The mnemonic
The 5 Ps
What each word stands for
- PPain, out of proportion and on passive stretch
- PPallor
- PParaesthesia
- PParalysis
- PPulselessness
Why it matters clinically
Needs urgent fasciotomy. Do not wait for all five signs.
Where it stops being reliable
Pulselessness and paralysis are late signs, and pulses are often present in compartment syndrome. Pain on passive stretch is the earliest reliable sign.
Teaching aid, still awaiting independent review. Confirm facts in a standard source.