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**Overview**: Kidney Stone Diagnostic Panel**Introduction**: The Kidney Stone Diagnostic Panel is a diagnostic tool designed to diagnose kidney stone risk using urine and serum samples. In India, urolithiasis affects ~10-15 percent of the population (higher in northern "stone belt" regions due to hot climate, low fluid intake, high oxalate diet), with recurrent stones leading to obstruction, infection, or renal failure. High morbidity from under-testing in rural/low-SES patients with flank pain or hematuria, limited labs, delayed dietary modification or lithotripsy leading to chronic kidney damage. Per urology practices aligned with ICMR and Urological Society of India guidelines, the test employs spectrophotometry for urine calcium, oxalate, uric acid, citrate, phosphorus, pH, volume, and serum calcium, uric acid, phosphorus, magnesium, creatinine, PTH over 1-2 days with high accuracy, valuable for identifying metabolic abnormalities. This diagnostic falls under renal screening and targets patients with recurrent stones, family history, or metabolic risk, addressing accurate detection to guide stone analysis, diet, or medical dissolution. With elevated morbidity due to underdiagnosis, the test supports public health efforts by enabling precise metabolic profiling and reducing stone recurrence. Its dual urine/serum approach ensures reliable risk assessment.**Other Names**: Kidney Stone Diag Pnl.**FDA Status**: FDA approved, CLIA certified for biochemistry, compliant with 2025 standards.**Historical Milestone**: Metabolic stone workup standard; in India, key in urolithiasis clinics.**Purpose**: The test assesses 13 parameters including urine calcium to guide kidney stone risk diagnosis, identify metabolic causes, inform prevention.**Test Parameters**: 1. Urine Calcium, 2. Urine Oxalate, 3. Urine Uric Acid, 4. Urine Citrate, 5. Urine Phosphorus, 6. Serum Calcium, 7. Serum Uric Acid, 8. Serum Phosphorus, 9. Serum Magnesium, 10. Serum Creatinine, 11. Urine pH, 12. Urine Volume, 13. PTH.**Pretest Condition**: Fasting 10-12 hours recommended; patients should report flank pain or stone history.**Specimen**: 10 mL urine (sterile container) + 3 mL serum in 1 SST, transported within specified times to maintain sample viability.**Sample Stability at Room Temperature**: Urine: 24 hours, Serum: 8 hours with proper handling to preserve analyte integrity, ensuring reliable test performance.**Sample Stability at Refrigeration**: Urine: 7 days, Serum: 7 days at 2-8 degrees Celsius, suitable for short-term storage before laboratory processing, though immediate testing is preferred.**Sample Stability at Frozen**: Urine: 6 months, Serum: 6 months at -20 degrees Celsius, allowing long-term storage for retesting, though freezing may affect some analytes.**Medical History**: Patients should provide details on stone episodes, diet, fluid intake.**Consent**: Written informed consent is required, detailing the test's purpose, potential risks of recurrent stones including renal failure, benefits of metabolic screening, and minimal discomfort from sampling.**Procedural Considerations**: The test involves sample processing using spectrophotometry by trained personnel to ensure sterile technique, avoid contamination, and interpret results within 1-2 days using provided controls. Laboratories must maintain a controlled environment, adhere to quality assurance protocols.**Factors Affecting Result Accuracy**: Delays beyond stability periods, improper storage conditions, or dietary variation can affect results. Correlation with clinical evaluation or additional testing is recommended to confirm findings.**Clinical Significance**: Abnormal levels (high oxalate/low citrate) indicate stone risk, necessitating specialist input.**Specialist Consultation**: Urologists or nephrologists should be consulted for management.**Additional Supporting Tests**: Stone analysis, CT KUB for confirmation.**Test Limitations**: Diet-dependent; comprehensive approach required.**References**: Indian Journal of Urology 2024, Urolithiasis Studies India 2023. |
