The measurement of cardiac output (CO) and hemodynamic pressures are vital for proper management of severely hemodynamic compromised patients. A new ultrasound dilution method (COstatus) for cardiac output measurement has been developed.
The thermodilution technique with a pulmonary artery catheter has been the standard in adult patients for cardiac output measurement. However, using pulmonary artery catheter remains a major clinical problem in children due to technical and size constraints. COstatus measures changes in blood ultrasound velocity in an extracorporeal AV loop caused by body-temperature isotonic saline injected into the central vein and calculates cardiac output derived from a dilution curve.
Study Type
OBSERVATIONAL
Enrollment
33
Children Hospital, BUS, BIVA
Lund, Sweden
Measurement of cardiac output by a new ultrasound dilution method in mechanically ventilated children after pediatric cardiac surgery.
To compare cardiac outputs measured with this new ultrasound dilution method with flowmetry (perivascular probe) using ultrasound transit time measured directly on the aorta in children \< 15 kg of weight. Also to assess reliability of COstatus measurements in pediatric patients.
Time frame: Measurements are made during a patient's stay with insitu catheters. The expected average stay is 3-4 days.
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