Browsing by Author "Liu, Hueiming"
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Item Stroke care and collaborative academic research in Latin America(2022) Muñoz, Paula; González, Francisca; Urrutia, Francisca; Mazzon, Enrico; Navia, Víctor; Brunser, Alejandro; Lavados, Pablo; Olavarría, Verónica; Almeida, Juan; Guerrero, Rodrigo; Rojo, Alexis; Gigoux, Juan; Vallejos, José; Conejan, Nathalie; Esparza, Tomas; Escobar, Arturo; Soto, Álvaro; Pontes, Octavio; Arauz, Antonio; Abanto, Carlos; Carce, Cheryl; Zafra, Jessica; Liu, Hueiming; Song, Lili; Miranda, Jaime; Anderson, CraigObjective: A narrative overview of regional academic research collaborations to address the increasing burden and gaps in care for patients at risk of, and who suffer from, stroke in Latin America (LA). Materials and methods: A summary of experiences and knowledge of the local situation is presented. No systematic literature review was performed. Results: The rapidly increasing burden of stroke poses immense challenges in LA, where prevention and manage-ment strategies are highly uneven and inadequate. Clinical research is increasing through various academic consortia and networks formed to overcome structural, funding and skill barriers. However, strengthening the ability to generate, analyze and interpret randomized evidence is central to further develop effective therapies and healthcare systems in LA. Conclusions: Regional networks foster the conduct of multicenter studies -particularly randomized controlled trials-, even in resource-poor regions. They also contribute to the external validity of international studies and strengthen systems of care, clinical skills, critical thinking, and international knowledge exchange.Publication The main Optimal Post rTpa-Iv Monitoring in Ischemic Stroke Trial (OPTIMISTmain): Protocol for a Pragmatic, Stepped Wedge, Cluster Randomized Controlled Trial(2023) Ouyang, Menglu; Faigle, Roland; Wang, Xia; Johnson, Brenda; Summers, Debbie; Khatri, Pooja; Billot, Laurent; Liu, Hueiming; Malavera, Alejandra; Munoz Venturelli, Paula; Gonzalez, Francisca; Urrutia, Francisca; Day, Diana; Songa, Lili; Sui, Yi; Delcourt, Candice; Robinson, Thompson; Durham, Alice; Ebraimo, Ahtasam; Wan Asyraf Wan Zaidin; Jan, Stephen; Lindley, Richard; Urrutia, Victor; Anderson, CraigIntroduction Careful monitoring of patients who receive intravenous thrombolysis (IVT) for acute ischemic stroke (AIS) is resource-intensive, and potentially less relevant in those with mild degrees of neurological impairment who are at low-risk of symptomatic intracerebral hemorrhage (sICH) and other complications. \ Methods OPTIMISTmain is an international, multicenter, prospective, stepped wedge, cluster randomized, blinded outcome assessed trial aims to determine whether a less-intensity monitoring protocol is at least as effective, safe and efficient as standard post-IVT monitoring in patients with mild deficits post-AIS. Clinically-stable adult patients with mild AIS (defined by a NIHSS <10) who do not require intensive care within 2 hours post-IVT are recruited at hospitals in Australia, Chile, China, Malaysia, Mexico, UK, US and Vietnam. An average of 15 patients recruited per period (overall 60 patient participants) at 120 sites for a total of 7200 IVT-treated AIS patients will provide 90% power (one-sided α 0.025). The initiation of eligible hospitals is based on a rolling process whenever ready, stratified by country. Hospitals are randomly allocated using permuted blocks into 3 sequences of implementation, stratified by country and the projected number of patients to be recruited over 12 months. These sequences have four periods that dictate the order in which they are to switch from control (usual care) to intervention (implementation of low intensity monitoring protocol) to different clusters of patients in a stepped manner. Compared to standard monitoring, the low-intensity monitoring protocol includes assessments of neurological and vital signs every 15 minutes for 2 hours, 2 hourly (versus every 30 minutes) for 8 hours, and 4 hourly (versus every 1 hour) until 24 hours, post-IVT. The primary outcome measure is functional recovery, defined by the modified Rankin scale (mRS) at 90 days, a seven-point ordinal scale (0 [no residual symptom] to 6 [death]). Secondary outcomes include death or dependency, length of hospital stay, and health-related quality of life, sICH and serious adverse events. Conclusion OPTIMISTmain will provide Level I evidence for the safety and effectiveness of a low-intensity post-IVT monitoring protocol in patients with mild severity of AIS.