Stone Analysis Kidney (Renal) calculus
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Determine kidney stones chemical and crystalline composition
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🧪 What is Stone Analysis (Kidney Calculus)?
Stone Analysis involves the laboratory examination of kidney stones (renal calculi) passed in the urine or surgically removed, to determine their chemical and crystalline composition.
❓ Why is the Test Done?
To:
- Identify the type of kidney stone for targeted prevention and treatment
- Determine underlying metabolic or dietary causes
- Guide dietary and pharmacological management to reduce recurrence
- Differentiate between various stone types (calcium oxalate, uric acid, struvite, cystine)
🔬 How the Test is Performed
- Stone sample is collected and sent to the laboratory
- Analyzed using techniques like:
- Fourier-transform infrared spectroscopy (FTIR)
- X-ray diffraction (XRD)
- Chemical analysis
📊 Common Types of Kidney Stones
Stone Type | Composition | Associated Conditions |
|---|---|---|
Calcium oxalate | Calcium oxalate monohydrate or dihydrate | Hyperoxaluria, hypercalciuria |
Calcium phosphate | Hydroxyapatite, brushite | Renal tubular acidosis, hyperparathyroidism |
Uric acid | Uric acid crystals | Gout, high purine diet, acidic urine |
Struvite | Magnesium ammonium phosphate | Urinary tract infections with urease bacteria |
Cystine | Cystine (amino acid) | Cystinuria (genetic disorder) |
📈 Interpretation of Results
Result | Clinical Implication |
|---|---|
Identification of stone type | Directs treatment and prevention strategies |
Mixed stone composition | Suggests multifactorial etiology |
Infection-related stones | Indicates need to treat underlying infection |
🧠 Associated Conditions
Condition | Details |
|---|---|
Nephrolithiasis | Formation of stones causing pain and obstruction |
Metabolic disorders | Hypercalcemia, hyperuricemia, cystinuria |
Urinary tract infections | Can lead to struvite stone formation |
Dietary factors | High oxalate, purine intake, dehydration |
🔄 Related / Follow-Up Tests
- Urinalysis – pH, crystals, infection
- Serum calcium, uric acid, phosphate
- 24-hour urine collection – assess stone risk factors
- Imaging studies – ultrasound, CT KUB
- Metabolic evaluation for recurrent stones
✅ Fasting Required?
Test | Fasting Required |
|---|---|
Stone Analysis | ❌ No |
📝 Summary Table
Parameter | Details |
|---|---|
What | Chemical and crystalline analysis of kidney stones |
Why | Identify stone type to guide prevention and treatment |
Common Stone Types | Calcium oxalate, calcium phosphate, uric acid, struvite, cystine |
Associated Conditions | Metabolic disorders, infections, dietary causes |
Follow-up Tests | Urinalysis, serum chemistries, 24-hour urine studies |
Fasting Required | ❌ No |
How our test process works!
