Der Anaesthesist
-
Review Randomized Controlled Trial Comparative Study Clinical Trial
[Continuous peridural analgesia vs patient - controlled intravenous analgesia for pain therapy after thoracotomy].
Continuous epidural analgesia (EA) and patient-controlled intravenous analgesia (PCA) are widely used for postoperative pain control. Studies indicate that both analgesic regimens provide good analgesia after major surgery. However, because of the following reasons it is still unclear whether one of the two modes of application is superior. First, there are conflicting data regarding the differences in pain relief and drug use between epidural and intravenous administration of opioids. Second, in many studies epidural analgesia is performed by a combination of local anaesthetics and opioids. Third, reduced morbidity was observed only in some of the studies, in which epidural analgesia provided better pain relief than systemic opioid supply. Despite these conflicting results, EA with local anaesthetics and fentanyl as well as PCA with piritramid, a highly potent mu-agonist, are routinely used in Germany. The purpose of this study was to compare these two treatments for analgesic efficacy, pulmonary function, incidence of side effects and complications in patients undergoing thoracotomy. ⋯ In this study EA with local anaesthetics and fentanyl provided superior postoperative pain control and a lower incidence of sedation and nausea compared to intravenous PCA with piritramid, but there was no superiority as to pulmonary complications and duration of hospital stay.
-
Clinical Trial
[Preanalytical errors on the determination of arterial O(2)-partial pressure and their impact on the AaDO(2)].
The paO(2) and AaDO(2) are routinely measured for evaluating pulmonary gas exchange. The normal value of the AaDO(2) amounts 10 mmHg when breathing atmospheric air and is said to increase with rising FIO(2). This increase is discussed controversially. One possible reason for incongruities in AaDO(2) measurement may be the impact of so called preanalytical errors during paO(2) measurement, which are often neglected. Therefore, the aim of this study was to evaluate the relevance of preanalytical errors on the AaDO(2) under hyperoxic conditions. ⋯ The present results show that the assumption of an increasing AaDO(2) with rising FIO(2) is questionable. It could be proved that neglecting preanalytical paO(2) errors leads to a significant overestimation of the AaDO(2). The consequence would be a misinterpretation of the patient's condition in relation to a reduced pulmonary gas exchange, which should in fact be attributed solely to the preanalytical errors.