Journal of cardiothoracic and vascular anesthesia
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J. Cardiothorac. Vasc. Anesth. · Jun 1997
Randomized Controlled Trial Clinical TrialEffect of pump flow rate on cerebral blood flow during hypothermic cardiopulmonary bypass in adults.
The purpose of this study was to examine the effect of cardiopulmonary bypass flow rate on cerebral blood flow and cerebral metabolic rate for oxygen during hypothermic (27 degrees C) cardiopulmonary bypass. ⋯ Brain oxygenation is well maintained at lower than conventional pump flow levels during CPB. There may be practical advantages to reduced flows during hypothermia, and flow reductions do not appear to adversely affect cerebral blood flow or metabolism.
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J. Cardiothorac. Vasc. Anesth. · Jun 1997
Comparative StudyContinuous intraoperative noninvasive cardiac output monitoring using a new thoracic bioimpedance device.
To compare a new noninvasive bioimpedance device with the standard thermodilution method during the intraoperative period in high-risk patients undergoing oncological surgery. ⋯ This new impedance device is a safe, reliable, clinically acceptable alternative to the invasive thermodilution method in the operating room environment.
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J. Cardiothorac. Vasc. Anesth. · Jun 1997
The effects of pulsatile cardiopulmonary bypass on cerebral and renal blood flow in dogs.
The purpose of this study was to determine the effects of pulsatility on cerebral blood flow, cerebral metabolism, and renal blood flow over a range of cardiopulmonary bypass temperature and flow conditions. ⋯ Pulsatility has no significant effect on cerebral or renal perfusion over a broad range of cardiopulmonary bypass temperature and flow conditions. Cerebral blood flow and metabolism were functions of temperature but not pulsatility or flow rate. Renal blood flow was affected by both temperature and cardiopulmonary bypass flow rate but not by pulsatility. Finally, central nervous system perfusion may be preserved under low-flow cardiopulmonary bypass conditions by shunting of perfusion from splanchnic vascular beds.
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J. Cardiothorac. Vasc. Anesth. · Jun 1997
Randomized Controlled Trial Comparative Study Clinical TrialGlucose versus lactated Ringer's solution during pediatric cardiac surgery.
Whether intraoperative fluid infusion should contain glucose during pediatric cardiac surgery remains controversial. This study was performed to compare the effects of glucose and glucose-free solutions on blood glucose and blood insulin levels during total repair of congenital heart diseases. ⋯ Glucose withdrawal during pediatric cardiac surgery induces threatening hypoglycemia during the prabypass period, and moderate intraoperative glucose administration (2.5 mg/kg/min) is not responsible for major hyperglycemia.
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J. Cardiothorac. Vasc. Anesth. · Jun 1997
Comparative StudyEvaluation of the accuracy and response time of STAT-mode continuous cardiac output.
This study was conducted to compare continuous cardiac output (CCO) with bolus thermodilution cardiac output (BTD) at steady state, and to compare the response time of STAT CCO with that of trend CCO, mean arterial pressure, and mixed venous oxygen saturation [SvO2] during an acute hemodynamic change. ⋯ STAT and trend CCO are accurate and precise and show close agreement with BTD cardiac output at steady state. The faster algorithm of STAT CCO offers some advantage over trend CCO during an acute hemodynamic change. However, because of the averaging process for determining CCO, the response time of STAT CCO is slower than that of mean arterial pressure and SvO2.