood flow were also examined. Animals were hemorrhaged to a mean arterial pressure (MAP) of 40-45mmHg for 30min then 30-35mmHg for 30min followed by resuscitation with …
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Cardiac output estimation using arterial blood pressure waveforms
… invasive indicator-dilution methods such as thermodilution via Swan-Ganz lines, which carry risks. Over the past century, the premise that CO could be estimated by analysis of the arterial blood pressure (ABP) waveform has captured the attention of many investigators. This approach of …
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Haemodynamic consequences of Spinal Anaesthesia for non-emergency Caesarean section
… study was performed comparing this method with thermodilution in patients with postpartum complications of preeclampsia. Abstract viii The results of these studies showed that: The pulse wave form monitor employed showed acceptable limits of agreement with the thermodilution method. Crystalloid …
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Validation of a new method of determining cardiac output in neonatal foals
… in adult horses. We compared this method to thermodilution in isoflurane anesthetized, 30 to 42 hour old foals and found good agreement (mean bias 0.0474L/min; limits of agreement -3.03 to 3.12) between the two methods in a range of cardiac outputs from 5.4 to 20.4 liters/min. The lithium …
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Validation of tissue oxygen saturation determined by near-infrared spectroscopy in canine models of hypoxemia and hemorrhagic shock
… states. In each phase dogs were instrumented for thermodilution cardiac index (CI) and sartorius muscle StO2. Data collected included hemoglobin concentration, heart rate (HR), MAP, CI, StO2. Arterial oxygen content and DO2I were calculated at each time point. Data analysis included Pearson's …
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Cardiac output estimation from arterial blood pressure waveforms using the MIMIC II database
… for Intensive Care (MIMIC) II database. Thermodilution CO (TCO) was the gold standard, and a total of 121 records with 1,497 TCO measurements were used. Six lumped-parameter and systolic area CO estimators were tested, using ABP features and a robust heart rate (HR) estimate. Signal …
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The role of early management and hormone replacement therapy in potential heart and lung donors
… donor lung water accumulation. Measurement of thermodilution lung water index predicted ultimate lung suitability for transplantation and recipient outcome. Conclusion Early donor management is the cornerstone to improve the donor heart function and to increase the lung retrieval rate. It may …
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Continuous estimation of cardiac output and arterial resistance from arterial blood pressure using a third-order Windkessel model
… left ventricle. CO is monitored via intermittent thermodilution measurements which are highly invasive and only applied to the sickest ICU patients. The lack of frequent CO measurements has encouraged researchers to develop estimation methods for cardiac output from routinely measured arterial …
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Accuracy of Noninvasively Determined Pulmonary Artery Pressure in Dogs With Myxomatous Mitral Valve Disease
… for at least one month. A flow-directed thermodilution monitoring catheter was percutaneously placed in the right jugular vein and advanced to the main pulmonary artery. Pulmonary arterial systolic pressure was recorded through this catheter connected to a pressure-transducer and data …
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Hemodynamic outcomes of weaning intraaortic balloon counterpulsation in heart failure
… cardiac output (CCO, p=0.03) and bolus thermodilution cardiac output (COTD, p=0.02) compared to volume weaning. Groups were not significantly different with regards to weaning responses during the second period of weaning. While tests for carryover were not statistically significant, …
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Invasive Physiologic Assessment of Myocardial Viability After Primary Angioplasty in Acute Myocardial Infarction: Comparison With FDG-PET Imaging
… sensor-tipped coronary wire, thermodilution-derived CFR (CFRthermo), fractional flow reserve (FFR) and coronary wedge pressure (Pcw) were measured and the ratio of Pcw and mean aortic pressure (Pcw/Pa) was calculated, along with index of microcirculatory resistance (IMR), …
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Ventilation liquidienne totale et syndrome d'aspiration méconiale sévère
… sang (GDS) et les paramètres hémodynamiques par thermodilution (Pulsion medical system, Ger). Un SAM sévère fut alors induit à l'aide de l'instillation de 2 aliquotes de 1mL/kg d'une dilution à 25% de méconium humain dans le salin. Les agneaux ont ensuite été randomisés dans deux groupes : …
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Αιμοδυναμικές και αναπνευστικές επιδράσεις της θειϊκής πρωταμίνης σε σχέση με την οδό και τον ρυθμό χορήγησης: Πειραματική μελέτη
… pressure monitoring and blood sampling. A thermodilution pulmonary artery catheter was inserted through the left femoral vein for calculation of cardiac output, measurement of pulmonary vascular pressures and sampling of mixed venous blood. Through the ventilatory circuit, end-tidal CO₂ and …
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Validation of first pass magnetic resonance myocardial perfusion imaging using fractional flow reserve
… microcirculatory disease as determined by thermodilution derived CFR. Our other aims included an analysis of troponin release following PCI and its relation to QCA, pressure wire data and the occurrence of new late gadolinium enhancement (LGE). New LGE post CABG was also quantified and …
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Conséquences hémodynamiques de l'application de la Ventilation Liquidienne Totale (VLT) dans un modèle expérimental de syndrome de détresse respiratoire aigue (SDRA) chez l'agneau nouveau-né
… paramètres hémodynamiques par la méthode de thermodilution pulmonaire et transpulmonaire. Pour cette étude un modèle expérimental de SDRA basé sur le lavage des poumons avec du HCI pour créer une blessure alvéolaire significative a été utilisé. Après le lavage les agneaux ont été randomisés …