RCH @ Home Manual: Fisher & Paykel MR700/720 /730/750
Table of Contents
1. Fisher & Paykel Humidifier 2
2. Setting up the Humidifier 2
3. Controls and Alarms on the Front 3
3.1 Airway Temperature Control 3
3.2 Airway Temperature Display 3
3.3 Chamber Temperature (upper-right) 4
3.4 Standby Button 4
3.5 Heater Wire Button 4
3.6 Chamber Control Button 5
3.7 Mute Button (upper-left) 5
3.8 Temperature Probe Alarm 5
3.9 Heater Wire Alarm 5
3.10 Chamber Temperature High Alarm 5
3.11 Airway Temperature High Alarm 6
3.12 Chamber Temperature Low Alarm 6
3.13 Airway Temperature Low Alarm 6
4. Controls on Right-side 7
4.1 Heater Wire Power Socket (1) 7
4.2 Temperature Probe Socket (2) 7
4.3 Mains Switch (3) 7
5. Controls on Left-side of Humidifier 7
5.1 Serial Data Port (1) 7
5.2 Power Cord (2) 7
6. Cleaning 7
7. Trouble Shooting 8
Version / 4Date revised / October 2014
Next revision date / October 2015
This section is not intended to replace the Fisher & Paykel MR700 Humidifier manual. Home and Community Care acknowledges the assistance of Fisher & Paykel Healthcare in writing this section.
1. Fisher & Paykel Humidifier
This humidifier consists of a heater base and water-filled humidifying chamber. As the water in the humidifier chamber becomes heated it gives off water vapour (moisture). As the air passes from the ventilator circuit through this chamber, this moisture is picked up.
2. Setting up the Humidifier
Procedure
1. Plug the humidifier power cable into an AC supply
2. Slide the humidification chamber onto the humidifier base at the top of the machine—take care not to touch the heater plate, as its surface may be very hot
3. Fill the humidifier chamber with cooled boiled water, up to maximum water level line—take care not to over fill
4. Connect circuit from the ventilator to the inlet port of humidifier chamber
5. Connect the inspiratory circuit containing heater wire to the outlet port of the humidifier chamber
6. Connect expiratory circuit to ventilator expiratory valve
7. Connect dual airway temperature probes into the socket on the side of the heater base, and place the other end of the sensor probe, (the T-shaped end) firmly into the inspiratory circuit tube, ensuring tip of the sensor is in the middle of the airway flow. The temperature delivered to the patient may exceed 41C if the probe is not inserted correctly at the end of the inspiratory circuit
8. Connect heater wire adaptor into the humidifier base and the plugs into each circuit to be heated
9. Set the temperature control
10. Set the chamber control to -3
11. Turn humidifier on, using ‘ON/OFF’ switch—the display will show ‘888’, all the indicator lights will be lit for one-second, and an alarm will sound briefly
· If the display shows anything other than a temperature after the start-up sequence is completed the unit should be removed from the patient’s circuit and send to the Royal Children’s Hospital for repair
· When a heated wire circuit is being used, check that the green indicator light next to the heater wire button is illuminated. If not, press the button firmly. Ensure that the green light stays on when the button is released
· Set the desired temperature by rotating the temperature control knob. As the setting is changed the display will flash. The new setting will continue to be displayed in the flashing mode for five-seconds after the last adjustment
· With gas flowing through the patient circuit, the digital display will show the rise in gas temperature as the humidifier warms up
From time to time check the airway temperature displayed is close to the setting needed for the child.
If the air flow through the humidifier is stopped the humidifier should be turned off If you need to change the set temperature this should be done slowly as adjusting these by more that the limits may sound the high or low temperature alarms. This will happen until the temperature control system adjusts to the new setting.
3. Controls and Alarms on the Front
3.1 Airway Temperature Control
Sets the air temperature to be delivered
3.2 Airway Temperature Display
Shows the actual temperature of the air being delivered directly to the patient
3.3 Chamber Temperature (upper-right)
Holding this button displays the temperature of the air at the humidification chamber outlet. The green indicator light next to the button will be lit up while the button is held.
3.4 Standby Button
Pressing this button for one-second switches the humidifier into standby mode—the amber indicator light will flash.
After 20-minutes the humidifier will automatically return to warm-up and normal operation.
Standby mode can be exited at any time by re-pressing the standby button for one-second—the indicator light will stop flashing and an audible beep will sound.
In the standby mode all low temperature alarms are inhibited, the heater plate is controlled to 40°C maximum and the heater wire to 15-percent maximum power. In this way, the temperature of the air delivered to the patient, when normal flows are resumed are limited, but warmth is maintained to accelerate the warm-up period.
WARNING: gas flow must be resumed before standby mode is exited. Do not enter stand by mode if air flow is to be turned off for an extended period of time, turn the humidifier off completely.
3.5 Heater Wire Button (MR 720/730 models only)
Press this button until the green indicator light illuminates to switch on the power to the heater wire. The heater wire is situated in the circuit tube that leaves the humidifier. It helps to maintain the temperature of the air as it passes through the circuit after leaving the humidifier and reduces the amount of condensation within the circuit.
3.6 Chamber Control Button
This sets the difference between the temperatures delivered to the patient and the humidification chamber outlet, thus controlling the ‘relative humidity’ (controls the amount of condensation within the circuit, minimising ‘rainout’ while maximising humidification)
If this control is set too high there may be an increase in the amount of condensation within the circuit
Usually set at -3 but can be adapted for varying conditions. This means that the temperature of the gas at the humidification chamber outlet will be three-degree lower than the temperature set to be delivered to the patient. As the air travels from the humidification chamber outlet to the patient, it will be heated by three-degree. This has the effect of maintaining the level of absolute humidity generated in the humidification chamber, but decreasing the relative humidity, therefore minimising the possibility of condensation
3.7 Mute Button (upper-left)
This silences all alarms for three-minutes. Unless the cause is understood and assessed to be of no hazard to the patient, the humidifier should be immediately switched off and the patient removed from the circuit
3.8 Temperature Probe Alarm
A red indicator will flash and an alarm will sound if the temperature probe connection is loose, not fitted, or faulty.
3.9 Heater Wire Alarm
A red indicator will flash and an alarm will sound if the heater wire connection is loose or faulty.
3.10 Chamber Temperature High Alarm
An amber indicator will flash and an alarm will sound if the temperature of the air leaving the humidifier chamber has been more than 4°C higher than the set chamber temperature for longer than 20 minutes.
This may alarm on very hot days when the inlet gas temperature is higher than that set to deliver to the patient. Check to see if there is water in the chamber
3.11 Airway Temperature High Alarm
Red indicator will flash and an alarm will sound if the temperature of the air leaving the humidifier has been more than 2°C higher than the set temperature
Often alarms when the circuit disconnects from the patient and the higher flow pushes warm air from the chamber through faster
3.12 Chamber Temperature Low Alarm
Amber indicator will flash and an alarm will sound if the temperature of the air leaving the humidifier has been more than 4°C lower than the set chamber temperature for longer than 20-minutes
3.13 Airway Temperature Low Alarm
Red indicator will flash and an alarm will sound if the gas temperature being delivered to the patient is 2°C lower than the set temperature (MR700/730)
May alarm if humidifier switched on but ventilator is switched off or disconnected—press standby button
Check that airway probe has been inserted in to the circuit, or if there is condensation or debris on the probe.
4. Controls on Right-side
4.1 Heater Wire Power Socket (1)
The heater wire power connection plugs into this socket
· Do not to rotate this connection when connecting and disconnecting
4.2 Temperature Probe Socket (2)
The temperature probe connection plugs into this socket
4.3 Mains Switch (3)
Turns power to the humidifier on and off.
5. Controls on Left-side of Humidifier
5.1 Serial Data Port (1)
Allow the humidifier to be connected to a computer for monitoring
5.2 Power Cord (2)
For connecting the humidifier to AC power source
6. Cleaning
The humidifier can be wiped down with a damp cloth and a mild dishwashing detergent. Dry thoroughly with a soft cloth before reconnecting. Never immerse in water or use strong solvents.
7. Trouble Shooting
Indicator / Problem / Causes / Actions TakenTEMP PROBE
Display shows:
“---“ / Probe disconnect-power to both heaters is discontinued / 1. Temperature probe not connected / Connect temperature probe correctly
2. Fault in the temperature probe cable / Replace temperature probe & notify technicians
HEATER WIRE Display shows actual airway temperature eg:’25.0’ / Heater hose disconnect—power to both heaters is disconnected / 1. Heater hose is not connected / Connect hose heater wire
2. There is a fault in the hose heater wire
3. If using the 730 check that the heater wire button is on / Replace the heater wire circuit & notify technicians
HEATER WIRE Display shows “F-2” / Fuse open circuit—power to both of the heaters is disconnected / The 4 amp hose heater fuse is open circuit / Notify parents. Humidifier needs fuse replaced—notify technicians
CHAMBER TEMP HIGH. Display shows actual airway temperature. Eg: “36.9” / Temperature at humidification chamber outlet is 10oC higher than set; or 4oC or more above the correct temperature for 20-minutes. Power to the hearer plate is discontinued / 1. Change in gas flow / If fault persists, remove the humidifier from the patient & notify technicians
2. No water in chamber / Refill humidifier chamber
3. Heater plate control fault / Notify technicians
CHAMBER TEMP LOW Actual airway temperature is displayed Eg: “34.5” / Temperature at humidification chamber is at least 4oC less that the correct temperature for 20-minutes / 1. Poor thermal contact between base of chamber & heater plate / Check chamber base and heater plate are clean, smooth and flat. Replace if necessary
2. Temperature probe not inserted at chamber outlet / Fit the temperature probe at the chamber outlet correctly
3. Heater element fault / Notify technicians
Indicator / Problem / Causes / Actions Taken
AIRWAY TEMP HIGH Display shows actual airway temperature. Eg: “39.2” / Temperature at patients end is at least 2oC above the set temperature—power to both of the heaters is discontinued immediately / 1. Sudden increase in gas flow / Push the mute button & wait for the temperature to fall. If alarm persists switch humidifier off & remove from the patient
2. Hose heater is too close to the temperature probe / Distance between the heater wire and temperature probe should be more than 25mm
3. Set temperature knob adjusted more than the alarm limit / Push mute button and wait for temperature to fall
AIRWAY TEMP LOW Display shows actual airway temperature eg: "32.4" / Temperature at patient’s end is at least 20C less than set temperature / 1. Gas flow stopped or interrupted / Turn humidifier off, or select standby mode
2. Gas flow rate below recommended minimum / Check that the flow rate not below 15-liters/min
3. Temperature probe not in probe housing / Fit the temperature probe correctly
4. Set temperature adjusted by more than the alarm limit / Push the mute button and wait for the temperature probe to rise
5. Distance between the heater wire and temperature probe too great / Ensure the distance between the heater wire and the probe is less than 100mm
ERROR CODE Display shows eg: “bl” : “Ec” / Fault with mechanical or electrical part / Failure of a mechanical or electrical part / Remove humidifier & notify technicians
SEE MANUAL Continuously on, does not flash, there is no display / There is no power other that this single indicator light. Heater is turned on & there is no alarm / Internal malfunction / Remove humidifier & notify technicians
Ó RCH @ Home, Royal Children's Hospital.
This document is subject to a disclaimer, see http://www.rch.org.au/uploadedFiles/Main/Content/hacc/home_care_manuals/RCH@Home%20Disclaimer.pdf
Page 9 of 9