Perfusion
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Randomized Controlled Trial Comparative Study
Propofol requirement titrated to bispectral index: a comparison between hypothermic and normothermic cardiopulmonary bypass.
Though propofol requirement is expected to decrease during cardiopulmonary bypass (CPB), a few studies have failed to demonstrate this. The factors affecting pharmacokinetics of propofol and, therefore, the requirement, are different during hypothermic and normothermic CPB. We evaluated and compared the requirement of propofol during hypothermic and normothermic CPB. ⋯ The BIS (median +/- inter quartile range) remained constant during normothermic CPB (50 +/- 8.8), but declined significantly during hypothermic CPB (41 +/- 5.6) despite decreased usage of propofol during hypothermia. No patient had recall of intra-operative events. CPB decreases the magnitude of propofol requirements and the effect of hypothermic CPB is significantly more than that of normothermic CPB.
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Randomized Controlled Trial
Beneficial effects of modern perfusion concepts in aortic valve and aortic root surgery.
Minimized perfusion circuits (MPC) were found to reduce side effects of standard extracorporeal circulation (ECC). We evaluated the safety and efficacy of the ROCsafe MPC for aortic valve and aortic root surgery. One hundred and seventy patients were randomized for surgery using either MPC [n = 85, 30 female/55 male, mean age: 69.8 +/- 11.8 years; aortic valve replacement (AVR): n = 40; AVR + coronary artery bypass graft (CABG): n = 31; David operation: n = 3; aortic root replacement (ARR): n = 11] or ECC [n = 85, 29 female/56 male, mean age: 67.7 +/- 9.5 years; AVR: n = 39; AVR+CABG: n = 35, David operation: n = 2; ARR: n = 9]. ⋯ One stroke occurred in each group. The ROCsafe MPC provides safe circulatory support for a wide range of aortic valve surgeries. Transfusion requirements, postoperative bleeding and length of ICU stay were markedly reduced compared to standard extracorporeal perfusion.
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Clinical Trial
Bicarbonate-buffered ultrafiltration during pediatric cardiac surgery prevents electrolyte and acid-base balance disturbances.
Pediatric cardiopulmonary bypass is still a challenge because of electrolyte disturbances and inflammation. Many investigations deal with different types of hemofiltration to reduce these potentially harmful side effects. We tested the hypothesis of whether bicarbonate-buffered hemofiltration of the priming solution minimizes electrolyte and acid-base disturbances during the initiation of cardiopulmonary bypass and whether bicarbonate-buffered hemofiltration performed during cardiopulmonary bypass could reduce cytokine levels. ⋯ In conclusion, this study shows that bicarbonate-buffered ultrafiltration is an efficient, simple and safe method for performing hemofiltration, both of the priming solution and during the entire bypass time. The use of a physiological restitution solution prevents electrolyte and acid-base balance disturbances. The elimination of inflammatory mediators seems to be as effective as other ultrafiltration methods.
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Massive pulmonary embolism (PE) leads to cardiogenic shock and is associated with mortality rates of up to 75%. We report on a 27-year-old mother in childbirth who developed a massive post-partal PE and cardiac arrest. Despite mechanical resuscitation, return of spontaneous circulation (ROSC) could not be achieved. ⋯ By using a newly developed, hand-held ECMO system, systemic blood flow and oxygenation were restored and emergency medical services for advanced surgical treatment (hysterectomy and pulmonary embolectomy) were possible. The patient recovered completely. We assume that this newly developed hand-held ECMO device enables rapid onset mechanical life support and improves the prognosis of patients in fatal conditions.