Nocebo-induced hyperalgesia during local anesthetic injection.

Area of Science:

• Medical Anesthesiology
• Pain Management
• Psychological Medicine

Background:

• Healthcare providers often use cautionary language when administering local anesthetics.
• This practice may inadvertently increase patient anxiety and pain perception.
• The impact of verbal cues on pain experience requires further investigation.

Purpose of the Study:

• To investigate whether using gentler language during local anesthetic administration improves pain perception and patient comfort.
• To compare the effects of reassuring versus cautionary (nocebo) language on pain scores.

Main Methods:

• A randomized controlled trial involving 140 healthy women at term gestation undergoing neuraxial analgesia.
• Participants were assigned to either a "placebo" group (reassuring language) or a "nocebo" group (cautionary language).
• Pain was assessed immediately post-injection using a 0-10 verbal analog scale.

Main Results:

• Patients receiving local anesthetic with gentler, reassuring words reported significantly lower median pain scores (3 [2-4]) compared to those receiving cautionary words (5 [3-6]).
• The difference in pain scores was statistically significant (P < 0.001).

Conclusions:

• The choice of words used by healthcare providers can significantly influence patient pain perception during invasive procedures.
• Employing gentler, more reassuring language is recommended to enhance patient comfort and improve the subjective experience during local anesthetic administration.