14 Safety Information
Vivo 65 users manual
Doc. 006088 En-US U-1b
• Patient circuits used with the Vivo 65 shall have the following char-
acteristics:
– Length: Max 6 feet (2 meters).
– Connector: 22 mm.
– Resistance: Max 2 mbar at 40 l/min.
If an active exhalation valve is used:
– Inner diameter of the exhalation valve control pressure tube: 3 mm.
– The exhalation valve must be of the type that is open (letting the
exhaled patient air out) when unpressurized by the control pressure.
By conducting a pre-use test (see “Performing the Pre-use Test” on
page 40), the compatibility of the complete patient circuit configura-
tion with the Vivo 65 can be verified. If a pre-use test is successfully
performed the circuit configuration meets the required characteris-
tics.
• The leakage from the mask or leakage port should be at least 12 l/
min at 4 cmH
2
O, to prevent rebreathing of exhaled air. The recom-
mended leakage is 20 to 50 l/min at 10 cmH
2
O pressure.
• Periodically check for moisture in the patient circuit. When present,
remove the moisture. Before attempting to dry the circuit, disconnect
it from the Vivo 65 to ensure no water flows back into the Vivo 65.
• When using the Vivo 65 invasively, the low volume alarm and the low
breath rate alarm must be carefully set, to ensure safe use.
• The use of equipment such as endotracheal tubes, oral/nasal tubes,
adaptors, etc. with small inner diameters or high resistance filters
(such as humidifiers) increases the resistance in the patient circuit
which may interfere with the operation of the patient disconnect
function. It may also interfere with the device trigger function. The
impact can be reduced by conducting a pre-use test properly. (See
“Performing the Pre-use Test” on page 40.)
• In case of invasive application, the use of an appropriate external
heated humidifier or HME (Heat and Moisture Exchanger, artificial
nose)/HCH (Hygroscopic Condenser Humidifier) is recommended.