Arterial Blood Gasses Flashcards
Why are arterial blood gasses collected?
to evaluate acid-base status, ventilation, and oxygenation of arterial blood.
What readings would give the person reading the ABG report an idea on how well the lungs are oxygenating the blood?
The partial pressure of oxygen (Pa02) in arterial blood and oxygen saturation levels (Sa02)
What readings would give you an idea on well the lungs are getting rid of carbon dioxide?
partial pressure of carbon dioxide in arterial blood (PaCO2)
Why is bicarbonate usually assess in ABG reports?
It is an important component of the chemical buffering system that keeps the blood from becoming too acidic or basic
How are ABG levels usually ordered in a report?
pH-PaCO2-PaO2-HCO3-
What is the mean range for pH levels in a regular healthy adult’s ABG report?
What conditions arise if the pH is elevate or decreased?
Mean Range: 7.35-7.45
Elevated- Alkalemia (pH over 7.45)
Decreased- Acidemia (pH under 7.35)
What is the mean range for PaCO2 levels in a regular healthy adult’s ABG report?
What conditions arise if the PaCO2 is elevate or decreased?
Mean Range: 35-45 mm Hg (Eucapnia)
Elevated: Hypercapnia (PaCO@ higher than 45 mm Hg)
Decreased: Hypocapnia (PaCO2 lower than 35 mm Hg)
What is the mean range for PaO2 levels in a regular healthy adult’s ABG report?
What conditions arise if the PaO2 is elevate or decreased?
Mean Range: 80-100 mm Hg
Mostly there is only a problem with low levels of O2 in the blood, this condition is called hypoxemia
Mild hypoxemia: PaO2 60-79 mm Hg
Moderate hypoxemia: PaO2 40-59 mm Hg
Severe hypoxemia: PaO2 under 40 mm Hg
What is hypoxemia?
low level of O2 in tissues despite adequate perfusion of the tissues
What is the mean range for HCO3- levels in a regular healthy adult’s ABG report?
22-26 mEq/L
What is the mean range for O2 saturation (SaO2) levels in a regular healthy adult?
95-98%
If a patient has a PaCO2 level over 45 mm Hg and their pH level is over 7.4 what would be indicated?
body is retaining CO2 to compensate for metabolic alkalosis
A patient has the following ABG levels:
PaCO2 < 35 mm HG
pH > 7.4
What would these levels indicate?
respiratory alkalosis
A patient has the following ABG levels:
PaCO2 < 35 mm HG
pH < 7.4
What would these levels indicate?
body is eliminating CO2 to compensate for metabolic acidosis
A patient has the following ABG levels:
HCO3- < 22 mEq/L
pH > 7.4
What would these levels indicate?
renal compensation for respiratory alkalosis
