Long: Feeling for Failure: Haptic Force Perception of Soft Tissue Constraints in a Simulated Minimally Invasive Surgery Task

Feeling for Failure: Haptic Force Perception of Soft Tissue Constraints in a Simulated Minimally Invasive Surgery Task

A Dissertation Defense by Lindsay Long

Committee:
Drs. Chris Pagano (chair), Timothy Burg, Rich Pak, Ben Stephens

Details:
Thursday, July 18, 2013
Brackett 419
10:00 am

Abstract:
In minimally invasive surgery (MIS), the ability to accurately interpret haptic information and apply appropriate force magnitudes onto soft tissue is critical for minimizing tissue trauma. Force perception in MIS is a dynamic process in which the surgeon’s administration of force onto tissue results in useful perceptual information which guides further haptic interaction, and it is hypothesized that the compliant nature of soft tissue during force application provides biomechanical information denoting tissue failure. Specifically, the perceptual relationship between applied force and material deformation rate specifies the distance remaining until structural capacity will fail, or indicates Distance-to-Break (DTB). Two experiments explored the higher-order relationship of DTB in MIS using novice and surgeon observers. Findings revealed that observers could reliably perceive DTB in simulated biological tissues, and that surgeons performed better than novice observers. Further, through calibration feedback training, sensitivity to DTB can be improved. Implications for training effectiveness in MIS simulators are discussed.

Similar Posts (auto-generated):