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And we are now looking at the standard oxygen cylinder. This is the type of cylinder that you would find on ambulances, in a lot of oxygen kits, in hospitals, doctors, all sorts of places have this standard kit. Now the thing with this cylinder is it's not just a cylinder. It's a carbon wrapped cylinder, with an integral regulator built onto the end. So you don't need any separate parts to it. It's just one unit, you just need the mask that goes separate and the oxygen tubing. The main tank at the bottom here, what we have got here is a carbon wrapped steel. 

The advantage of this is much lighter weight and easier to work with, and because the carbon wrapping on it, it's easier, it doesn't get so damaged. It's designed to be laid flat, which is why we have got the flat part of the handle here, that keeps it steady. We would not want it to be held holding up on its end because there's more chance of it falling over and then possibly damaging the area on the end. So this is where the actual oxygen is, and the top part is the regulator. So there are lots of parts to the regulator, and it's in this outside housing to keep it safe. The part in the middle is this collar, and on the collar is key information about the kit, and what you need to do. So it's got the standard warning signs on, to state that they've got compressed gas. And then there's the oxygenising agent sticker.

And the reason we have this label on is because oxygen will cause a problem within a fire. So we have to have these warnings. And these warning signs, you would also have on vehicles or in storerooms as well. Other information around here would be codes of the units, some important information. It says on there that it's odor free, which oxygen would be. There's no smell to it. And it gives you other warnings that if it comes into contact with fire, it can cause a fire as well. Keep cylinder in a well-ventilated place, keep out of reach of children, and also an emergency telephone number. Now, if this oxygen was ever involved in a fire, or somebody wasn't sure, maybe it was leaking or any other problems, there's a number directly on the tank that actually tells you where to phone. In this case, it's the emergency numbers for BOC Gases.

So you take it around, later on, there's barcoding, because a lot of these cylinders can be barcode tracked for stores. And then it would have other information about the purity of it. we have got 99.5% pure medical grade oxygen. Remember, this is medical grade oxygen, not welding oxygen or any other form of oxygen. Within first aid and medical, we must always use medical grade oxygen. And then it will also have on there any other warnings, what the system complies with and the volume. In this particular one here, we are looking at 300 litres of oxygen and the flow rate is between 0 and 15 litres per minute.

Moving up higher on the top end of the cylinder, there is the gauge, which tells you how much oxygen's in the cylinder and it's quite simple. Green means it's full, red means towards where it's empty. And you can watch that as you are using it, when the cylinders laying down, it's quite easy to actually see how much oxygen is in there. This is the main casing around here, and the section here, which is where we would not use because this is how the cylinders are filled up. When this is empty, we would actually just take the entire unit back to BOC, and they will give us a completely new unit. So that's the regulator, we don't take this off, it just is a completely new unit. Coming around a little bit further, we have got the main control knob, and what this would do is it would turn the regulator on. It's not turning the outlet because we got a connection on the top for that. So within this, we just turn it on to start with, which allows the flow of oxygen to come through. Now, don't over tighten and over open these, because as they get changes in temperature, you can find it can jam in one place. As the oxygen's flowing, the units like to cool down and that can cause problems.

The control on the top is where the oxygen's coming out. So you have a barbed outlet on here which is where the push fit oxygen hose goes onto, and on here there's a knob. And we just turn that, and as we turn it, the numbers around the top would change, and they go from 0 to 15 litres a minute. And then you turn it back around to zero to turn it off. Now once you've turned the cylinder off, we have actually got pressure in the system up here. So the oxygen is coming out, and it's pressurised right up to this valve. So what we need to do is go back to the main control unit, control knob, turn that off, and then just come back up to the knob at the top and just turn it and just purge the air out. So you've got that slight hiss, then the systems completely purged. Turn it back off. Now, the valve at the top is switched off, the valve here is turned off. So once this has been used, we then need to store it somewhere different from a full cylinder, so no one's going to pick one of these up by mistake. And we need to get this replenished or replaced by the local supplier as soon as possible.

Now, finally, each of these cylinders will have a sticker on which shows the batch number, where it's filled, and also the expiry date. Now, this particular one here is one we use for training, so it's actually an expired unit because we are using it within the training sector without actually using it on a patient. So it's always worth keeping a check on that, and also remember as with new oxygen, if you've got more than one cylinder and you've got quite a lot of them, always make sure you rotate it so that you are using the oldest ones first. So that as new ones come in, they're put towards the back and you are taking the others out, to make sure you don't have oxygen that you are using for patients that have passed its expiry date.