Description
Measure signed start-minus-end dialysis-session mass change.
Renal records distinguish spot/daily reporting, urine/plasma units, indexed versus absolute results and session-relative sampling. A label for an indexed value does not perform body-area scaling, while session mass change differs from verified fluid removal. Source definitions and clinical context remain necessary for interpretation.
Measure signed start-minus-end dialysis-session mass change.
When to use this tool
Use Dialysis Start End Weight Difference when you already have startKilograms, endKilograms and need to measure signed start-minus-end dialysis-session mass change.
How to use the tool and how it works
- Enter startKilograms, endKilograms. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read startMinusEndKilograms. Use the output convention below.
Require nonnegative start/end kilograms; return start-end kg.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| startKilograms | Start Kilograms | Required. Finite number; minimum 0. |
| endKilograms | End Kilograms | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| startMinusEndKilograms | Start Minus End Kilograms | Required. Finite number. |
{
"input": {
"startKilograms": 75,
"endKilograms": 73
},
"output": {
"startMinusEndKilograms": 2
}
}Limitations and assumptions
- The difference does not establish fluid removal, volume status, a target mass or an appropriate treatment adjustment.
- 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
Check the original collection, laboratory and session records before combining values. Apply a complete validated measurement or calculation method when conversion beyond the stated units or reference labels is required; do not infer renal function from a local record helper.
References
Similar or alternative tools
- Dialysis Actual Session Duration
Separate dialysis-session elapsed time from active time after interruptions.
- Dialysis Access Record Side
Attach a recorded side label to a dialysis-access identifier.