In medical terminology,“-graph”refers to aninstrument used to record(or produce a record), while“-gram”refers to therecord/image produced, and“-graphy”refers to theprocess of recording. This set is frequently tested because the terms look similar. Example: anelectrocardiographis the instrument; anelectrocardiogram (ECG/EKG)is the tracing produced;electrocardiographyis the act of recording. The distractors are surgical suffixes:“-desis”typically indicates surgical binding/fusion, and“-rrhaphy”indicates surgical repair by suture. “Z-plasty” is a plastic surgery technique; “instrument used for Z-plasty” is not a standard suffix definition. For CPC-style questions, the safest approach is to memorize the trio:graph (instrument)/gram (record)/graphy (process). That pattern also helps with radiology terms (mammogram, angiography) and diagnostic testing vocabulary.