Oxygen Conserving Devices

For patients on continuous oxygen therapy, oxygen conserving devices (OCD) is a great option. These devices regulate the flow of oxygen between the patient and the oxygen cylinder. Factual information states that a person inhales 1:3 times and exhales 2:3 of the time. That means 2:3 of the oxygen gets wasted while the patient exhales. To control this wastage conserving devices are helpful. OCDs greatly increase the time for which an oxygen reservoir can be used i.e. it will last for three times more than the cylinder without the device.

Benefits of OCDs

  • OCDs provide for increase mobility and comfort as it avoids the continuous flow of oxygen into the nostrils, thereby making oxygen therapy less intrusive and effective. 
  • People with chronic diseases like Cancer, cardiopulmonary diseases or COPD can choose to travel with smaller tanks compared to multiple tanks in the past without OCDs
  • OCDs reduce the frequency of refills and deliveries. The cylinders now last as long as 3-5 times the normal. 
  • If in any case the Conserving device fails to work, it will switch to continuous flow.

With OCDs you can conserve a handsome amount of oxygen so there will be a lesser need for refill. Hence buying an OCD is more economical and less wasteful. Buy Oxygen conserving devices from renowned brands like Evolution , Bonsai, Oxymizer and more with expertise in respiratory products at attractive prices on HPFY.



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Types of Oxygen Conserving Devices:

Fixed Pulse OCDs

These devices initiate when a person takes a breath. The fixed pulse concentrators release a fixed volume of oxygen when initiated and stops at a preset limit. The flow rate is high in the initial period that permits the released volume to be delivered in the initial phase of inhalation. The volume of oxygen released vary by manufacturers and the specific devices. These devices are intended to produce a rate of oxygen flow similar to continuous flow. The rate of flow varies from 5 ml to 22 ml per setting per breath. Like the Invacare Element Pneumatic Oxygen Conserver.

Demand-pulse OCDs

These devices are also breath initiated but post-delivery of the initial volume of oxygen these OCDs continue to deliver a fixed rate of oxygen i.e. 2 liters/minute, until exhalation depending on the manufacturer. Some devices have a diminishing flow rate until the valve closes stopping the flow completely. The oxygen delivered in the last one third part of the breath is considered to be wasted as it falls in the anatomical dead space of the breath.


Oxygen Conserving Devices or Flow control regulators are reduce the pressure and are designed to regulate or lower oxygen pressure coming directly from an oxygen cylinder to a level that can be safely used by the patient. Browse our catalogue to find the device that best suits your requirement and be assured to get a product that delivers quality and value both at the same time.