A long, thin-bladed, probe-pointed knife for slitting open a fistula. SYN: fistula knife, syringotome. [fistula + G. tome, a cutting]
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fis·tu·la·tome (fisґtu-lə-tōm) [fistula + -tome] an instrument for incising a fistula; called also syringotome.Medical dictionary. 2011.