title: [Comparative trial of a new epidural transducer for intracranial pressure monitoring (author's translation)].
abstract: The measurement of intracranial pressure using a new epidural pressure transducer has been compared with the classical method of measuring intraventricular pressure. Comparative measures in vitro have been carried out with acid of an enclosure in which the hydrostatic pressure can be varied. Four positions of the epidural transducer with the respect to the dura mater have been studied; of these, only one, coplanarity between the epidural transducer and the dura, gives an excellent correlation between values of epidural pressure and hydrostatic pressure. Twenty-nine prolonged recordings have been carried out in vivo. Fifteen of these have given comparable recordings for E.D.P. and I.V.P. In the other fourteen cases the recordings were considered non comparable, either because of a significant difference between the average values of E.D.P. and P.I.V. or because the two curves were not parallel. It is considered that these differences are due to the problems of correctly positioning the epidural pressure transducer and hence an inability to achieve the condition of coplanarity. These problems should be resolved by a modification of the method of positioning the epidural pressure transducer. The use of this type of materiel is of interest for the monitoring of the I.C.P. of neurosurgical patients, as the epidural pressure follows the variations of I.C.P. and indicates pressures waves when they exist.
mesh_terms: D004824:Epidural Space; D006801:Humans; D066298:In Vitro Techniques; D007427:Intracranial Pressure; D008991:Monitoring, Physiologic / Q000295:instrumentation* / Q000379:methods; D009462:Neurology / Q000295:instrumentation; D014159:Transducers
vernacular_title: Essai comparatif d'un nouveau capteur épidural pour la mesure et la surveillance de la pression intracrânienne.