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  • Title: Analgesic effects of sub-Tenon's versus retrobulbar anesthesia in planned extracapsular cataract extraction.
    Author: Tokuda Y, Oshika T, Amano S, Inouye J, Yoshitomi F.
    Journal: Graefes Arch Clin Exp Ophthalmol; 2000 Mar; 238(3):228-31. PubMed ID: 10796037.
    Abstract:
    BACKGROUND: A prospective study was conducted to compare the analgesic effects of sub-Tenon's and retrobulbar anesthesia by assessing patients' response to the visceral stimulus. METHODS: Seven hundred and twenty eyes of 720 patients underwent extracapsular cataract extraction and posterior chamber intraocular lens implantation. They received retrobulbar anesthesia with 3 ml lidocaine (225 eyes), retrobulbar anesthesia with 5 ml lidocaine (216 eyes), or sub-Tenon's anesthesia with 3 ml lidocaine (279 eyes). Pain scores were recorded when an acetylcholine chloride solution was injected into the anterior chamber to attain miosis after lens implantation. RESULTS: Pain scores were significantly different among the three anesthesia groups (P<0.0001, Kruskal-Wallis test). The multiple comparison revealed that analgesic effects were highest with sub-Tenon's anesthesia, followed by 5-ml retrobulbar and 3-ml retrobulbar anesthesia. CONCLUSION: Sub-Tenon's anesthesia is an effective and reliable anesthetic method in cataract surgery.
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