Pain associated with local anesthetic injection in eyelid procedures: Comparison of microprocessor-controlled versus...

Area of Science:

• Ophthalmology
• Anesthesiology
• Medical Devices

Background:

• Local anesthetic infiltration is standard for minor eyelid procedures.
• Traditional manual syringe techniques can cause significant patient discomfort and pain.
• Minimizing pain during local anesthesia is crucial for patient satisfaction and procedural tolerance.

Purpose of the Study:

• To compare the pain experienced during eyelid local anesthetic infiltration using a microprocessor-controlled delivery system (CompuMed Wand) versus a traditional manual syringe.
• To evaluate both the severity and duration of pain associated with each injection technique.

Main Methods:

• A randomized clinical trial involving 30 patients undergoing minor eyelid surgery.
• Patients were randomized to receive local anesthetic via either the CompuMed Wand system (n=15) or a traditional manual syringe (n=15).
• Pain was quantified using a visual analog scale (0-10) and the duration of pain was recorded for each participant.

Main Results:

• The CompuMed Wand group reported a significantly lower mean pain level (1.5) compared to the syringe group (3.2) (p < 0.01).
• The mean duration of pain was substantially shorter in the Wand group (1.5 seconds) versus the syringe group (34 seconds) (p < 0.01).

Conclusions:

• The microprocessor-controlled CompuMed Wand system is effective in significantly reducing pain during local anesthetic infiltration for minor eyelid surgery.
• Patient-reported pain appears primarily associated with the initial needle insertion rather than the anesthetic injection itself.
• The Wand system offers a superior patient experience by minimizing pain and discomfort during eyelid procedures.