What are Gas Distribution Tests? (Lung Volumes and Airway Resistance)
What are Gas Distribution Tests? Watch this quick video to learn about lung volumes and airway resistance.
💥Gas Distribution Tests [Full Guide] ➜ ➜ ➜ https://bit.ly/35RNnif
🟦 What is a Lung Volume?
A lung volume refers to the amount of air within the lungs during a specific phase of the breathing cycle.
➡️ The four lung volumes are:
1. Tidal Volume (VT)
2. Inspiratory Reserve Volume (IRV)
3. Expiratory Reserve Volume (ERV)
4. Residual Volume (RV)
🟦 What is a Lung Capacity?
A lung capacity refers to the amount of air within the lungs during a specific phase of the breathing cycle and is a combination of two or more lung volumes.
➡️ The four lung capacities are:
1. Vital Capacity (VC)
2. Inspiratory Capacity (IC)
3. Functional Residual Capacity (FRC)
4. Total Lung Capacity (TLC)
For example, if you were to combine each of the four lung volumes, this would give you the Total Lung Capacity.
🟦 What is Airway Resistance?
Airway Resistance (Raw) is the measurement of the opposition to airflow that occurs as air moves through the airways of the lungs. Airway Resistance (Raw) can be calculated with the following formula:
➡️ Raw = (PIP – Plateau pressure) / Flow
So essentially, it takes the pressures within the lungs and the airflow to determine how much resistance there is in the airways of the lungs.
🟦 What are Gas Distribution Tests?
Gas Distribution Tests are used to obtain a measurement of the absolute lung volumes during a breathing cycle.
➡️ The three primary types are:
1. Helium Dilution
2. Nitrogen Washout
3. Body Plethysmograph
For the sake of keeping this video short, we're going to dive deeper into each of these tests in separate videos. However, one important thing to remember is that they can all be used to measure a patient's residual volume. Residual Volume (RV) is the volume of air remaining in the lungs after a complete exhalation. Since the residual volume cannot be exhaled, this makes it difficult to measure which is exactly why these gas distribution tests are important. Again, this video was designed simply to provide you with a quick overview of this topic. We'll be breaking it down into much more detail in future videos.
💥Gas Distribution Tests [Full Guide] ➜ ➜ ➜ https://bit.ly/35RNnif
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🚑MEDICAL DISCLAIMER
This content is for educational and informational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Please consult with a physician with any questions that you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you watch in this video. We strive for 100% accuracy, but errors may occur, and medications, protocols, and treatment methods may change over time.
💡AFFILIATE DISCLAIMER
This description contains affiliate links. If you decide to purchase a product through one of them, we receive a small commission at no cost to you.
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⏰TIMESTAMPS
0:00 - Intro
0:27 - What is a Lung Volume?
0:37 - Four Lung Volumes
0:45 - What is a Lung Capacity
1:00 - Four Lung Capacities
1:22 - What is Airway Resistance?
1:34 - Raw = (PIP – Plateau pressure) / Flow
1:54 - What are Gas Distribution Tests?
2:05 - Three Primary Types
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🖼CREDIT FOR MUSIC AND GRAPHICS:
▪ Music licensed from Audiojungle.net/
▪ Graphics: Canva.com, Freevector.com, Vecteezy.com, and Pngtree.com
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