A
F
C
OPERATION
MUTE
The mute button silences the humidifier's audible alarm for at least two minutes. The muted time depends on the alarm condition and the severity of its cause.
SET-UP INDICATORS
Chamber & Airway Probes Lights if either the chamber probe or the airway probe is not inserted into the breathing circuit correctly.
Heater Wire
Lights if the heater wire adaptor or breathing circuit has not been connected, or is damaged.
Temperature Probe
Lights if the temperature probe is not correctly plugged into the MR850, or the probe is faulty.
Water Out
Lights when there is insufficient water in the chamber. Check water supply. Maximum time to alarm of 20 minutes.
See Manual
The humidifier and all accessories should be immediately replaced and sent for servicing.
D
H
G
• Mounting Bracket (to suit ventilator)
• Temperature Probe
(e.g: 900MR869)
• Heater Wire Adaptor (e.g: 900MR800)
THE FOLLOWING
ACCESSORIES ARE
REQUIRED:
• Humidification Chamber (e.g: MR290)
• Breathing Circuit
(e.g: RT110)
SET UP
1. Slide humidification chamber (A) onto humidifier base and connect breathing circuit (B) (refer to humidification chamber and breathing circuit operating instructions for further details).
2. Connect the temperature probe plug (C) (REF 900MR86X) to the blue socket on the humidifier base until an audible click is heard.
3. Push the chamber probe (D) and airway probe (E) into the breathing circuit. Make sure the chamber probe is correctly located in its key-way and that both probes are pushed home. The probe lead can be restrained using breathing circuit clips.
4. Connect the heater wire adaptor plug (F) (REF 900MR8XX) to the yellow socket on the humidifier base until an audible click is heard.
5. Connect the other end(s) of the heater wire adaptor to the breathing circuit socket(s) (G) and (H).
6. The humidification system is now set up and ready for use. After power on, the humidifier will default to invasive mode. ATTENTION: Refer to operating instructions which accompany each accessory.

E

B

Choice will depend upon application.

Please contact your local Fisher & Paykel Healthcare representative for recommendations.

TEMPERATURE DISPLAY

Displays the saturated gas temperature (the lower of the airway and chamber temperatures in °C) delivered to the patient. This display will normally show the chamber temperature (around 37 ± 0.5 °C for invasive mode, and 31 ± 0.5 °C for noninvasive mode).

By pushing and holding the mute button for one second, the chamber outlet temperature then the airway temperature is displayed. The display will then revert to normal operation.

LOW TEMPERATURE ALARM

An audible alarm and flashing temperature display showing 35.5 °C or lower (in invasive mode only). Caused by cold/drafty conditions or very high or low gas flows.

If the circumstances causing the low humidity alarm cannot be changed then the audible alarm acts as a reminder that the patient is receiving inadequate humidity and may require further intervention to maintain airway clearance.

HIGH TEMPERATURE ALARM

A flashing temperature display showing 41 °C or higher. The humidifier will discontinue heating of the chamber and circuit until the temperature decreases to within normal limits.

MODE BUTTON

This button switches between invasive and noninvasive mode.

Invasive Mode

This mode is for patients with bypassed airways. The humidifier delivers gas as close to body temperature saturated (37 °C, 44 mg/L) as possible.

Under cold or drafty conditions the chamber temperature may drop as low as

35.5°C in order to maintain a dry breathing circuit.

WARNING: Ensure that invasive mode is set for patients that have bypassed airways

Noninvasive Mode

This mode is for patients receiving face mask or headbox therapy, and delivers a comfortable level of humidity.

ON/OFF BUTTON

The humidifier will power ON if this button is held down briefly, but must be held down for one second to turn the humidifier off. The humidifier will always default to invasive mode when it is turned on.

ROUTINE MAINTENANCE

Refer maintenance to qualified service personnel. A full technical description including routine maintenance and service data is contained in the Technical Manual which is available from your supplier or Fisher & Paykel Healthcare (REF 185041340)