33373-001 Version A
10.3 Sterilization
The following accessory parts may be sterilized:
The exhalation valve body
The exhalation flow sensor
The exhalation diaphragm
10.3.1 Method of Sterilization
The preferred method of sterilization is
Steam Sterilization (autoclave), minimum 132° C (270° F) maximum temperature 134 ºC
(273 ºF). It is recommended that the accessories listed above be replaced after 30 cleaning and
sterilization cycles.
1. After cleaning the surfaces, make sure all excess cleaning solution is completely removed to
prevent residue buildup.
2. Sterilize the exhalation valve body, flow sensor and diaphragm using steam autoclaving within
the guidelines stated above.
3. Using a low flow gas source (less than 10 L/min) ensure the differential pressure tubes are free
of moisture and debris.
4. To avoid possible damage to elastomeric components, the peak temperature for Vyaire
accessories should not exceed 275 °F (135 °C) for steam autoclave.
5. Ultrasonic cleaning is not recommended. Liquid sterilizing agents containing more than 2%
glutaraldehyde are also not recommended. If such agents must be used, be sure to thoroughly
rinse and dry the assembly to prevent residue buildup. Residue buildup in the differential
pressure ports can cause inaccurate pressure and volume readings.
6. Prior to replacing the exhalation valve diaphragm, inspect it for excessive wear. If signs of
damage are found, obtain a new diaphragm.
7. Insert the diaphragm. Hold it by the center and set it into the exhalation valve-housing
receptacle. Gently tap around the perimeter until the diaphragm is firmly seated.
8. Line up the tabs of the exhalation valve body with the alignment slots on the exhalation valve
housing. Gently push the exhalation valve body into place and rotate it clockwise until the
release latch pops out. The exhalation valve body ‘clicks’ into place.
9. Gently pull on the exhalation valve body to make sure it is securely attached to the ventilator.
10.4 Other Accessories
For all other accessories purchased for use with your VELA Ventilator, but not supplied by Vyaire,
follow the manufacturer’s recommendations for cleaning or sterilization.
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