← Critical-care EEG
RPP term construction and validity boundary
An RPP name combines one localization main term with one pattern-type main term, then adds applicable modifiers.
Criteria & assessment
- required components
- one main_term_1 localization
- one main_term_2 pattern type
- minimum run
- consecutive cycles min
- 6
- examples
- 1 Hz for 6 s
- 3 Hz for 2 s
- frequency boundary
- No RPP may have a typical frequency above 4 Hz. A pattern above 4 Hz lasting at least 0.5 s is outside this RPP contract; one shorter than 0.5 s is not an RPP.
- evolution boundary
- Within RPP terminology, evolution is limited to patterns at or below 4 Hz and shorter than 10 s. Longer evolving patterns and faster short patterns are delegated to the seizure/BIRD contracts.
Source · 2021ACNS critical-care EEG terminology · PDF p. 9 ↗
Generation & measurement notes
- Represent boundary handoffs as validation failures or external labels; do not derive seizure, BIRD, or IIC labels here.
Editorial draft · clinical review pending