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Year : 2010  |  Volume : 13  |  Issue : 2  |  Page : 125-127

Intraocular pressure, retrobulbar anaesthesia and digital ocular massage

Guinness Eye Center, Onitsha, Nigeria

Correspondence Address:
SNN Nwosu
Guinness Eye Center, Onitsha
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Source of Support: None, Conflict of Interest: None

PMID: 20499741

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Objectives: To determine the degree of intraocular pressure (IOP) rise following retrobulbar anaesthetic injection as well as the optimal time required for the return of the IOP to the pre-injection level following ocular massage. Materials and Methods: Using the Perkins hand-held tonometer, the IOP of consecutive adult patients were measured in the operating room before local anaesthetic (3ml of 2% xylocaine with or without adrenaline) injection; immediately after injection and every minute following ocular massage for the next5minutes. Results: Twenty-three eyes of 17 patients, aged 23-71 years, were studied. The mean (±SD) baseline (pre-injection) IOP was 16.6(±6.8) mmHg. Immediately after the injection the IOProseby11.8-80% with a mean of 37.3±16.8% (95%CI: 30.4-44.2). By 3 minutes the IOP had returned to the pre-injection level. After 3 minutes the IOP had become lower than the pre-injection level (p<0.05) Conclusions: IOP rise following retrobulbar injection of 3 ml of local anesthetic varies from 11.8-80%. Digital ocular massage lowers the IOP to pre-injection levelin60.2% in3minutes; in 5 minutes it lowers the IOP to pre-injection level in all eyes and to below pre-injection level 86%.

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