Urine Specific Gravity Correction
Correct urine concentration to a caller-selected specific-gravity reference.
Description
Specific-gravity correction scales a urine concentration to a reference dilution basis.
Specific-gravity correction scales a urine concentration to a reference dilution basis. The chosen baseline determines which gravity excess enters the quotient.1
Correct urine concentration to a caller-selected specific-gravity reference.
When to use Urine Specific Gravity Correction
Use this tool to correct urine concentration to a caller-selected specific-gravity reference.
Prepare the measured profile, formula counts, upstream model outputs or caller-defined reference criteria requested. Keep paired entries aligned and units, sample basis and preprocessing consistent.
How to use Urine Specific Gravity Correction and understand its results
- Prepare the measured profile, formula counts, upstream model outputs or caller-defined reference criteria requested. Keep paired entries aligned and units, sample basis and preprocessing consistent.
- Enter measuredConcentration, urineSpecificGravity, referenceSpecificGravity, baselineSpecificGravity using the field table and calculation rules, then run the tool.
- Read dilutionCorrectionFactor, correctedConcentration. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| measuredConcentration | Measured concentration | number | Required |
| urineSpecificGravity | Urine specific gravity | number | Required |
| referenceSpecificGravity | Reference specific gravity | number | Required |
| baselineSpecificGravity | Baseline specific gravity | number | Required |
Enter finite concentration and gravities, with urine and reference strictly above baseline. Return positive correction factor and scaled concentration; signed concentration values are accepted.
factor=(referenceSG−baselineSG)/(urineSG−baselineSG); corrected=measured×factor Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| dilutionCorrectionFactor | Dilution correction factor | number |
| correctedConcentration | Corrected concentration | number |
{
"input": {
"measuredConcentration": 10,
"urineSpecificGravity": 1.01,
"referenceSpecificGravity": 1.02,
"baselineSpecificGravity": 1
},
"output": {
"dilutionCorrectionFactor": 2,
"correctedConcentration": 20
}
}Limitations and assumptions
No sample measurement or clinical interpretation is supplied. Baseline/reference choices and applicability to the analyte require independent justification.
Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Creatinine Normalized Excretion: Normalize urinary metabolite concentration to creatinine. For a complementary task, use Freezing Point Osmolality: Estimate osmolality by a caller-calibrated freezing-point depression.
References
-
Urine Specific Gravity Correction — tool.io
Similar or alternative tools
- Creatinine Normalized Excretion
Normalize urinary metabolite concentration to creatinine.
- Freezing Point Osmolality
Estimate osmolality by a caller-calibrated freezing-point depression.