11.6.13 kin 272 class notes- Spirometryo Water in the bottomo Large containero Plastic device sitting on topo Will rise/fall depending on if you are inhaling/exhalingo Piece of paper attached to it – similar to ecg graph papero Drum turns at a certain pace- Why is information in the middle?- Balloon example… balloon that is completely fullo Deep inhales are the dipso Deep Exhales are the rising slopes- Tidal volume:o Volume that you take-in in a typical breath- Inspiratory reserve volumeo Starts where typical tidal volume endso Up to 5-6 Lo Depends on body size- ERV – expiratory reserve volumeo Doesn’t go to bottom of grapho Will never totally expire all air out of lungso Similar to sponge, could never totally squeeze all the water outo This is because expiration is passive, can’t contract totally to shove all air out- Residual volumeo Roughly about a Litero Decreases with age- IRV + TV + ERV = FC (functional capacity) (also called vital capacity)o Amount of volume you have the ability to change yourself- Add all the things on graph – TLC (total lung capacity)- FC = TV+IRV+ERV- TLC = TV+IRV+ERV+RV- This graph also does time…o Count the slopes for how many breathso Easier to read than ECG- Respiratory rate: # breaths/minute (ventilation rate?)o About 12o Increases during exercise/stress RV increases- TV= typical breath, volume o 500 ml- Ve = minute ventilationo Volume of air in/out per min- RR * TV = Ve- Ve = minute o RR+TV- Va = alveolar ventilation- Anatomical dead spaceo Air that will never reach an exchange surfaceo =150 ml of any one breath- how much will reach exchange surface for you to exhange gas with?- Take tidal volume (TV) and subtract dead spaceo (TV- dead space) * RR = Va- TV = 500 ml- (500-150) * 12 o 350 * 12 = 4.2 L- V (has dot over it)- Vo2 = oxygen consumption per minute- Vo2max = maximal oxygen consumption per minute during exerciseo Also known as aerobic
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