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Questions and Answers
What is the normal range for ammonia levels in the blood?
What is the normal range for ammonia levels in the blood?
- 0–30 mcmol/L
- 6–47 mcmol/L (correct)
- 5–50 mcmol/L
- 10–40 mcmol/L
Which of the following is a significant indication for measuring ammonia levels?
Which of the following is a significant indication for measuring ammonia levels?
- Diabetes Management
- Diagnosis of severe liver diseases (correct)
- Evaluation of kidney function
- Assessment of cardiovascular health
Which substance is primarily responsible for converting ammonia into urea?
Which substance is primarily responsible for converting ammonia into urea?
- Lungs
- Heart
- Kidneys
- Liver (correct)
Which factor can lead to an increase in blood ammonia levels?
Which factor can lead to an increase in blood ammonia levels?
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Which of the following conditions is associated with elevated ammonia levels?
Which of the following conditions is associated with elevated ammonia levels?
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Study Notes
Ammonia Blood Test
- Measures the amount of ammonia in the blood
- Ammonia is produced when the body breaks down protein
- The liver converts ammonia to urea, excreted through the urine
- Normal range: 6–47 mcmol/L
Purpose
- Assess liver function
- Monitor the effectiveness of treatment for severe liver disease
- Check ammonia levels in individuals receiving total parenteral nutrition
Indications
- Used to diagnose severe liver diseases
Interfering Factors
- Smoking
- High-protein or low-protein diet
- Medications that increase blood ammonia: loop diuretics, narcotics, thiazides, alcohol
- Medications that decrease blood ammonia: broad-spectrum antibiotics, levodopa, potassium salts
- Strenuous exercise before the test
Results and Significance
- Lower levels: Essential or malignant hypertension
- Higher levels:
- Liver disease (cirrhosis or hepatitis)
- Reye syndrome
- Heart failure
- Kidney failure
- Severe bleeding from the stomach or intestines
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