EMS utilization predictors in a Mobile Integrated Health (MIH) program

Mobile integrated health-community paramedicine programs' effect on emergency department visits: An exploratory meta-analysis

INTRODUCTION

Mobile Integrated Health Community Paramedicine (MIH-CP) programs are designed to increase access to care and reduce Emergency Department (ED) and Emergency Medical Services (EMS) usage. Previous MIH-CP systematic reviews reported varied interventions, effect sizes, and a high prevalence of biased methods. We aimed to perform a meta-analysis on MIH-CP effect on ED visits, and to evaluate study designs' effect on reported effect sizes. We hypothesized biased methods would produce larger reported effect sizes.

METHODS

We searched Pubmed, Embase, CINAHL, and Scopus databases for peer-reviewed MIH-CP literature from January 1, 2000, to July 24, 2021. We included all full-text English studies whose program met the National Associations of Emergency Medical Technicians definition, reported ED visits, and had an MIH-CP related intervention and outcome. We established risk ratios for each included study through interpreting the reported data. We performed a random-effects and cumulative meta-analysis of ED visit data, tests of heterogeneity, and a moderator analysis to assess for factors influencing the magnitude of observed effect.

RESULTS

We identified 16 studies that reported ED visit data and included 12 in our meta-analysis. All studies were observational; 3 used matched controls, 6 pre-post controls, and 3 without controls. 7 studies' intervention were diversion/triage while 5 studies intervened with health education/home primary care services. Pooled risk ratio for our data set was 0.56 (95% confidence interval 0.42-0.74). Cumulative meta-analysis revealed that as of 2018 MIH-CP programs began to show consistent reductions in ED visits. Significant heterogeneity was seen among studies, with I-squared >90%. Moderator analysis showed reduced heterogeneity for matched-control studies.

CONCLUSION

Our data revealed MIH-CP programs were associated with a reduced risk of ED visits. Study design did not have a statistically significant influence on effect size, though it did influence heterogeneity. We would recommend future studies continue to use high levels of control to produce reliable data with lower heterogeneity.

Process improvement using telemedicine consultation to prevent unnecessary interfacility transfers for low-severity blunt head trauma

OBJECTIVE

Mild traumatic brain injuries (MTBI) associated with intracranial haemorrhage are commonly transferred to tertiary care centres. Recent studies have shown that transfers for low-severity traumatic brain injuries may be unnecessary. Trauma systems can be overwhelmed by low acuity patients justifying standardisation of MTBI transfers. We sought to evaluate the impact of telemedicine services on mitigating unnecessary transfers for those presenting with low-severity blunt head trauma after sustaining a ground level fall (GLF).

METHOD

A process improvement plan was developed by a task force of transfer centre (TC) administrators, emergency department physicians (EDP), trauma surgeons and neurosurgeons (NS) to facilitate the requesting EDP and the NS on-call to converse directly to mitigate unnecessary transfers. Consecutive retrospective chart review was performed on neurosurgical transfer requests between 1 January 2021 and 31 January 2022. A comparison of transfers preintervention and postintervention (1 January 2021 to 12 September 2021)/(13 September 2021 to 31 January 2022) was performed.

RESULTS

The TC received 1091 neurological-based transfer requests during the study period (preintervention group: 406 neurosurgical requests; postintervention group: 353 neurosurgical requests). After consultation with the NS on-call, the number of MTBI patients remaining at their respective ED's with no neurological degradation more than doubled from 15 in the preintervention group to 37 in the postintervention group.

CONCLUSION

TC-mediated telemedicine conversations between the NS and the referring EDP can prevent unnecessary transfers for stable MTBI patients sustaining a GLF if needed. Outlying EDPs should be educated on this process to increase efficacy.

A Systematic Review of Methodologies and Outcome Measures of Mobile Integrated Health-Community Paramedicine Programs

INTRODUCTION

Mobile integrated health-community paramedicine (MIH-CP) uses patient-centered, mobile resources in the out-of-hospital environment to increase access to care and reduce unnecessary emergency department (ED) usage. The objective of this systematic review is to characterize the outcomes and methodologies used by MIH-CP programs around the world and assess the validity of the ways programs evaluate their effectiveness.

METHODS

The PubMed, Embase, CINAHL, and Scopus databases were searched for peer-reviewed literature related to MIH-CP programs. We included all full-length studies whose programs met the National Association of Emergency Medical Technicians definition, had MIH-CP-related interventions, and measured outcomes. We excluded all non-English papers, abstract-only, and incomplete studies.

RESULTS

Our initial literature review identified 6434 titles. We screened 178 full-text studies to assess for eligibility and identified 33 studies to include in this review. These 33 include four randomized controlled trials, 17 cohort studies, eight 8 case series, and four 4 cross-sectional studies. Of the 29 non-randomized trials, five used matched controls, 13 used pre-post, and 11 used no controls. Outcomes measured were hospital usage (24 studies), ED visits (15), EMS usage (23), patient satisfaction (8), health-related outcomes (8), and cost (9). Studies that evaluated hospital usage reported one of several outcome measures: hospital admissions (11), ED length of stay (3), and hospital readmission rate (2). EMS usage was measured by ambulance transports (12) and EMS calls (10). Cost outcomes observed were ambulance transport savings (7), ED visit savings (4), hospital admission savings (3), and cost per quality-adjusted life year (2).

CONCLUSION

Most studies assessing MIH-CP programs reported success of their interventions. However, significant heterogeneity of outcome measures and varying quality of study methodologies exist among studies. Future studies designed with adequately matched controls and applying uniform core metrics for cost savings and health care usage are needed to better evaluate the effectiveness of MIH-CP programs.

Evaluation of an EMS-based community paramedic pilot program to reduce frequency of 9-1-1 calls among high utilizers

Background - Many community paramedic interventions aim to reduce unnecessary emergency department visits among high utilizers of acute care, but fewer focus specifically on reducing summons for emergency medical services (EMS). We implemented an EMS-based pilot program that identified high utilizers of 9-1-1 and facilitated community paramedic outreach encounters to understand and address potentially unnecessary 9-1-1 calls. This study compares the pre- and post-intervention incidence rate of 9-1-1 calls among program participants.Methods - This retrospective evaluation was conducted using pilot data from a single U.S. EMS agency that responds to approximately 100,000 9-1-1 calls annually. High utilizers, defined as individuals with ≥3 9-1-1 calls in 90 days, were identified for recruitment between February 1, 2019 and December 31, 2019. community paramedics recruited participants via phone and then conducted home visits to assist them with navigation away from unnecessary 9-1-1 use. Dispatch data from September 1, 2018 to December 31, 2019 were used to compute the incidence rate of 9-1-1 calls per 30 person-days of observation before and after the initial home visits.Results - Data from 108 program participants were analyzed. The majority were over the age of 50 (79%), and 33% completed more than one visit. Median person-days of observation before and after the initial home visit were 354 days and 132 days, respectively. Participants called 9-1-1 an average of 0.68 times per 30 person-days prior to the community paramedic intervention, and 0.51 times per 30 person-days after the intervention, which represents an overall mean decrease in 9-1-1 utilization of 25% (p < 0.001). Although a decrease in 9-1-1 utilization was observed in the majority of participants, the 9-1-1 call rate increased in 29% of participants. No statistically significant changes in 9-1-1 use were observed in participants who received more than one home visit or who were in the highest quartile of 9-1-1 use prior to the intervention.Conclusion - This pilot work demonstrates the feasibility of an EMS-based, community paramedic-only intervention to reduce unnecessary 9-1-1 calls and suggests that some modest reductions in EMS use may be achievable by dispatching community paramedics to conduct home visits with frequent users of 9-1-1.