*NURSING > COURSE NOTES > NURS 4581 Critical Care - Exam 1 Notes, University of Texas. (All)
NURS 4581 Critical Care - Exam 1 Notes, University of Texas. When a metabolic acidosis occurs, the cell acts as a buffer by moving the excess H+ ions into the cell. In exchange, the cell will “kic... k” out potassium. With polyuria, the patient has “lost” K+, causing a decrease in the serum K+. As the sodium bicarbonate (NaHC03) is infusing, the pH increases. Hydrogen ions will move out of the cell. As H ions exit the cell, K ions will go back into the cell. The patient’s K+ level will decrease even more and the patient can go into an abnormal cardiac rhythm. Clinical note-if your patient is acidotic and HYPOkalemic-be cautious before correcting/treating the acidosis. Ventilator Weening Parameters Maximum Inspiratory Force/Pressure (MIF) -20 to -30 Minute volume <10L/minute Normal pCO2 35 – 45 pO2 > 60% FIO2 50% or less PEEP 5 cm or less Pressure Support Ventilation 10 or less (high level of PSV indicates that patient needs too much help inhaling or initiating a breath) Compensatory response --RENIN-ANGIOTENSIN-ALDOSTERONE SYSTEM (RAAS) [Show More]
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