Table 9.

Preoperative checklist

Preoperative checklist[20,53,54,67]
History	Onset Risk factors Progression Comorbidities (diabetes, immunosuppression, peripheral vascular disease) Drugs (retinoids, chemotherapy, ART, anti-platelet,$ anti-coagulant drugsa)
Examination	Number of nails affected Severity/extent Status of nail folds, cuticle Associated nail plate changesb
Grading	Refer to Tables 5–7
Digital pressure test/fluctuance	To rule out an abscess (blanching will be seen)
Investigations	Blood sugar HIV Coagulation profile 10% KOH mount––nail clipping/subungual debrisc Fungal culture
Consent	An informed consent for the surgery is taken.

KOH = potassium hydroxide, HIV = human immunodeficiency virus

^aThese drugs may cause increased bleeding during surgery

^bIf nail plate changes/irregularities are present, decision may be taken to remove the nail plate during surgery

^cIf onychomycosis or secondary fungal colonization is suspected