Development of an ontology for the description of crystallization experiments and results is proposed.

Background The role of ambulance services is shifting, due in part to more intermediate, non-urgent patients who do not require direct emergency department conveyance, yet who cannot be safely left at home alone. Evidence surrounding the safety, effectiveness and efficiency of alternate care routes is not well known. Methods This scoping review sought to identify all studies that examined alternate routes of care for the non-urgent “intermediate” patient, as triaged on scene. Search terms for the sample (ambulances, paramedics, etc.) and intervention (e.g. referrals, alternate care route, non-conveyance) were combined. Articles were systematically searched using four databases and grey literature sources (February 2020). Independent researchers screened title-abstract and full text stages. Results Of 16,037 records, 41 examined alternate routes of care after triage by the on-scene paramedic. Eighteen articles considered quantitative patient data, 12 studies provided qualitative perspectives while 11 were consensus or opinion-based articles. The benefits of alternative schemes are well-recognised by patients, paramedics and stakeholders and there is supporting evidence for a positive impact on patient-centered care and operational efficiency. Challenges to successful use of schemes included: patient safety resulting from incorrect triage decisions, inadequate training, lack of formal partnerships between ambulance and supporting services, and insufficient evidence to support safe implementation or continued use. Studies often inaccurately defined success using proxies for patient safety (e.g. decision comparisons, rates of secondary contact). Finally, patients expressed willingness for such schemes but their preference must be better understood. Conclusions This broad summary offers initial support for alternate routes of care for intermediate, non-urgent patients. Even so, most studies lacked methodologically rigorous evidence and failed to evaluate safe patient outcomes. Some remedies appear to be available such as formal triage pathways, targeted training and organisational support, however there is an urgent need for more research and dissemination in this area.

Ambulance clinicians using Pathfinders have demonstrated acceptable levels of sensitivity in identifying patients who require ED care. The actual impact of the tools in clinical practice will be dependent on the provision of suitable alternatives to ED.

Purpose With the increasing demand on ambulance services, paramedics are tasked to arrange as much out of hospital care as possible, to develop integrated systems of care and work with hundreds of different providers – all in the 15 minutes allocated for assessment. A UK ambulance trust is navigating and leading much of this work as one of the first trusts to implement a general practitioner referral policy as an alternate to direct conveyance. The paper aims to discuss this issue. Design/methodology/approach Here the authors discuss the referral scheme, examine the limited evidence available and discuss what is needed to influence prospective success of implementing this scheme in other trusts. Findings Limited evidence for these schemes are described, however there is a clear gap in critical appraisal and methodologically rigorous evidence needed to implement these schemes in other ambulance schemes. Originality/value In order to facilitate collaboration of healthcare services and to minimize the burden of increasing numbers of patients, communication and discussion of alternate routes of care is crucial. This viewpoint piece is one of the first to emphasize the potential benefits of such schemes.