peribulbar injection
Injection technique placing medication around but not within the eye for local anesthesia or drug delivery.
Full Definition
Peribulbar injection is a technique used in ocular oncology to deliver medications, typically anesthetics or chemotherapy agents, into the space surrounding the eyeball but outside the muscle cone. This approach provides effective local drug concentration while minimizing systemic exposure. In cancer treatment, peribulbar injections may be used to deliver chemotherapy directly to orbital tumors or as adjuvant therapy. The technique involves needle placement in the peribulbar space, typically through the lower eyelid or lateral canthal area, avoiding penetration of the globe or optic nerve.
Usage
Usage note: Distinguish from retrobulbar injection, which penetrates the muscle cone.
In Context
- "A peribulbar injection of triamcinolone was administered to reduce orbital inflammation." — Procedure note
- "The patient received peribulbar anesthesia prior to plaque placement surgery." — Surgical report