slim tube

I ordered some filters from my online supplier here in Canada. They sent a free gift along with it as a promotional thing. It is 6' Slim Tube hose. I have an older machine PR System One Bipap so I have always used the original hoses with it. The Slim Tube fits - if I use the quick connects, which I have always used anyway.

I didn't need a hose but this freebee came with my filters. Should I use it on my machine since it does fit with the quick connects? Is there any harm to the machine and will it make any difference to my therapy? Anyone know?
Thanks.

Hawthorne wrote:I ordered some filters from my online supplier here in Canada. They sent a free gift along with it as a promotional thing. It is 6' Slim Tube hose. I have an older machine PR System One Bipap so I have always used the original hoses with it. The Slim Tube fits - if I use the quick connects, which I have always used anyway.

I didn't need a hose but this freebee came with my filters. Should I use it on my machine since it does fit with the quick connects? Is there any harm to the machine and will it make any difference to my therapy? Anyone know?
Thanks.

you need to set the tubing type setting, the 60 series has a 'tubing type' setting, for 22, or 15 mm tubing, hopefully yours does too. without setting the proper tubing size, using smaller diameter tubing will affect the accuracy of the delivered pressure.

I have the 50 series machine. Is Slim tube a "no go" with this one? I don't think there is a way to set the tubing size on the 50 series - or is there?

The Tube setting is there but is locked and says 22.

I don't really know what the setting does to the machine function. I have a 60 series and have recently installed a heated tube. The tube size was not selectable before doing this, it just assumed 22 mm hose unless it detected the heated hose kit, so it was locked out on that machine as well.

If you have a slim tube, give it a try. It's not like 15mm is restrictive or anything at CPAP pressures, there is just less volume of air in the hose between the user and machine than the thicker hose. People put on longer hoses all the time and don't make changes to the settings. Try it, and let us know what you find out. My best guess is it makes no difference to the machine, and this is a heated hose thing to reduce the volume and surface area that needs to be kept heated, reduce costs and it's slightly more flexible and comfortable.

Hawthorne wrote:I have the 50 series machine. Is Slim tube a "no go" with this one? I don't think there is a way to set the tubing size on the 50 series - or is there?

The Tube setting is there but is locked and says 22.

if it's locked, you have to go into the clinical setting and unlock it.

if there's a setting, you should be able to set it to 15.

Sleeprider wrote: It's not like 15mm is restrictive or anything at CPAP pressures, there is just less volume of air in the hose between the user and machine than the thicker hose.

resmed and respironics, and possibly others, disagree with you.

as do the laws of fluid dynamics.

the pressure response, especially in a bilevel situation, will be suffer.

for fun, try putting a 22mm hose on a machine set for 15 and see if you don't feel a difference in the pressure.

palerider wrote:

Hawthorne wrote:I have the 50 series machine. Is Slim tube a "no go" with this one? I don't think there is a way to set the tubing size on the 50 series - or is there?

The Tube setting is there but is locked and says 22.

if it's locked, you have to go into the clinical setting and unlock it.

if there's a setting, you should be able to set it to 15.

What I'm telling you is that it is locked in the clinical settings. There is not a way to change it. The setting has to do with the heated hose. It may or may not affect pressures at the mask. I think the machine senses pressure within the fan cabinet, not in the tubing, so pressure delivery should not be affected much, if at all. I'm not a physicist so I'm not going to play fluid dynamics with you. I'm sure there is an increase in velocity through the tube at the same pressure, however I think pressure and flow remain a constants.

On the 60 series the heated hose, when connected, locks in at 15mm. But an unheated hose has the option for the 15 or 22mm. So, if unheated and available on the 50, they should be able in the clinical menu to have a choice. From what I can see is that it is not compatible with 150 or 250 but other System one models should work.

I did find how to change the hose setting from 22 to 15. I will try it sometime to see if there is any difference. Think I'll try it for a nap first instead of all night.

OkyDoky wrote:On the 60 series the heated hose, when connected, locks in at 15mm. But an unheated hose has the option for the 15 or 22mm. So, if unheated and available on the 50, they should be able in the clinical menu to have a choice. From what I can see is that it is not compatible with 150 or 250 but other System one models should work.

seee? some people are able to easily comprehend the simple truths! *hugs*

Sleeprider wrote:What I'm telling you is that it is locked in the clinical settings. There is not a way to change it. The setting has to do with the heated hose. It may or may not affect pressures at the mask. I think the machine senses pressure within the fan cabinet, not in the tubing, so pressure delivery should not be affected much, if at all. I'm not a physicist so I'm not going to play fluid dynamics with you. I'm sure there is an increase in velocity through the tube at the same pressure, however I think pressure and flow remain a constants.

what I'm telling you is that you are wrong, in pretty much every single way.

1. the setting has nothing to do with the heated hose.
2. attaching a heated hose automatically selects the correct setting, disconnect the heated hose and poof, you can change it!
3. respironics only has a small heated tube, so it's locked at 15mm, resmed has a large and small one, and connecting them sets the hose size appropriately, not because it's heated, but simply because the machine can tell what size it is, and doesn't have to ask, unlike a plain hose..
4. smaller hoses create greater resistance to flow, thus affecting the pressure curves delivered. see below
5. I liked your "I dunno fisikz, so you're wrong!" comment.
6. even the mask SIZE affects the delivered pressure curves, hence the resistance setting on the 60 series (catching up to resmed) see below

Hawthorne wrote:I did find how to change the hose setting from 22 to 15. I will try it sometime to see if there is any difference. Think I'll try it for a nap first instead of all night.

the important thing (regardless of what some people dat don't know no better think) is to just make sure the hose *setting* matches the actual hose used

easy peasy.