Objective(s): The complexity of aortic arch reconstruction due to diverse 3-dimensional geometrical abnormalities is a major challenge. This study introduces 3-dimensional printed tissue-engineered ...vascular grafts, which can fit patient-specific dimensions, optimize hemodynamics, exhibit antithrombotic and anti-infective properties, and accommodate growth. Methods: We procured cardiac magnetic resonance imaging with 4-dimensional flow for native porcine anatomy (n = 10), from which we designed tissue-engineered vascular grafts for the distal aortic arch, 4 weeks before surgery. An optimal shape of the curved vascular graft was designed using computer-aided design informed by computational fluid dynamics analysis. Grafts were manufactured and implanted into the distal aortic arch of porcine models, and postoperative cardiac magnetic resonance imaging data were collected. Pre- and postimplant hemodynamic data and histology were analyzed. Results: Postoperative magnetic resonance imaging of all pigs with 1:1 ratio of polycaprolactone and poly-L-lactide-co-ε-caprolactone demonstrated no specific dilatation or stenosis of the graft, revealing a positive growth trend in the graft area from the day after surgery to 3 months later, with maintaining a similar shape. The peak wall shear stress of the polycaprolactone/poly-L-lactide-co-ε-caprolactone graft portion did not change significantly between the day after surgery and 3 months later. Immunohistochemistry showed endothelization and smooth muscle layer formation without calcification of the polycaprolactone/poly-L-lactide-co-ε-caprolactone graft. Conclusions: Our patient-specific polycaprolactone/poly-L-lactide-co-ε-caprolactone tissue-engineered vascular grafts demonstrated optimal anatomical fit maintaining ideal hemodynamics and neotissue formation in a porcine model. This study provides a proof of concept of patient-specific tissue-engineered vascular grafts for aortic arch reconstruction.
In Vietnam where alcohol use is culturally normative and little treatment is available, persons living with HIV (PLWH) who consume alcohol at unhealthy levels are at greatly increased risk for ...negative health outcomes. We describe the first systematic adaptation of 2 evidence-based alcohol interventions for use in Vietnam: a combined motivational enhancement therapy/cognitive behavioral therapy and a brief alcohol intervention. Using the situated information, motivation and behavioral skills model, and systematic procedures for tailoring evidence-based treatments, we identified core intervention content to be preserved and key characteristics to be tailored for relevance to the clinical setting. We describe the use of in-depth interviews with antiretroviral treatment clients and providers, expert input, and counselor training procedures to develop tailored manuals for counselors and clients. Adapting evidence-based alcohol treatments for global settings is facilitated by the use of a model of behavior change and systematic procedures to operationalize the approach.
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