II. Definition

  1. Local Skin Anesthesia in a diamond or square shape, circumferentially around a wound or lesion

III. Indications

  1. Contaminated wounds
  2. Skin Abscess
  3. Wounds with risk of distortion after Anesthetic injection (e.g. vermilion border)

IV. Efficacy

  1. Advantages
    1. Field Anesthesia may have longer duration than simple wound infiltration
    2. Does not distort lesion landmarks
  2. Disadvantages
    1. May require larger amounts of Anesthetic
    2. May fail to provide adequate Anesthesia in regions of complex innervation (nose)

V. Types: Examples

Images: Related links to external sites (from Bing)

Related Studies