The Los Angeles Prehospital Stroke Screen (abbreviated LAPSS) is a method of identifying potential stroke patients in a pre-hospital setting.
[1] If all of the above criteria are met (or not ascertainable) the LAPSS is positive for stroke.
Patients may still be experiencing a stroke even if LAPSS criteria are not met.
With correction for the 4 documentation errors, positive predictive value increased to 97% (95% CI, 84% to 99%).
"[3] In a Chinese study, Beijing paramedics using the protocol, completed LAPSS screenings in an average of 4.3±3.0 minutes (median, 5 minutes).