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ABG 69

Unit I Slides

The most abundant base in body fluids HCO3
A substance that reacts with an acid or base to prevent large change in pH Buffer
What is normal blood pH at sea level? 7.35-7.45
Normal urine pH? 4-8
Can generate additional bicarbonate and eliminate excess  hydrogen, responds from hours to days! can maintain balance indefinitely in chronic imbalances Renal System
Acid-base Imbalance is produced when ____ ratio between acid and base content is altered. Occurs when compensatory mechanisms fail 1:20
Affect carbonic acid concentration Respiratory Imbalance
Affect bicarbonate Metabolic Imbalance
Provide information about: Acid-base status, Underlying cause of imbalance, Body’s ability to regulate pH, Overall oxygen status ABG's
What is normal paCO2 at sea level? 35-45 mmHg
What is normal paO2 at sea level? 80-100 mmHg
What is normal HCO3- at sea level? 22-26 mEq/L
What is normal SaO2 at sea level? >95%
What is the bodies compensatory mechanism for Respiratory Acidosis? Kidneys conserve HCO3- and secrete H+ into urine
Primary cause is due to hypoxemia due to acute pulmonary disorder, Hyperventilation, Compensation- buffering with Cl- shift out of cell (acute); renal excretion of HCO3 -(chronic) Respiratory Akalosis
Causes LOC, confusion, restlessness, stupor, coma, Headache, Tachycardia, dysrhythmias, Warm/flushed skin, Hyperkalemia? Respiratory Acidosis
Causes DKA, uremia, acidic drugs, lactic acidosis, renal failure? Metabolic Acidosis (Add +1acid)
Diarrhea, pancreatic problems, laxatives? Metabolic Acidosis (Minus -1 base)
Kussmaul respiration; kidneys attempt to excrete additional acid? Compensation for Metabolic Acidosis
Caused by antacids, massive blood transfusions? Metabolic Alkalosis (Add+1 base)
Etiology; NGT suction, vomiting, steroids, diuretic therapy, hypokalemia? Metabolic Alkalosis (Minus -1 acid)
What is the compensatory mechanism for Metabolic Alkalosis? Decreased respiratory rate; renal excretion of HCO3
CNS excitability, hyperactive reflexes, convulsions, Dysrhythmias, Hypokalemia, Treatment- treat cause, K replacement, +/- Diamox? Metabolic Alkalosis- Behavior/Treatment
The three mechanisms by which the body regulates acid-base balance. Buffer, Respiratory & Renal
Is the fastest-acting system and the primary regulator of acid-base balance. Buffer System
Created by: BOjangles1006