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Modular Retractor for Hip Replacement Surgery

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Modular Retractor for Hip Replacement Surgery - PowerPoint PPT Presentation


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Modular Retractor for Hip Replacement Surgery Department of Biomedical Engineering , Department of Electrical Engineering, Department of Mechanical Engineering, Vanderbilt University Sponsor : Dave Martinez , Dr. Michael Christie.

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Modular Retractor for Hip Replacement Surgery

Department of Biomedical Engineering, Department of Electrical Engineering, Department of Mechanical Engineering, Vanderbilt University

Sponsor: Dave Martinez, Dr. Michael Christie

Hassan Atassi (BME), AzniNabela Wahid (ME), Mohamed Osman (BME), NoorNazihaMohdLazim (BME/EE), Mohammad ZulfadhliZolkaffly (EE)

Purpose

Device Design

Problem Statement

Standard Hibbs

  • Create a proof of concept modular retractor (Hibbs) that incorporates:
  • Alterable handle length & blade depth
  • Interchangeable handle types and tips
  • Ergonomic handle
  • Adipose tissue accessory

Design a Modular Retractor to remove inefficiencies in the current retractor instrument in order to decrease the number of instruments needed in in hip replacement surgery as well as to make hip surgery more efficient and safer.

Modular retractor

Modular Retractor

Background

  • HIP REPLACEMENT SURGERY
  • Every year approximately 300,000 hip replacement surgeries occur in the United States. This number is expected to grow to 600,000 by 2015.
  • SURGICAL RETRACTOR
    • Used to Actively separates the edges of a surgical incision or wound to create a larger working area for the surgeon and limit incision size.
    • Available in variety of sizes and shapes: Choice depends surgeons training/ patient
  • PROBLEMS
  • Multiple versions of the same retractor needed to do the same job because of varying patient size.
  • Limited Size Permutations: never exact fit to patient size.
    • Decreased surgeon field of view (too large)
    • Ineffective & causes injury (too small)
  • Adipose tissue wraps around retractor making it inefficient.
  • Handle is uncomfortable to grasp during long surgery.
    • Average user changes hand position every 71 seconds

Safety & Costs

  • Safety Concerns
  • Protruding plunger could damage tissue
  • Small potential for components to unintentionally dislodge
  • CostLabor: Prototype = $860 (Quick Parts)Plunger= $29.76 (JW Winco)
  • Total Cost: 11,689.76

Adipose Accessory Attachment Mechanism

Plunger Locking Mechanism (JW Winco)

Acknowledgement

We would like to thank Dave Martinez, Dr. Michael Christie, Dr. Paul King, Dr. Joel Barnett, & St. Thomas Hospital for their support in the completion of this project.

Detachable Adipose Accessory

TOP: Longest , BOTTOM: Shortest

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