Checkpoint Presentation Shayer Chowdhury Project #3 Mentors: Dr. Gyusung Lee, Dr. Mija Lee.

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Presentation transcript:

Checkpoint Presentation Shayer Chowdhury Project #3 Mentors: Dr. Gyusung Lee, Dr. Mija Lee

 Current state: Lack of a cheap, effective, and reusable blood vessel dissection phantom for robotic surgery training  Goal: Create a comprehensive inanimate surgical training model for sharp/blunt dissection and blood vessel electrosurgery

 Discussion with surgeons at MISTIC ◦ Dr. Lee was able to get me in touch with three surgeons ◦ Emphasized in both blunt/sharp surgery and electrosurgery simulation, option of keeping “tissue” opaque or transparent to obscure or display location of blood vessels ◦ In blunt/sharp simulation, focus on tissue to behave realistically in terms of resisting dissection ◦ In electrosurgery, focus on conductivity of gel and blood vessels, shrinking of blood vessel at high heat, and if possible, coagulation of “blood” inside vessel

 Cotton stuffing to simulate dissectible tissue and rubber bands to simulate blood vessels  Cheap and reusable  Strings/thread used as barriers and obstacles to maneuver around

 Cotton stuffing, rubber bands, string/thread, and plastic bowls are inexpensive, recyclable lab materials that can be bought in bulk  Model exercises main concepts of blunt/sharp dissection ◦ Cotton stuffing displays elastic/spring-like properties while being cut and moved around ◦ String/thread obstacles prevent haphazard dissection  Simple to construct and reuse ◦ Cutting does not permanently damage cotton, so can be reused and replaced easily

 Aiming to make model more sophisticated while keeping cost at a minimum ◦ Prototype is fairly crude, but serves its purpose ◦ Approximate cost currently at less than $10, which is the goal  Thickness and texture of cotton not exactly representative of human tissue ◦ Looking into more synthetic material that better mimics tissue, but is still easily reusable

 Test out model and receive feedback from surgeons’ evaluations ◦ Additional dependency: availability of surgeons will be dependent on their schedule; evaluation of models may take longer than expected ◦ May push back April 1 st date of expected deliverables accordingly  Continue search for more cheap, synthetic, and realistic material to replace or enhance cotton stuffing

 3mm silicone rubber tubing segments embedded in “gelatin from porcine skin” from Sigma-Aldrich  Tubing shrinks at temperatures higher than 100°C  Relatively cheap and easy to make

 Rubber tubing simulates shrinking of blood vessels when high temperature is applied  Approximate cost is $30 per unit ◦ Tubing can be bought for cheap off of amazon.com; gel purchased through Sigma-Aldrich ◦ Much cheaper than current models, which run up to $75-80  Gelatin-based gel is potentially reusable ◦ Described as having properties such that it can be re- melted at high enough temperatures  Simple to make in a basic lab environment

 Rubber tubing and gelatin gel have low conductivity ◦ Searching for a more conductive blood vessel and tissue phantom  While much cheaper than current models, still fairly expensive ◦ Goal is still less than $10 per unit, but will try to get as close as possible  Reusability of gel is questionable ◦ Even if it can be re-melted at high enough temperatures, will need to accommodate by placing phantom in a metal dish and ensuring that tubing doesn’t shrink concurrently

 Search for a more conductive gel and rubber tubing material while maintaining realistic and reusable properties  Have model tested and evaluated by practicing surgeons then update using their feedback  Still haven’t figured out a way to model coagulation ◦ Once rubber tubing choice is ascertained, can work on coagulation

 Additional dependency of relying on availability of surgeons to evaluate according to their schedule ◦ Access to surgeons is possible, but may need to adjust schedule  Extending expected deliverable date of April 1 st to TBD, according to surgeon availability  Crude blunt/sharp prototype ready for evaluation  Electrosurgery model still needs improvement before evaluation

Questions? Comments?