Endoscopic Device Team Members Kieran Sweeney (Leader) Sara Worzella (Leader) Leah Brandon (Communications) Adam Budde (BSAC) Tom Knight (BWIG) Advisor Willis Tompkins, Ph.D. UW Dept. of Biomedical Engineering Client Ashley G. Anderson Jr., M.D. UW Dept. of Otolaryngology

OverviewOverview Problem Statement Background Operating Room Setup Designs Decision Matrix Future Work Questions

Problem Statement Endoscopes used to expedite and enhance sinus surgery –Endoscopes may ignite OR drapes if left unattended –Blood and fluid buildup on lens obstructs surgery Design scope caddy –Store & cool endoscope when idle –Simultaneously clean scope lens.

Background Information Endoscopic sinus surgery Removes obstructions that block natural drainage and are prone to infection Removes inflamed tissue and bone 2.36 million Nose, Mouth, and Pharynx Surgeries in 2003

Operating Room Setup Hand-held Equipment –Endoscope –Debrider with suction Video Monitors –Endoscope lens –3D mapping system Scrub Tech Tray Anesthesia Equipment

Operating Room Setup

Operating Room Traffic Jam Concerns Endoscope set on drapes can start a fire Cleaning pad ergonomically inefficient Cords become tangled, obstructive Seconds count

SurgerySurgery Clean Endoscope during surgery Reduced visibility due to blood contact during surgery

Previous Design: Holster Modeled much like a gun holster Scope tip stored in defogging solution Funneled entry for easy access Cleaning cloth held stationary near entrance Device ratchet clipped off patient’s shoulder

TestingTesting Used OR xenon based light source 8cc of glutaraldehyde based defogging solution in holster 30 min time interval to simulate OR environment Less than 3 º change in temperature Acted as heat sink

Original Prototype Deficiencies Construction needed several pieces Not fully testable - not easily sterilized - improper material

A very rigid material used (ABS) Too “blocky” Want smaller inner diameter of holster Original Prototype Deficiencies

2 nd Generation Prototype Increase funnel size for easier placement –Hemisphunnel™ –Provides large target –Still lies flat on patient Decrease material volume –Reduce wall thickness –Reduce cylinder diameter Relocate drape clips for increased stability Seamless, functional model Utilize same materials as mass-market production

Prototyping Manufacturing Preferences –Transition to Mass Production –Applicable Material –Good Aesthetics –Cost Effective –Functional –Testable

Prototyping Options Hand Construction –Mill and Lathe –Cost Effective –Time Consuming –Rough Prototype Machine Shop RP –Cost Effective –Good Aesthetics –No Material Options

Prototyping Options 3 rd Party Manufacturing –REDEYE (Rapid Prototyping) & Realize (Stereolithography) –Medical Grade Thermoplastics –Professional Aesthetics –High Cost –Confidentiality Concerns

Prototype Options Matrix OptionCostAesthetics Material RequirementsFunctionalityTotal Hand In- house RP rd Party RP

Future Work Refine prototype –Enhance design ergonomics –Make suitable for mass production Test final design in OR environment Research & pursue product patent Investigate mass production & distribution for endoscope caddy

Questions ?