Intracranial pressure monitoring by means of a passive radiosonde

The system described is based on the employment of a radiosonde energised from the outside in such a way that it will not be subject to the limitations arising from the use of batteries. The main sources of error, consisting in the thermal drift of the electronic components and particularly of the pressure transducer, have been eliminated by transmitting to the outside the information regarding temperature. Thus the data concerning the pressure can be corrected after reception by a simple manual calculation or by automatic computing.