botulinum toxin injection
A therapeutic procedure using botulinum toxin to temporarily weaken extraocular muscles for strabismus treatment or ptosis management.
Full Definition
Botulinum toxin injection involves the precise delivery of botulinum toxin type A into specific extraocular muscles to create temporary paralysis lasting 3-6 months. In pediatric ophthalmology, this technique is used for acute sixth nerve palsies, infantile esotropia, and as an alternative to incisional surgery in selected cases. The injection weakens the target muscle while allowing the antagonist to function, potentially improving ocular alignment. EMG guidance ensures accurate muscle localization. Complications include temporary ptosis, diplopia, and overcorrection. The procedure is particularly valuable in young children where the long-term prognosis for spontaneous recovery is uncertain, avoiding potentially unnecessary traditional surgery.
Usage
Usage note: Specify target muscle, dosage, guidance method (EMG vs. direct visualization), and expected duration of effect.
In Context
- "Botulinum toxin injection into the medial rectus provided temporary improvement in the sixth nerve palsy." — Non-surgical treatment documentation
- "EMG-guided botulinum toxin injection was chosen over immediate surgery for this acute-onset esotropia." — Treatment decision rationale