| Comparison of Anesthetic Efficacy and Intraocular Pressure by Volume of Sub-Tenon's Anesthetic in Vitreoretinal Surgery. |
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Hyun Seung Moon, Dong Heun Nam, Hae Jung Paik |
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Department of Ophthalmology, Gachon University of Medicine and Science, Gil Medical Center, Incheon, Korea. eyedawns@gilhospital.com |
| 유리체망막수술시 테논낭하마취의 용량에 따른 안압 및 마취효과의 비교 |
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문현승,남동흔,백혜정 |
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Department of Ophthalmology, Gachon University of Medicine and Science, Gil Medical Center, Incheon, Korea |
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Correspondence:
Hyun Seung Moon, M.D. |
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| Abstract |
PURPOSE
To compare the effects of different volumes of sub-Tenon's anesthetic on intraocular pressure (IOP) and to evaluate the treatment efficacy of vitreoretinal surgery. METHODS: A prospective, clinical trial was conducted on patients undergoing sub-Tenon's anesthesea for vitreoretinal surgery. Patients were randomized to receive either 3 mL, 5 mL or 7 mL of anesthetic solution. IOPs were measured immediately prior to, immediately after, and at 2, 5 and 10 min after the injection. Pain scores were assigned using a numerical visual analogue scale immediately following surgery and again on postoperative day one. RESULTS: A total of 108 patients (119 eyes) were studied, including 35 eyes in the 3 mL group, 48 eyes in the 5 mL group, and 36 eyes in the 7 mL group. There was significant elevation in mean IOP following injection in all groups and a trend toward a larger increase in the group receiving the larger volume (p<0.01). Mean IOPs were elevated immediately after the injections and reduced at all subsequent time intervals. But reduction to the pre-injection level was only achieved in the 3 mL group. There was no significant difference in patient-reported pain scores among the groups when assessed immediately after surgery or on postoperative day one. The incidence of chemosis and high IOP elevation (40 mmHg < or =) was more frequent in the 7 mL group than the other groups (p<0.05). CONCLUSIONS: Sub-Tenon's anesthesia is effective in vitreoretinal surgery. It would appear that a 3-5 mL volume of anesthetic is safe even when complications are considered. |
| Key Words:
Efficacy;Intraocular pressure;Sub-Tenon's anesthesia;Vitreoretinal surgery |
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