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Emergency department flow Calculator
Track waits, walk-outs and length of stay in the emergency department.
Operations & supply chainHealthcare
How it's worked out
- LWBS = left without being seen ÷ arrivals. Four-hour = left within 4 h ÷ arrivals
- One month
NoteThe four-hour measure is the NHS England standard; the national target has been 95%, with interim targets lower. Use the target your system sets.
Source: NHS England four-hour standard; CMS ED measures
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