Assignment: Estimate your personal forced vital capacity (FVC) from prediction e

Question

Assignment: Estimate your personal forced vital capacity (FVC) from prediction equations and experimental techniques

1) First, predict pulmonary function (FVC) from a normal FVC calculation using the following material:

Age:22, Height: 5'4, Weight: 117lbs

2) Create a homemade spirometer- create your own method to measure FVC using a plastic bag and a bucket of water. Write a detailed descripted of how you carried out the experiment. Do NOT use a soda bottle and tubing to create this spirometer--use a plastic bag and bucket of water. Consider displacement when designing your experiment.

*Please help me with both step 1 and 2 of this experiment.

Explanation / Answer

1. Forced vital capacity or FVC is the amount of air which can be exhaled forcibly after taking a deep breath. Spirometry, a type of pulmonary function test is used to measure FVC. In this test a mask is placed over the face and measurements are taken while breathing in and breathing out as forcibly as possible. A chart is generated which is a plot of volume and air during one inhalation and one exhalation.

FVC is measured for various reasons as mentioned below:-

                  As given a person of age – 22, Height- 5’4 and Weight – 117 lbs:- determine the FVC

The formula to calculate Vital capacity of lungs is

In females,

vc = (21.78 – 0.101a) * h

where a is age in years and h is height in cm and vc is approximate vital capacity in cm3.

vc = 3129.6 cm3

In males,

vc = (21.63 – 0.112a) * h

= 3067.2 cm3

2. A homemade spirometer can be made by using a plastic bag and a bucket of water. The other requirements are as under:-

The experiment with all the apparatus mentioned can be done as under:-

To calculate the vital capacity,

Multiply the number of marks with 250 and then divide by 1000.

For example if the total marks filled with air is 10 then

the vital capacity of lung will be 10 * 250 / 1000 = 2500/1000 = 2.5 litres.

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