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Corneal sensitivity after percutaneous radiofrequency trigeminal rhizotomy: a quantitative study
Annals of Ophthalmology
|August 1, 1982
Summary
Trigeminal neuralgia patients undergoing trigeminal rhizotomy may experience decreased corneal sensation post-operation. However, this reduction often goes unnoticed clinically, suggesting preserved corneal health despite altered sensitivity.
Area of Science:
- Ophthalmology
- Neurosurgery
- Neurology
Background:
- Trigeminal neuralgia is a debilitating condition affecting facial nerves.
- Trigeminal rhizotomy is a surgical option for managing trigeminal neuralgia.
- Corneal sensation plays a vital role in ocular surface protection.
Purpose of the Study:
- To quantitatively assess corneal sensation changes after trigeminal rhizotomy in trigeminal neuralgia patients.
- To correlate objective sensory measurements with clinical presentation post-surgery.
Main Methods:
- A quantitative study involving 13 trigeminal neuralgia patients.
- Corneal sensation was measured using the Cochet-Bonnet esthesiometer.
- Preoperative and postoperative sensory evaluations were performed.
Main Results:
- Five out of 13 patients showed a decrease in corneal sensation in the operated eye compared to the non-operated eye.
- This sensory deficit was not clinically apparent through symptoms or signs.
- Follow-up for up to 23 months did not reveal any clinical corneal issues.
Conclusions:
- Radiofrequency trigeminal rhizotomy can lead to subclinical corneal sensory deficits.
- Selective fiber destruction may preserve corneal nerves essential for nutrition and protection.
- Clinical monitoring alone may not detect subtle sensory changes after this procedure.