BACKGROUND: Despite evidence of effectiveness, most US hospitals do not deliver hospital-based addictions care. ECHO (Extension for Community Healthcare Outcomes) is a telementoring model for providers across diverse geographic areas. We developed and implemented a substance use disorder (SUD) in hospital care ECHO to support statewide dissemination of best practices in hospital-based addictions care. OBJECTIVES: Assess the feasibility, acceptability, and effects of ECHO and explore lessons learned and implications for the spread of hospital-based addictions care. DESIGN: Mixed-methods study with a pre-/post-intervention design. PARTICIPANTS: Interprofessional hospital providers and administrators across Oregon. INTERVENTION: A 10-12-week ECHO that included participant case presentations and brief didactics delivered by an interprofessional faculty, including peers with lived experience in recovery. APPROACH: To assess feasibility and acceptability, we collected enrollment, attendance, and participant feedback data. To evaluate ECHO effects, we used pre-/post-ECHO assessments and performed a thematic analysis of open-ended survey responses and participant focus groups. KEY RESULTS: We recruited 143 registrants to three cohorts between January and September 2019, drawing from 32 of Oregon's 62 hospitals and one southwest Washington hospital. Ninety-six (67.1%) attended at least half of ECHO sessions. Participants were highly satisfied with ECHO. After ECHO, participants were more prepared to treat SUD; however, prescribing did not change. Participants identified substantial gains in knowledge and skills, particularly regarding the use of medications for opioid use disorder; patient-centered communication with people who use drugs; and understanding harm reduction as a valid treatment approach. ECHO built a community of practice and reduced provider isolation. Participants recognized the need for supportive hospital leadership, policies, and SUD resources to fully implement and adopt hospital-based SUD care. CONCLUSIONS: A statewide, interprofessional SUD hospital care ECHO was feasible and acceptable. Findings may be useful to health systems, states, and regions looking to expand hospital-based addictions care.

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OBJECTIVES The authors investigated ideal acoustic conditions on a clinical scanner custom-programmed for ultrasound (US) cavitation-mediated flow augmentation in preclinical models. We then applied these conditions in a first-inhuman study to test the hypothesis that contrast US can increase limb perfusion in normal subjects and patients with peripheral artery disease (PAD).BACKGROUND US-induced cavitation of microbubble contrast agents augments tissue perfusion by convective shear and secondary purinergic signaling that mediates release of endogenous vasodilators.METHODS In mice, unilateral exposure of the proximal hindlimb to therapeutic US (1.3 MHz, mechanical index 1.3) was performed for 10 min after intravenous injection of lipid microbubbles. US varied according to line density (17, 37, 65 lines) and pulse duration. Microvascular perfusion was evaluated by US perfusion imaging, and in vivo adenosine triphosphate (ATP) release was assessed using in vivo optical imaging. Optimal parameters were then used in healthy volunteers and patients with PAD where calf US alone or in combination with intravenous microbubble contrast infusion was performed for 10 min. RESULTSIn mice, flow was augmented in the US-exposed limb for all acoustic conditions. Only at the lowest line density was there a stepwise increase in perfusion for longer (40-cycle) versus shorter (5-cycle) pulse duration. For higher line densities, blood flow consistently increased by 3-fold to 4-fold in the US-exposed limb irrespective of pulse duration. High line density and long pulse duration resulted in the greatest release of ATP in the cavitation zone.Application of these optimized conditions in humans together with intravenous contrast increased calf muscle blood flow by >2-fold in both healthy subjects and patients with PAD, whereas US alone had no effect.CONCLUSIONS US of microbubbles when using optimized acoustic environments can increase perfusion in limb skeletal muscle, raising the possibility of a therapy for patients with PAD.

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