Description
Convert a supplied nonclinical per-time slope using an explicit source-to-target elapsed-time ratio.
Pharmacokinetic research describes concentration over time using measurement units and an explicit model. Concentration-time area, its time-weighted moment, inverse-time rate constants, clearance, and volume are related but distinct quantities. A conversion or local model term does not estimate every parameter or validate a complete study.
Convert a supplied nonclinical per-time slope using an explicit source-to-target elapsed-time ratio.
When to use this tool
Use Terminal Slope Time Unit Factor when you need this concentration-time conversion, sampling check, local integral panel, or explicitly supplied kinetic-model term.
How to use the tool and how it works
- Enter slope, sourceTimeInTargetUnits. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read convertedSlope. Use the output convention below.
For positive sourceTimeInTargetUnits return convertedSlope=slope/sourceTimeInTargetUnits.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| slope | Slope | Required. Finite number. |
| sourceTimeInTargetUnits | Target-time units per one source-time unit; divide inverse-time slope by this. | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| convertedSlope | Converted Slope | Required. Finite number. |
{
"input": {
"slope": -2,
"sourceTimeInTargetUnits": 60
},
"output": {
"convertedSlope": -0.03333333333333333
}
}Limitations and assumptions
- Slope uses inverse source-time units and the divisor is target-time units per one source-time unit. This conversion preserves slope sign without fitting a terminal phase or estimating elimination.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Signed zero is exported as zero.
Alternative or Complementary methods
Use a complete study analysis when a local panel, transformation, or model factor is insufficient. Check sampling times, censoring, assay support, unit conventions, and the validity of the assumed kinetic regime.
References
Similar or alternative tools
- PK Log Linear Terminal Slope Two Points
Two-point research log slope; no terminal-phase selection or dosing inference.
- Nonclinical Concentration Logstep
Compare explicitly supplied nonclinical concentration observations without dosing or extrapolated patient predictions.