Vpap Features; Climate Control - ResMed S9 VPAP Series Clinical Manual

VPAP features

Climate Control

VPAP devices, when used in conjunction with the H5i and ClimateLine or ClimateLine
tubing, offer a feature called Climate Control.
Climate Control enables the automatic delivery of a constant value of absolute humidity to the patient's
upper airway while protecting against rainout and allowing patients to select the air temperature that
offers the most comfort for them.
Rainout protection
Rainout refers to the water or condensation that collects in the patient's tubing or mask. Rainout is a
common side effect of using a humidifier due to the humidified air cooling as it travels down the tubing
and into the mask. Rainout occurs when relative humidity, which is a measure of the air's capacity to hold
water vapour, exceeds 100%.
Climate Control protects the patient from rainout by maintaining a target relative humidity of 80% as well
as maintaining the temperature of the air delivered to the patient without compromising the amount of
absolute humidity delivered.
Automatic constant humidity delivery
For each temperature setting, the Climate Control system delivers a constant amount of water vapour, or
absolute humidity, to the patient's upper airway. The following table shows the target absolute humidity
value that will be delivered to the mask for a selection of temperature settings.
Temperature delivered to the mask
60ºF (16ºC)
68ºF (20ºC)
75ºF (24ºC)
80ºF (27ºC)
86ºF (30ºC)
Automatic constant temperature delivery
The temperature sensor located at the mask end of the ClimateLine or ClimateLine
tube enables the system to automatically control the temperature of the air delivered to the patient.
This ensures the temperature of the air delivered to the patient does not fall below the set minimum
temperature, therefore maximizing breathing comfort for the patient.
Automatic adjustment
The H5i and ClimateLine or ClimateLine
to deliver constant humidity and temperature outputs. The system adjusts automatically to changes in:
• ambient room temperature and humidity values
• flow due to pressure changes
• flow due to mask or mouth leak.
8
Target absolute humidity at the mask,
Body Temperature Pressure Saturated (BTPS)
heated tubing are controlled by the Climate Control algorithm
MAX
heated air
MAX
10 mg/L
12 mg/L
16 mg/L
19 mg/L
22 mg/L
heated air
MAX