Dräger Perseus A500, Руководство пользователя

Страница: 11 / 38

Page 11 / 38
2.9 Breathing bag
- The breathing bag of Dräger anesthesia devices acts as a reservoir during mechanical
ventilation. The exhaled breathing gas is captured in the breathing bag. Therefore, the breathing
bag moves during mechanical ventilation. The capacity of the breathing bag should always
be sufficient. A high fresh gas flow increases the robustness of the ventilation. When the fresh
gas flow is too low, the manual breathing bag (reservoir for the patient gas) may collapse in a
leakage situation, which would impair the ventilation. In particular, patients breathing
spontaneously might require very high tidal volumes, which they inhale from the manual
breathing bag. Using a very large breathing bag (e.g. Dräger 3 liter breathing bag) is
recommended to avoid having the breathing bag limit the spontaneous breath of the patient.
2.10 Water Trap - Waterlock 2
- The water trap (Waterlock2) at the gas measurement module of Dräger anesthesia devices
protects the gas measurement against humidity. To ensure system functionality the water
trap has to be emptied or exchanged before it becomes full . Please refer to the IFU for how
to drain the water trap. The required frequency of doing this depends on the humidity of the
sample gas. For usage of the Dräger anesthesia device with high fresh gas flows and a
combined HME/ mechanical filter we expect that the filling level has to be checked every 12
hours. If using the recommended filter on the Y-piece (combined Heat and Moisture Exchanger
(HME) / mechanical breathing system filter (HMEF) or a mechanical breathing system filter) and
the gas sampling line is connected on the device side of the filter, the water trap has to be
exchanged at least every 4 weeks. If no mechanical filter or HMEF is used on the Y-piece or the
gas sampling line is connected on the patient side of the filter, exchange the water trap at least
every 7 days.
2.11 CO
2
absorber
- One significant difference between intensive care ventilators and anesthesia devices is that
anesthesia ventilators are based on a rebreathing system and adjustable fresh gas flows. This
requires the use of a CO
2
absorber to prevent high CO
2
levels in the circuit. It is important to
examine the CO
2
absorber and change it before it is exhausted. An exhausted absorber can be