Widener University 3 articles published in JoVE Bioengineering Investigating Stress-relaxation and Failure Responses in the Trachea Anita Singh1, Tanmay Majmudar2,3, Adi Iyer4, Diya Iyer4, Sriram Balasubramanian3 1Department of Biomedical Engineering, Widener University, 2Drexel University College of Medicine, 3School of Biomedical Engineering, Science and Health Systems, Drexel University, 4Rosetree Media School District The present protocol determines the tensile stress-relaxation and failure properties of porcine tracheae. Results from such methods can help improve the understanding of the viscoelastic and failure thresholds of the trachea and help advance the capabilities of computational models of the pulmonary system. Bioengineering A Reliable Porcine Fascio-Cutaneous Flap Model for Vascularized Composite Allografts Bioengineering Studies Victor Pozzo1,2,4, Golda Romano1,2,4, Marion Goutard1,2,4, Elise Lupon1,2,4, Pierre Tawa1,2,4, Aylin Acun3,4,5, Alec R. Andrews2, Corentin B. Taveau1,2,4,6, Basak E. Uygun1,2,3,4, Mark A. Randolph1,2,4, Curtis L. Cetrulo1,2,4, Alexandre G. Lellouch1,2,4,6 1Division of Plastic and Reconstructive Surgery, Massachusetts General Hospital, Harvard Medical School, 2Vascularized Composite Allotransplantation Laboratory, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, 3Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, 4Shriners Hospital for Children, 5Department of Biomedical Engineering, Widener University, 6Service de Chirurgie Plastique, Hôpital Européen Georges Pompidou, Assistance Publique-Hôpitaux de Paris (APHP), Université Paris Descartes The present protocol describes the porcine fascio-cutaneous flap model and its potential use in vascularized composite tissue research. Bioengineering Methods for In Vivo Biomechanical Testing on Brachial Plexus in Neonatal Piglets Anita Singh1, Rachel Magee1, Sriram Balasubramanian2 1Department of Biomedical Engineering, Widener University, 2School of Biomedical Engineering, Science and Health Systems, Drexel University Presented here are methods to perform in vivo biomechanical testing on brachial plexus in a neonatal piglet model.