MANUAL PHYSIOLOGY PRACTICAL - Repository:The Medical ...

FM/UOJ
Several added sounds can be heard in diseased lungs. Common sound heard is
crepitation which is crackling or bubbling sound. Another sound is ronchi produced by air
passing through partially obstructed air ways.
Investigation
Many investigations could be done and a common investigation is X – ray
examination
Function tests:
Lung function tests are carried out in patients for physiological diagnosis in the
following circumstances:
1. To give an objective assessment of patient’s disability.
2. To follow the progress of a decease and the effect of treatment.
3 To differentiate the possible causes of dyspnoea.
4. To assess patients before anesthesia especially for thoracic surgery.
Perform the following tests and record the parameters of the class.
a. Maximum Breathing Capacity [MBC]:
Use douglas bag and dry gas meter . After setting up, collect the expired air with
maximum possible dept and rate for 30 seconds. Measure the volume and
calculate liters/minute.
b. Vital Capacity:
Use spirometer as described before.
c. FEV, FEV 1 %-
Use spirometer to measure and calculate as done before.
d. Peak Expiratory Flow Rate:
Use peak expiratory flow meter. Ask the subject to take a deep inspiration and
expel as fast possible through the peak flow meter. Hold the meter horizontally;
bring the rider to zero before each reading. Record three readings and take the
maximum reading.
Respiration
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