Page 32 - Home Care Catalogue Edition 4A
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Device Filtration • Filters
Device  ltration
As a specialist in respiratory care and  ltration Intersurgical is pleased to offer a wide range of  ltration solutions for devices which are in common use for the treatment of patients with respiratory problems. There is a  ltration solution offered for the most common devices present in the market.
Obstructive sleep apnoea (OSA) can have a major impact upon the health and life of the individual, but it is a treatable condition. Treatment options include the use of a Continuous Positive Airway Pressure (CPAP) device, that prevents the airway from collapsing by delivering a continuous supply of compressed
air via a mask whilst the patient is sleeping. In severe cases a bilevel device which delivers different pressure during the inspiratory and expiratory breath may be required to allow normal uninterrupted sleep.
Why use a  lter?
All CPAP and bilevel machines have a  lter, normally located at the air intake on the back or side of the machine.
The CPAP machine takes in room air,  lters and pressurises it to deliver therapy to help prevent the airway from collapsing during sleep. These devices can also attract debris from the environment, which, may include dust, pet hair, smoke, and other potential allergens. The  lter is designed to clear these elements from the air before it reaches the patient’s lungs.
How often should I change the CPAP  lter?
It is very important to regularly change the CPAP  lters. If these become dirty, the air that is breathed in with the device will likewise be unclean. In general it is recommended that the  lters be changed or cleaned at least once per month.
If the device is being used in a particularly dirty or dusty environment, it may be sensible to replace the  lters more often. Regular checking of the  lter will determine how dirty it is becoming and whether increased replacement is necessary. Even if the  lter appears clean, it should be replaced on at least a monthly basis or in line with recommendation of the original manufacturer.
What are oxygen concentrators?
An oxygen concentrator is a portable or electrical device
that extracts air from the surrounding environment, providing oxygen therapy to a patient via nasal cannula at higher concentrations than available in ambient air. They are used as a safer, less expensive and more convenient alternative to tanks of compressed oxygen.
Drawn air from the environment is passed through a cylinder  lled with zeolite pellets where it is compressed to a few times normal atmospheric pressure (typically 20 psi/138 kPa gauge, or 2.36 atmospheres absolute) and passed through the zeolite bed. The bed adsorbs the nitrogen, leaving nearly-pure oxygen in the output - up to 90–95%. There is a compressor inside the machine that can make a noise during use. The reservoir and the concentrator have limited storage, so virtually all the oxygen saved is released into the oxygen tubing for delivery to the patient.
Why is a  lter required?
Ambient air contains millions of particles, some of which will be sub-micron. Particles of this size can easily enter and clog the working components of the machine or penetrate deeply into the lungs of the patient.
Air  lters are therefore required to:
1. Protect the oxygen concentrator
2. Protect the patient from particulate matter and the risk
of infection
3. In some instances they function as a dampener to reduce
the level of noise emitted by the machine
Suction devices
These devices provide a source of negative pressure and a collection chamber to allow the safe removal of bodily  uids and secretions.
These devices are prone to both damage and contamination if they are exposed to bodily  uids due to operating errors, the position of a high quality hydrophobic bacterial and viral  lter between the suction pump and the secretion canister will help prevent this possibility.
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