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Intraoperative eye position after sub-Tenon's anesthesia for cataract surgery
Nishant Kumar1, Sharmila Jivan, Vidya Pulpa
1Eye Unit, Royal Gwent Hospital, Newport, UK. nishant6377@aol.com
Summary
Sub-Tenon
Area of Science:
- Ophthalmology
- Anesthesiology
Background:
- Sub-Tenon's anesthesia is commonly used for ophthalmic procedures.
- Ocular deviation following anesthesia can impact surgical outcomes.
Purpose of the Study:
- To quantify the incidence and degree of ocular deviation after sub-Tenon's anesthesia.
- To assess the effect of sub-Tenon's anesthesia on ocular motility.
Main Methods:
- Prospective observational case series of 75 patients undergoing phacoemulsification.
- Exclusion of patients with pre-existing motility disorders or on warfarin.
- Objective assessment of ocular deviation using the Krimsky test and forced duction tests before and after anesthesia.
Main Results:
- Significant ocular deviation observed in most patients post-anesthesia (77% hyperdeviation, 97% exodeviation).
- Mean vertical deviation was 4.4 PD and mean horizontal deviation was 19.5 PD.
- No mechanical restriction of ocular motility was detected by forced duction tests.
Conclusions:
- Sub-Tenon's anesthesia is associated with considerable ocular deviation.
- Consider additional corrective blocks if intraoperative deviation occurs to ensure surgical success.
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