NSG 4330 Lecture 5: Complex Care Class 5 Notes ABG
11 Nov 2020
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Hypoxia: under oxygenation of organs, tissues and cells impairing normal metabolism. Hypoxemia: low blood o2 as measures by arterial and/or venous oxygenation. Abg: ph: acidosis 7. 35 7. 45 alkalosis (absolute norm is 7. 40) the higher the ph, the lower the h+ concentration (as h+ is acidic). 3 compensatory mechanisms: chemical buffer system: immediate buffer. 1st line of defense. respiratory system: kicks in within minutes. Breathing speeds up or slows down to regulate ph. Hyperventilation leads to too much co2 lost. renal system regulation: metabolic system that takes hours-days; bicarbonate retained or excreted. Kidneys can reabsorb and conserve bicarb (hco3- - alkalotic) Hco3-: acidosis 22-26 alkalosis; metabolic: 80-100 normal, 60-79 mild hypoxemia, 40-59 moderate hypoxemia, <40 severe hypoxemia. Ards and respiratory distress: o2 supply problem when choking, during asthma, anemia. Acute respiratory failure: not a disease but a condition. Result of one or more diseases involving the lungs or other body systems.
