Laparoscopic Banding Device

Client: Dr. Thomas M. Julian, M.D.Advisor: Mitch Tyler

Leader/BSAC: Gina StuessyBWIG: 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

  Scrunchie Pressure Cuff Metal CoilLow Risk to Tube (1-10) 8   8  9Material Inertness (1-10) 9   9  7Simplicity of Use (1-5)

4 2 5Total(3-25)  21 19   21

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

http://www.acmicorp.com/acmi/user/display.cfm

http://ccli.org/nfp/contraception/tubal.php

www.tubal-reversal.net www.youtube.com

Questions

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