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Memorias del Instituto de Investigaciones en Ciencias de la Salud

versão On-line ISSN 1812-9528

Resumo

IRRAZABAL, V et al. Subtenon anaesthesia versus peribulbar anaesthesia in extracapsular cataract surgery. Mem. Inst. Investig. Cienc. Salud [online]. 2006, vol.4, n.2, pp. 37-44. ISSN 1812-9528.

In order to compare the effectiveness of subtenon anaesthesia and peribulbar anaesthesia in extracapsular surgery, 35 patients were randomly selected to receive subtenon anaesthesia (8 women and 9 men) or peribulbar anaesthesia (13 women and 5 men) at the Fundación Visión in Asunción (Paraguay). Intraocular pressure (IOP) was measured before and after the first and ten minutes of anaesthesia. The motility of the rectus muscles was evaluated after ten minutes of injection as well as the patient' pain level during and at the end of surgery and the surgeon satisfaction level. One minute after the injection, IOP increased significantly with the peribulbar anaesthesia (p<0.008), returning to pre-injection levels by 10 minutes in both groups. Statistically significant differences were found among the groups in the elevation (p=0.005), abduction (p=0,02) and depression (p=0.01) of the rectus muscles after 10 minutes of injection; and also in the intra-surgical pain levels (p=0.04). No differences were found either in the pain level due to the anaesthesia injection or the surgeon satisfaction level. In conclusion, subtenon anaesthesia produced fewer increase of the IOP than the peribulbar anaesthesia and the partial akinesia obtained was not a limiting factor for the surgeon. Even though, higher percentage of patients of the subtenon group referred some degree of intra-surgical pain, it was considered tolerable due to the fact that no booster of the anaesthesia was needed.

Palavras-chave : Subtenon anaesthesia; peribulbar anaesthesia; intraocular pressure; ocular motility; pain level; surgeon satisfaction.

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