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Abstract #45584 Published in IGR 13-2
Reduction of intra-ocular pressure by ocular compression before combined peri- and retrobulbar block
Kallio H; Harju MP; Ihanamaki T; Vesti ET; Kivela TAnaesthesia 2011; 66: 278-282
The intra-ocular pressure immediately before glaucoma surgery can be raised. We wished to investigate if ocular compression for 20 min before a combined peri- and retrobulbar injection would result in a lower pressure after the block. Sixty consecutive patients scheduled for filtration surgery were randomly assigned to receive ocular compression using an external pressure device for 20 min before combined peri- and retrobulbar injection (intervention group, who also received compression after the block) or to a control group in whom pressure was applied only after the block was completed. The intra-ocular pressure was measured at baseline, after the 20-min pre-injection compression (intervention group), after injecting the block, and after the 10-min post-injection compression. The pressure did not differ between groups at baseline, after the block or after the post-injection compression. In the intervention group, the compression before the block reduced the median (IQR [range]) pressure from 21.0 (17.0-25.0 [12.0-40.0]) mmHg to 16.8 (12.5-22.5 [7.5-33.5]) mmHg (p < 0.001). We conclude that external ocular compression reduces the intra-ocular pressure, but applying an additional compression for 20 min before injecting the block is not beneficial.
H. Kallio. Department of Anaesthesiology and Intensive Care Medicine, Helsinki University Hospital, Helsinki, Finland. Email: helena.kallio@hus.fi
Classification:
6.1.3 Factors affecting IOP (Part of: 6 Clinical examination methods > 6.1 Intraocular pressure measurement; factors affecting IOP)
12.17 Anesthesia (Part of: 12 Surgical treatment)
12.20 Other (Part of: 12 Surgical treatment)
