Annales françaises d'anesthèsie et de rèanimation
-
Ann Fr Anesth Reanim · Jan 1998
Comparative Study[Principles of tests of hypotheses in statistics: alpha, beta and P].
Modern clinical research requires control of statistical methods. We reviewed 120 original manuscripts which were submitted to the Annales françaises d'anesthésie et de reanimation and analyzed their statistical methodology. Most of them contained errors (inappropriate numerical expression of the data, uncontrolled alpha risk, lack of power, use of inadequate statistical tests) and only 9 (7%) were considered as adequate. ⋯ The following items should be checked to choose the appropriate test: assess the kind of variable, verify the requirements for application of the test (type of the variable distribution, sample size, particular conditions such as equality of variance, dependence or independence of the variables), determine if data come from paired samples or if multiple comparisons are performed. Statistical analysis has become more easy with computers, however a precise knowledge of statistics remains essential. Advice from a statistician is often useful especially when obtained a priori and not a posteriori.
-
To evaluate the incidence and the causes of early intra- and postoperative deaths in a multidisciplinary hospital. ⋯ In this survey, mortality due to anaesthesia was higher than the rates reported in other studies. Human error remained the main cause.
-
Ann Fr Anesth Reanim · Jan 1998
Clinical Trial[Pressure exerted on tracheal cuffs in intubation in the presence of nitrous oxide].
To compare the time course of endotracheal tube cuff pressures in presence of nitrous oxide (N2O), obtained in a tracheal model with those measured during clinical anaesthesia. ⋯ The results obtained in vitro were correlated with those measured in the patients. Therefore the tracheal model is a helpful guide for the choice of endotracheal tubes.
-
Ann Fr Anesth Reanim · Jan 1998
Case Reports-Coagulopathy suggestive of a primary fibrinolysis after head injuries with brain death-.
Coagulopathies associated with severe head trauma are usually of disseminated intravascular coagulation type with secondary fibrinolysis. We report a case whose semeiology was in part suggestive of a primary fibrinolysis.