Laparoscopic Banding Device Client: Dr. Thomas M. Julian, M.D. Advisor: Mitch Tyler Leader/BSAC: Gina Stuessy BWIG: Kailey Feyereisen Communications: Anna Moeller

Outline  Problem Statement  Background  Current Products  Product Design Specifications  Design Alternatives  Decision Matrix  Future Work

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

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 Pomeroy, banding, clipping  Banding is good option because 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

Product Specifications  Single use  Sterile and inert  Accurate with a failure rate less than 20%  Less than $400 per device

Scrunchie Design  Suction grabs tube  Fingers extend and band is secured on device  Band is released when fingers close around tube

Scrunchie: Pros and Cons Advantages  Vacuum is less traumatic than current device  Band releases more reliably Disadvantages  Construction may be difficult which could lead to higher production costs  Tubes may still be torn

Pressure Cuff Design  Mechanism to grab the tube  Pressure cuff that inflates to larger volume Puts pressure to pinch tube Slides off rubber band with conical shape

Pressure Cuff: Pros and Cons Advantages  Gentler way of pinching tube  Simple for rubber band to come off  Fewer mechanical parts Disadvantages  High pressure in cuff could be dangerous  Cannot load multiple bands at once  New handle for surgeon to learn  Difficult to get the tube into the cuff

 Stretched out memory metal coils  Positioned underneath fallopian tube  Released to coil around & pinch off tube Metal Coil Design

Metal Coil: Pros and Cons Advantages  Stress to fallopian tube is less  Design simplicity Disadvantages  Material may be less inert  Method different from current product

Decision Matrix ScrunchiePressure CuffMetal Coil Low Risk to Tube (1-10)8 8 9 Material Inertness (1- 10)9 9 7 Simplicity of Use (1-5) 425 Total (3-25)

Future Work  Discuss with client  Finalize the design Decide internal mechanisms Decide materials  Order materials  Construct prototype  Begin preliminary testing on non- human materials

References  r/display.cfm  bal.php  

Questions ?