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Improved Design for Fine-Needle Aspiration (FNA) of Breast Cancer Lesions. Alissa Garman Janie Goldsworthy Kristi Hinner Nick Kortan Client: Elizabeth Burnside Advisor: John Webster Midsemester Presentation March 7, 2003. Problem Statement. - PowerPoint PPT Presentation
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Improved Design for Improved Design for Fine-Needle Aspiration (FNA) of Fine-Needle Aspiration (FNA) of
Breast Cancer Lesions Breast Cancer Lesions
Alissa GarmanAlissa GarmanJanie GoldsworthyJanie Goldsworthy
Kristi HinnerKristi HinnerNick KortanNick Kortan
Client: Elizabeth BurnsideClient: Elizabeth BurnsideAdvisor: John WebsterAdvisor: John Webster
Midsemester Presentation March 7, 2003Midsemester Presentation March 7, 2003
Problem StatementProblem Statement
GOAL:GOAL: To modify the needle used during a To modify the needle used during a Fine Needle Aspiration (FNA) procedure. Fine Needle Aspiration (FNA) procedure. The modification should not drastically The modification should not drastically change the FNA procedure and still change the FNA procedure and still increase the amount of tissue removed for increase the amount of tissue removed for cytological testing. It should also minimize cytological testing. It should also minimize the time (by collecting an adequate sample the time (by collecting an adequate sample size on the first attempt) and discomfort size on the first attempt) and discomfort caused to the patient during the procedurecaused to the patient during the procedure. .
What is FNA?What is FNA?
Technique used to Technique used to extract cells; no extract cells; no incision neededincision neededSeveral insertions are Several insertions are usually required to usually required to ensure an adequate ensure an adequate sample sizesample sizeSamples are sent to Samples are sent to pathologist to be pathologist to be analyzedanalyzed
National Breast Cancer Center, http://www.NBCC.org
Fine Needle Aspiration (FNA)
A.D.A.M., http://www.adam.com
Product Design SpecificationsProduct Design Specifications
Removes adequate number of cells for Removes adequate number of cells for diagnosis.diagnosis.
Should not cause more discomfort than Should not cause more discomfort than current FNA procedure.current FNA procedure.
Constrained to standard 20-25-gauge Constrained to standard 20-25-gauge needle, client prefers 23-gauge.needle, client prefers 23-gauge.
Current PrototypeCurrent Prototype
Pre-manufactured Pre-manufactured
drill bitdrill bit
6” length6” length
Fits in 23 gauge Fits in 23 gauge needleneedle
Bead on shaft of drill Bead on shaft of drill bit to allow for ease bit to allow for ease
of turning during cell of turning during cell collectioncollection
Tissues TestedTissues Tested
Fixed cat tissues (Last semester)Fixed cat tissues (Last semester)– MammaryMammary– LymphLymph– FatFat
Fresh tissue Fresh tissue – Mouse Mouse
mammary mammary tumor (cystic)tumor (cystic)
Testing Procedures (Fresh Tissue)Testing Procedures (Fresh Tissue)
Old techniqueOld technique– No insert usedNo insert used– Performed one trial on the mouse tumorPerformed one trial on the mouse tumor
New techniqueNew technique– Drill bit insert usedDrill bit insert used– Performed one trial on the mouse tumorPerformed one trial on the mouse tumor
Observed in saline bath under microscopeObserved in saline bath under microscope
Prepared slides and sent to lab for evaluationPrepared slides and sent to lab for evaluation
Sample QuantificationSample Quantification
Old techniqueOld technique– Resulted in a small Resulted in a small
amount of tissue amount of tissue
New techniqueNew technique– Roughly five times Roughly five times
as much tissue as much tissue collected using drill collected using drill bitbit
Slide PreparationSlide Preparation
Two methodsTwo methods1.1. Air-dry methodAir-dry method
- Place sample on slide and smear using a second - Place sample on slide and smear using a second slideslide
- Results in two identical slides- Results in two identical slides- Stain with Methanol Blue type stain- Stain with Methanol Blue type stain
2.2. ThinPrep methodThinPrep method- Place sample in vile of ThinPrep solution- Place sample in vile of ThinPrep solution- Slide prepared using ThinPrep machine in lab- Slide prepared using ThinPrep machine in lab- $8.00/vile - $8.00/vile
Sample SlidesSample Slides
Benign FNA Cell Sample
Sample SlidesSample Slides
Malignant FNA Cell Samples
Future WorkFuture Work
Test on more freshly sacrificed mouse Test on more freshly sacrificed mouse tumorstumorsHave slides evaluated by pathologistHave slides evaluated by pathologistIn vivoIn vivo testing of mouse tumors- testing of mouse tumors- will will require protocol amendmentrequire protocol amendmentFurther prototype developmentFurther prototype developmentDevelop protocol for quantifying testingDevelop protocol for quantifying testingContinued research on independent Continued research on independent cytopathological evaluationcytopathological evaluation