The Effects Of Tourniquet On Intraocular Pressure During Lower Extremity Surgery Under Spinal Anesthesia
Eyup Aydogan1, Inci Kara1, Jale Bengi Celik1, Seza Apiliogullari1, Sansal Gedik2, Banu Bozkurt2
1Department of Anesthesia and Intensive Care, Selcuk University, Konya, Turkey
2Department of Ophthalmology, Selcuk University, Konya, Turkey
BACKGROUND: In this prospective study we aimed to examine the effects of pneumatic tourniquet on intraocular pressure (IOP) during elective lower extremity surgery under spinal anesthesia MATERIAL-METHODS: After approval (2012/34) by the institutional review board thirty consecutive patients undergoing elective lower extremity surgery with tourniquet (Group 1) under spinal anesthesia and thirty consecutive patients undergoing elective lower extremity surgery without tourniquet (Group 2) were included to the study. Intraocular pressure measurements were performed before spinal anethesia (T1), 5 minutes after spinal anesthesia (T2), 5 minutes after begining of the surgery (T3) and 5 minutes after ending of the surgery (T4). All measurements were performed in the supine position. Mean arterial blood pressure, heart rate, intraocular pressure and bleeding volumes were recorded. RESULTS: IOP measures at baseline (T1) and 5 minutes after spinal anesthesia (T2) were similar in both groups but T2 measures were lower than T1 measures. However, T3 measurements in group 1 were higher than in group 2. CONCLUSION: Spinal anesthesia decreases IOP but tourniquet insuflation increases IOP in patients who undergo lower extremity surgery.
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