MANUAL PHYSIOLOGY PRACTICAL - Repository:The Medical ...

FM/UOJ
Changes in breath holding time
Method:
Analyze the alveolar gas concentrations after each of the following procedures.
Ask the subject to hold breath as long as possible after repeating each of the following
procedures and when the breaking points are reached to expel the air in the lungs through
the tube to analyze the alveolar gas again. This is to obtain the gas concentrations at the
beginning and at the end of the breath holding period. The subject should signal at the
start and end of the breath holding in order to start and stop the stopwatch.
a. Breathing pure oxygen for one minute (end of deep inspiration).
Breath holding time:……………………………………….
Alveolar Oxygen:…………………………………………
Alveolar Carbon Dioxide:…………………………...............
b. Normal inspiration.
Breath holding time:……………………………………….
Alveolar Oxygen:…………………………………………
Alveolar Carbon Dioxide:…………………………...............
c. Deep inspiration.
Breath holding time:……………………………………….
Alveolar Oxygen:…………………………………………
Alveolar Carbon Dioxide:…………………………...............
d. Hyperventilation as long as possible.
Breath holding time:……………………………………….
Alveolar Oxygen:…………………………………………
Alveolar Carbon Dioxide:…………………………...............
Exercise:
Correlate the breath holding time with alveolar gas concentration and explain the
inferences.
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Respiration
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