Lidocaine with Epinephrine: Recommended Procedures and Applications

Introduction to Recommended Procedures

• The American Academy of Dermatology recommends lidocaine with epinephrine for a wide variety of office-based dermatologic procedures, including skin biopsies, excisions, wound closures, tissue rearrangements, skin grafting, cauterization, nonablative laser procedures, and ablative skin resurfacing 1, 2
• Lidocaine with epinephrine can be used for full-face ablative laser resurfacing, combined with topical and nerve block anesthesia, as recommended by the American Academy of Dermatology 1, 3
• The American Academy of Dermatology also recommends lidocaine with epinephrine for follicular unit hair transplantation, combined with tumescent local anesthesia 1, 2

Anatomical Considerations

• The American Academy of Dermatology states that adding epinephrine to local infiltrative anesthesia is safe for use in digits, with no cases of necrosis reported in studies, and resulting in less need for tourniquets 4, 5, 6
• The American Academy of Dermatology recommends using lidocaine with epinephrine for procedures on the penis, with a single retrospective study showing no anesthetic-related complications 4, 6

Dosing Recommendations

• The American Academy of Dermatology recommends a maximum of 7.0 mg/kg of lidocaine with epinephrine in a single treatment for adults 1, 2, 3
• For children, the American Academy of Dermatology recommends a maximum of 3.0-4.5 mg/kg of lidocaine with epinephrine in a single treatment 1, 3
• For multistage procedures, such as Mohs micrographic surgery, the American Academy of Dermatology recommends a maximum of 50 mL of 1% lidocaine solution (500 mg) delivered over several hours 1, 7

Optimal Epinephrine Concentration

• The American Academy of Dermatology states that concentrations of 1:50,000, 1:100,000, and 1:200,000 all have similar effects on vasoconstriction, prolonging anesthetic duration by approximately 200% 5

Special Populations

• The American Academy of Dermatology recommends that local infiltrative anesthesia with epinephrine may be administered to patients with stable cardiac disease, but consultation with the patient's cardiologist is recommended if uncertain about the patient's ability to tolerate epinephrine 4, 5
• For pregnant women, the American Academy of Dermatology recommends that small amounts of lidocaine with epinephrine appear safe, but elective procedures should be postponed until after delivery, and urgent procedures should be delayed until the second trimester when possible 4, 5

Safety Precautions

• The American Academy of Dermatology recommends using the lowest effective dose of local anesthetic, aspirating the needle/catheter prior to each injection, using incremental injections of anesthetic, and continually assessing and communicating with the patient to monitor for signs of early toxicity 1, 3

Alternatives for Lidocaine-Allergic Patients

• The American Academy of Dermatology recommends ester-type local anesthetics, bacteriostatic normal saline, or 1% diphenhydramine as alternatives for lidocaine-allergic patients 1, 8

Safety Measures for Lidocaine with Epinephrine in Facial and Scalp Procedures

Dosing and Calculation

• Calculate the maximum allowable lidocaine‑epinephrine dose using ideal body weight rather than actual weight in patients with a body‑mass index > 30 to prevent overdose. 9

Injection Technique

• Perform slow, incremental injections (avoid rapid bolus administration) to minimize the risk of systemic toxicity. 9

Timing Relative to Other Local Anesthetics

• Do not administer lidocaine with epinephrine within 4 hours of any other local anesthetic procedure, thereby avoiding cumulative local‑anesthetic toxicity. 9

Solution Preparation

• Avoid using lidocaine‑epinephrine solutions that contain crystals; if crystals are present, filter the solution before injection. 10

Use of Lidocaine with Epinephrine for Finger Lacerations

Guideline Recommendation

• The American Academy of Dermatology issues a Level A (strong) recommendation to add epinephrine to lidocaine when anesthetizing digits, based on high‑quality Level I‑II evidence demonstrating safety and efficacy. 11

Clinical Benefits

• Hemostasis: In randomized trials, the addition of epinephrine reduced intra‑operative bleeding to ≈ 17 % (9/52 patients) compared with ≈ 49 % (25/51 patients) without epinephrine, improving wound visualization and often eliminating the need for a tourniquet. 11

Safety Profile

• Digital necrosis: Systematic reviews and randomized controlled trials have reported no cases of digital necrosis associated with modern lidocaine‑epinephrine mixtures. 11

Technique Recommendations

• Volume: Inject the lowest effective volume needed to achieve adequate anesthesia for the procedure. 11
• Pain reduction: Buffering lidocaine with sodium bicarbonate (approximately 1 part bicarbonate to 9–10 parts lidocaine) is Level A recommended to lessen injection pain. 11

Patient Selection & Precautions

• Cardiovascular risk: In patients with uncontrolled hypertension or unstable cardiac disease, clinicians should consult cardiology before using epinephrine‑containing anesthetic. 11

Common Pitfalls to Avoid

• Outdated teaching: Continuing to avoid epinephrine in finger procedures based on historic teachings is contrary to current evidence, which supports its safety. 11
• Excessive volume: Using more than the minimum effective dose should be avoided to minimize any theoretical risk; adhere to the minimum effective volume principle. 11