Real Time Estimator to Perform Targeted Biopsies With a Free-Wrist Robot Despite Large Deformations of the Insertion Orifice

Abstract

In the context of keyhole surgery, and more particularly of uterine biopsy, the fine automatic movements of a surgical instrument held by a robot with 3 active DOF’s require an exact knowledge of the point of rotation of the instrument. However, this center of rotation is not fixed and moves during an examination. This paper deals with a new method of detecting and updating the interaction matrix linking the movements of the robot with the surgical instrument. This is based on the method of updating the Jacobian matrix which is named the “Broyden method”. It is able to take into account body tissue deformations in real time in order to improve the pointing task for automatic movements of a surgical instrument in an unknown environment.

Review on Needle Insertion Haptic Simulation

“…This is for example the case for epidural anesthesia [78] or ventricular puncture [79] where the main metric of gesture mastery focuses on the interpretation of haptic sensations called "overshoot" [80][81][82]. Another example is prostate or uterine biopsy, where the main metric is the reached position [83,84]. It is important to note that new automatic metric extraction methods are increasingly developed to address this issue [85].…”