tidal volume

Can somebody explain or point me to what this means. Since I had the extra sizes of pillows for my swift FX I decided maybe a change in size would help the leak rate. When the sized me the med was the one they put on and said it fit fine. Any way I tried the large and it was clear leaks were going to be worse so I tried the small and it seemed okay. Slept with it on and the leak rate was a little lower then normal but not lower then some nights with the med pillow. But the tidal volume was higher. In the 95% col it was more the 100 higher then any night with my normal size and the max was over 400 then any other night. Just wondering what tidal is and would the change in size do this.

https://en.wikipedia.org/wiki/Tidal_volume

https://www.youtube.com/watch?v=TrGQAuBAuJs

95% numbers ....remember the defintion....at OR BELOW for 95% of the night. It is NOT where you were at for 95% of the night.
There is a very wide range in "normals" for tidal volume and it's going to vary widely within the normals.
I can't see a different size of nasal pillow doing anything with tidal volume. Most likely you are just seeing normal variations.

from my limited science background ..
smaller opening means less volume at the same pressure
less volume means longer inspire and expire time to get the same volume
there for lower breath rate .... there for you need to increase the volume to keep the o2 level up

Or as pugsy says normal variation

Well it was 2 weeks ago yesterday I got this new machine and every day except last night my tidal volume was within 20 in the 95% and less then 100 different in the max. But last night the 95% was up 100 and the max was up 400 so it seems like it made that happen. I can understand what tidal volume is my lung capacity I'm just not sure how well this records it. I'm thinking it is an average over the night. It could be the smaller opening makes a difference but I would not think that much. Most nights my ears will pop as it gets to pressure but I didn't notice it last night. And I don't notice it every night so I can't say that changed. Just trying to understand it all so I don't know if I say something if it makes since to somebody who understands these readings and the things that cause changes

bmanley wrote:I'm thinking it is an average over the night.

I repeat....95% numbers are NOT an average over the night. You are dead wrong in your thinking there.

If you want an overall average go change SH from median average to "normal average"
Preferences/CPAP tab
Right lower corner....change "median" average to "normal average" and then look at the 2 column in the statistics for you overall average.

bmanley wrote: But last night the 95% was up 100 and the max was up 400 so it seems like it made that happen. I can understand what tidal volume is my lung capacity I'm just not sure how well this records it. I'm thinking it is an average over the night.

didn't I paste the link to robysue's explanation? are you unable to comprehend it? are you so obsessed with all these new numbers that you're unable to think?

tidal volume is NOT your lung's capacity, it's how much you breath in and out each breath. shallow breath, deep breath, different tidal volume, same "lung capacity".

palerider wrote:tidal volume is NOT your lung's capacity, it's how much you breath in and out each breath. shallow breath, deep breath, different tidal volume, same "lung capacity".

Can/Will your tidal volume numbers be influenced by your lung capacity? If your lung capacity is in fact compromised in some way, would that affect your inspiration/expiration volumes? Due to all the medical stress/hubby medical stress I've experienced this year I've unfortunately reverted back to smoking. And at my most recent pre-op physical, the doctor said that I have beginning emphysema.

Someone in a previous forum post mentioned that "average" tidal volume for an adult is in the 500 range. So I looked at my numbers for the first time and saw that, over 3 months, average minimum is 100, and overall average is 300. Now that may be "MY" average, (female/old/short) so not to worry too much.....yet? Could/would those numbers give me a clue as to how bad off I already am?

Prior to my hip pain I danced about 3 hours/day. My bad knee gave out faster than my breath. Yesterday I went to my first dance class after hip replacement surgery...hip FINE, knee hurt as usual afterwards (I don't feel the pain while dancing!)...but yeah...breathless.

I know I'm in denial. I know the solution. STOP SMOKING! I do have a slew of vaping supplies (no nicotine juice)...but hey, when this stress ever stops, I'll gladly stop grabbing that pack of evil smokes.

DanceDiva26 wrote:

palerider wrote:tidal volume is NOT your lung's capacity, it's how much you breath in and out each breath. shallow breath, deep breath, different tidal volume, same "lung capacity".

Can/Will your tidal volume numbers be influenced by your lung capacity? If your lung capacity is in fact compromised in some way, would that affect your inspiration/expiration volumes? Due to all the medical stress/hubby medical stress I've experienced this year I've unfortunately reverted back to smoking. And at my most recent pre-op physical, the doctor said that I have beginning emphysema.

Someone in a previous forum post mentioned that "average" tidal volume for an adult is in the 500 range. So I looked at my numbers for the first time and saw that, over 3 months, average minimum is 100, and overall average is 300. Now that may be "MY" average, (female/old/short) so not to worry too much.....yet? Could/would those numbers give me a clue as to how bad off I already am?

Prior to my hip pain I danced about 3 hours/day. My bad knee gave out faster than my breath. Yesterday I went to my first dance class after hip replacement surgery...hip FINE, knee hurt as usual afterwards (I don't feel the pain while dancing!)...but yeah...breathless.

I know I'm in denial. I know the solution. STOP SMOKING! I do have a slew of vaping supplies (no nicotine juice)...but hey, when this stress ever stops, I'll gladly stop grabbing that pack of evil smokes.

if your lungs aren't working as well as they should, then your lung capacity will be compromised, and your tidal volume MAY change... again, tidal volume is just however much you're inhaling and exhaling... take a few shallow breaths, small tidal volume, now inhale as much as you can, and force it all out.. much more tidal volume. it's like the tide, however much that goes in and out, that's all it is.

taller people will have more, shorter people less, men more, women less... "average" doesn't mean much. comparing your current data to earlier data might be more meaningful.

DanceDiva26 wrote:
Someone in a previous forum post mentioned that "average" tidal volume for an adult is in the 500 range. So I looked at my numbers for the first time and saw that, over 3 months, average minimum is 100, and overall average is 300. Now that may be "MY" average, (female/old/short) so not to worry too much.....yet? Could/would those numbers give me a clue as to how bad off I already am?

I'm just shy of 5ft tall, weigh around 108 pounds, am 53 years old, have no lung issues, and my average tidal volume is around 330. I think the low 300s is probably normal for us short gals.

palerider wrote:taller people will have more, shorter people less, men more, women less... "average" doesn't mean much. comparing your current data to earlier data might be more meaningful.

Thanks PaleRider! Yes, I knew that the volume differed with each inhalation/exhalation...it was the 500 "average" that started me thinking/worrying. And you're right about comparison to earlier data...I'll keep tabs on it to see if there are any changes when I stop smoking. But hey...stats or no stats, the best empirical proof was the danged "breathlessness" yesterday.

Arlene1963 wrote:I think the low 300s is probably normal for us short gals.

And thanks for chiming in, Arlene! It's good to hear that 200 below the "average" can be average for some people. I also tend to forget that I had sepsis in June plus 3 major surgeries in the last 10 months...my whole body, muscles, joints AND lungs probably got lazy. I guess I'm lucky that I even stayed upright during the class!

::::Breaking out all the vape gear::::::::