Table 1.

Characteristics of the three models tested

Model AModel BModel C
AST comprising consultants, middle grades, advanced care practitioners and specialist nursesAST present from 8am to 5pm, OOH stroke assessment by medical or ED staffAST present from 8am to 5pm, OOH stroke assessment by medical or ED staffAST present from 8am to 8pm, OOH stroke assessment by medical or ED staff
Ambulance pre-alerts8am to 5pm8am to 5pm8am to 8pm
Decision to enter patient into the MT assessment pathwayAST WH and in consultation with the network / remote stroke consultant OOHAST WH and in consultation with the network / remote stroke consultant OOHAST WH and in consultation with the network / remote stroke consultant OOH
CTA interpretation and reportingIn-house radiologist WH and in-house or outsourced radiologist OOHIn-house radiologist WH and network / remote stroke consultant OOHIn-house radiologist or AST WH and network / remote stroke consultant OOH
Referral to NSCVia hospital switchboard WH and OOHVia mobile phone hotline WH and OOHVia mobile phone hotline WH and OOH
Ambulance call category for transfer to NSC 15Ad hoc (usually category 3)Ad hoc (usually category 3)Category 2 (average response time 18 minutes)
  • AST = acute stroke team; CTA = computed tomography angiography; MT = mechanical thrombectomy; NSC = neuroscience centre; OOH = out of hours; WH = within hours (8am to 5pm or 8am to 8pm).