Numeric delays are fixed within a case but differ between cases¶
A numeric's delay does not drift through a recording, but 40–70% of its variance lies between cases. One delay per case describes it; one delay for the whole dataset is wrong by up to about 2 s.
| Status | established: shown on many cases, with a control. |
| Devices | Solar8000 monitor, Primus anaesthesia machine |
| Variables | Solar8000 heart rate, Solar8000 ART and CVP numerics, Primus ETCO₂, PIP and RR |
What is done about it¶
Per-case delay labels (numeric_delay) with a standard error and a quality flag.
Evidence¶
| Study | Date | Status | Summary |
|---|---|---|---|
| Numeric delays are fixed within a case, different between cases | 2026-10-12 | current | With each numeric's algorithm held fixed, delays were fitted for every case and every 30-minute block. They do not drift within a case, but 40–70% of their variance lies between cases, so a single population delay is wrong by up to 2 s for HR and 1 s for the others. Each case gets its own delay label. |