Friday, December 30, 2011

Fine Needle Aspiration Cytology


·         Preparation
o   stop NSAIDS 1 week before the procedure
o   suspend anticoagulant drugs
o   No foods few hours before the procedure
o   Investigations –
§  FBC
§  Clotting profile
o   Antibiotic prophylaxis
·         Instruments
o   22 to 25 gauge needles
o   10 or 20 ml syringes (+/- "pistol-grip" device)
·         Procedure
o   +/- topical local anesthetic (1% lidocaine) 
o   minimum of two passes be made into various portions of the nodule to decrease sampling error
o   Slides are rapidly fixed and stained
o   Other slides are air dried and fixed in alcohol
o   Cell blocks
o   Slides sent to cytopathologist with clinical and examination findings


Fine Needle Aspiration – 23-25 G needle
Large Needle Biopsy – 16 -18 G needle
Core Needle Biopsy – 14 G needle

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