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Retractor for Breast Surgery Clients: Dr. Piasecki ~ Plastic Surgery UW Hospital Dr. Gutowski ~ Plastic Surgery UW Hospital Advisor: Prof. Murphy ~ Biomedical Engineering Department UW-Madison Christopher Westphal – Leader Sarajane Stevens – Communicator Arinne Lyman – BSAC

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Retractor for breast surgery l.jpg

Retractor for Breast Surgery

Clients: Dr. Piasecki ~ Plastic Surgery UW Hospital

Dr. Gutowski ~ Plastic Surgery UW Hospital

Advisor: Prof. Murphy ~ Biomedical Engineering Department UW-Madison

Christopher Westphal – Leader

Sarajane Stevens – Communicator

Arinne Lyman – BSAC

Eric Bader – BWIG


Overview l.jpg
Overview

  • Problem Statement

  • Design Constraints

  • Background

    • Procedure

    • Current Device

    • Light/Suction

  • Designs

  • Future Work


Problem statement l.jpg
Problem Statement

  • Our goal is to develop a breast retractor that will allow the doctor to create a cavity in the breast through a small inframammary incision. The retractor must be self-standing, contain a light source that emits light in all directions, and create suction in various places of the breast cavity.


Design constraints l.jpg
Design Constraints

  • Self-standing

  • Proper light and suction distribution

  • Fit through a 3-4 cm incision

  • Sustain a maximum force of 60 lb

  • Non-porous material

  • Withstand autoclaving temps (121°C)


Background procedure l.jpg

http://rejuven8u.com/plasticsurgery/breast_augmentation_surgery_info.htmlhttp://rejuven8u.com/plasticsurgery/breast_augmentation_surgery_info.html

Background – Procedure

  • 3 cm incision

  • Retractor holds tissue up

  • Form cavity with electrocautery tool

  • Implant placed above or below pectoralis

  • Closed with dissolvable sutures


Current device l.jpg
Current Devicehttp://rejuven8u.com/plasticsurgery/breast_augmentation_surgery_info.html

  • ASSI® Breast Retractors

    • Fiber optic light source

    • Suction source

    • “C” or “L” shape

  • Neon Breast Retractor

    • Light reflective polymers

    • Distributed light

    • Lightweight

    • Insulated

    • One-time use

http://www.accuratesurgical.com/accuratesurgical/Docs/breast_instrumentation/retractors/stanger.asp

http://www.sheffmed.com/neonret.htm


Background light suction l.jpg

Light Sourceshttp://rejuven8u.com/plasticsurgery/breast_augmentation_surgery_info.html

Fiber optics

Light reflective polymers

LightMat™

Suction Sources

Standard hospital wall mount

20-120 mmHg

http://www.lumitex.com/medical.html

http://www.buyemp.com/product/1012001.html

Background – Light/Suction


Design 1 the raisin l.jpg
Design 1 – The Raisin’http://rejuven8u.com/plasticsurgery/breast_augmentation_surgery_info.html

  • Squeeze handle

  • Actuates ratchet mechanism

  • Quick release


Design 1 the raisin9 l.jpg

Proshttp://rejuven8u.com/plasticsurgery/breast_augmentation_surgery_info.html

Wide base

Easily adjusted

Minimally obstructed field of view

Cons

No pivot

Bulky handle

Difficult to clean

Design 1 – The Raisin’


Design 2 the spreader l.jpg
Design 2 – The Spreaderhttp://rejuven8u.com/plasticsurgery/breast_augmentation_surgery_info.html

  • Twist knob

  • Pivot point at base

  • Large angle spread


Design 2 the spreader11 l.jpg

Proshttp://rejuven8u.com/plasticsurgery/breast_augmentation_surgery_info.html

Dog-legged for minimal obstruction

Light-weight

Pivot creates taller cavity

Cons

Hard to adjust

May exert pressure on patient

Non-discrete step increments

Design 2 – The Spreader


Design 3 the jack l.jpg
Design 3 – The Jackhttp://rejuven8u.com/plasticsurgery/breast_augmentation_surgery_info.html

  • Pull top bar back

  • Lift up

  • Slide forward


Design 3 the jack13 l.jpg

Proshttp://rejuven8u.com/plasticsurgery/breast_augmentation_surgery_info.html

Used with various procedures

Simple design

Easy to manufacture/clean

Cons

Instability

No pivot point

Obstructs field of view

Design 3 – The Jack


Design matrix l.jpg
Design Matrixhttp://rejuven8u.com/plasticsurgery/breast_augmentation_surgery_info.html


Future work l.jpg
Future Workhttp://rejuven8u.com/plasticsurgery/breast_augmentation_surgery_info.html

  • Determine method of construction

  • Create prototype

  • Test for sufficient force, light, and suction distribution

  • Revise design if needed


References l.jpg
Referenceshttp://rejuven8u.com/plasticsurgery/breast_augmentation_surgery_info.html

  • http://medevoice.co.uk/sheffmed/January05.php

  • http://www.accuratesurgical.com/accuratesurgical/Docs/breast_instrumentation/retractors/stanger.asp

  • http://rejuven8u.com/plasticsurgery/breast_augmentation_surgery_info.html

  • http://www.lumitex.com/medical.html

  • http://www.buyemp.com/product/1012001.html


Questions l.jpg
Questionshttp://rejuven8u.com/plasticsurgery/breast_augmentation_surgery_info.html


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