Self-Contained Endoscopic Video Camera Client: Robert J. Hardie, DVM Advisor: Willis Tompkins, Ph.D. Team Richard Bamberg - Team Leader Chelsea Wanta - BWIG Dustin Gardner - Communications Matt Kudek - BSAC

Outline Background Problem Statement Design Constraints Design Ideas Design Matrix Future Work

Background Endoscopic Surgery Minimally invasive surgery Performed through small incisions Uses rigid endoscope and long-handled instruments www.vetmed.lsu.edu/images/endoscopy%202.jpg  

Background (cont.) Rigid endoscopes Series of stacked lenses within a rod Contain optical fibers for light transmission Often used in conjunction with camera system http://www.corexcel.com/rw/html/body_endoscopes_page1.htm

Background (cont.) Limitations Cannot evaluate conditions post-operatively without additional trauma Need anesthesia to insert and manipulate endoscope Fixed position limits field of view

Competition Pill Cam™ (ESO, SB, COLON) (1) Steerable segmented endoscope Fiber optic endoscope (2) Wireless endoscopic camera Deflectable endoscope HeartLander (3) 1 http://www.popsci.com/files/imagecache/ article_image_large/files/articles/hiw_gutcam_485.jpg 2 http://www.websites.medmatrix.com/ proscopesystems/used-flexible-endoscopes.jpg   3 http://www.medgadget.com/ archives/img/3433TEC.jpg

Problem Statement Self-contained, maneuverable endoscopic video camera system Maintained internally for periodic post-operative viewing Deft orientation without compromising visual capacity Reduce invasive procedures (1 less port) For UW-Veterinary Hospital (small animals)

Design Specifications The device must: • Be completely gas sterilizable • Be utilized during / following surgical procedure • Be easily withdrawn from patient • Contain light and power sources

Design Specifications (cont.) The device must: • Be built within a $500 budget • Transmit data wirelessly • Capture images comparable to current laparoscopes

Motorized Head How It Works Rigid body with flexible tip Camera tip adjustable from outside the body cavity Viewing angle ≥ 180°

Motorized Head Advantages Easy to adjust while in place Large viewing angle Disadvantages Must be re-inserted for post-operative viewing

Puppeteer How It Works Flexible cords provide stability Pulling a cord changes the viewing angle Different-sized cords allow for multiple curves

Puppeteer How It Works Flexible cords provide stability Pulling a cord changes the viewing angle Different-sized cords allow for multiple curves

Puppeteer Advantages Able to navigate around obstructions Easy to adjust while held in place Disadvantages Curving takes up more space Must be re-inserted for post-op viewing

Magnetically Coupled Resembles small dome security camera Dome filled with an inert gas Device completely inserts into patient’s body Magnetically maneuvered outside patient’s body Can be sutured into place Store/Transmit data wirelessly Cleaning mechanism for external ‘dome’ required

Magnetically Coupled Advantages Disadvantages No sharp edges on device Easy to maneuver Allows for wide viewing angle from camera Disadvantages Device may need additional support besides magnet Difficult to fit all necessary components into the dome If in place too long, too strong of a magnet could cause pain/tissue damage

Design Matrix Post-Operative Viewing Ability (30pts) Feasibility of Construction (25pts) Sterilization and Maintenance (25pts) Deliverability (10pts) Cost Total (100pts) Mechanical Head System 20 22 17 6 4 69 Puppeteer System 3 15 13 2 37 Magnetic Couple System 28 19 24 10 8 89

Future Work Final Design Mechanism: Magnetic Couple System Sutured Camera – Dock Station Proposed Design Mechanism: Individual battery source (rechargeable) LEDs installed on camera (light source) Self-cleansing system in vivo (clear image)

Usability Testing Tests to run for designed mechanism: Insertion and Extraction trials (Reliability) Maneuverability testing in vivo (Accuracy) Electronics testing (Imaging/Power source) Sterilization testing (Safety Protocol)

Questions??