Cervical Dilation Rate Calculator
Actual independently clinically assessed two-exam dilation change/time. Signed apparent regression retained as measurement discrepancy, not linear labour forecast, abnormal-progress threshold or intervention indication.
Description
Cervical dilation rate compares two independently assessed measurements over elapsed examination time.
Cervical dilation rate compares two independently assessed measurements over elapsed examination time.1
A signed rate does not establish a normal labor trajectory.
When to use Cervical Dilation Rate Calculator
Use this tool to calculate or review the supplied observations under the stated rules. Establish the observation date, units, measurement context and independently applicable clinical reference or calibrated model.
How to use Cervical Dilation Rate Calculator and understand its results
- Establish the observation date, units, measurement context and independently applicable clinical reference or calibrated model.
- Enter independentlyAssessedPreviousDilationCm, independentlyAssessedCurrentDilationCm, elapsedExamHours, using the field meanings and rules below, then run the tool.
- Read result.signedObservedDilationCmPerHour. Use the units and sign conventions below.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| independentlyAssessedPreviousDilationCm | Independently assessed previous dilation cm | number | Required |
| independentlyAssessedCurrentDilationCm | Independently assessed current dilation cm | number | Required |
| elapsedExamHours | Elapsed exam hours | number | Required |
Require previous/current dilation within inclusive 0–10 centimeters and positive elapsed examination hours. Fractional measurements are accepted. Divide current-minus-previous by hours, preserving negative change.
dilationCmPerHour=(currentCm−previousCm)/elapsedHours Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Structured result; its nested fields below contain the actual calculation or selected reference | object |
| result.signedObservedDilationCmPerHour | Signed Observed Dilation Cm Per Hour; preserve the subtraction order and sign defined in the mechanics | number |
{
"input": {
"independentlyAssessedPreviousDilationCm": 3,
"independentlyAssessedCurrentDilationCm": 5,
"elapsedExamHours": 2
},
"output": {
"result": {
"signedObservedDilationCmPerHour": 1
}
}
}Limitations and assumptions
Dating evidence, acquisition conditions and applicable clinical references remain independently established. The output describes supplied observations or a conditional model without diagnosing an outcome, choosing a dose or verifying clinical applicability.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Extremely large composite outputs are rejected.
Alternative or Complementary methods
For a related step, use Total Labor Duration Calculator: Total labor duration requires independently established onset and endpoint boundaries. For a complementary comparison, use Second Stage Labor Duration Calculator: Second-stage labor duration depends on independently identified stage boundaries.
References
-
Cervical Dilation Rate Calculator — tool.io
Similar or alternative tools
- Total Labor Duration Calculator
Total labor duration requires independently established onset and endpoint boundaries.
- Second Stage Labor Duration Calculator
Second-stage labor duration depends on independently identified stage boundaries.