Description
Subtract a supplied zero reading from a pulmonary gas-analyzer observation.
Respiratory records distinguish signal markers, gas-reference bases, collection validity codes and selected prediction equations. A supplied interval or zero subtraction is only one part of a measurement workflow. Unit labels and device-use discrepancies do not validate a maneuver, estimate a disease state or determine appropriate medication use.
Subtract a supplied zero reading from a pulmonary gas-analyzer observation.
When to use this tool
Use Pulmonary Gas Analyzer Zero Offset when you already have observedValue, suppliedZero and need to subtract a supplied zero reading from a pulmonary gas-analyzer observation.
How to use the tool and how it works
- Enter observedValue, suppliedZero. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read zeroCorrectedValue. Use the output convention below.
Return observedValue-suppliedZero on a common measurement basis.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| observedValue | Observed Value | Required. Finite number. |
| suppliedZero | Supplied Zero | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| zeroCorrectedValue | Zero Corrected Value | Required. Finite number. |
{
"input": {
"observedValue": 5.2,
"suppliedZero": 0.2
},
"output": {
"zeroCorrectedValue": 5
}
}Limitations and assumptions
- This is one offset correction, not full calibration, gas-state conversion or a clinical result.
- 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 respiratory trace, acquisition protocol and reference-equation definition when interpreting a test. Keep gas-reference bases and supplied quality codes explicit; a zero subtraction, interval or counter discrepancy does not validate the complete measurement.
References
Similar or alternative tools
- Periodontal Probe Calibration Delta
Calculate a probe indication error and its opposite additive correction.
- Respiratory Gaslag Reference Factor Tool
Subtract a supplied bench transport lag and rescale time without estimating patient gas exchange.