[Telemetric measurement of intracranial pressure with the help of an electromagnetic detector implanted within the epidural space. Tolerance and reliability verified in 16 cases (author's transl)]. / Mesure télémétrique de la pression intracranienne par un capteur électromagnétique implanté dans l'espace épidural. Tolérance et fiabilité vérifiées sur une série de 16 cas.

After a detailed description of the technique the authors report the clinical results obtained in a series of 16 patients upon whom the new detector has been implanted and comparative measurements of the intracranial pressure by lumbar puncture were effected. The length of implantation of the detector which was of the order of several months in a majority of cases permitted to verify the stability and tolerance of the device as well as its long-term reliability since the length of functionning was of more than 6 months in half of the patients. Quantitatively, the instantaneous value of the intracranial pressure could be evaluated with the standard deviation of 17 mm of water in comparison to the values obtained by lumbar puncture. While being acceptable in clinical practice, this margin of error can be reduced in the future. The authors intend to utilize this detector at first for the monitoring of intracranial pressure before advocating its use in prolonged surveillance of intracranial pressure.

[Measurement of venous pressure by the pneumatic captor and transmitter. Experimental study]. / Mesure de la pression veineuse par capteur et transmetteur pneumatiques. Etude expérimentale.

The results are reported of experimental testing of a non-invasive method for pressure measurement in esophageal varices. The correlation between measurements of venous pressure by pneumatic captor and electronic manometer and those by water column is excellent for pressure ranging between 13 and 44.5 cm H2O.