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Öğe Anesthetic management and endovascular stent grafting of abdominal aortic aneurysm in a patient with Behcet's disease(W B Saunders Co-Elsevier Inc, 2002) Türköz, A; Toprak, IH; Köroglu, A; Durmus, M; But, AK; Ersoy, MÖ[Abstract Not Available]Öğe Antioxidant properties of propofol and erythropoietin after closed head injury in rats(Pergamon-Elsevier Science Ltd, 2005) Ozturk, E; Demirbilek, S; But, AK; Saricicek, V; Gulec, M; Akyol, O; Ersoy, MOReactive oxygen species play a role during brain injury due to closed head trauma. Enzymatic or nonenzymatic antioxidants may protect brain tissue against oxidative damage. The present study was performed to assess the changes of endogenous indices of oxidative stress in serum from rats subjected to head trauma and whether treatment with propofol and/or erythropoietin (EPO) modifies the levels of endogenous indices of oxidative stress. For these purposes, female Wistar Albino rats were divided into five groups: nontraumatic sham group, trauma performed control, trauma with propofol (i.p.), trauma with EPO (i.p.) and trauma with propofol and EPO performed study groups. At the end of the experimental procedure, blood was taken by cardiac puncture to determine superoxide dismutase (SOD) and xanthine oxidase (XO) activities as well as malondialdehyde (MDA) and nitric oxide (NO) levels in serum. Serum NIDA level of control traumatic brain injury (TBI) group was significantly higher than sham operation group (p < 0.012). Serum NIDA levels in propofol, EPO and propofol+EPO groups were found to be decreased in comparison with control group (p < 0.039, p < 0.030 and p < 0.018, respectively). Serum NO level was found to be increased in TBI group, but difference was not statistically significant when compared to sham-operated group (p=0.092). Propofol, EPO and propofol+EPO administration efficiently reduced serum NO levels to reach sham-operated group (p < 0.002, p < 0.001 and p < 0.015, respectively). These results suggested that acute administration of both propofol and EPO altered the indices of oxidative stress similarly against brain injury due to trauma. (c) 2005 Elsevier Inc. All rights reserved.Öğe The effects of magnesium sulphate on sevoflurane minimum alveolar concentrations and haemodynamic responses(Cambridge Univ Press, 2006) Durmus, M; But, AK; Erdem, TB; Ozpolat, Z; Ersoy, MOBackground and objective: Magnesium administered before anaesthesia induction results in a significant reduction in intravenous anaesthetic consumption. The purpose of this study was to evaluate whether the dose of intravenous magnesium sulphate reduces the minimum alveolar anaesthetic concentration of sevoflurane for endotracheal intubation (MACE,) and skin incision (MAC), and attenuates haemodynamic responses. Methods: We studied 60 patients who were scheduled for elective surgery. Patients were not premedicated before induction of anaesthesia and were randomly assigned to receive intravenous saline 0.9% (Group I, n = 20) or magnesium sulphate 30 mg kg(-1) bolus + 10mg kg(-1) h(-1) continuous infusion (Group II, n = 20) or 50 mg kg(-1) bolus + 10 mg kg(-1) h(-1) continuous infusion (Group III, n = 20). Results: Median and 95% confidence limits for sevoflurane MAC(EI) were 2.68 (2.48-2.85), 2.88 (2.70-3.06) and 2.96 (2.70-3.16), and for sevoflurane MAC were 2.08 (1.76-2.40), 2.26 (2.08-2.47) and 2.40 (2.19-2.68) in Groups 1, 11 and 111, respectively. The differences in MACEI and MAC among groups were not statistically significant, except Group III in MAC study (P < 0.05). Mean arterial pressures and heart rate did not increase in Groups II and III after endotracheal intubation and skin incision. Conclusions: Magnesium sulphate administered before induction of anaesthesia increases MAC of sevoflurane and reduces cardiovascular responses to intubation.Öğe Hemodynamic, hepatorenal, and postoperative effects of desflurane-fentanyl and midazolam-fentanyl anesthesia in coronary artery bypass surgery(W B Saunders Co-Elsevier Inc, 2005) But, AK; Durmus, M; Toprak, HI; Ozturk, E; Demirbilek, S; Ersoy, MOObjective: The purpose of this study was to compare the hemodynamic, hepatorenal, and postoperative effects of desflurane-fentanyl and midazolam-fentanyl anesthesia during coronary artery bypass surgery. Design: Prospective study. Setting: University hospital. Participants: Sixty patients undergoing elective coronary artery bypass grafting surgery with ejection fraction more than 45%. Interventions: Anesthesia was induced with etomidate, 0.2 mg/kg, and fentanyl, 5 mu g/kg, in group D (n = 30) and with midazolam, 0.1 to 0.3 mg/kg, and fentanyl, 5 mu g/kg, in group M (n = 30). Anesthesia was maintained with desflurane, 2% to 6%, and fentanyl, 15 to 25 mu g/kg, in group D and midazolam infusion, 0.1 to 0.5 mg/kg/h, and fentanyl, 15 to 25 mu g/kg, in group M. Measurements and Main Results: Hemodynamic monitoring included a 5-lead electrocardiogram, a radial artery catheter, and a pulmonary artery catheter. Data were obtained before induction of anesthesia (t(0)), after induction of anesthesia (t(1)), after intubation (t(2)), after surgical incision (t(3)), after sternotomy (t(4)), before cardiopulmonary bypass (t(5)), after protamine infusion (t(6)), and at the end of the surgery (t(7)). Blood samples were obtained to measure total bilirubin, aspartate aminotransferase, gamma glutamyl transferase, lactate dehydrogenase, alkaline phosphatase, creatinine, and blood urea nitrogen just before induction of anesthesia and at the first, fourth, and 14th days postoperatively. Conclusions: Intraoperative hemodynamic responses were similar in both groups, and transient hepatic and renal dysfunctions were observed in the postoperative period in both groups. The extubation and intensive care unit discharge times were found to be shorter in the desflurane-fentanyl group. (c) 2005 Elsevier Inc. All rights reserved.Öğe Sedative, haemodynamic and respiratory effects of dexmedetomidine in children undergoing magnetic resonance imaging examination: preliminary results(Elsevier Sci Ltd, 2005) Koroglu, A; Demirbilek, S; Teksan, H; Sagir, O; But, AK; Ersoy, MOBackground. We evaluated the sedative, haemodynamic and respiratory effects of dexmedetomidine and compared them with those of midazolam in children undergoing magnetic resonance imaging (MRI) procedures. Methods. Eighty children aged between 1 and 7 yr were randomly allocated to receive sedation with either dexmedetomidine (group D, n=40) or midazolam (group M, n=40). The loading dose of the study drugs was administered for 10 min (dexmedetomidine 1 mu g kg(-1) or midazolam 0.2 mg kg(-1)) followed by continuous infusion (dexmedetomidine 0.5 mu g kg(-1) h(-1) or midazolam 6 mu g kg(-1) min(-1)). Inadequate sedation was defined as difficulty in completing the procedure because of the child's movement during MRI. The children who were inadequately sedated were given a single dose of rescue midazolam and/or propofol intravenously. Mean arterial pressure (MAP), heart rate (HR), peripheral oxygen saturation (Sp(o2)) and ventilatory frequency (VF) were monitored and recorded during the study. Results. The quality of MRI was significantly better and the rate of adequate sedation was higher in group D than in group M (P < 0.001). In group D, the requirement for rescue drugs was lower and the onset of sedation time was shorter than in group M (P < 0.001). MAP, HR and VF decreased from baseline during sedation in both groups (P < 0.001). Conclusions. Dexmedetomidine provided adequate sedation in most of the children aged 1-7 yr without haemodynamic or respiratory effects during MRI procedures.
