Necrotizing fasciitis other diagnostic studies

Finger probe test is useful in the diagnosis of necrotizing fasciitis.^[1]

• Finger probe test is useful in the diagnosis of necrotizing fasciitis.^[1]

• This test is carried out in the ward, emergency room and in the theatre under local or general anesthesia.
• After infiltrating the area, a 2cm incision is made down to the deep fascia.
• Fascia will be swollen and grey on gross inspection.
• Gentle probing with index finger is performed at the level of deep fascia and if the tissue dissects with the minimal resistance, then finger probe test is considered positive.
• Signs suggesting necrotizing fasciitis include:
  • Lack of bleeding
  • Lack of normal tissue resistance on finger probe
  • Oozing of malodorous “dish water fluid”