Topical anesthesia versus topical and subconjunctival anesthesia combined in diabetic retinopathy photocoagulation

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Abstract

Purpose: comparison between two anesthetic techniques on the ability to reduce pain during panretinal photocoagulation (PRP) treatment. Methods: Observational retrospective single center study. Medical charts of patients who underwent PRP for proliferative diabetic retinopathy were revised. Patients were included if they had the first eye treated with oxybuprocaine hydrochloride drops, and in case of severe pain, the fellow eye received topical anesthesia in combination with 2% subconjunctival lidocaine. The groups were compared for pain perception using an analog visual scale (VAS), number of laser spots, number of interruptions, and laser session duration. Results: Forty-two eyes of 21 patients (mean age: 58.3 ± 7.6 years) were analyzed. The mean number of laser spots was significantly higher under combined anesthesia (+84.2 ± 155.9 spots, p = 0.01), with a reduced time for laser execution (−2.5 ± 3.12, p = 0.0008). The use of combined anesthesia significantly decreased the number of interruptions (−40.8%, p < 0.0001) into a single session. On the pain grading scale, the pain perception was significantly lower in the combined anesthesia group (p < 0.0001). In eyes receiving topical anesthesia the treatment was stopped for pain in 5 eyes (23.8%), while 5 eyes under combined anesthesia presented subconjunctival hemorrhage (23.8%). Conclusion: Using combined anesthesia in patients subjected to PRP appeared to reduce pain perception limiting the treatment duration and the interruptions for pain without significant complications. Further studies on a larger scale would be desirable to replicate such findings and standardize the analgesic procedures in ophthalmology.

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Mafrici, M., Fragiotta, S., Tarsitano, M. G., Lorenzi, U., & Toscani, L. (2024). Topical anesthesia versus topical and subconjunctival anesthesia combined in diabetic retinopathy photocoagulation. European Journal of Ophthalmology, 34(2), 529–533. https://doi.org/10.1177/11206721231199206

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