Outcome from large vessel occlusion stroke can be significantly improved by time-critical thrombectomy but treatment is only available in regional comprehensive stroke centres (CSCs). Many patients are first admitted to a local primary stroke centre (PSC) and require transfer to a CSC, which delays treatment and decreases the chance of a good outcome. Access to thrombectomy might be improved if eligible patients could be identified in the prehospital setting and selectively redirected to a CSC. This study is evaluating a new specialist prehospital redirection pathway intended to facilitate access to thrombectomy.

This study is a multicentre cluster randomised controlled trial with included health economic and process evaluations. Clusters are ambulance stations (or teams) which are work bases for ambulance practitioners. Intervention allocated ambulance practitioners use the Specialist PrE-hospital rEDirection for ischaemic stroke thrombectomY (‘SPEEDY’) pathway which comprises initiation according to specific criteria followed by contact with CSC staff who undertake a remote assessment to select patients for direct CSC admission. Control allocated ambulance practitioners continue to provide standard care which comprises admission to a local PSC and transfer to a CSC for thrombectomy if required. A co-primary outcome of thrombectomy treatment rate and time from stroke symptom onset to thrombectomy treatment will evaluate the impact of the pathway. Secondary outcomes include key aspects of emergency care including prehospital/hospital time intervals, receipt of other treatments including thrombolysis, and performance characteristics of the pathway. A broad population of all ambulance practitioner suspected and confirmed stroke patients across participating regions is being enrolled with a consent waiver. Data about SPEEDY pathway delivery are captured onto a study case record form, but all other data are obtained from routine healthcare records. Powered on a ‘primary analysis population’ (ischaemic stroke patients with pathway initiation criteria), 894 participants will detect an 8.4% difference in rate and data from 564 thrombectomy procedures will detect a 30 minute difference in time to treatment. The full study population is estimated to be approximately 80 000. Regression modelling will be used to examine primary and secondary outcomes in several analysis populations. The economic analyses will include cost-effectiveness and cost–utility analyses, and calculation of willingness to pay at a range of accepted threshold values. The process evaluation involves semi-structured interviews with professionals and patient/family members to explore views and experiences about the SPEEDY pathway.

This study has ethical, Health Research Authority and participating NHS Trust approvals.

Dissemination of study results will include presentations at national and international conferences and events, publication in peer-reviewed journals, and plain English summaries for patient/public engagement activities.

ISRCTN77453332.

To explore multiprofessional views about system-wide factors influencing (impeding or facilitating) the delivery of stroke mechanical thrombectomy (MT) services and/or improvements to this pathway in England.

A pragmatic exploratory qualitative study using online focus groups and semi-structured interviews with National Health Service (NHS) professionals and those working in a stroke strategic/policy lead role. We thematically analysed the data using the Framework Approach to understand participants’ views on the challenges to improving current and future MT implementation.

NHS trusts and other key stroke strategic/policy organisations covering 10 geographical regions in England and a national perspective.

A total of 29 professionals, working in an NHS clinical and managerial position and/or a stroke strategic national/regional clinical/policy lead role, participated in five focus groups and six individual semi-structured interviews between April and June 2024.

We identified five themes relating to MT implementation progress and challenges (1) workforce, (2) clinical care pathways, (3) service/system, (4) cross-cutting theme: communications and (5) cross-cutting theme: culture. Our analysis emphasised the increasing complexity and inter-related factors shaping the emergency stroke pathway for MT provision and a need to acknowledge key people-related, organisational and sociocultural factors during service planning.

Despite the challenges and complexity, professionals were optimistic that further progress would be made with MT delivery in England. However, ongoing improvement strategies are required, which also acknowledge wider cultural factors and system-wide relationships and are not just focused on care pathways and resources.