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Questions and Answers
A patient presents with the following ABG results:
- pH: 7.29
- PaCO2: 52 mmHg
- HCO3-: 25 mEq/L
What is the acid-base disturbance?
A patient presents with the following ABG results:
- pH: 7.29
- PaCO2: 52 mmHg
- HCO3-: 25 mEq/L What is the acid-base disturbance?
- Respiratory acidosis (correct)
- Respiratory alkalosis
- Metabolic acidosis
- Metabolic alkalosis
A patient with diabetic ketoacidosis (DKA) has the following ABG results:
- pH: 7.22
- PaCO2: 28 mmHg
- HCO3-: 12 mEq/L
What is the primary acid-base disturbance?
A patient with diabetic ketoacidosis (DKA) has the following ABG results:
- pH: 7.22
- PaCO2: 28 mmHg
- HCO3-: 12 mEq/L What is the primary acid-base disturbance?
- Metabolic alkalosis
- Respiratory acidosis
- Metabolic acidosis (correct)
- Respiratory alkalosis
A patient with prolonged vomiting has the following ABG results:
- pH: 7.50
- PaCO2: 47 mmHg
- HCO3-: 34 mEq/L
What is the acid-base disturbance?
A patient with prolonged vomiting has the following ABG results:
- pH: 7.50
- PaCO2: 47 mmHg
- HCO3-: 34 mEq/L What is the acid-base disturbance?
- Respiratory acidosis with compensation
- Metabolic acidosis
- Metabolic alkalosis with compensation (correct)
- Respiratory alkalosis
A patient with a history of COPD presents with the following ABG results:
- pH: 7.37
- PaCO2: 55 mmHg
- HCO3-: 30 mEq/L
What is the acid-base status?
A patient with a history of COPD presents with the following ABG results:
- pH: 7.37
- PaCO2: 55 mmHg
- HCO3-: 30 mEq/L What is the acid-base status?
A patient experiencing sepsis has the following ABG results:
- pH: 7.31
- PaCO2: 32 mmHg
- HCO3-: 16 mEq/L
What is the acid-base disturbance?
A patient experiencing sepsis has the following ABG results:
- pH: 7.31
- PaCO2: 32 mmHg
- HCO3-: 16 mEq/L What is the acid-base disturbance?
A post-operative patient is hypoventilating and presents with the following ABG results:
- pH: 7.20
- PaCO2: 60 mmHg
- HCO3:: 24 mEq/L
What is the acid-base disturbance?
A post-operative patient is hypoventilating and presents with the following ABG results:
- pH: 7.20
- PaCO2: 60 mmHg
- HCO3:: 24 mEq/L What is the acid-base disturbance?
A patient has the following ABG results:
- pH: 7.45
- PaCO2: 30 mmHg
- HCO3-: 20 mEq/L
What is the acid-base status?
A patient has the following ABG results:
- pH: 7.45
- PaCO2: 30 mmHg
- HCO3-: 20 mEq/L What is the acid-base status?
A patient presents with the following ABG results:
- pH: 7.10
- PaCO2: 60 mmHg
- HCO3-: 18 mEq/L
What is the acid-base disturbance?
A patient presents with the following ABG results:
- pH: 7.10
- PaCO2: 60 mmHg
- HCO3-: 18 mEq/L What is the acid-base disturbance?
Flashcards
Respiratory Acidosis
Respiratory Acidosis
A state where the blood pH is below 7.35 due to an excess of CO2 in the blood, often caused by hypoventilation.
Metabolic Acidosis
Metabolic Acidosis
A state where the blood pH is below 7.35 due to an increase in acid production or a loss of bicarbonate, often seen in diabetic ketoacidosis, kidney failure, or severe diarrhea.
Respiratory Alkalosis
Respiratory Alkalosis
A state where the blood pH is above 7.45 due to a decrease in CO2 levels in the blood, often caused by hyperventilation.
Metabolic Alkalosis
Metabolic Alkalosis
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Compensation
Compensation
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Fully Compensated Acid-Base Disturbance
Fully Compensated Acid-Base Disturbance
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Uncompensated Acid-Base Disturbance
Uncompensated Acid-Base Disturbance
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Mixed Acid-Base Disturbance
Mixed Acid-Base Disturbance
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PaCO2 (Partial Pressure of Carbon Dioxide)
PaCO2 (Partial Pressure of Carbon Dioxide)
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HCO3- (Bicarbonate)
HCO3- (Bicarbonate)
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pH (Potential of Hydrogen)
pH (Potential of Hydrogen)
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Diabetic Ketoacidosis (DKA)
Diabetic Ketoacidosis (DKA)
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Chronic Obstructive Pulmonary Disease (COPD)
Chronic Obstructive Pulmonary Disease (COPD)
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Sepsis
Sepsis
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Hypoventilation
Hypoventilation
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Hyperventilation
Hyperventilation
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Prolonged Vomiting
Prolonged Vomiting
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Hypoventilation
Hypoventilation
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Dyspnea
Dyspnea
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Hyperpnea
Hyperpnea
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Acidosis
Acidosis
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Alkalosis
Alkalosis
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Buffer
Buffer
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Bicarbonate (HCO3-)
Bicarbonate (HCO3-)
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Carbon Dioxide (CO2) Elimination
Carbon Dioxide (CO2) Elimination
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Hypoventilation
Hypoventilation
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Hyperventilation
Hyperventilation
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Acid Production or Retention
Acid Production or Retention
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Bicarbonate Loss
Bicarbonate Loss
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Bicarbonate Retention
Bicarbonate Retention
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Acid Loss
Acid Loss
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Acid Retention
Acid Retention
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Study Notes
Acid-Base Imbalances
- Definition: Acid-base imbalances are disturbances in the body's pH balance, impacting various physiological processes.
- Assessment: Blood gas analysis (ABG) measurements, including pH, PaCO2, and HCO3-, are crucial for diagnosing acid-base imbalances.
Respiratory Acidosis
- Cause: Hypoventilation, impairing CO2 elimination.
- pH: Low (acidic)
- PaCO2: Elevated
- HCO3-: May be normal (uncompensated) or slightly elevated (compensated)
- Compensation: Kidneys attempt to retain bicarbonate to compensate for the decreased pH.
Metabolic Acidosis
- Cause: Excess acid production, loss of bicarbonate
- pH: Low (acidic)
- PaCO2: Often decreased (compensatory hyperventilation)
- HCO3-: Low
- Compensation: Lungs attempt to decrease CO2 by increasing the RR (rate and depth) to restore pH within the normal range.
Respiratory Alkalosis
- Cause: Hyperventilation, leading to excessive CO2 loss.
- pH: High (alkaline)
- PaCO2: Low
- HCO3-: May be normal (uncompensated) or slightly decreased (compensated).
- Compensation: Kidneys attempt to excrete bicarbonate to counteract the alkaline pH.
Metabolic Alkalosis
- Cause: Loss of acid, or excess bicarbonate intake
- pH: High (alkaline)
- PaCO2: Often increased (compensatory hypoventilation).
- HCO3-: Elevated.
- Compensation: Lungs attempt to increase CO2 to bring CO2 back to normal levels.
Diabetic Ketoacidosis (DKA)
- Type of Acid-base Imbalance: Metabolic acidosis.
- Cause: Insufficient insulin causes the body to break down fats for energy, producing ketones that lower blood pH. Fat metabolism produces acidic ketones.
Determining the Acid-Base Imbalance
- A patient's symptoms and clinical presentation must be considered in conjunction with the ABG results to confirm and justify the cause for a particular acid-base imbalance.
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Description
This quiz covers the concepts of acid-base imbalances, highlighting their definitions, causes, and assessment techniques. It focuses on understanding respiratory acidosis, metabolic acidosis, and respiratory alkalosis, including the body's compensatory mechanisms. Test your knowledge on blood gas analysis and its significance in diagnosing these imbalances.