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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

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
Overview
  • Problem Statement
  • Design Constraints
  • Background
    • Procedure
    • Current Device
    • Light/Suction
  • Designs
  • Future Work
problem statement
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
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

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
Current Device
  • 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
Light Sources

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
Design 1 – The Raisin’
  • Squeeze handle
  • Actuates ratchet mechanism
  • Quick release
design 1 the raisin9
Pros

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
Design 2 – The Spreader
  • Twist knob
  • Pivot point at base
  • Large angle spread
design 2 the spreader11
Pros

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
Design 3 – The Jack
  • Pull top bar back
  • Lift up
  • Slide forward
design 3 the jack13
Pros

Used with various procedures

Simple design

Easy to manufacture/clean

Cons

Instability

No pivot point

Obstructs field of view

Design 3 – The Jack
future work
Future Work
  • Determine method of construction
  • Create prototype
  • Test for sufficient force, light, and suction distribution
  • Revise design if needed
references
References
  • 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
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