The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
S Ribarov - One of the best experts on this subject based on the ideXlab platform.
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lipid peroxidation in rat lung induced by neuroleptanalgesia and its components
European Journal of Anaesthesiology, 1998Co-Authors: S Chinev, R Bakalova, Sabina Kovacheva, S RibarovAbstract:: The aim of the present work was to determine the likelihood of lipid peroxidation in the lungs of rats subjected to neuroleptanalgesia and its components. In particular, the effect of fentanyl, droperidol, a nitrous oxide/oxygen mixture when used separately or in combination, on the lung level of lipid peroxidation was investigated. The in vitro antioxidant properties of fentanyl and droperidol were also tested. Lipid peroxidation was evidenced by the endogenously generated conjugated dienes and fluorescent products of lipid peroxidation and the decrease in lung vitamin E content. It was found that fentanyl and droperidol, used separately or in combination, did not induce lipid peroxidation in the rat lung, while the exposure of rats for 120 min to a nitrous oxide/oxygen mixture (2:1 v/v) led to well-expressed peroxidation. The (N2O + O2)-pro-oxidant action was significantly inhibited in rats previously injected with fentanyl and/or droperidol. The results show that the application of fentanyl, droperidol and (N2O + O2), as in neuroleptanalgesia, ensures minimal lipid peroxidation in the lung. In addition, we found that fentanyl and droperidol were able to inhibit the Fe(2+)-catalysed lipid peroxidation in lung homogenate. We speculate that the inhibitory effect of fentanyl and/or droperidol on the (N2O + O2)-induced lipid peroxidation in the rat lung may be caused directly by their antioxidant properties. However, another explanation seems to be possible. The free radicals that are produced during the metabolism of fentanyl and droperidol may react with the radicals generated during the one-electron reduction of nitrous oxide. Such reactions will obviously reduce the free radical concentration in the organism and, hence, the likelihood of initiating lipid peroxidation.
S Chinev - One of the best experts on this subject based on the ideXlab platform.
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lipid peroxidation in rat lung induced by neuroleptanalgesia and its components
European Journal of Anaesthesiology, 1998Co-Authors: S Chinev, R Bakalova, Sabina Kovacheva, S RibarovAbstract:: The aim of the present work was to determine the likelihood of lipid peroxidation in the lungs of rats subjected to neuroleptanalgesia and its components. In particular, the effect of fentanyl, droperidol, a nitrous oxide/oxygen mixture when used separately or in combination, on the lung level of lipid peroxidation was investigated. The in vitro antioxidant properties of fentanyl and droperidol were also tested. Lipid peroxidation was evidenced by the endogenously generated conjugated dienes and fluorescent products of lipid peroxidation and the decrease in lung vitamin E content. It was found that fentanyl and droperidol, used separately or in combination, did not induce lipid peroxidation in the rat lung, while the exposure of rats for 120 min to a nitrous oxide/oxygen mixture (2:1 v/v) led to well-expressed peroxidation. The (N2O + O2)-pro-oxidant action was significantly inhibited in rats previously injected with fentanyl and/or droperidol. The results show that the application of fentanyl, droperidol and (N2O + O2), as in neuroleptanalgesia, ensures minimal lipid peroxidation in the lung. In addition, we found that fentanyl and droperidol were able to inhibit the Fe(2+)-catalysed lipid peroxidation in lung homogenate. We speculate that the inhibitory effect of fentanyl and/or droperidol on the (N2O + O2)-induced lipid peroxidation in the rat lung may be caused directly by their antioxidant properties. However, another explanation seems to be possible. The free radicals that are produced during the metabolism of fentanyl and droperidol may react with the radicals generated during the one-electron reduction of nitrous oxide. Such reactions will obviously reduce the free radical concentration in the organism and, hence, the likelihood of initiating lipid peroxidation.
Michael R. Jordan - One of the best experts on this subject based on the ideXlab platform.
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Comparison of Fentanyl and Droperidol Mixture (Neuroleptanalgesia II) with Morphine on Clinical Outcomes in Unstable Angina Patients
Cardiovascular Drugs and Therapy, 2000Co-Authors: Piotr Burduk, Maria Piechocka, Marek Bronisz, Maciej Jazdon, Andrzej Żak, Przemysław Guzik, Michael R. JordanAbstract:The objective of the study was to compare the influence of a fentanyl and droperidol mixture (neuroleptanalgesia) with morphine on the in-hospital instability, development of acute myocardial infarction (AMI), and mortality during a 30-day and 12-month follow-up in unstable angina patients. The study was performed in 112 unstable angina patients. In addition to standard therapy for unstable angina (aspirin, heparin, nitroglycerin, and oxygen), 53 patients (63.2 ± 9.7 years; 32 males) were randomized to receive neuroleptanalgesia (0.025 mg fentanyl and 1.25 mg droperidol in a volume of 1 mL) and 59 patients (58.6 ± 11.5 years; 41 males) to receive morphine. Neuroleptanalgesia was started IV with 2 mL and could be followed by 1 mL every 4 hours. Morphine was started IV with 10 mg and could be followed by 5 mg every 4 hours up to angina resolution during 24 hours of hospitalization. Another 1 mL of neuroleptanalgesia or 5 mg of morphine could be administered on demand if angina lasted or reappeared earlier than the next scheduled dose. Odds ratios with 95% confidence intervals (95% CI) adjusted for the age, sex, smoking, previous myocardial infarction, and hypertension were evaluated for all study outcomes. The odds ratios for clinical in-hospital instability (5.93, 95% CI: 2.49–14.15; P = 0.0001), 12-month AMI development (3.57, 95% CI: 1.51–8.45; P = 0.0038), and 12-month mortality (6.00, 95% CI: 1.63–22.09; P = 0.0070) were significantly increased in the neuroleptanalgesia group compared with the patients on morphine. It is concluded that neuroleptanalgesia negatively influences disease course, AMI development, and total mortality in unstable angina patients.
Sabina Kovacheva - One of the best experts on this subject based on the ideXlab platform.
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lipid peroxidation in rat lung induced by neuroleptanalgesia and its components
European Journal of Anaesthesiology, 1998Co-Authors: S Chinev, R Bakalova, Sabina Kovacheva, S RibarovAbstract:: The aim of the present work was to determine the likelihood of lipid peroxidation in the lungs of rats subjected to neuroleptanalgesia and its components. In particular, the effect of fentanyl, droperidol, a nitrous oxide/oxygen mixture when used separately or in combination, on the lung level of lipid peroxidation was investigated. The in vitro antioxidant properties of fentanyl and droperidol were also tested. Lipid peroxidation was evidenced by the endogenously generated conjugated dienes and fluorescent products of lipid peroxidation and the decrease in lung vitamin E content. It was found that fentanyl and droperidol, used separately or in combination, did not induce lipid peroxidation in the rat lung, while the exposure of rats for 120 min to a nitrous oxide/oxygen mixture (2:1 v/v) led to well-expressed peroxidation. The (N2O + O2)-pro-oxidant action was significantly inhibited in rats previously injected with fentanyl and/or droperidol. The results show that the application of fentanyl, droperidol and (N2O + O2), as in neuroleptanalgesia, ensures minimal lipid peroxidation in the lung. In addition, we found that fentanyl and droperidol were able to inhibit the Fe(2+)-catalysed lipid peroxidation in lung homogenate. We speculate that the inhibitory effect of fentanyl and/or droperidol on the (N2O + O2)-induced lipid peroxidation in the rat lung may be caused directly by their antioxidant properties. However, another explanation seems to be possible. The free radicals that are produced during the metabolism of fentanyl and droperidol may react with the radicals generated during the one-electron reduction of nitrous oxide. Such reactions will obviously reduce the free radical concentration in the organism and, hence, the likelihood of initiating lipid peroxidation.
R Bakalova - One of the best experts on this subject based on the ideXlab platform.
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lipid peroxidation in rat lung induced by neuroleptanalgesia and its components
European Journal of Anaesthesiology, 1998Co-Authors: S Chinev, R Bakalova, Sabina Kovacheva, S RibarovAbstract:: The aim of the present work was to determine the likelihood of lipid peroxidation in the lungs of rats subjected to neuroleptanalgesia and its components. In particular, the effect of fentanyl, droperidol, a nitrous oxide/oxygen mixture when used separately or in combination, on the lung level of lipid peroxidation was investigated. The in vitro antioxidant properties of fentanyl and droperidol were also tested. Lipid peroxidation was evidenced by the endogenously generated conjugated dienes and fluorescent products of lipid peroxidation and the decrease in lung vitamin E content. It was found that fentanyl and droperidol, used separately or in combination, did not induce lipid peroxidation in the rat lung, while the exposure of rats for 120 min to a nitrous oxide/oxygen mixture (2:1 v/v) led to well-expressed peroxidation. The (N2O + O2)-pro-oxidant action was significantly inhibited in rats previously injected with fentanyl and/or droperidol. The results show that the application of fentanyl, droperidol and (N2O + O2), as in neuroleptanalgesia, ensures minimal lipid peroxidation in the lung. In addition, we found that fentanyl and droperidol were able to inhibit the Fe(2+)-catalysed lipid peroxidation in lung homogenate. We speculate that the inhibitory effect of fentanyl and/or droperidol on the (N2O + O2)-induced lipid peroxidation in the rat lung may be caused directly by their antioxidant properties. However, another explanation seems to be possible. The free radicals that are produced during the metabolism of fentanyl and droperidol may react with the radicals generated during the one-electron reduction of nitrous oxide. Such reactions will obviously reduce the free radical concentration in the organism and, hence, the likelihood of initiating lipid peroxidation.