Description
Calculate mean flow from a supplied urinary volume and flow duration.
Urinary records distinguish collected volume, collection duration, mean flow, anatomical side and the source of symptom codes. Millilitres, litres and cubic millimetres are volume units; dividing volume by a specified interval gives a mean rate. A diary transcription or volume balance needs verified collection and clinical context before it can inform care.
Calculate mean flow from a supplied urinary volume and flow duration.
When to use this tool
Use Uroflow Mean Rate Volume Time when you already have volumeMilliliters, flowDurationSeconds and need to calculate mean flow from a supplied urinary volume and flow duration.
How to use the tool and how it works
- Enter volumeMilliliters, flowDurationSeconds. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read meanMillilitersPerSecond. Use the output convention below.
Require volumeMilliliters>=0 and flowDurationSeconds>0; return volume/duration in mL/s.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| volumeMilliliters | Volume Milliliters | Required. Finite number; minimum 0. |
| flowDurationSeconds | Positive supplied flow interval in seconds; not an inferred whole observation duration. | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| meanMillilitersPerSecond | Mean Milliliters Per Second | Required. Finite number. |
{
"input": {
"volumeMilliliters": 300,
"flowDurationSeconds": 30
},
"output": {
"meanMillilitersPerSecond": 10
}
}Limitations and assumptions
- The denominator is supplied flow duration, not necessarily the whole visit or observation interval; no peak flow or clinical interpretation is inferred.
- 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. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Review the original collection log, measurement units and instrument protocol before interpreting a volume or flow. Use the full recorded trace for peak or time-varying flow; a mean or transcription is only one component of that record.
References
Similar or alternative tools
- Voiding Event Volume Unit
Convert a recorded voiding-event volume between millilitres and litres.
- Urine Collection Duration Label
Label a supplied urine-collection duration and convert hours to minutes.