![]() An airway obstruction is most likely evident Lung volumes: – FEV 1 – forced expiratory volume – FVC – forced vital capacity – FEV 1/FVC – helps to indicate lung problems l e.g. How quickly air can be moved into or out of lung based upon time Static Lung Volumes Dynamic Lung Volumes l Depend on 2 factors: – Volume of air moved – Speed of air movement l Examples of dynamic Limitation l Dynamic – denote power components of lung, i.e. how much air can be moved into or out of lungs without time Pull ribs back down and in Lung Volumes l Static – denote dimensional components of Muscles pull ribs up and out l Expiration (during exercise) – Internal intercostals and abdominals Inspiratory movements l Pressure gradientīetween air inside and air outside lungs l Expiration (at rest) – Passive process l Diaphram relaxes l Pressureĭifferential (greater inside than out, so air moves out) Mechanics of Ventilation l Inspiration (during exercise) – External intercostals and scaleni To be pulled into lungs due to pressure differential – Degree of filling due to: l Magnitude of Rest) – Diaphragm contracts and moves downward l Causing outside air Some apparatus dead space may actually reduce total dead space, as an ETT bypasses the majority of anatomical dead space of the patient (nasopharynx).ĭead space from the patient.And Exercise The Pulmonary System Major Functions of Pulmonary System l Supply O 2 required in metabolism l Eliminate CO 2 produced in metabolism l Regulate to maintain acid-base balance Mechanics of Ventilation l Inspiration (at Types of Dead Spaceĭead space from equipment, such as tubes ventilator circuitry. Glomerular Filtration and Tubular Functionĭead space is the proportion of minute ventilation which does not participate in gas exchange. Functional Anatomy and Control of Blood Flow
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