Nonmagnetic Rigid and Flexible Outer Sheath with Pneumatic Interlocking Mechanism for Minimally Invasive Surgical Approach

We developed a nonmagnetic rigid and flexible outer sheath with pneumatic interlocking mechanism using flexible toothed links and a wire-driven bending distal end. The outer sheath can be switched between rigid and flexible modes easily depending on surgical scenes, and the angle of its distal end can be controlled by three nylon wires. All components of flexible parts are made of MRI-compatible nonmagnetic plastics. We manufactured the device with 300-mm long, 16-mm outer diameter, 7-mm inner diameter and 90-mm bending distal end. Holding power of the device in rigid mode was maximum 3.6 N, which was sufficient for surgical tasks in body cavity. In vivo experiment using a swine, our device performed smooth insertion of a flexible endoscope and a biopsy forceps into reverse side of the liver, intestines and spleen with a curved path. In conclusion, our device shows availability of secure approach of surgical instruments into deep cavity.

[1]  Pierre Hellier,et al.  Level Set Methods in an EM Framework for Shape Classification and Estimation , 2004, International Conference on Medical Image Computing and Computer-Assisted Intervention.

[2]  N. Hata,et al.  MRI‐compatible manipulator with remote‐center‐of‐motion control , 2008, Journal of magnetic resonance imaging : JMRI.

[3]  Ron Kikinis,et al.  Medical Image Computing and Computer-Assisted Intervention — MICCAI 2002 , 2002, Lecture Notes in Computer Science.

[4]  Ken Masamune,et al.  Multi-DOF Forceps Manipulator System for Laparoscopic Surgery , 2000, MICCAI.

[5]  Dominiek Reynaerts,et al.  A miniature manipulator for integration in a self-propelling endoscope , 2000 .

[6]  R.H. Sturges,et al.  A Flexible, Tendon-Controlled Device for Endoscopy , 1991, Proceedings. 1991 IEEE International Conference on Robotics and Automation.

[7]  Nobuhiko Hata,et al.  Handheld Laparoscopic Forceps Manipulator Using Multi-slider Linkage Mechanisms , 2004, MICCAI.

[8]  Branislav Jaramaz,et al.  Medical Image Computing and Computer-Assisted Intervention – MICCAI 2000 , 2000, Lecture Notes in Computer Science.

[9]  Keiji Sasaki,et al.  Remote Microsurgery System for Deep and Narrow Space - Development of New Surgical Procedure and Micro-robotic Tool , 2002, MICCAI.

[10]  J. L. Herder,et al.  Forces and displacements in colon surgery , 2002, Surgical Endoscopy And Other Interventional Techniques.

[11]  Yoshihiko Nakamura,et al.  Shape-memory-alloy active forceps for laparoscopic surgery , 1995, Proceedings of 1995 IEEE International Conference on Robotics and Automation.

[12]  Lasse Riis Østergaard,et al.  Active Surface Approach for Extraction of the Human Cerebral Cortex from MRI , 2006, MICCAI.

[13]  H. Choset,et al.  Percutaneous Intrapericardial Interventions Using a Highly Articulated Robotic Probe , 2006, The First IEEE/RAS-EMBS International Conference on Biomedical Robotics and Biomechatronics, 2006. BioRob 2006..

[14]  Russell H. Taylor,et al.  High Dexterity Snake-Like Robotic Slaves for Minimally Invasive Telesurgery of the Upper Airway , 2004, MICCAI.

[15]  Ken Masamune,et al.  Rigid-Flexible Outer Sheath Model Using Slider Linkage Locking Mechanism and Air Pressure for Endoscopic Surgery , 2006, MICCAI.