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(1) When two tolerances are indicated, consider the one with the highest value. The accuracy of
volume and pressure is preserved for respiratory circuits with resistance up to 1.9 cmH2O and
compliance up to 5 mL / cmH
2
O.
(2) Only in VG mode.
(3) For airway resistance greater than 150 cmH
2
O / L / s, the expired volume will have its tolerance
outside the declared. In this condition, the measured inspiratory volume remains unchanged.
(4) Volumes, flows and leakage specifications associated with the ventilator respiratory system are
expressed in BTPS.
•
Ventilation with cyclic pressure up to 100 cmH2O can add tolerance error of up to 2%.
•
The accuracy of the parameters can be affected under the following conditions:
o
Reuse of single-use accessories;
o
Incorrect sensor uses for patient type;
o
Secretion in the circuit and flow sensor;
o
Leakage in the circuit;
o
Oxygen cell and flow sensor not calibrated;
o
Condensation in the circuit, flow sensor and gas inlet;
o
Use of nebulizer with the capnography sensor;
o
Proximal flow sensor with tubes facing down.
•
To maintain the accuracy, keep the flow sensor, breathing circuit, and gas inlet dry,
clean, and non-condensing.
•
In practice, the units of measure of pressure are equivalent, being able to adopt that 1 mbar
= 1 hPa ≈ 1 cmH2O.
•
Oxygen monitoring is obtained accurately in up to 20 seconds after initialization.
10.17 Safety System Specifications
•
Anti-asphyxia valve for protection against gas supply failure.
•
Safety relief valve of 100 cmH2O, according to basic ventilator norm in order to avoid
overpressure in the respiratory circuit.