Tag: Respiration measurement
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Types of Spirometers & Technologies used
Spirometer is the instrument used to measure lung capacity and volume. The record obtained from spirometer is called a spirogram. There are a number of spirometers used in respiration volume measurements. In this article, we look at general types of spirometers according to their application and some of the technologies utilized in these spirometers. There…
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How Partial Pressure of Oxygen and Carbon dioxide in the Blood is Measured
The measurement of partial pressure of oxygen and carbon dioxide in the blood is one of the key physiological chemical measurements. The partial pressure of a dissolved gas is defined as the contribution of this dissolved gas to the total pressure of all dissolved gases in the blood. Hence, the partial pressure of a gas…
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The Function of Impedance Pneumograph In Respiration Measurements
Impedance pneumography is an indirect method for the measurement of respiration. This measurement is performed by the impedance pneumograph which measures the respiratory volume and rate through the relationship between respiratory depth and thoracic impedance change. Impedance pneumography avoids burdening the subject with spirometers, tubes, and flowmeters; does not hinder respiration and has minimal effect…
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Key Considerations in Respiratory Measurements & Instrumentation Involved
Airflow The airflow in the respiratory system is normally laminar. However, during heavy breathing or when there is an obstruction, the airflow may become turbulent. The airflow is laminar unless the Reynolds number of the flow becomes 50,000 or more. When the Reynolds number is small, the viscous force in the flow dominates over the…