Description
Calculate plantar contact time as a share of observed time.
Foot-care records distinguish laterality, measured dimensions, device geometry and observation-time denominators. A supplied length/width label is not automatically a lesion area, and contact time is not a pressure measurement. Interpreting these records for health or device use requires verified measurements and qualified clinical context.
Calculate plantar contact time as a share of observed time.
When to use this tool
Use Plantar Contact Duration Fraction when you already have contactSeconds, observationSeconds and need to calculate plantar contact time as a share of observed time.
How to use the tool and how it works
- Enter contactSeconds, observationSeconds. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read contactFraction, noncontactSeconds. Use the output convention below.
Require observationSeconds>0 and contactSeconds within observation; return contact/observation and observation-contact.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| contactSeconds | Contact Seconds | Required. Finite number; minimum 0. |
| observationSeconds | Observation Seconds | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| contactFraction | Contact Fraction | Required. Finite number. |
| noncontactSeconds | Noncontact Seconds | Required. Finite number. |
{
"input": {
"contactSeconds": 0.6,
"observationSeconds": 1
},
"output": {
"contactFraction": 0.6,
"noncontactSeconds": 0.4
}
}Limitations and assumptions
- The denominator is supplied observation time; no gait phase, pressure, pathology or treatment recommendation 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 examination or device measurement with its site, side and unit convention. Use the complete recorded gait or pressure measurement for functional questions; one contact-time fraction or dimensional label describes a limited observation.
References
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