A Comparative Study of Various Needle Gauges in Diagnostic Fine Needle Aspiration Cytology

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Professor, Consultant Pathologist, American Board Certified Pathologist, Fellow College of American Pathologists. Areas of interest Fine Needle Aspiration Cytology, Cytology, Cancer, Ethics, Islam, Humanity

A Comparative Study of Various Needle Gauges in Diagnostic Fine Needle Aspiration Cytology

Anwar Ul Haque and Ambreen Moatasim
Department of Pathology, Pakistan Institute of Medical Sciences, Islamabad.
Objective: To compare various needle gauges (23, 24 and 29) in diagnostic accuracy in aspiration of cytology.
Design: A comparative- cross-sectional study.
Setting: Islamabad Institute of Pathology & Pakistan institute of medical sciences, Islamabad
Subjects: 33 cases with six Fine Needle aspiration Cytology (FNAC) aspirates on each; two each by using 23, 24 butterfly
needle and 29 gauge insulin syringe needles
Results: With 23-gauge needle, definite diagnosis without any difficulty was reached in 16 (48.5%) cases, a definite
diagnosis with some difficulty in 10 (30.3%) cases, a probable diagnosis in 4 (12.1%) and no definite diagnosis in 3 (9.1%)
cases. With 24- gauge butterfly needle definitive diagnosis reached in 12 (36.4%), a definite but difficult diagnosis in
14(42.4%), probable in 3 (9.1%), and no diagnosis in 4 (12.1%). Finally, with 29- gauge a definite diagnosis was possible in
18 (54.5%) cases while there were 5 (15%) cases each. in all other categories i.e. definite but with some difficulty, probable
and no diagnosis. The P-value was .377
Conclusion: There was no statistical difference among various gauge needles. Since the finer needle the needle better it is,
the thinnest needle i.e. 29-gauge needle seems to be the most appropriate needle for routine use in superficially located
masses.

         

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