Joint Mechanics

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Cadaveric models of the shoulder evaluate discrete motion segments using the glenohumeral joint in isolation over a defined trajectory. The aim of this study was to design, manufacture and validate a robotic system to accurately create 3D upper body motion and capture it them using high speed motion cameras.

In particular, we intended to use the robotic system to simulate the normal throwing motion in an intact cadaver. The robotic system consists of a lower frame (to move the torso) and an upper frame (to move an arm) using seven actuators. The actuators accurately reproduced planned trajectories. The marker setup used for motion capture was able to determine the six degrees of freedom of all involved joints during the planned motion of the end effector.

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Relevant Publications: 24, 28, 36, 38, 39

Wound Stasis

Severe high energy and penetrating trauma can result in acute shock and death. Emergent care at the scene is essential for optimal outcome prior to surgical care, as uncontrolled bleeding can result in death; contamination can result in infection; and inadequate skeletal stabilization of extremity wounds can result in continued soft tissue injury. In some scenarios, such as trauma sustained in military injuries, in rural or wilderness settings, or in any other setting with delayed rescue, emergent surgical care may not be available for hours or at times days after the traumatic event. 

To address these scenarios, we hypothesize that the development of a reversible hydrogel-based foam as a portable system for emergent hemostasis of abdominal wounds, local analgesia, disinfection and supplemental soft tissue stabilization will provide better and faster accessibility to initial care at the scene of injury than present standards.

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