Der Anaesthesist
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Randomized Controlled Trial Comparative Study Clinical Trial
[General anesthesia vs. retrobulbar anesthesia in cataract surgery. A randomized comparison of patients at risk].
Several studies comparing retrobulbar block (RB) and general anaesthesia (GA) for cataract surgery in the elderly have been published. Most of them were retrospective. Our prospective study was designed in order to determine the benefits or disadvantages using RB or GA. ⋯ Intravenous acetazolamide did not influence ABG in a significant manner. With regard to the preference of each patient, we recommend both RB and GA for cataract surgery in high-risk patients on the assumption of sufficient preoperative treatment of co-existing diseases. In conclusion, cardiovascular and ABG stability were maintained during both anaesthetic techniques.
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The relationship between oxygen consumption (VO2) and oxygen delivery (DO2) is of interest in critically ill patients. Various studies of these parameters have resulted in different concepts for optimizing DO2 and VO2. During liver transplantation without anhepatic veno-venous bypass, caval cross-clamping initiates a series of haemodynamic and metabolic alterations including the rapid change from hyperdynamic to hypodynamic conditions. ⋯ In these patients, there was a significantly greater increase in mixed-venous saturation accompanied by a further decrease in body temperature. As shown in Figures 1 and 2, no significant relationship was found between O2 transport, VO2, and blood lactate. DISC
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Phosphodiesterase III inhibitors have been established in recent years in the therapy of congestive heart failure. Many disadvantages, such as extensive vasodilation and the lack of proven positive inotropic properties combined with thrombepenia and elevation of transaminases, have complicated the handling of the drug in clinical practice. Enoximone, an imidazole derivative, has been demonstrated to be more cardioselective and vasodilation has been found to be less pronounced than with amrinone. ⋯ At sternotomy, MAP remained unchanged. Cardiac output (CO) increased by 60% after administration of R80122 (P less than 0.01) and did not change during sternotomy. As a consequence of the changes in HR and CO, stroke volume (SV) increased by 22% after administration of R80122 (P less than 0.025) and decreased to control values during sternotomy.
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Comparative Study
[Anesthesiologic efficacy of propanidid as a liposome dispersion. An experimental study with rats].
Propanidid, an ultra-short-acting i.v. anaesthetic agent, was widely used in the 1960s. Reports of anaphylactoid reactions in patients associated with release of histamine following administration of the drug, however, led to withdrawal of this useful anaesthetic. Since the adverse side effects of the former solution could be attributed to the solvent cremophor, attempts have recently been made to produce a propanidid solution without addition of the solvent. We report on comparative investigations employing a new liposomal solution (B. Braun, Melsungen, FRG) and the conventional cremophor preparation with regard to anaesthetic properties, haemodynamic side effects, and electroencephalographic effects (EEG). ⋯ The present findings demonstrate largely identical anaesthetic potencies of a new liposomal solution as compared to the conventional cremophor preparation of propanidid. The liposomal preparation, however, was superior as far as tolerance and incidence of clonic seizures was concerned. The present findings should prompt further studies on the suitability of liposomal propanidid as a short-acting anaesthetic agent in patients.