ADAPTABLE RETRACTOR FOR

TOTAL HIP REPLACEMENT

SURGERY

Trey DeLong

Lacey Gorochow

Brian Rappa

Adam Vandergriff

Sandra Wadeer

Problem Statement Current tissue retractors are narrow, multiple

retractors are required especially in obese patientsNY times reports 34% adults are obese+Surgical Techs($20.00/hr*2-4hr/surgery*200k

surgeries/year)Time of surgery increases as well

Previous team designed an adjustable retractor Complex and impractical for industrial productionPrototype could not be used in surgery

Adaptor Design Requirements Must fit multiple patient sizes and

provide a clear view of the surgical site Must be cost efficient Must function adequately in the surgical

procedure

Primary Objective Design a modular adaptor for retractors that:

Keeps back adipose tissue

Is easy to attach to retractor

Is simple to manufacture

Is ready for use in surgery

Preliminary Design

Wing-like structure

Attachment mechanism:Hook and slot

Tapering method

Form by bending metal

Goals

Reduce total hip replacement surgery costLess personnel in the operating roomLess retractors needed for surgery

Increase vision and work room for the surgeonIncrease efficiency of the surgeryReduce surgery time

Design Parameters

Easy to use Small size Simple design- easy to manufacture Lightweight Smooth Biocompatible- stainless steel Curve/size of modular adaptor

Performance Metrics

Retractor attachment work on 95% of patientsDifferent size attachments

CostsKeep production costs minimalPredicted to be ~$300 for retractor and

attachments

System and Environment Role in surgery

Increase view of region and allows access Why its beneficial to the surgeon

Reduce people near patientReduce number of retractorsMake surgery easier

Testing Methods

Verification Validation Hardware Testing Stress Testing

Pro/E Mechanical Analysis Safety Testing

Next Steps…

Visit Surgery

Design Sketches

3 Pro/E Design Options

Final Pro/E Design

Prototype Completed

Complete Testing/Surgery Use

Presentation

6/21

8/10

9/29

11/18

1/72/2

64/1

76/6

Start Date

Completed

Remaining

References

http://www.bls.gov/bls/blswage.htm http

://www.innomed.net/hip_rets_mis.htm#Anchor-APC-49575

http://www.nytimes.com/2010/01/14/health/14obese.html

http://www.orthosupersite.com/view.aspx?rid=1889

http://www.zimmer.com/z/ctl/op/global/action/1/id/8140/template/PC/navid/10427