Laparoscopic Banding Instrument Dr. Thomas M. Julian – Client Professor Mitch Tyler – Advisor Kailey Feyereisen – Team leader Tyler Witt – BSAC Gina Stuessy – Communications Anna Moeller – BWIG

Abstract This semester our team improved our design of a device for laparoscopic banding that would be less traumatic and more reliable than current devices used by surgeons. We completed preliminary testing on the mechanisms involved and are now working on constructing a 2X larger model to test the feasibility of the design.

Background Tubal ligation is a permanent form of birth control in women “Tubes Tied” Eggs are prevented from reaching the uterus Laparoscopic surgery Procedure reversible, but difficult One million performed a year

Current Products Procedures vary Banding is good option Pomeroy, banding, clipping Banding is good option Non-electrical Easier to reverse Product used is currently from ACMI Falope Ring Band® Tears Tube Fails to release rubber bands properly

Tube is drawn inside of device with pinchers Rubber band is then pushed off the end and the tube is released

Problem Statement Our client asked us to design a laparoscopic banding device for tubal sterilization that is less cumbersome, traumatic, and inaccurate than the device he currently uses.

Design Suction Mechanism Band Release Gentler on fallopian tube Secure hold during band release Band Release Threaded knob releases bands more accurately Resorbable separator between bands to ensure proper release

Design 3D CAD Model

Design Spring Mechanism Threaded Knob Controlled insertion/removal of syringe Threaded Knob Controlled release of bands

Design Pros Cons Increased user control Compatible with currently available instruments (i.e. trochan, bands, band loader) Familiar design Meets client requirements Cons Some learning of instrument function necessary Ease of band loading not addressed

Testing Suction Mechanism Tested on sleep fallopian tube to determine pressure needed to secure tube Kailey

Future Work Decide and order final materials Delrin tubing Radel (poly) Aluminum Stainless Steel Begin constructing smaller prototype Design instrument to ease band loading Test band release of final prototype Acquire FDA approval Kailey Delrin Round Stock Radel Medical Instrumentation

Conclusion This design has promise to be less traumatic, more reliable, and easier to use than the current devices on the market. In the following months we will construct the device to scale and test on vessel or fallopian tissue. Kailey

References http://www.acmicorp.com http://ccli.org/nfp/contraception/tubal.php http://www.tubal-reversal.net http://www.youtube.com http://www.alamocitypb.com http://www.professionalplastics.com

Questions?