Which of the following statements concerning the volume guarantee mode on the Dräger Baby-log 8000 ventilator is true?

a. The breaths are volume-limited in this mode.
b. This mode does not operate with as-sist/control.
c. The Dräger Babylog 8000 and 8000+ both have this mode.
d. Positional endotracheal tube leaks may be hazardous with this mode.

ANS: D
When the volume guarantee mode is activated, the ventilator continuously measures and com-pares inspired and expired tidal volume. Each following breath uses the comparisons from the previous breath to make adjustments to the peak inspiratory pressure so that a volume as close as possible to the preset value can be delivered. If there is a positional leak and it is active, the ex-pired tidal volume will be lower than the inspired tidal volume, and the ventilator will increase the pressure to attempt to match the two monitored volumes. This increase in pressure continues if the leak continues. However, if the patient's position changes and the leak is not occurring, the breath delivered will be significantly larger than intended. The limit to the amount of volume is 130% of the targeted volume. At this point, the exhalation valve will open, and no additional ventilator-driven gas will be delivered to the patient. Close monitoring of patient-ventilator in-teraction is needed during use of this mode.