Porter NITRONOX HD User manual

FM-1309 Rev B 04/2018 www.porterinstrument.com/nitronox
NITRONOX HD SCAVENGER SYSTEM
USER’S MANUAL / INSTRUCTIONS
Examination
All components should be removed from their respective shipping containers and examined. Any
omissions and/or damage should be reported to the Porter dealer, immediately.
User Responsibility
The Nitronox®HD Scavenger System is designed for use with the Nitronox HD Inhalation Analgesia
System (Refer to Instructions FM-1308), and to perform in accordance with specifications herein when
installed, operated and maintained as instructed in this manual. It should be carefully read and
understood prior to operation and use of the scavenger system.
Warnings
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 Porter or Authorized Distributor
for details on monitors and testing.
The Nitronox Scavenger System is intended to be used by medical personnel trained in its use and
the use of nitrous oxide and oxygen for medical applications.
An EXPLOSION hazard exists when flammable agents are exhausted into the vacuum system
(Page 7).
The Nitronox Scavenger interface is supplied with a removable flow resistor. This foam resistor
must be REPLACED every six months to help prevent the possibility of increased resistance due to
particle entrapment (Page 8).
Medical 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 accessory Nitronox Scavenger
System is an important part of the system of controls in medical settings.

Manufacturer:
Parker Hannifin Corporation
Precision Fluidics Division
Porter Instrument
245 Township Line Road
Hatfield, PA 19440
Office 215 723 4000
Fax [phone]
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

Nitronox®HD Scavenger System - Description
The Nitronox HD Scavenger System is a device for the removal of patient exhaled O2
/ N2O gas mixtures generated from the Nitronox Inhalation Analgesia System. The
exhaled gases are routed through the device to a remotely located central vacuum
system. The Nitronox Scavenger and central vacuum systems provide dilution and
disposal of mixed waste gases. The scavenger system consists of components
necessary to transfer patient exhaled gas mixtures to the source of vacuum at the
wall.
Ambient opening (foam resistor)
Fig. 1
Limit Orifice
Drain Valve
The system components are (Fig. 1):
A Manifold Mount (Fig. 1.2) located to seal the exhaust ports of the Demand [breathing] Valve
(Figs. 1.2, 1.3).
A cylindrical Interface (Fig. 1.1) to connect the central vacuum system with the scavenger
collection manifold. It contains:
oOrifices to limit vacuum pressure and flow.
oOpening to ambient to help prevent over/under pressurization of the patient exhaust
circuit.
oA valve to automatically drain any internal condensation.
The Interface is connected to the rear of the support pole to the Hospital Nitronox HD unit.
A corrugated 19mm hose (Fig. 1.4) to connect the Manifold Mount Assembly to the Interface.
The hose is an integral part of the disposable Medical Breathing Circuit.
2
Fig. 1.1
Interface
Fig. 1.2
Demand Valve
Manifold
Mount
Fig. 1.4
19mm Hose
Fig. 1.3
Demand Valve
Manifold Mount
Assembly

Nitronox®HD Scavenger System - Description
The gas flow path through the scavenger system starts with patient exhalation into the exhaust ports of
the demand valve and then to the tee of the disposable Medical Breathing Circuit through the one-way
valve into the 19 mm scavenger hose. The hose leads the gas into the scavenger interface. The
interface is open at the top to ambient via a calibrated foam resistor. In addition, the interface contains
an internal pathway for gas passage permitting waste gas to follow a preferential path to wall vacuum.
From the internal pathway of the interface, the waste gas flows through a ball-type control valve to a
calibrated orifice contained within the barbed wall vacuum connector. The final gas path is through the
DISS or QUICK connect vacuum hose to the wall vacuum outlet and the central vacuum pump system
(or appropriate connections to a portable vacuum source).
If central vacuum flow through the calibrated orifice exceeds the exhaled flow from the patient, room air
will be drawn from ambient into the vacuum system via the scavenger interface. Also the internal
volume of the interface acts as a surge chamber to absorb a short duration of excessive patient flow.
During this short duration, excess gas will fill the interface allowing time for the vacuum flow to exhaust
the gas during the next patient inspiration. Under abnormally large exhalations, it is possible that the
excess exhaled gas may exceed the capacity of the interface chamber, and exhaust to ambient. This
entrance and exit of gas to ambient is a feature operating only during transient unbalanced periods.
Control of excess flow from the central vacuum through the orifice is provided by the ball control valve.
The ball valve limits the central vacuum flow between an upper (maximum) and a lower (minimum)
limit. No control other than the passive interface capacity and preferential flow path within the interface
is provided for excess patient exhalation such as during a cough.
An automatic relief valve is provided in the bottom of the interface to prevent condensation from
causing a water seal of any internal gas passages. This is another feature operating only when
condensation occurs.
Installation
Mobile Stand Mount
Connect the cylindrical Nitronox Scavenger interface to the center column assembly of the Mobile
Stand (Figs. 2.1, 2.2). Use the mounting clips of the interface to position the assembly on the column.
Orient the interface assembly vertically with open end (foam resistor) up and condensation relief drain
valve down.
Fig. 2.2
Fig. 2.1
3

Installation
Mobile E-Stand Mount
The Porter Mobile E-Stand is for use with two “E” cylinders of O2and two “E” cylinders of N2O (Figs.
3.1, 3.2). The two pressure gages reflect cylinder pressure only. When the gas supply is opened, gas
will flow through the check valves into the block and be regulated down to 50 PSIG (3.4 bar) at the
regulators, out through the hoses to the Nitronox. The check valves prevent the gas from flowing
between cylinders or out into the room if only one cylinder is in use. Each Mobile Stand may be
adjusted to a desired height for use and storage. Refer to FM-916 Mobile E-Stand Installation and
Instructions for information on monthly checks, cylinder installation, height adjustment, check valve
replacement.
Connect the cylindrical Interface to the center column assembly of the Mobile E-Stand. Use the
mounting clips of the interface to position the assembly on the column. Orient the interface assembly
vertically with ambient open end (foam resistor) up and condensation relief drain valve down. Position
the interface between the four cylinder positions as shown in Fig. 3.1 (cylinders are closer together on
opposite side).
4
3
Fig. 3.2 E-Stand
with Nitronox &
Scavenger
Fig. 3.1 E
-
Stand with 4 cylinders
Full Face Mask
E
-
Stand Block
Line Pressure
Gages
Mixture Pressure
19mm
Hose
Drain Valve
O
2
Cylinder
N
2
O Cylinder
Cylindrical
Interface
Cylinder
Pressure
Gages
Nitronox Main
Housing
Ambient
Opening
Disposable
Medical
Breathing
Circuit

Installation
Wall Mount: Figs. 4, 5
1. Hold the scavenger interface against the wall in the desired mounting location.
2. Mark four mounting-hole locations on wall using the interface mounting plates as templates.
3. Drill four holes in the locations marked:
Note:
For dry wall or plaster, drill hole suitable for a screw attachment.
For wooden studs, drill appropriate pilot hole, 1-1/2 inches (4 cm) deep to accept mounting
screws.
4. Insert appropriate receptacle (not provided) in hole, if necessary.
5. Mount the scavenger interface using four screws (not provided) in the prepared locations (Fig. 4).
Note: Mounting installation must be done on both the top and the bottom brackets.
Fig. 4 Scavenger Wall Mount Fig. 5 Nitronox Housing Wall Mount
5

Hose Connections: Fig. 7
1. Connect the 19 mm scavenger hose of the disposable Medical Breathing Circuit to the Interface
(Fig. 7.1).
2. Connect vacuum hose between the vacuum source inlet (using appropriate connection such as
DISS, QUICK connect, etc.) and the barbed outlet connector on the interface. Push the tubing on
the barb so that two to three barbs are covered.
Note: Hold the barbed outlet while pushing tubing onto barb to reduce excess strain.
19mm Hose Connection
Barbed Outlet Connection
Warning
An EXPLOSION hazard exists when flammable agents are exhausted into the central vacuum system.
6
Fig. 7
Fig. 7.1

Preparation of Nitronox HD Scavenger Parts for use with Porter Medical Breathing
Circuit
For further details, refer to Nitronox HD User’s Manual FM-1308 and Porter Medical Breathing Circuit
FM-1304
1. Attach Demand Valve Manifold Mount Assembly to the
right side of the Nitronox HD using one screw on the top
(Fig 8.1) and one screw on the bottom (Fig 8.2).
Fig. 8.1 Fig. 8.2
2. Push Demand Valve into Manifold (two sealing o-rings). (Fig. 9) Fig. 9
3. Tighten thumb screw of Retaining Bracket to the side of the Manifold to secure
the Demand Valve (Fig. 10)
4. Connect the Gas Delivery Hose to Demand Valve (Fig. 11). This is a quick connect attachment.
Push the two ends together until click sound is heard. To remove – push the metal clip in – and pull
apart.
5. Attach Mask Hanging Bracket to the Left side of the Nitronox HD (Fig. 12).
Fig. 12
6. Assembled Nitronox HD unit (Fig. 13).
Fig. 13
7
Fig. 10
Fig. 11

Operation
1. Connect wall or Mobile E-Stand gas supplies – O2 and N2O. Connect vacuum source to Nitronox
Scavenger barb.
2. For best scavenging vacuum flow, turn the ball valve lever to the vertical (full on position) (Fig.
14).
Note: With the ball valve lever in the full on position, the vacuum flow should accommodate
the exhaust gas from all normal breathing patterns (30 – 35 LPM, maximum).
3. If the overall demand for vacuum is overloading the central system, the ball valve may be slightly
throttled to reduce vacuum flow by turning the ball lever to the 45º from vertical position.
Note: With the lever in the 45º from vertical position, the ball valve will still allow a vacuum
flow of 8 to 12 LPM, minimum.
4. The interface is designed so that condensed water vapor should discharge from the bottom, if its
volume exceeds 40 to 50 cc/mL.
USING THE PORTER MEDICAL BREATHING CIRCUIT WITH NITRONOX
1. Attach disposable breathing
circuit "tee" to demand valve on
side on Nitronox unit (Fig. 15) Fig. 15.
Fig. 16
2. Connect magenta hose of the disposable
breathing circuit to the scavenger (Fig. 16).
3. Attach mask or mouthpiece (not included)
to elbow (Fig. 17). Fig. 17
Fig. 18
4. Hang mask in cradle of hanging bracket (Fig. 18).
5. Dispose breathing circuit and mask after use.
8
Fig. 14

Maintenance
Cleaning
We recommend the use of an approved disinfectant for the dental / medical environment for cleaning
the outside of the Nitronox Scavenger System. (See Nitronox User’s Manual / Instructions FM-1308 for
special demand valve cleaning instructions). Do not spray disinfectant directly onto housing. Spray
disinfectant into disposable towel and wipe unit thoroughly removing excess disinfectant to eliminate
buildup.
CAUTION: Introduction of moisture or other contaminants into this device may result in defective
operation.
CAUTION: Never oil or grease any part of this system (minimize fire or explosion potential).
Field Replacement
1. Replacement of the foam flow resistor PN 61962300 (refer to Figure 1.1) approximately every six
months and periodic replacement of the Scavenger Hose Assembly.
Warning
The foam flow resistor is to be replaced approximately every 6 months to help prevent the
possibility of increased resistance due to particle entrapment.
2. Pull the foam resistor (one inch, diameter, by six inches, long) from the top center hole of the
interface cylinder with the use of forceps or needle nose pliers.
3. Using a 12-inch long (30 cm), stiff strip of music wire (or equivalent), insert a new foam resistor into
the interface top-center hole until the top of the foam resistor reaches the lower edge of the
horizontal vent holes.
4. Remove the wire, holding top of the foam resistor with the forceps or needle nose pliers.
Replacement Parts: Contact Porter
9