How does one determine the normal leak rate for a given mask and pressure?
I'm having a leak rate of around 40 and have no idea if this is normal or bad.
-james
Normal Leak Rate
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Re: Normal Leak Rate
Your FlexiFit (in fact all masks) should have come with a pamphlet that has a chart with "Bias Flow Information". This is the leak rate in L/M at various pressures. If my leak rate stays below 40 L/M I'm happy.jskinner wrote:How does one determine the normal leak rate for a given mask and pressure?
I'm having a leak rate of around 40 and have no idea if this is normal or bad.
-james
Bob
........."Your FlexiFit (in fact all masks) should have come with a pamphlet that has a chart with "Bias Flow Information". This is the leak rate in L/M at various pressures. If my leak rate stays below 40 L/M I'm happy."
Thank you. Bob. It seems that every day I read these threads, I learn something new or get some valuable suggestion that would never have occurred to me.
No wonder my treatment trudged along at such a slow pace before.....I didn't have the patient experience/expertise to guide me I've now found on cpaptalk.com.
Thank you. Bob. It seems that every day I read these threads, I learn something new or get some valuable suggestion that would never have occurred to me.
No wonder my treatment trudged along at such a slow pace before.....I didn't have the patient experience/expertise to guide me I've now found on cpaptalk.com.
......The information provided in this post is not intended nor recommended as a substitute for professional medical advice......
You can find the table here: http://www.fphealthcare.com/osa/pdf/HC407/185043202.pdf
Looks to me that, at a 6 pressure, the built-in leak rate is 27-28. Any over that is a "real" leak.
Looks to me that, at a 6 pressure, the built-in leak rate is 27-28. Any over that is a "real" leak.
_________________
| Machine: AirSense 11 Autoset |
| Mask: DreamWear Nasal CPAP Mask with Headgear |
| Additional Comments: Oscar software Previous Masks: Airfit P10 Nasal Pillow, Swift FX Nasal Pillow, Comfort Curve, Opus, Mirage Swift II |
you need to get out the datasheet that came with your mask.
Look at the graph on that datasheet, find your CPAP pressure (cm), then find the intentional leak/flow rate at that pressure (i.e. 38L/m).
If your mask has a intentional leak rate of 38L/m and your machine says leak rate is 40L/m then it is:
Machine reporting leak=40L/m
- Mask intentional leak=38L/m
-----------------------------------
Actual leak rate: 2L/m This is the leak rate between the mask cushion and your face (or humidifier tank coupler, mouth breathing etc.).
All mask should have a flow rate "datasheet" included in the package when you purchased the mask.
What is an acceptable leak rate? Depends on your machine, for the Remstars if you keep things below 50 L/m the machine won't complain much nor will it impact therapy. Leak depends on the size of the leak and the duration.
Look at the graph on that datasheet, find your CPAP pressure (cm), then find the intentional leak/flow rate at that pressure (i.e. 38L/m).
If your mask has a intentional leak rate of 38L/m and your machine says leak rate is 40L/m then it is:
Machine reporting leak=40L/m
- Mask intentional leak=38L/m
-----------------------------------
Actual leak rate: 2L/m This is the leak rate between the mask cushion and your face (or humidifier tank coupler, mouth breathing etc.).
All mask should have a flow rate "datasheet" included in the package when you purchased the mask.
What is an acceptable leak rate? Depends on your machine, for the Remstars if you keep things below 50 L/m the machine won't complain much nor will it impact therapy. Leak depends on the size of the leak and the duration.
5 posts
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