II. Definition
- Local Skin Anesthesia in a diamond or square shape, circumferentially around a wound or lesion
III. Indications
- Contaminated wounds
- Skin Abscess
- Wounds with risk of distortion after Anesthetic injection (e.g. vermilion border)
IV. Efficacy
- Advantages
- Field Anesthesia may have longer duration than simple wound infiltration
- Does not distort lesion landmarks
- Disadvantages
- May require larger amounts of Anesthetic
- May fail to provide adequate Anesthesia in regions of complex innervation (nose)