DEMAND VALVE INSTRUCTIONS
Description:
The demand valve of the Nitronox Inhalation Analgesia System is designed to be
used with a full face mask (Porter recommends a standard, single use, disposable mask, not
supplied sterile, DEHP-free, Latex-free, with materials chosen by the manufacturer for
biocompatibility in a medical setting) for administration of nitrous oxide to a breathing patient. It
contains no buttons or levers to force the gas into the patient and is for self-administration.
Do not strap mask on patient. Allow the patient to hold the mask over the nose and mouth to self-
administer. Upon inhalation, the demand valve opens and the nitrous oxide / oxygen mixture will
start to flow. Ceasing to inhale or if the patient stops breathing, the valve automatically closes to
stop the flow of the nitrous oxide / oxygen mixture.
WARNING:
Do not use near open flame or in an unventilated area. Can accelerate
burning and be toxic.
Specifications:
Flow: The demand valve (through the Nitronox housing) is to be connected to a nitrous oxide
supply capable of delivering a minimum of 100 LPM @ 40-90 psig (2.8–6.2 bar). The valve itself:
160 LPM set flow: As required in demand mode 0-160 LPM at 40 psig.
Inlet fitting: Standard male DISS.
Filter: 2 micron sintered stainless steel.
Outlet: 22 mm outside diameter x 15 mm inside diameter (fits standard medical masks).
Materials: Housing and plastic parts: “Noryl”, polyester, polysulfone. Moving and adjusting parts:
Stainless steel. Fasteners: Steel, brass and aluminum all plated for corrosion resistance. Rubber
parts (except hose): Silicone
Maintenance: Cleaning (specific to the demand valve)
WARNING:
Since the described cleaning procedures for the
demand valve
call
for disassembly of components, the procedures must be performed in a
hydrocarbon residue free area because of the danger of spontaneous combustion
when the residues are exposed to nitrous oxide.
Standard Cleaning and Disinfecting After Use
1. Remove (unscrew) the outlet adapter housing (mask connection outlet) and remove
(lift) the exhalation valve assembly (with attached flapper valve) from the main demand
valve subassembly. Do not remove the hose assembly.
2. Clean all foreign matter from the adapter housing, exhalation valve assembly, and
outside surfaces of main demand valve subassembly with mild soap solution, being
careful not to get any liquid inside the demand valve subassembly. Rinse the parts
thoroughly in clean water.
3. Carefully examine the three assemblies of the demand valve. Discard and replace any
cracked or damaged parts. Contact Porter for replacement assemblies.
4. Disinfect the demand valve (and collection manifold).
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