Litholink
Urine Test Menu
Test list
| Test Name | Use | Test No. | Tests |
|---|---|---|---|
| Litholink 24-hour urine testing | Routine kidney stone work-up which includes the at-home kit. This is the most commonly ordered test. | 910235 | Volume, Calcium, Creatinine, Citrate, Phosphorus, pH, Sodium, Urea Nitrogen, Oxalate, Chloride, Ammonium, Magnesium, Potassium, Uric Acid, Sulfate, Qualitative Cystine screen, Urine Time Collection and supersaturation calculations. |
| Litholink 24-hour cystine testing | Special test for patients with known cystinuria or a patient with a positive qualitative cyctine screen from panel 910235. This panel includes a quantative measurement needed for management of patients with cystinuria. | 910245 | Quantitative cystine excretion as well as measurement of cystine supersaturation and capacity and a limited panel including Volume, pH, Sodium, Urea Nitrogen, Calcium, Creatinine, Phosphorus, and Citrate. |
| Litholink Serum Panel | Medical therapy to prevent recurrent stone formation. | 910103 | Potassium, Chloride, C02, Creatinine, Calcium, Phosphorus, Magnesium, Uric Acid |
Summary of 2026 Litholink reference range changes (adults age 16+)
| Analyte | Changed? | Old Range | New Range | Units |
|---|---|---|---|---|
| Vol24 | yes | 500-4000 | >2500mL/d | mL/24 hr |
| SSCaOx | yes | 6-10 | <7.50 | - |
| Ca24 | yes | Male<250 Female<200 | Male: 40-250 Female: 30-200 | mg/24 hr |
| Ox24 | yes | 20-40 | Male: <46 Female: <37 | mg/24 hr |
| Cit24 | yes | Male>450 Female>550 | Male:>400 Female:>530 | mg/24 hr |
| SSCaP | yes | 0.5-2 | <1.50 | - |
| pH | yes | 5.80-6.20 | 5.70-6.30 | - |
| SSUA | yes | <1.00 | <1.00 | - |
| UA24 | yes | Male<800 Female<750 | Male: 460-800 Female: 370-750 | mg/24 hr |
| Na24 | yes | 50-150 | 50-120 | mmol/24 hr |
| K24 | yes | 20-100 | 40-100 | mmol/24 hr |
| Mg24 | yes | 30-120 | 62-173 | mg/24 hr |
| P24 | no | 600-1200 | 600-1200 | mg/24 hr |
| NH4 24 | yes | 15-60 | 18-56 | mmol/24 hr |
| Cl24 | yes | 70-250 | 50-120 | mmol/24 hr |
| Sul24 | yes | 20-80 | 25-56 | meq/24 hr |
| UUN24 | yes | 6.00-14.00 | 7.00-15.00 | g/24 hr |
| PCR | no | 0.8-1.4 | 0.8-1.4 | g/kg/24 hr |
| Cr24 | no | No ref range | No ref range | mg/24 hr |
| Cr24/kg | no | Male 11.9-24.4 Female 8.7-20.3 | Male 11.9-24.4 Female 8.7-20.3 | mg/24 hr/kg |
| Ca24/kg | no | <4 | <4 | mg/24 hr/kg |
| Ca24/Cr24 | no | Male 34-196 Female 51-262 | Male 34-196 Female 51-262 | mg/g creatinine |
Cystine panel: Summary of 2026 Litholink reference range changes (adults age 16+)
| Analyte | Changed? | Old Range | New Range | Units |
|---|---|---|---|---|
| Vol24 | yes | 500-4000 | >2500mL/d | mL/24 hr |
| Cys 24 | no | <75 | <75 | mg/24 hr |
| SSSys | no | <0.10 | <0.10 | mg/L |
| Capacity | no | - | - | mg/L |
| pH | yes | 5.80-6.20 | 5.70-6.30 | - |
| Na24 | yes | 50-150 | 50-120 | mmol/24 hr |
| UUN24 | yes | 6.00-14.00 | 7.00-15.00 | g/24 hr |
| PCR | no | 0.8-1.4 | 0.8-1.4 | g/kg/24 hr |
| Cr24 | no | No ref range | No ref range | mg/24 hr |
| Ca24 | yes | Male<250 Female<200 | Male: 40-250 Female: 30-200 | mg/24 hr |
| P24 | no | 600-1200 | 600-1200 | mg/24 hr |
| Cit24 | no | Male>450 Female>550 | Male:>400 Female:>530 | mg/24 hr |
| PCR | no | 0.8-1.4 | 0.8-1.4 | g/kg/24 hr |
| SS Br | no | 0.5-1 | 0.5-1 | - |
| Ca24/kg | no | <4 | <4 | mg/24 hr/kg |
| Cr24/kg | no | Male 11.9-24.4 Female 8.7-20.3 | Male 11.9-24.4 Female 8.7-20.3 | mg/24 hr/kg |