PREOPERATIVE ASSESSMENT AND PREPARATION OF THE PATIENT Patient History A thorough and efficient preoperative evaluation is mandatory for all patients undergoing nail surgery as for any other dermatologic operation. Screening for underlying diseases, especially focusing on any cause of vascular impairment of the extremities (diabetes, Raynaud’s disease, smoking, arteriopathy, etc.), current medication and potential allergies (latex, povidone-iodine, antibiotics, pain killers of any type, anesthetics, etc.) should be performed.