Placeholder Image

字幕表 動画を再生する

  • Hello, I'm John Melville from Vernier Software & Technology,

  • and I'm going to be talking to you today

  • about how to use our spirometer.

  • Now, our spirometer is this little device right here,

  • and it's used to measure tidal volumes from the lungs

  • or vital capacity from the lungs.

  • You basically breathe through the device.

  • Now, if you're going to be breathing through a device,

  • there's a couple things that you need to know.

  • You need to keep the device sterile.

  • So we have a little bacterial filter that comes with the kit,

  • and you can buy more of these if you want to,

  • but that has to be attached to the spirometer.

  • And then we also have these disposable mouthpieces

  • that get attached to the bacterial filter.

  • We also have these nose clips,

  • and the reason why you want to use a nose clip

  • is because you don't want the subject or student

  • breathing through their nose;

  • they're supposed to just be breathing through their mouth

  • to look at tidal volumes and lung capacity.

  • Now, there's a couple of key things

  • that you need to know about the spirometer

  • to get good data.

  • One is that the spirometer needs to be zeroed

  • in the position that it's going to be used,

  • and it needs to sit still.

  • So if I'm going to be using the spirometer

  • at about this level, I need to make sure that once

  • I plug it into the LabQuest, I zero it in that position

  • and I don't bend back or forth or move from side to side.

  • So let me just put the spirometer together.

  • Another important thing is that there is

  • a little label on the spirometer that says inlet.

  • This is the side that you want to breathe through.

  • So I'm going to take the bacterial filter

  • and I'm going to attach it to the side that says inlet.

  • Then I'm going to put one of these mouthpieces

  • on the bacterial filter.

  • And then I'm going to... untie this cable...

  • and plug the spirometer into the LabQuest.

  • And what you should see now over at the LabQuest

  • is that there's a flow rate that's being displayed,

  • but there really shouldn't be any flow rate.

  • I'm not breathing through it, nothing's happening.

  • So I need to zero the device

  • to make sure that there's no flow.

  • So I'm going to be using it in about this position.

  • So what I'm going to do next is zero the spirometer.

  • And to zero the spirometer, all that I need to do

  • is just tap on the meter screen.

  • I should just be able to select a zero right there.

  • And now you should see that the flow rate is very close to zero.

  • It's fluctuating between -0.002 and -0.001,

  • which is effectively zero.

  • Now the next thing that I'm going to have to do

  • is put this little nosepiece on my nose

  • and then breathe through the spirometer.

  • But before I do that, let me just tell you a few things.

  • I'm going to just be holding the spirometer like this.

  • I need to make sure that I do not blow

  • through this little mouthpiece.

  • I don't want to use it like a trumpet.

  • I don't want to put the mouthpiece up to my lips

  • and -- [blows] -- blow like that.

  • I want the mouthpiece in my mouth to get accurate data.

  • So what I'm going to do is put this back on the spirometer.

  • I'm going to place this in my mouth,

  • the mouthpiece in my mouth.

  • Put the nosepiece on.

  • And then I'm going to take two normal breaths,

  • and then I'm going to breathe in very deeply

  • and exhale very deep -- and exhale forcefully

  • and then collect another breath.

  • So let's just do that.

  • So I'm going to put this on my nose.

  • Like that.

  • Now I'm going to begin data collection.

  • [exhales forcefully]

  • Let me take this off my nose.

  • And let's look at the volume

  • just by tapping here, going to Volume.

  • So let me just point a few things out

  • using the LabQuest stylus here.

  • You can see that each one of these peaks here,

  • so one, two, three, you can see

  • that the trough of each peak, here and here,

  • don't fall all the way back to zero,

  • just right there and right there.

  • Now, you can adjust that using a baseline adjustment

  • to bring them back to zero.

  • And you do that by doing the following:

  • You go to the Analyze tab.

  • And then go to Advanced, right here.

  • And then you'll see these three things come up,

  • and what you want to select is Baseline Adjustment.

  • And then select Volume.

  • Now you can see right here

  • the adjustment right now is zero,

  • and I can increase it or decrease it.

  • So I'm going to make it negative,

  • and you can see now the baseline rises up.

  • But I don't want to do that;

  • I want to bring it down the other way.

  • A little bit more. There we go.

  • And now you can see that the trough

  • from this peak gets really close to zero,

  • and the trough from this peak falls back to zero.

  • Then you can just select OK.

  • And now that baseline adjustment has been applied

  • to your data here in this graph.

  • All right, so now that I've done the baseline adjustment,

  • let's just calculate some tidal volumes here.

  • So I can select a region here.

  • That's one tidal volume.

  • And let's go to Analyze and go to Statistics.

  • Select Volume.

  • And you can see right here the delta y,

  • that's about 1.131 liters.

  • And let's just turn that off now.

  • And let's pick another tidal volume

  • from here to here.

  • And I can go to Analyze again, Statistics, select Volume.

  • And you can see in that case again,

  • we're at about a delta y of 1.031 liters.

  • So let's turn that off again.

  • And just look at my maximal inhalation and then exhalation.

  • So we can go from this whole region about here to here.

  • Let's go to Analyze again.

  • Statistics, Volume.

  • And the delta y is 5.336 liters.

  • I'll just turn that off again.

  • Now, there is another way to calculate tidal volumes

  • or to look at the difference in an x and a y coordinate

  • if I make a selection, and that's using

  • what we call the delta window.

  • And if I go to Analyze here, I can also go to --

  • if I go to Analyze here, I can also go to Delta.

  • I'm going to select the Graph 1 because Graph 1 is on volume.

  • And now I can highlight a region.

  • I'm just going to drag from the very top of this peak down.

  • Because what I'm really interested in

  • is the height of the peak

  • down to the bottom of the peak.

  • And you can see in this case, the delta y,

  • it's saying, is about 1.294.

  • So a little bit different than what we measured,

  • but it's 1.294 liters in that case.

  • Let's measure this one here.

  • That's 1.216 liters.

  • And then let's look at

  • from the top of this peak to the bottom.

  • Let me just grab that little bit there to there.

  • And that's 5.118 liters.

  • So for more information about our spirometer

  • or other physiology products,

  • visit our website at www.vernier.com.

Hello, I'm John Melville from Vernier Software & Technology,

字幕と単語

動画の操作 ここで「動画」の調整と「字幕」の表示を設定することができます

B1 中級

スパイロメーター - バーニアと技術のヒント (Spirometer - Tech Tips with Vernier)

  • 19 0
    yao に公開 2021 年 01 月 14 日
動画の中の単語