Tetracaine

Definition

Tetracaine is a local anesthetic commonly used in ophthalmology to numb the surface of the eye. Its fast onset and short duration make it ideal for minor procedures.

5 Must Know Facts For Your Next Test

1. Tetracaine works by blocking sodium ion channels, preventing nerve signal transmission.
2. It is typically administered as eye drops for procedures like tonometry or foreign body removal.
3. The effects of tetracaine usually begin within 30 seconds and last about 15-20 minutes.
4. Potential side effects include stinging, redness, or allergic reactions.
5. Overuse can lead to corneal damage, highlighting the importance of careful administration.

Review Questions

• How does tetracaine achieve its anesthetic effect?
• What are common uses of tetracaine in ophthalmology?
• What are potential side effects and risks associated with tetracaine use?

Related terms

Proparacaine:

Another local anesthetic used for similar ophthalmic purposes as tetracaine.

Fluorescein: A dye often used in conjunction with ocular anesthetics to assess corneal injuries.

Corneal Abrasion: An injury that might require the use of an ocular anesthetic like tetracaine for examination and treatment.