Improved Fine Needle Aspiration Biopsy Team: Janie Goldsworthy, Kristi Hinner, Nick Kortan, Crystal Marshek Client: Dr. Elizabeth Burnside Advisor: John Webster

Problem Statement GOAL: To modify the needle used during a Fine Needle Aspiration (FNA) procedure. The modification should not drastically change the FNA procedure and still increase the amount of tissue removed for cytological testing. It should also minimize the time (by collecting an adequate sample size on the first attempt) and discomfort caused to the patient during the procedure.

What is FNA? Technique used to extract cells; no incision needed Several insertions are usually required to ensure an adequate sample size Samples are sent to pathologist to be analyzed National Breast Cancer Center,

Fine Needle Aspiration (FNA) A.D.A.M.,

Product Design Specifications Removes adequate number of cells for diagnosis. Should not cause more discomfort than current FNA procedure. Constrained to standard gauge needle, client prefers 23-gauge.

Micro-Drill Bit Insert Draws cells up drill fluting into needle Fits inside 23-gauge needle Outer Diameter: inches Currently too short Length: approximately 1 inch Needs to be lengthened Easy to obtain

Needle Manufacturer Drill Bit Contacts Responses Work in Progress

ME Shop/Process Welding Soldering Brazing

Sample Size Comparison Old vs. New Techniques Histological analysis Cell Quantification

Testing Tissues Available Future Testing

Future Work Prototype development Research into appropriate materials to be used (stainless steel, Co-Cr, Ti) Develop protocol for quantifying testing Test on tissue similar to breast tissue Quantify sample needed for cytological evaluation