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Arterial Blood Gas

QuestionAnswer
What does ABG's determine? They are used to determine the oxygen level and managment of mechanical ventilation.
What is the normal pH range? 7.35-7.45mm Hg.
What is the normal range for PaCO2 35-45mm Hg.
What is the normal range for PaO2 80-100mm Hg.
What is the normal range for HCO3 22-26mEq/L
What does the pH measure? The pH measures the state of blood:acid or base.
What does the PaCO2 measure? The PaCO2 measures the partial pressure of carbon dioxide.
What does the PaO2 measure? The PaO2 measures the partial pressure of oxygen.
What does the HCO3 measure? The HCO3 measures the concentration of bicarbonate (metabolic issues).
What three ways do we classify the primary problem of ABG's as? normal, acidosis, or alkalosis.
What two types do we classify as the primary cause of ABG's as? respiratory or metabolic.
Which of the parameters is the respiratory component? PCO2
Which of the parameters is the metabolic component? HCO3
What happens to the pH when there is a increase in H+? The pH will decrease and become acidotic(<7.35).
What happens to the pH when there is a decrease in H+? The pH will increase and become alkalotic(>7.45).
Under what range of the pH will a patient have to be intubated? Anything less than 7.2
If the ph and PcO2 are going in opposite directions what does this indicate? A respiratory problem
If the ph and HCO3 are going in the same direction what does this indicate? A metabolic problem
What type of compensation is indicated when the pH, PCO2, and HCO3 are all out of range? partially compensated
What type of compensation is indicated when either the pH or PCO2 is out of range? uncompensated
What type of compensation is indicated when the pH is normal and the PCO2/HCO3 are out of range? fully compensated
pH-7.51, PaCO2-40, HCO3-31 uncompensated metabolic alkalosis
pH-7.30, PaCO2-59, HCO3-28 partially compensated respiratory acidosis
pH-7,62, PaCO2-47, HCO3-30 partially compensated metabolic alkilosis
pH-7.48, PaCO2-30, HCO3-23 uncompensated respiratory alkalosis
pH-7.36, PaCO2-30, HCO3-15, PaO2-80 fully compensated metabolic acidosis
What does the SaO2 meausure? The percentage of oxygen saturation of arterial blood.
Wat is the normal range for SaO2? 93-100
What is the normal range for base excess? -2.0 to 2.0
What is the normal range for CaO2? 16-22 mlO2/dl
What two things are used to determine the accurate percentage of the MetHb and the COHb? ABG and co-oximeter
What values are considered for a patient to be acidotic? pH<7.5 PaCO2>45 HCO3<22
What values are considered for a patient to be alkolotic? pH>7.45 PaCO2<35 HCO3>26
What is the most important value to examine when looking at ABG's? oxygen
How is ventilation measured? PaCO2 levels
How is oxygenation measured? PaO2 levels
step 1 in interpreting ABG's? classify primary problem
step 2 in interpreting ABG's? classify primary cause
step 3 in interpreting ABG's? classify compensation
Created by: LLP21