Information For Patients

Whilst we hope this website provides useful and practical information and answers to questions you may have, please remember that your clinical team know far more about you and your health than we can ever do, so they are your first point of contact for information about your wound care.

You will have been given a contact number for your Nurse, and you should use this number if you have further queries.

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Your Doctor or Nurse has chosen to prescribe NATROX® Oxygen therapy to assist in healing your wound. Whilst we hope this website provides useful and practical information and answers questions that you may have, please remember that your clinical team know far more about you and your health than we can ever do, so they are your first point of contact for information about your wound care. You will have been given a contact number for your Nurse, and you should use this number if you have further queries.

Our contact details are:

Tel: +44 (0)1763 209007
Fax: +44 (0)1763 208333


What is NATROX®?

NATROX® is a small portable device about the size of a mobile phone. Its function is to produce concentrated oxygen from the surrounding air, and pass this down a thin flexible tube to the ODS.


What is the Oxygen Delivery System (ODS)?

The NATROX® ODS is a unique sterile flexible and comfortable means of applying oxygen directly to the wound surface tissue while allowing the free passage of wound exudate to pass through for absorption and retention in a standard dressing.


How does it work?

Many Clinicians have studied the effects of oxygen and its importance in wound healing. The research shows that without certain levels of oxygen in the tissues, it is very difficult indeed for some types of wounds to heal. The tissues get oxygen from two main sources; firstly from the blood supplied via a network of small blood vessels called capillaries, and secondly, the wound can get some oxygen from the atmosphere. NATROX® works by supplying high concentrations of pure oxygen to the skin and wound bed under the dressing. It only takes a small increase in the amount of oxygen in the wound tissues, for the wound to begin healing again.


How do I know its producing oxygen?

There is no on/off switch on the NATROX® unit; if the battery has enough energy in it, then the green light will flash and it will start producing oxygen as soon as the battery pack is slid into position. A fully charged battery pack should run the NATROX® for at least 24hrs, at which point it must be changed for a fully charged battery pack. Two batteries are supplied with each NATROX®.


Will it work for every wound?

I'm afraid not; there isn't a therapy that will work in every wound, but your Doctor or Nurse will have carefully reviewed your case, to ensure you will benefit from NATROX® therapy. No concerns or problems have occurred in the application of NATROX®, moreover we can find no evidence of harm in any studies carried out. Oxygen is a natural healer.


Why should I wear it 24 hours a day?
Can't I take it off to go to bed?

NATROX® Oxygen therapy works best if you do keep it on 24/7, and it is made as compact and lightweight as possible. The unit makes no noise, and the small flashing green light that shows it is working, should not disturb you at night.

Position the NATROX® therapy unit in the most comfortable position possible, and after a period of adjustment, the device should permit a normal night's sleep.

We know that many people are restless during the night and therefore suggest that the NATROX® unit is placed where you are least likely to sleep on top of it.

How do I connect NATROX® to the ODS?

It is likely that you will not have to position the device and dressing for the first time alone, as it is usual for the Nurse to be in attendance at the start of your therapy. The site of the wound will probably determine where the NATROX® unit is placed, and it is usually held in place on your body using a soft padded Holster, or included in existing bandaging. A thin flexible plastic tube is supplied with the ODS and connects to the NATROX® unit. This tube should be routed in the simplest way possible to keep you comfortable. That may mean feeding it down through your trouser leg for example, so that the tube remains out of sight, and doesn't snag anything whilst you are mobile. For tall people, or other specific routing reasons, then we supply a 1 metre extension tube.

If you do need to disconnect the tube for any reason, this is done with a simple anti clockwise twist where the tube joins the NATROX® unit. When you need to reconnect the tube, a clockwise twist and gentle push will put the tube back on the NATROX® unit.

When considering how to route the tube supplying oxygen to the wound dressing, avoid areas that you may sit on, such as the lower thigh at the back, as we want to avoid any prolonged pressures on the skin which may occur if the tube is pressing into you.


How long will it take my wound to heal?

This depends on many factors related to you as a patient and the type and condition of the wound to start. Your Nurse or Caregiver will usually keep you informed of the progress they see whenever they change a dressing.


Does it have any side effects?

No side effects or risks are known at this current time for NATROX® Oxygen Therapy as the amounts of oxygen we need to enable wound healing are very low. One thing we do ask you to be observant of are any changes in the wound site or condition that your Nurse or Doctor will need to be made aware of. This includes things such as reddened or irritated skin around the dressing that can occur in some patients who prove sensitive to the mild adhesives we use to keep the dressing in place.


Is my wound suitable for NATROX® Oxygen Therapy?

There is a tremendous amount of research going on to define what types of wound respond best, but at present, the main body of clinical opinion seems to focus topical oxygen therapy on three types of “hard to heal wounds”, namely leg ulcers, pressure ulcers, and diabetic foot ulcers. We have good reports in from some Clinicians treating post surgical wounds as well.


What else do I need to be aware of?

As with any wound, it is advisable for the patient to inform the Nurse or Doctor if the wound and surrounding skin changes in an unexpected way. For example, if the wound starts to produce more liquid (exudate) or becomes red and inflamed, bleeds, smells bad, or starts to feel very warm, then it is worthwhile alerting your Caregiving team to these changes. One effect of using oxygen therapy to heal the wound that we have observed is that is some patients, in some types of wound as the wound ‘wakes up’ to healing the body’s healing systems produce more fluid (wound exudates) in the early days of treatment. If you feel or observe this fluid build up beneath the dressing, then it is worthwhile letting your Nurse or Caregiver know, so they can assess the wound and perhaps put on a new dressing if necessary.


Will I feel any pain using NATROX® Oxygen Therapy?

You should not feel any pain using NATROX® Oxygen Therapy, in fact patients have reported significant pain reduction occurring, but this will vary from patient to patient, and wound type to wound type.


Does it hurt during dressing changes?

Safety trials at a major hospital have confirmed there is no trauma associated with ODS removal. It should not hurt during dressing changes if they are changed on a regular basis. It is hard to give specific guidance because of all the many factors that lead to optimal wound healing, but dressing changes will probably be more frequent during the early period of your treatment with NATROX®, than they will be towards the final phases of healing. Your Nurse or Doctor has far more detailed knowledge of your wound, and they will change dressings to suit your particular needs.


Do I need to stop taking any medications I am currently on?

Whilst it is possible that oxygen therapy will make some antibiotics more effective, it is highly unlikely that you will need to stop taking any medications due to using NATROX® therapy. Your Doctor or Nurse will advise you if that is necessary.


How do I charge NATROX® batteries?

Very simply; in the carrying case your NATROX® unit was supplied in, there is a charging unit that plugs into a wall socket. The lead from the charger plugs into the circular hole in the top of the battery unit that becomes visible when the battery is slid out from its’ connection to the NATROX® unit. One battery must always be on charge whilst the second battery supplied is working in the NATROX® unit. Have a set time each day or night to swap them over, so you develop a pattern of charging and using.

  • A battery must always be left on constant charge. Next morning check that the yellow charge light is ON showing a fully charged battery.
  • Remove Blue battery from the charger by holding and pulling the plug and fit this to the OG.
  • Now place Green battery on charge. Continue this routine. A simple chart or diary may help you to remember to change over correctly, for example Monday Green, Tuesday Blue, Wednesday Green, and so on.

What do I do if NATROX® stops working?

NATROX® has no serviceable parts, so if the unit stops working (i.e. no flashing green light on the NATROX® unit), the only thing you can do is to put in a battery pack you know to be fully charged up. If the unit still doesn’t work, then you must return it to Inotec AMD (address below) for replacement / servicing.

Inotec AMD Ltd
Butts Business Centre

Tel: +44 (0)1763 209 007


Isn’t concentrated Oxygen a fire hazard?

It would take far larger amounts of pure oxygen than NATROX® produces to represent a fire hazard in all normal, ventilated situations. There is a concentration of oxygen under the dressing, so we always advise extra caution if there is any possibility that the user is close to naked flames near the direct treatment area.


I have spilt some fluid/substance on the NATROX® unit;
what should I do?

NATROX® is certified to IP22 regarding water ingress, this does not mean it is waterproof. If the unit is still working, just wipe it down with a dry cloth or tissues. Do not use anything on it other than a slightly damp cloth. Please remember this is an electrical device and we don’t want any fluids to get inside as it may stop it from working properly.

If your charger gets wet in any way, and you can access the wall socket without touching the fluid, then switch it off at the wall. Do not use it again until the charger has been checked by a competent person.