View source for SIRPID (Stimulus Induced Rhythmic, Periodic, or Ictal Discharges)

New nomenclature for SIRPID is: Stimulus-Induced (SI)Rhythmic Delta Activity (RDA) or Stimulus-Induced Generelized Periodic Discharges (GPD), dependent of the pattern of the discharges. <ref>ACNS STANDARDIZED ICU EEG NOMENCLATURE v. 2012</ref>

==Background==
* Stimulus Induced Rhythmic, Periodic, or Ictal Discharges (SIRPID)
* Due to cortical and subcortical brain damage (thalamo-cortical dysfunction)
* Often seen after acute brain injury (around 75%)
* Discharges are induced by a tactile stimulus, i.e. touch or pain. 

==Clinic==
* In critically ill patients
* 50% has (sub)clinical seizures. 
* Risk factor for development of status epilepticus. 

==EEG==
* Encephalopatic background EEG
* Rhythmic delta discharges after a stimulus, i.e. pain. 
* Generalized or focal discharges. 
* Lasting seconds to hours



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'''''Generalized SIRPIDs after pain stimulus (blue line) (Average) '''''
[[File:SIRPID-3.png|border|none|1200px|left]]


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'''Notes'''
<references/>