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Obstructive vs Restrictive Lung Disease | Pulmonary Function Test🫁
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▬▬▬▬▬▬▬▬▬▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬
00:00:00 Introduction
00:00:30 Normal Lung Structure
00:02:36 Restrictive Lung Diseases
00:08:29 What Are Obstructive Lung Diseases?
00:09:31 Chronic Bronchitis
00:12:03 Emphysema
00:19:17 Asthma
00:19:52 Chronic Obstructive Pulmonary Diseases
00:21:25 Compliance Graph
00:24:09 Hallmarks Of Chronic Obstructive Diseases
00:30:57 Spirometry Findings Of Volumes And Capacities In Normal Lung
00:32:56 Spirometry Findings Of Volumes And Capacities In Restrictive Lung Diseases
00:36:37 Spirometry Findings Of Volumes And Capacities In Obstructive Lung Disease
00:41:25 Comparison Of Spirometry Findings Of Obstructive And Restrictive Lung Diseases
00:43:54 Expiratory Rate Flow Measured With Time In Normal Lung
00:50:20 Expiratory Rate Flow Measured With Time In Restrictive Lung Disease
00;54:45 Expiratory Rate Flow Measured With Time In Obstructive Lung Disease
00:58:25 Spirometry Findings Of Expiratory Rate Flow With Time In Normal Lung
01:02:18 Spirometry Findings Of Expiratory Rate Flow With Time In Restrictive Lung Diseases
01:06:45 Spirometry Findings Of Expiratory Rate Flow With Time In Obstructive Lung Diseases
01:08:19 Flow Volume Loop In Normal Lung
01:13:57 Flow Volume Loop In Tracheal Obstruction
01:15:11 Flow Volume Loop In Restrictive Lung Disease
01:20:15 Flow Volume Loops In Obstructive Lung Disease
01:24:23 Rapid Review Of Lecture
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Lung diseases can be classified as either restrictive or obstructive. Restrictive lung diseases cause a decrease in lung volume. Obstructive lung diseases trap air in the lungs and therefore increase lung volume. FEV1 is the forced expiratory volume in one second or the volume of air that can forcibly be blown out in one second, after full inspiration. FVC is the forced vital capacity or the volume of air that can forcibly be blown out after full inspiration and expiration. Both these values can be measured by spirometry. The ratio between the FEV1 and FVC can help distinguish between restrictive and obstructive lung diseases.Restrictive lung diseases can be caused by either poor breathing mechanics (a result of conditions like myasthenia gravis, obesity, and scoliosis) or can result from interstitial lung disease such as pneumoconioses or ARDS. Lung volume decreases in restrictive lung disease and the FEV1/FVC ratio is normal to increased (ie. greater than 80%) due to a significant decrease in forced vital capacity (FVC). Obstructive lung disease is characterized by airway obstruction and it is associated with inflammation of the airways and problems exhaling. Types of obstructive lung disease include asthma, bronchiectasis and COPD (chronic bronchitis and/or emphysema). Obstructive lung disease results in air trapping in the lungs which expands the lung volume over time. A decrease in the FEV1/FVC ratio suggests an obstructive condition.
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