Bronchoalveolar Lavage Trap Elise Larson, Ali Johnson, Kim Kamer, Laura Zeitler BME 201 March 6, 2009

Client: Dr. Christopher Green Dept. of Pediatrics School of Medicine and Public Health Advisor: Prof. Brenda Ogle Dept. of Biomedical Engineering

Overview Bronchoalveolar lavage Specimen trap problems Client requirements Possible prototype designs Future work Acknowledgments & References

Bronchoalveolar Lavage (BAL) Diagnostic procedure Alveolar hemorrhage Malignancies Infections Especially for immuno- compromised patients Equipment/Materials Bronchoscope Vacuum and light sources Saline solution Specimen trap www.nytimes.com

Problem and Current Solutions Trap is free-hanging Risk losing sample Current Solutions Tape trap to scope Nurses can hold it

Design Proposal Improve the current trap design to allow manipulation of the bronchoscope without losing the sample. Specifications Plastic Must hold a 35 mL sample Volume gradations Cost effective (<$10) Durable (40 kPa vacuum pressure)

Design Option 1: Fixed Long Distance Pros Cost effective Simple Feasible Cons Unlikely to be accepted Out of view Not necessarily universal to Light Source Vacuum, Trash Trap, Specimen Trap to Patient

Design Option 2: Ball-and-Socket Frame Pros Reusable Universal Cons Less likely to be accepted Cumbersome High prototype cost 8

Design Option 3: Ball in Cage Valve Attachment to original trap

Ball in Cage Valve Pros Cons Universal Likely to be implemented Not cumbersome Cons Prototype cost Difficult to make 10

Design Matrix Weight Design Aspects Fixed Long distance Ball-and-socket Ball in Cage 0.05 Prototype Cost 8 4 6 0.2 Mass Production Cost/ Procedure 9 5 Continuity 3 10 User Friendly Feasibility 7 Acceptability among M.D.s Dependability Cumbersome 1 TOTAL 6.9 7.6 8.4 Scale: 1 – 10 (1 poor, 10 excellent)

Future Works Determine design details Order materials Assemble prototype Extensive testing and adaptation Finalize prototype

Acknowledgements References Christopher Green, MD Professor Ogle Prakash, Udaya, Mehta, Atul, Shepherd Wes.  "The Art of Bronchoscopy." Bronchoscopy International: Art of Bronchoscopy, an Electronic On-Line Multimedia Slide Presentation http://www.bronchoscopy.org/ppt-art/AB-2A/AB-2a_files/frame.htm Dugdale, D.C., Medoff, B. “Bronchoscopy.” Medline Plus. Nov 4, 2008. Viewed on Feb 1, 2009. http://www.nlm.nih.gov/medlineplus/ency/article/003857.htm

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