DATA Table 1 Holding Breath Rapid Breathing Before Challenge Tidal volume (L) Re
ID: 3524646 • Letter: D
Question
DATA Table 1 Holding Breath Rapid Breathing Before Challenge Tidal volume (L) Respiratory rate (breaths/min)1.1 Initial minute ventilation (L/min) Co.b(1.5 3?'8 After Challenge Tidal volume (L) Respiratory rate (breaths/min) Minute ventilation (U/min) 2-? 5.6 Table 2-Exercise Before Challenge Tidal volume (L) Respiratory rate (breaths/min) Minute ventilation (L/min) O Iu5 During Challenge Tidal volume (L) Respiratory rate (breaths/min) Minute ventilation (L/min) 1 After Challenge 03 Tidal volume (L) Respiratory rate (breaths/min) Minute ventilation (L/min) u. 51Explanation / Answer
1. Breath holding - During breath holding the respiratory rate, tidal volume and minute ventilation all of these decreased. The CO2 levels increased in the blood and this increase in CO2 levels have increased the respiratory drive.
Rapid breathing - During rapid breathing the tidal volume decreased but the respiratory rate increased. There is also an increase in minute ventilation. Co2 levels in the blood decreased thereby decreasing the respiratory drive.
Exercise - The respiratory rate, tidal volume nad minute ventilation all of them increased. The production of CO2 increased during exercise and this leads to increase in respiratory drive.
2.
The greatest change in respiratory rate was caused during Pre-challenge because of rapid breathing. The greatest change in tidal volume was caused during Breath holding. The greatest change in minute ventilation was during Rapid breathing.
If we compare with the resting value then Tidal volume changed the most.
3. When we are anxious and hyperventilating then we tend to blow out more air which means we blow out more CO2 than normal. This leads to a decrease in pH of the blood. When we breathe into a paper bag then the CO2 level increases in the bag which enters ou body and increases the level of CO2 in our body and brings the pH back to normal.
4. If we give these patients suffering from emphysema high levels of O2 then this will help to ventilate the CO2 out of the body and maintain a proper balance of O2 and CO2. Therefore the flow of O2 will be better and the patient won't have an oxygen dependent respiratory drive.
5. Breathing of pure O2 won't help air hunger suffered by athletes because this air hunger is due to the build up of lactica cid in the muscles and Acidosis. So, breathing normal air or even pure O2 won't help.
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