Pelvic Osteolysis: Evacuation and Filling
Felicia Shay
Computer Integrated Surgery II
Checkpoint Presentation
Plan of Action
• Project Description/Deliverables
• Project Plan
• Key Dates
• Progress to Date
• Design
• Problems Encountered/Solved
• Dependencies
Project Description
• ID material/potential
• Plan for tool design
• Explore Options
• Evaluate
• Build tools
• Testing
Deliverables
Minimal:
• Research and documentation of potential material
– Tools
– Filling
• Potential tool design with evaluations and considerations
• Bone filler material and analysis of potential material
Expected:
• Prototyping of instrument and filling
• Modeling and evaluation of each
• Potential integration and mechanism for whisking, evacuation and filling
Maximal:
• Integration with robot
Background and Constraints
• Physiologically• Problem • In the material:
– Biocompatibility– Flexibility to access the material
• In the shape of lesion• In the design and tools needed:
– Need for suction and irrigation– Feasibility
Plan of Action
• Project Description/Deliverables
• Project Plan
• Key Dates
• Progress to Date
• Design
• Problems Encountered/Solved
• Dependencies
Action
• 1.0 Communication • 2.0 Research
– 2.1 Tool– 2.2 Osteolysis– 2.3 Filler
• 3.0 Optimal design• 4.0 Implementation • 5.0 Integration and Testing• 6.0 Documentation
Key Proposed Dates
• 2.22.01 Official Start Date• 3.1.01 Meetings scheduled/attended and research on
potential evacuation and filler material• 3.8.01 Research weight bearing material• 3.15.01 Read papers, begin brainstorming on designs,
purchase material and background reading.• 3.22.01 Model different designs and evaluate according to the
constraints theoretically• 4.7.01 Begin prototyping and testing of different size tubing
and wires with tool constraint, filling• 4.14.01 Evaluating different prototypes based on evaluation
methods• 5.1.01 Completion of project and documentation
Progress to Date
• 2.22.01 Official Start Date• 3.1.01 Meetings scheduled/attended and research on
potential evacuation and filler material• 3.8.01 Research weight bearing material• 3.15.01 Read papers, begin brainstorming on designs,
purchase material and background reading.• 3.22.01 Model different designs and evaluate according to the
constraints theoretically• 4.7.01 Begin prototyping and testing of different size tubing
and wires with tool constraint• 4.14.01 Evaluating different prototypes based on evaluation
methods• 5.1.01 Completion of project and documentation
Revised Dates
• 2.22.01 Official Start Date• 3.1.01 Meetings scheduled/attended and research on
potential evacuation and filler material• 3.8.01 Research weight bearing material• 3.15.01 Read papers, begin brainstorming on designs,
purchase material and background reading.• 3.22.01 Model different designs and evaluate according to the
constraints theoretically• ?????? Begin prototyping and testing of different size tubing
and wires with tool constraint• Evaluating different prototypes based on evaluation methods• Completion of project and documentation
Relevant Papers
• Yang, F., Wu, K.H., Pu, Z. J. “The Effect of Strain Rate and Sample Size Effects on the Superelastic Behavior of Superelastic Alloys” Proceedings of the Second International Conference on Shape Memory and Superelastic Technologies. (CA) 1997, p 23-28.
• Berg, B. “Twist and Stretch: Combined Loading of Pseudoelastic NiTi Tubing” Proceedings of the Second International Conference on Shape Memory and Superelastic Technologies. (CA) 1997, 443-448.
• Ueki, T., Mogi, H., Horikawa, H. “Torsion Property of Ni-Ti Superelastic Alloy Thin Tubes” Proceedings of the Second International Conference on Shape Memory and Superelastic Technologies. (CA) 1997, 467-472.
• Yang, Jianhua. “Fatigue Characterization of Superelastic Nitinol”. Proceedings of the Second International Conference on Shape Memory and Superelastic Technologies. (CA) 1997, 479-484.
Considerations
• Torque• Repeat cycling (Compression/Tension)
– Strain Rate – Fatigue
• Angulation to gain access to site• Room for tools and evacuation• Tight fit vs Loose fit• Range of Motion
Twist Stretch: Combined Loading of Psuedoelastic NiTi Tubing
Stress Load
(M Pa)
Unload
(M Pa)
Strain Calculation
Torsion Wire 379.2 172.4 (O.D.)(Angle rotation)/(2L)
Tube 296.5 144.8 (O.D.)(Angle rotation)/(2L)
Bend Wire 896.4 482.6 (O.D.)(Angle rotation)/(2L)
Tube 579.5 262.0 (O.D.)(Angle rotation)/(2L)
Affects of Pathway in Tubing
• Considerations:– Irrigations and Suction
• Tight fit– I.e. catheter
• Spacers– Irrigation and Suction considerations– Trajectory
Progress Status
• Problems– Integration with robot
• Needs more design +collaboration
– Accessing tiny locations• Visible under fluoroscopy• Small end manipulators• Problems
– Addressing all considerations and constraints