The National Institutes of Health (NIH), through the National Heart, Lung, and Blood Institute (NHLBI), is offering a funding opportunity titled "Catalyze: Product Definition Device Prototype Design and Testing." This initiative aims to provide early-stage translational support for the development and testing of device prototypes, diagnostic disease target identification, and assay development specifically for heart, lung, blood, and sleep (HLBS) diseases. The funding opportunity follows a phased approach, consisting of R61 and R33 stages, with a total annual funding allocation of up to $6.3 million to support approximately 13 new awards each year, while non-Federal matching contributions are expected for the R33 phase. Applications must be submitted by December 20, 2024, and will undergo a peer-review process to evaluate scientific merit and relevance, with no funding available for clinical trials. For further inquiries, interested applicants can contact the NIH OER Webmaster at OERWebmaster03@od.nih.gov.