SPECIFICATIONS

Alarm Parameters

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High Humidity Alarm: An immediate, audible alarm at a displayed temperature of 41 °C or if the airway temperature exceeds 43 °C

Low Humidity Alarm: An audible alarm between 10 minutes @ 29.5 °C, and 60 minutes @ 34.5 °C (Invasive Mode only)

Sound Pressure Level: Alarms exceed 50 dBA @ 1 m

Performance

Recommended ambient temperature range: 18 - 26 °C

CAUTION: If operating in ambient temperatures outside the recommended range, consult your local Fisher & Paykel Healthcare representative.

Recommended Flow Range: Invasive Mode: up to 60 L/min, Noninvasive Mode: up to 120 L/min

WARNING

Ensure that invasive mode is set for patients that have bypassed airways.

The use of breathing circuits, chambers or other accessories which are not approved by Fisher & Paykel Healthcare may impair performance or compromise safety.

Ensure that both temperature probe sensors are correctly and securely fitted. Failure to do so may result in temperatures in excess of 41 °C being delivered to the patient.

Ensure maintenance of grounding integrity by connection to a 'hospital grade' receptacle. Always disconnect supply before servicing.

When mounting a humidifier adjacent to a patient ensure that the humidifier is always positioned lower than the patient.

The operation of high frequency surgical apparatus, shortwave or microwave equipment in the vicinity of the humidifier may adversely affect its function. If this occurs, the humidifier should be removed from the vicinity of such devices.

Do not touch the glass tip of the chamber temperature probe during use. Keep black connectors dry at all times.

Visually inspect accessories for damage before use.

CLEANING MR850 Heaterbase Using a damp cloth, clean the humidifier with either of the following: Isopropyl Alcohol, normal dishwashing detergent. Temperature Probe Always clean before use. Probes can be cleaned with one of the following solutions: SporicidinTM, CidexTM OPA, SporoxTM OR sterilize the probe using Ethylene Oxide sterilization at 55 °C (131 °F), 80 kPa, (allow at least 15 hours for residual ETO to disperse before use). Wipe the airway temperature probes clear of any cleaning residues before use. Store probes in clean conditions. DO NOT autoclave probes.

CAUTION: DO NOT immerse the heaterbase or temperature probe electrical connections in any liquid.

NOTE: Follow the cleaning agent manufacturers’ instructions carefully. It is the user’s responsibility to qualify any deviations from these procedures, both for disinfecting efficacy and physical effect on the probe and the heaterbase. See the MR850 technical manual for more detailed instructions on cleaning.

MR850 RESPIRATORY HUMIDIFIER

Patents Pending in Principal Countries

of the World

The MR850 respiratory humidifier is used to warm and humidify gases delivered to patients requiring mechanical ventilation, positive pressure breathing assistance, or other medical gases.

INSTRUCTION SHEET

DO NOT DISCARD

REF 185042343

Rev G 2004-02

INTERNATIONAL P O Box 14 348, Panmure, Auckland 1134, New Zealand Tel:+64 9 574 0100 Fax:+64 9 574 0158 Email: info@fphcare.com Web Site: www.fphcare.com USA Tel: 1800 446 3908 or +1 949 470 3900 Fax:+1 949 470 3933

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.

G

H

E

B

D

THE FOLLOWING ACCESSORIES ARE REQUIRED:

•Humidification Chamber (e.g: MR290)

•Breathing Circuit (e.g: RT110)

•Temperature Probe (e.g: 900MR869)

•Heater Wire Adaptor (e.g: 900MR800)

•Mounting Bracket (to suit ventilator)

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.

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)

NON-HEATED BREATHING CIRCUITS 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. 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.

RECOMMENDED SETUP FOR ADULT PATIENTS

Non-heated breathing circuit with MR290 Chamber

Fisher And Paykel Service Manual

900MR869 Temperature Probe, Mounting bracket to suit ventilator

For all other applications refer to Product Guide or contact your local Fisher & Paykel Healthcare representative.

SPECIFICATIONS (additional)

Temperature Control Settings (non heated circuits)

Invasive Mode: Airway 37 ºC

Noninvasive Mode: Airway 31 ºC

Alarm Parameters (non heated circuits)

High Temperature Alarm: Immediate, audible alarm at a displayed temperature > 41 ºC

Low Temperature Alarm: Audible alarm at a displayed temperature < 29 ºC (Invasive), < 26 ºC (Noninvasive)

Performance (non heated circuits)

Recommended Flow Range: Invasive Mode: 6 to 60 L/min Non-Invasive Mode: 6 to 120 L/min

(c)

NOTE

To set the humidifier to non-heater wire mode, refer to the MR850 technical manual. (Rev. H or later).

If a heated breathing circuit is used while in non-heater wire mode the humidifier automatically changes to heater wire mode. To use non-heater wire mode again will require it to be manually set.

The airway probe out test does not work with non-heated breathing circuits. A low humidity alarm will instead be given.

When there is no gas flow the humidifier will give a low humidity alarm.

If the chamber runs dry either a water out alarm or a low humidity alarm will occur.

MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041340 (185041713 internal)

23

5.3 Cleaning

Instructions

5.3.1 MR850

Humidifiers

It is recommended that only the following cleaners be used on the MR850 as at the time of
revision of this technical manual. The disinfectants in the list below have been tested to ensure
that no damage will result to the outer plastic or metal components of the humidifier.

1. Disconnect the humidifier from any electrical outlet.
2. Clean the humidifier with one of the following recommended disinfectants using a damp

cloth:

Isopropyl

Alcohol

Normal dishwashing detergent

NOTE:

Follow the manufacturer’s instructions carefully.

Use the correct dilution of the disinfectant.

DO

NOT immerse the humidifier in any liquid.

3. Wipe the humidifier clear of any cleaning residues before use.

5.3.2

Temperature Flow Probe

The cleaning methods listed below meet the FDA regulations for these types of devices, and do
not affect the integrity or performance of the probe. It is the user’s responsibility to qualify any
deviations from these procedures, both for disinfecting efficacy and physical effect on the probe.
For advice on other cleaning methods not mentioned here, contact your local Fisher and Paykel
Healthcare distributor.

NOTE: Refer also to the disinfection instructions on the instruction sheet for the airway
temperature probe, Ref 185042434.
1. Physically clean the probes, removing all visible contaminants.
2. Disinfect the probes with one of the following solutions:
Sporicidin

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; Sporox; Cidex; Cidex  OPA

OR Sterilise the probe using Ethylene Oxide sterilisation at 55 °C (131 °F), 80 kPa,

allow at least 15 hours for residual ETO to disperse before use.

NOTE: Follow the manufacturer’s instructions carefully. Use the correct dilution of the

disinfectant.

CAUTION: DO

NOT immerse the black electrical connector plug in disinfectant.

DO

NOT autoclave probes.

DO

NOT use dishwater detergents or solvents.

3. Wipe the airway temperature probes clear of any cleaning residues before use.
4. Store in clean conditions.

Cidex

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 is a registered trademark of Johnson & Johnson Medical Pty. Ltd. North Ryde, NSW, Australia.

Sporicidin

 is a registered trademark of Sporicidin International Ltd, Rockville, MD 20852, USA.

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Sporox

 is a registered trademark of Reckitt & Colman Inc. 1655 Valley Rd. Wayne NJ USA

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