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Suspected brainstem anesthesia following retrobulbar block in a cat
James A C Oliver1, Carl A Bradbrook
1Davies Veterinary Specialists, Manor Farm Business Park, Higham Gobion, Hertfordshire, SG3 5HR, UK. james.oliver@vets-now.com
Veterinary Ophthalmology
|July 21, 2012
Summary
A cat experienced apnea and neurological signs after a retrobulbar block for eye surgery. These effects, likely due to local anesthetic spread, resolved within 3 hours, highlighting a potential complication of feline retrobulbar anesthesia.
Area of Science:
- Veterinary Anesthesiology
- Ophthalmology
- Neurology
Background:
- Retrobulbar blocks are used for ocular analgesia in cats.
- Potential complications, though rare, require careful monitoring.
- This case highlights a previously unreported adverse event.
Observation:
- A cat undergoing enucleation developed apnea and tachycardia post-retrobulbar injection.
- Neurological signs including tremors and nystagmus were observed upon recovery.
Findings:
- Apnea and neurological signs were attributed to brainstem anesthesia, likely due to intrathecal spread of local anesthetic.
- Symptoms resolved spontaneously within 3 hours without intervention.
Implications:
- This case highlights a potential risk of central nervous system effects from retrobulbar blocks in cats.
- Further investigation into anesthetic spread and safety protocols is warranted for feline retrobulbar anesthesia.
