Interactive ventilation: first experience with patient controlled weaning by using a Siemens-SV 300 Automode® ventilator
© Current Science Ltd 1998
Published: 1 March 1998
The new Siemens SV-300 A ventilator switches automatically between control and support mode of ventilation. At the first sign of respiratory effort, the ventilator allows the patient to breathe spontaneously with a preset pressure or volume support. In case of apnea, the ventilator automatically changes to a preset volume or pressure control mode. In our study the combination of pressure control and pressure support mode was used. 20 patients (pts) who underwent brain tumor surgery were randomized either to the Automode®-Group (n = 10, age 24–76 years, mean 49.7) or to the conventional weaning procedure with manually regulated SIMV-mode (Manual Mode, n = 10, age 22–70, mean 47.9) immediately after entering the ICU. Time from entering the study to extubation (weaning time) was measured. PCO2-Levels during the weaning period were measured for each patient in fixed time intervals. The number of manipulations on the respirator during the whole weaning period was counted for each patient.
Aim of the study
Identification of malfunctions, cases of apnea and comparison of average weaning time, pCO2 levels and number of manipulations necessary during the weaning period.