Assessment of Tissue Damage due to Mechanical Stresses

t – While there are many benefits to minimally invasive surgery, force feedback, or touch sensation, is lacking in the currently available MIS tools, including surgical robots, creating the potential for excessive force application during surgery. The goal of this work was to develop a methodology with which to identify stress magnitudes and durations that can be safely applied with a grasper to different tissues, helping to improve MIS device design and reduce potential for clinically relevant consequences. Using the porcine model, stresses typically applied in MIS were applied to liver, ureter, and small bowel using a motorized endoscopic grasper. Acute indicators of tissue damage including cellular death, activation of the coagulation cascade, and infiltration of inflammatory cells were measured using histological and image analysis techniques. ANOVA and post-hoc analyses were used to detect stress magnitudes and durations that caused significantly increased tissue damage with the...

• Type: Journal
• Year: 2007
• Where: IJRR
• Authors: Smita De, Jacob Rosen, Aylon Dagan, Blake Hannaford, Paul Swanson, Mika N. Sinanan
• Keywords: Available Mis Tools, IJRR 2007, Small Bowel, Stress Magnitude