KIN 105 Lecture Notes - Lecture 5: Partial Pressure, Pulse Oximetry, Hematocrit
23 Jan 2018
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Lecture 5 fick equation and determinant of vo2. Vo2 = hr x sv x (cao2 cvo2) Ca = arterial o2 content is determined by ventilation, respiration, hemoglobin (hb) concentration and hb saturation. Cv = dependent on metabolic rate of the tissues and blood flow of tissue. Diaphragm is the primary respiratory muscle in inspiration and expiration. During exercise, muscles are recruited to enhance expiration. Mechanics- changes in volume and pressure drive ventilation. 740 mmhg atmospheric pressure in kw > 737 mmhg intrapulmonary pressure. 740 mmhg atmospheric pressure in kw < 743 mmhg intrapulmonary pressure. (cid:704) air flows out of the lungs. Note: do not need a huge pressure gradient, really only need 4 mmhg difference. Conducting zone serve to conduct, clean, warm and moisten the air. This portion is composed of the nose, pharynx, larynx, trachea, bronchi, and bronchioles. Trachea and bronchi are rigid tubes: cartilage for protection since it is exposed as well as keeping it open.
