Description
Compare two pressure values after separate zero correction.
Cardiac measurement formulas depend on geometry, units, calibration and reference origins. A Doppler projection correction, echo disc-volume contribution or waveform integral evaluates supplied quantities without validating image acquisition, signal quality or physiological interpretation.
Compare two pressure values after separate zero correction.
When to use this tool
Use Pressure Zero Reference Gap when checking one supplied cardiac measurement, geometry or calibration term.
How to use the tool and how it works
- Enter measured, measuredZero, reference, referenceZero. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read correctedMeasured, correctedReference, gap. Use the output convention below.
Compare two pressure values after separate zero correction. correctedMeasured = measured-measuredZero, correctedReference = reference-referenceZero, gap subtracts the corrected values.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| measured | Measured | Required. Finite number. |
| measuredZero | Measured Zero | Required. Finite number. |
| reference | Reference | Required. Finite number. |
| referenceZero | Reference Zero | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| correctedMeasured | Corrected Measured | Required. Finite number. |
| correctedReference | Corrected Reference | Required. Finite number. |
| gap | Signed difference under the stated comparison convention, with matching units. | Required. Finite number. |
{
"input": {
"measured": 12,
"measuredZero": 2,
"reference": 8,
"referenceZero": 1
},
"output": {
"correctedMeasured": 10,
"correctedReference": 7,
"gap": 3
}
}Limitations and assumptions
- Use matching pressure units; actual transducer zero, accuracy and clinical pressure interpretation are not verified.
- 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
Use validated acquisition and calibration, a complete appropriate measurement method and qualified clinical interpretation; assess measurement uncertainty and model assumptions separately.
References
Similar or alternative tools
- Pressure Wave Baseline Offset
Return baseline-corrected and reference-shifted waveform pressure.
- Pressure Transducer Hydrostatic Offset Term
Return a hydrostatic pressure-offset correction.