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43 Cards in this Set

  • Front
  • Back
pH indicates the number of
Hydrogen Ions H+
Normal range for pH
7.35 - 7.45
condition in which acid accumulates in the body
condition in which base substances accumulate in the body
pH Up
pH down
1st step to blood gas interpretation
look at pH and determin a/b status
2nd step to blood gas interpretation
look at respiratory component to see if the imbalance is due to a respiratory reason
3rd step to blood gas interpretation
look at metabolic component to determine if imbalance is due to a metabolic reason
What is the normal ratio of base to acid?
Measures the pressure exerted by CO2 dissolved in the blood
Respiratory component of blood gases
PCO2 normal values
35 - 45 mmHg
Measures the amount of bicarbonate (base) in blood
Metabolic component of blood gases
HCO3 normal values
22 - 26 mEq/L
measures the patial pressure of O2 dissolved in blood
indicates the ability of the lungs to allow Oxygen to diffuse into bloodstream
Normal range of PO2
80 - 100 mm Hg
Percentage of hemoglobin that is saturated w/ oxygen
O2 saturation
each molecule of hemoglobin can carry how many molecules of oxygen?
Normal value for O2 saturation
95 - 100%
measures all the bases inteh blood that are available to help buffer
Base Excess (BE)
Normal value for base excess
-2 to +2
provides a more complete picture of body's ability to buffer
Base Excess (BE)
3 causes of respiratory acidosis
1. primary lung function problem
2. changes in the lungs from secondary problems
3. condition that obstructs airway or depresses respiratory effort
what condition is caused by increases in CO2 in blood causing an increase in H+
respiratory acidosis
in what condition does K+ move out of cells so H+ move into cells creating high serum potassium levels
in what condition do cells release H+ into the blood and K+ move into cells from blood serum causing low K+ levels
in what condition does CO2 increase and HCO3 decrease?
in what condition does CO2 decrease and HCO3 increase?
if pH is abnormal and both CO2 and HCO3 are abnormal, what is the compensation level?
partially compensated
if pH is abnormal and either, but not both, CO2 or HCO3 is abnormal, what is the compensation level?
if pH is normal and both CO2 and HCO3 is abnormal, what is compensation level?
what are some possible reasons for metabolic acidosis? (handout from class)
Diabetic ketoacidosis, shock, kidney failure
what are some reasons for respiratory acidosis (handout from class)
sedation, shock, severe pneumonia
what are some reasons for metabolic alkalosis
vomiting, fever, tachypnea
what are some reasons for respiratory alkalosis?
hyper ventilation, pain, anxiety
If a person has
pH 7.24
PCO2 31
HCO3 18
what acid/base condition is it and what may have caused it?
part. compensated metabolic acidosis; Diabetic ketoacidosis
pH: 7.16
CO2: 64
HCO3: 28
partially compensated resp. acidosis; asthma
pH: 7.52
CO2: 28
PCO3: 20
partially compensated respiratory alkalosis; hyperventilation or pain
pH: 7.48
CO2: 40
PCO3: 32
partially compensated metabolic alkalosis; vomiting
pH: 7.37
HCO3: 34
metabolic alkalosis, compensated; sedation