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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

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Retractor for Breast Surgery

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  1. 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

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

  3. 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.

  4. 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)

  5. 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

  6. 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

  7. 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

  8. Design 1 – The Raisin’ • Squeeze handle • Actuates ratchet mechanism • Quick release

  9. Pros Wide base Easily adjusted Minimally obstructed field of view Cons No pivot Bulky handle Difficult to clean Design 1 – The Raisin’

  10. Design 2 – The Spreader • Twist knob • Pivot point at base • Large angle spread

  11. 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

  12. Design 3 – The Jack • Pull top bar back • Lift up • Slide forward

  13. Pros Used with various procedures Simple design Easy to manufacture/clean Cons Instability No pivot point Obstructs field of view Design 3 – The Jack

  14. Design Matrix

  15. Future Work • Determine method of construction • Create prototype • Test for sufficient force, light, and suction distribution • Revise design if needed

  16. 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

  17. Questions

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