Parker Matrx Digital MDM User manual

10545100-English Rev B
05/2018
Parker Hannifin Corporation
Porter Instrument
245 Township Line Road
Hatfield, PA 19440
Office 215 723 4000
Fax [phone]
Digital MDM
Operations Manual
This product complies with the Medical Device Directive (93 / 42 / EEC).
A “Declaration of Conformity” in accordance with the directive has been made and is on file.
European Communities should contact the Authorized Representative listed below regarding any Medical
Device Directive (MDD) inquiries.
Contact Name:
Parker Hannifin Ltd Instrumentation Products Division
Mailing Address:
Riverside Road, Pottington Business Park
Barnstaple, EX 31 1NP, England
Phone:
[phone] Fax: [phone]
The Quality System for Porter Instrument is certified to ISO 13485. The scope of our registration is:
“The design, manufacture, distribution and servicing of Nitrous Oxide – Oxygen Sedation Flowmeters, Gas
Scavenging Systems, Gas Distribution Systems and Office Communication Systems for use by a physician, dentist
or licensed healthcare Profession.”
Check our website: www.porterinstrument.com for additional information.
To register your product: www.porterinstrument.com/resources-dental choose Warranty tab.
To download a User’s Manual: www.porterinstrument.com/resources-dental choose Manuals tab

2
IMPORTANT:
READ MANUAL COMPLETELY Before Operating This Device
Basic delivery technique is described. Also, this manual contains instructions on periodically required checks to
be performed by the user. These checks are necessary to insure the proper performance of this device and its
safety features. Retain this manual for future reference.
WARNINGS AND PRECAUTIONS
These warnings and precautions are to help you to
understand how to safely operate the MXR Flowmeter.
A WARNING alerts you to a possible hazard to people.
A CAUTION alerts you to the possibility of equipment
damage.
WARNING: Do not use this device for the
administration of general anesthesia or as a part of, or
in conjunction with, a general anesthesia administration
system.
WARNING: Workers are exposed to N2O during
administration of N2O/O2 conscious sedation analgesia.
NIOSH has recommended that exposures should be
minimized. Contact NIOSH (1-800-35-NIOSH) to
receive NIOSH Publications on Control of Nitrous Oxide
in Dental Operatories. Exposure can be minimized by
effective controls. National Institute for Occupational
Safety and Health (NIOSH) publications state that
controls, including System Maintenance, Ventilation
and Work Practices can effectively reduce N2O
concentrations in patient procedures. Your flowmeter
accessoryPorter scavenger system is an important part
of the system of controls.
WARNING: Porter Instrument equipment utilizes the
cross+protection system. The flexible hose and
connectors that connect to the flowmeter are diameter
indexed; 3/8” O.D. for Nitrous Oxide and ½” for Oxygen.
The cross+protection system is designed to prevent
misconnection of Oxygen and Nitrous Oxide piping. DO
NOT ATTEMPT TO CHANGE THE DIAMETERS OR
CONNECTORS OF THE FLOWMETER! Tampering
with the cross+protection system constitutes
acceptance of liability by the installer. For your own
protection, as well as that of the Doctor and the patients,
use 3/8” O.D. tubing for all Nitrous Oxide lines and ½”
O.D. tubing for all Oxygen lines.
To assure safe operation and conformation to local fire
codes, all Porter Instrument flowmeter systems are
designed to be used with sedation delivery systems
mounted inside walls and they meet or exceed the
guidelines established by the National Fire Protection
Association for Nonflammable Medical Gas Systems,
NFPA 99. Copies of NFPA 99 or portions thereof may
be obtained by writing to: National Fire Protection
Association, Batterymarch Park, Quincy, MA 02269-
9904; or call 1-800-344-3555
WARNING: New or modified installations - properly
connected gas pipelines are absolutely essential to
patient safety. The authorized distributor or contractor
should provide written documentation that all gas
pipelines are connected properly and that the system
has been pressure tested prior to use. While this is a
good business practice, it is important that the user
verify by their own test, independent of the authorized
distributor or contractor, that all gas pipelines are
connected correctly prior to using the system. The
ultimate responsibility of assuring that lines are not
crossed rests with the user.
WARNING: During any power outage, remember to
turn OFF the flowmeter and manually turn OFF the tank
valves. With centralized, electrically powered gas
systems, if gas was flowing when the power went out
and the flowmeter is left ON, gas will be flowing when
the power is restored.
CAUTION: This device is for use by or on the order of
a physician, dentist or licensed healthcare professional.
CAUTION: Always use clean, dry medical grade gases.
Introduction of moisture or other contaminants into this
device may result in defective operation.
CAUTION: Do not attempt to repair, alter or calibrate
this device. Unauthorized repair, alteration or misuse
of this device is likely to adversely affect the
performance and will void the warranty.
CAUTION: Never oil or grease any part of this
system (minimize fire or explosion potential).

3
Symbol Description
MEDICAL EQUIPMENT WITH
RESPECT TO ELECTRIC
SHOCK, FIRE AND
MECHANICAL HAZARDS IN
ACCORDANCE WITH UL 2601-1,
AND CAN/CSA C22.2 NO. 601.1
Alternating Current
Protective Earth (ground)
Attention, consult the accompanying documents
WARNINGS and PRECAUTIONS
ELECTRICAL CONNECTIONS & GROUNDING INSTRUCTIONS
The unit must be grounded. If it should malfunction or breakdown, grounding provides a path of
least resistance for electrical current to reduce the risk of electric shock.
A known Protective Earth (ground) connection must be made via one of the following methods:
1) The third wire on the power cord when plugged into an appropriate outlet that is properly installed and
grounded in accordance with all local codes or ordinances.
2) The external ground lug on the rear of the device.
A Protective Earth (ground) connection is a connection attached to the facility grounding point outside the facility.
A licensed electrical person should be consulted to confirm the Protective Earth (ground) connection.
Do not use an electrical cord with nicks, cuts, or other damage. Do not use the unit with an
extension cord as it will be subject to electromagnetic interference (EMI).

4
REQUIREMENTS AND FEATURES
BAG TEE REQUIREMENTS
A bag tee containing an air inlet valve is required for use with this unit. The bag tee is factory mounted on the unit
or provided separately for remote mounting. Matrx by Parker Scavenging Nasal Inhalers provide the patient
connection.
FACILITY PIPING
The user MUST perform tests independent of the dealer or contractor to verify that all pipelines are connected
correctly. If you are unfamiliar with piping systems, order Matrx manual 10311700. The user has the ultimate
responsibility for properly connected pipelines essential to patient safety.
DIAMETER INDEXED SAFETY SYSTEM
Gas connections in the DIGITAL MDM mixer are mechanically indexed using the Diameter Indexed Safety
System (DISS). This feature helps to prevent the crossing of pipelines. Under no circumstances should these
connections be altered.
DISCONNECT POWER
There are no user-serviceable parts inside this unit. A shock hazard exists if power is not
disconnected prior to any internal servicing or maintenance. Always disconnect the power
source before inspection or repair.
ALARM TEST
The user should test the alarm system for proper operation prior to each clinical use.
INTENDED USE: FLOWMETER FOR ANALGESIA DELIVERY SYSTEM
This device is intended for patient use by an attending physician, dentist or licensed professional properly trained
in its use. Porter Instrument recommends the user be thoroughly familiar with the use of Nitrous Oxide - Oxygen
Conscious Sedation for patient analgesia and be properly trained in its administration prior to using this product.
For training requirements on the administration of Nitrous Oxide - Oxygen Conscious Sedation, contact the
appropriate regulatory authority in your country, state, or province. Training is recommended to provide a practical,
hands-on capability and an understanding of the behavioral aspects of Nitrous Oxide Sedation and will complement
the safety features of this device. The devices permit the operator to adjust the percent of oxygen through a range
of 100% to 30% (and thereby control the ratio of oxygen to nitrous oxide). The operator can also control the total
volume of mixed gas up to 9.9 liters per minute.
Use Scavenging
Monitor for N2O in the patient treatment area to insure that controls are effective in achieving low levels of PPM
(parts per million) exposure. Contact your Porter dealer for details on monitors and testing.
Gas Supply Connection
After installation of the flowmeter, connect the nitrous oxide and oxide supply lines to the Diameter Indexed Safety
System (DISS) fittings located on the back of the flowmeter unit. It is important that the regulators for both gases
be set to give pressures in the range of 53 PSIG ±2 PSIG. Confirm the absence of leaks at pressure connections
on the unit. Bubbles will appear at leaking locations when a soap / water solution is used. This procedure is
recommended each time a cylinder is changed. Refer to FM-916 Mobile “E” Tank Stand Installation and Instructions
for connecting gas supply to the flowmeter and tank installation to mobile stand.
User Responsibility
This product should not be repaired other than in accordance with written instructions provided by Matrx by Parker.
The user of this product shall have the sole responsibility for any malfunction which results from improper use, faulty
maintenance, improper repair, damage, or alteration by anyone other than Matrx by Parker. It is the user’s
responsibility to ensure that the correct gas, at the correct pressure, is supplied to the fittings at the rear of the unit.

5
Machine Diagnostics
The DIGITAL MDM mixer performs self checks at start up and during operation. If any errors are detected, the unit
displays EE on the %O2display and an error code on the FLOW display. If an error code appears, remove the unit
from patient service and call the Matrx by Parker Technical Service Department at 1-888-723-4001. To aid in the
diagnostics of the unit, make note of the final error code displayed.
Description of Unit: The DIGITAL MDM® mixer is shown in Figure 1. The device permits the operator to adjust
the percent of oxygen through a range of 100% to 30% (and thereby control the ratio of oxygen to nitrous oxide).
The operator can also control the total volume of mixed gas up to 9.9 liters per minute.
Mixture Control: The DIGITAL MDM mixer precisely mixes oxygen and nitrous oxide from local cylinders or
pipeline gas systems, and delivers the electronically controlled mixture to the bag tee outlet.
Built-In Safety: A series of alarms (see Safety Alarm System page 5) alert the user to any problem condition within
the DIGITAL MDM mixer unit or in the gas supply.
Displays and Indicators: In the following, the location numbers refer to Figure 1.
Flow Display: The LPM FLOW display (4) normally displays the total gas flow rate. It also displays the individual
nitrous oxide or oxygen flow rates when either the N2O or O2flow display controls (6) are pressed. The gas flow
being displayed is indicated in the flow indicator (5) by O2, TOTAL or N2O.
% OXYGEN Display: The % OXYGEN display (3) indicates the oxygen concentration set point in the total flow.
Gas Flow Indicators: Gas flow is indicated by bar graph LEDs (1). A green bar graph represents O2while blue
represents the N2O flow. The number of lit bars gives a graphical indication of the flow level of a particular gas.
Figure 1. Matrx DIGITAL MDM® Mixer Front Panel (figure shows all LEDs illuminated)

6
SAFETY ALARM SYSTEM
There are four alarm conditions on the DIGITAL
MDM® mixer. They appear in the safety alarm
display (see Figure 1, item 2) only when conditions
warrant. Otherwise, they are not visible. The alarm
conditions are:
OXYGEN FAILURE: This alarm indicates that the
set oxygen (O2) flow cannot be delivered. Check
the oxygen supply. During an OXYGEN FAILURE
alarm, the nitrous oxide delivery is automatically
shut off. The LPM FLOW and % OXYGEN displays
are off.
NITROUS FAILURE: This alarm indicates that the
set nitrous oxide (N2O) flow cannot be delivered.
Check the nitrous oxide supply. During a NITROUS
FAILURE alarm, the LPM FLOW display indicates
oxygen flow and the % OXYGEN display is off.
Both the OXYGEN FAILURE and NITROUS
FAILURE are self-canceling alarms. When the gas
is restored, the unit returns to the flow rate and
mixture ratio which were in effect before the alarm
condition.
1 LPM OXYGEN LIMIT: This message is displayed
when the oxygen flow rate reaches a value of 1
LPM (liter per minute); the unit will not allow the
oxygen flow rate to go below this value. If the user
attempts to lower the % OXYGEN while this
message is displayed, the unit compensates by
increasing the total flow rate.
FLUSH FLOW LOW: This message indicates that
the oxygen flush flow rate is less than 10 LPM.
Check the oxygen supply pressure.
CAUTION: Operate key pad with finger
pressure only. Do not use hard or sharp
objects. Failure to do so may result in
DAMAGE to front panel.
KEY PAD CONTROLS
On/Off Key: The ON/OFF key controls the operation
of the unit. Momentarily depressing the ON/OFF key
changes power state from OFF to ON or ON to OFF.
Note: If the power to the unit is interrupted and then
restored, either by disconnecting / reconnecting the
power cord or by local power failure, the unit will display
OFF. The operator must press the ON/OFF key to
restart the unit. The unit will them display default values
of 100% oxygen at 5 LPM.
CAUTION: After turning the device off, or when the
unit is not in use, all oxygen and nitrous oxide
supply cylinder valves must be closed.
Flow Control: The LPM FLOW key pad [or ]
controls the total flow rate delivered bythe unit. Pressing
the appropriate key momentarily increases or
decreases the total flow rate by 0.1 LPM. By pressing
and holding a key, the total flow rate indication changes
slowly for the first two steps, then changes at a faster
rate for the remainder of the time the key is held. An
audible signal indicates that a limit has been reached.
%O2Control: The % OXYGEN key pad [or ]
controls the percentage of oxygen delivered by the unit.
Press the appropriate key momentarily to increase or
decrease the oxygen percentage one step (1% or 5%).
Pressing and holding the key changes the oxygen
percentage slowly for the first two steps, then faster for
the remainder of the time the key is held. This varies the
ratio of oxygen to nitrous oxide. An audible signal
indicates that a limit has been reached.
Setting % OXYGEN Step Amount (1% or 5%):
The DIGITAL MDM® mixer is shipped from the factory
programmed to change 1% for each press of the %
OXYGEN key pad [or ]. The amount can be
changed from 1% to 5% by using the DISPLAY N2O and
DISPLAY O2keys and the following procedure:
1. Press and hold the DISPLAY N2O key.
2. While pressing the DISPLAY N2O key, press the
DISPLAY O2key until the audible alarm sounds.
3. Release both keys.
The audible signal indicates the change has occurred
and is programmed in memory. The unit will remain in
the new mode until this sequence is repeated.
Unplugging or turning the unit off will not affect the
programmed mode.

7
Flow Display Control: The key pad DISPLAY O2or
DISPLAY N2O select the gas flow rate displayed on the
flow display. Press and hold the DISPLAY N2O key to
display the nitrous oxide component of the total flow.
Press and hold the DISPLAY O2key to display the
oxygen component of the total flow. If neither key is
held, the LPM FLOW display indicates the total gas flow.
Oxygen Flush Key: Pushing the O2FLUSH key
delivers 100% oxygen directly to the mixed gas outlet at
the rear of the unit. This outlet is connected to the patient
through the breathing tube connector (see Figure 2).
While the key is pushed, 100% oxygen is delivered
continuously at an approximate flow rate of 20 LPM.
Releasing the key returns the unit to the flow rate and
mixture ratio which were in effect prior to the flush.
Alarm Test/Silence Key:The alarm test / silence key
serves two functions. When pressed, all the display,
indicators and the audible alarm turns ON. This key also
silences the audible alarm when a NITROUS FAILURE
condition exists. The audible alarm will be silent for
about five minutes and then resume, unless the failure
condition has been corrected.
Machine Diagnostics
The DIGITAL MDM® mixer performs self checks at start
up and during operation. If any errors are detected, the
unit displays EE on the % OXYGEN display and an error
code on the LPM FLOW display. If an error code
appears, remove the unit from patient service and call
the Matrx by Parker Technical Service Department at 1-
888-723-4001.
To aid in the diagnostics of the unit, make note of the
final error code displayed.

8
General Installation
Refer to FM-916 Mobile “E” Tank Stand Installation
and Instructions for connecting gas supply to the
flowmeter and tank installation to mobile stand.
If the optional Scavenger Control Valve was
purchased separately, align it with the 2 holes on the
base of the mixer. Secure with the (2) #10-32 screws.
Following the instructions provided with the
scavenging system, connect the Scavenger Control
Valve to the vacuum system.
Installation of Rubber Goods
The assembly procedure for the DIGITAL MDM®
mixer follows (see Figure 2):
1. Slide the breathing bag opening over the outside
diameter of the bag mount.
2. Slide the 15mm fresh gas connector from the
scavenger into the breathing tube connector.
3. If an accessory, such as the Scavenger Control
Valve is used, connect it following the instructions
supplied with it.
Figure 2 Installation of Rubber Goods.
Installation of Power Cord
Insert the power cord into the input connector on the
rear of the unit (see Figure 4).
WARNING
For safety a Protective Earth (ground) connection
must be made through power cord 3rd wire or Ground
Lug (see Figure 4).
WARNING
Not providing a valid Protective Earth (ground)
connection can result in the risk of electric shock.
Connection of Oxygen –Nitrous Oxide
For safety reasons, gas connections are color-coded
and mechanically indexed using the Diameter Indexed
Safety System (DISS) to prevent accidental cross
connection. DISS female hexagon fittings are standard
for both hoses.
1. Connect the DISS female hexagon fitting of the
nitrous oxide hose to the male DISS, N2O INLET,
fitting on the back of the mixer head (see Figure
3). Hand-tighten and then finish tightening with a
7/8” inch open end wrench (approximately 1/8
turn). Do not over-tighten.
2. Connect the DISS female hexagon fitting of the
oxygen hose to the male DISS, O2INLET, fitting
on the rear of the unit (see Figure 3). Hand-tighten
and then finish tightening with a 11/16” inch open
end wrench (approximately 1/8 turn). Do not over-
tighten.
Hoses
Hoses are manufactured for connection to the gas
source in various configurations:
- Quick Connect fittings are designed for rapid “no
tool” connections with corresponding male /
female fittings or outlet stations. Refer to the
individual manufacturer’s instructions for specific
connection procedure.
- DISS to DISS hoses are designed primarily for
portable systems. The gas source (male) DISS
fittings are located on the regulators on the
cylinder mount block provided with the portable
units. Connect the DIGITAL MDM® mixer to the
cylinder mount block using the appropriate nitrous
oxide hose and the oxygen hose.

9
Demand Valve Resuscitator
An optional Demand Valve Resuscitator for
emergency oxygen resuscitation is available
from Matrx (PN 91505085) and connects directly
to the O2outlet (Figure 3) on the rear of the unit.
Figure 3. Connection to the back of unit.
Figure 4 Installation of Power Cord.
Power
Cord
N2O DISS
O2DISS

10
SIDE EFFECTS & CONTRAINDICATIONS
Note: This is not an exhaustive list. The list was prepared from published articles.
Possible Side Effects of Nitrous Oxide –Oxygen Conscious Sedation: May experience nausea,
vomiting, excessive sweating, euphoria, excitement, deep sedation, drowsiness, sleep, dizziness,
lightheadedness, dysphoria, amnesia, and headaches.
Precautions and Contraindications for Nitrous Oxide Use
Precautions/Relative Contraindications
Discontinue the Nitrous Oxide delivery if observed: prolonged inspirations, irregular
breathing, involuntary eye movements, swallowing or gagging, dilated pupils and rigid
muscles.”
Side effects (e.g., nausea, vomiting, dizziness, dysphoria, etc.) are not tolerable.
Current vitamin B12 deficiency.
Bronchoconstrictive disease (asthma) –(at determination of medical professional).
The use with pediatric patients, especially age 1 to 4 years, requires caution and specific
protocols developed by the medical professional; upper age limit at determination of
medical professional. Weight limitations at the determination of medical professional.
Contraindications
Inability to hold own face mask, impaired oxygenation, or hemodynamic instability
Acute drug or alcohol intoxication or impaired consciousness (head injury, endocrine or
metabolic disease, patients taking antidepressant or psychotropic drugs), psychologic
impairment, patient who has taken medication to induce sleep.
Decompression injuries, increased intracranial pressure, increased intraocular pressure,
intraocular surgery, bowel obstruction, middle ear surgery, emphysema, pulmonary
hypertension and others
Current upper respiratory tract infection, chronic obstructive pulmonary disease (COPD),
cystic fibrosis, shock, acute pulmonary edema (APE), pneumothorax, and major chest or
maxillofacial trauma, bleomycin therapy, recent pneumoencephalography
Pregnancy (first trimester) –patient may wish to contact OBGYN / medical professional