How is the spirometer used to measure lung volume?!
Question: How is the spirometer used to measure lung volume!?
Answers:
A spirometer is an apparatus for measuring the volume of air inspired and expired by the lungs!. It is a precision differential pressure transducer for the measurements of respiration flow rates!. The spirometer records the amount of air and the rate of air that is breathed in and out over a specified time!. The Spirometer and attached flow head function together as a pneumotachometer, with an output signal proportional to airflow!.Www@Answer-Health@Com
The spirometer is used in a less sophisticated manner to measure flow and volume!. Generally speaking !.!.!.!. flow has to do with obstruction (air flow) and volume has to do with restriction (lung tissue expansion)!.
The main test is called a flow-volume loop!. The patient is asked to take a deep breath and fill their lungs completely and exhale as forcefully as they can and empty their lungs completely!.
This provides a graphic analysis of flow and volume!. The volume is measured on one axis !.!.!. flow on the other!. Based on your age, height, and race !.!.!. there are predicted values for the results!. One parameter is vital capacity (lung volume)!. This can be reduced due to loss of lung tissue !.!.!. such as scarring of the lung !.!.!. or incomplete emptying of the lung due airway obstruction (emphysema) !.!.!. another parameter is FEV1 (forced expiratory volume at 1 second) !.!.!. this measures flow through the large and medium airways !.!.!. this is a good indicator of obstruction !.!.!.!. generally from edema or spasm of the airways !.!.!.
There are a few parameters that are derived from this test that are very helpful in diagnosing or classifying pulmonary disorder
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The main test is called a flow-volume loop!. The patient is asked to take a deep breath and fill their lungs completely and exhale as forcefully as they can and empty their lungs completely!.
This provides a graphic analysis of flow and volume!. The volume is measured on one axis !.!.!. flow on the other!. Based on your age, height, and race !.!.!. there are predicted values for the results!. One parameter is vital capacity (lung volume)!. This can be reduced due to loss of lung tissue !.!.!. such as scarring of the lung !.!.!. or incomplete emptying of the lung due airway obstruction (emphysema) !.!.!. another parameter is FEV1 (forced expiratory volume at 1 second) !.!.!. this measures flow through the large and medium airways !.!.!. this is a good indicator of obstruction !.!.!.!. generally from edema or spasm of the airways !.!.!.
There are a few parameters that are derived from this test that are very helpful in diagnosing or classifying pulmonary disorder
You can post me if u have any questionsWww@Answer-Health@Com
Lung vol!. can be done three different ways!.With body plethsmography, helium dilution, and nitrogen washout!.
During a body plethsmography, the patient sits in an airtight box, inhales or exhales a particular volume, and then a shutter closes off the breathing tube!. The patient is then directed to breathe against the shutter's resistance, causing the chest volume to expand and decompress the air in the lungs!. This increase in chest volume reduces the box volume and slightly increases the pressure in the box!.Calculations are made on the amount displaced from the box!.
Helium dilution technique is a closed-circuit system where a spirometer is filled with a mixture of Helium and Oxygen!. The amount of He in the spirometer is known at the beginning of the test !. The patient is then asked to breath in the mixture starting from FRC (Functional Residual Capacity), also known as end expiration!. Because there is no leak of substances in the system, the amount of He remains constant during the test, and the final concentration of He in the spirometer is measured!.
Nitrogen washout, In this technique, 100% oxygen in inhaled briefly and nitrogen in the exhaled gas is measured - this allows calculation of the total amount of gas in the lung originally!.Www@Answer-Health@Com
During a body plethsmography, the patient sits in an airtight box, inhales or exhales a particular volume, and then a shutter closes off the breathing tube!. The patient is then directed to breathe against the shutter's resistance, causing the chest volume to expand and decompress the air in the lungs!. This increase in chest volume reduces the box volume and slightly increases the pressure in the box!.Calculations are made on the amount displaced from the box!.
Helium dilution technique is a closed-circuit system where a spirometer is filled with a mixture of Helium and Oxygen!. The amount of He in the spirometer is known at the beginning of the test !. The patient is then asked to breath in the mixture starting from FRC (Functional Residual Capacity), also known as end expiration!. Because there is no leak of substances in the system, the amount of He remains constant during the test, and the final concentration of He in the spirometer is measured!.
Nitrogen washout, In this technique, 100% oxygen in inhaled briefly and nitrogen in the exhaled gas is measured - this allows calculation of the total amount of gas in the lung originally!.Www@Answer-Health@Com
put the tube end in ur mouth and slowly inhale causing the ball to raise!.Www@Answer-Health@Com