Iontophoresis for eyelid anesthesia

Area of Science:

• Ophthalmology
• Anesthesiology
• Dermatology

Background:

• Local anesthesia is standard for eyelid surgery.
• Patient apprehension regarding injection pain is a significant concern.
• Minimizing procedural discomfort is crucial for patient satisfaction.

Purpose of the Study:

• To evaluate the efficacy of iontophoresis for achieving superficial eyelid skin anesthesia.
• To assess the reduction in pinprick pain sensation using iontophoresis.
• To compare pain levels during eyelid surgery with and without pre-treatment iontophoresis.

Main Methods:

• Lidocaine hydrochloride 4% solution was applied via iontophoresis to one eyelid in a double-masked, randomized manner.
• Pinprick skin sensation was tested on treated and untreated eyelids in normal subjects.
• Patients undergoing eyelid surgery received iontophoresis on one eyelid before anesthetic infiltration.

Main Results:

• Normal subjects reported significantly less pain (P < .008) on iontophoresis-treated eyelids (0.25) versus untreated eyelids (2.55).
• Eyelid surgery patients experienced significantly less pain (P < .02) on iontophoresis-treated eyelids (1.4) compared to untreated eyelids (4.7).
• Iontophoresis demonstrated a marked reduction in subjective pain scores for both study groups.

Conclusions:

• Iontophoresis is an effective method for achieving short-term, superficial anesthesia of the eyelid skin.
• This technique can significantly alleviate the pain associated with local anesthetic injections for eyelid procedures.
• Iontophoresis offers a promising, non-invasive approach to enhance patient comfort in ophthalmic and oculoplastic surgery.