Abstract
Tissue plasminogen activator (tPA) (250 micrograms/ml) was used to facilitate removal of submacular thrombus in 15 patients. Following a three-port vitrectomy and subretinal tPA injection (0.1 ml) via a 30 gauge needle, blood was evacuated after enzymatic dissolution for 20 minutes. Two injections were required in some cases. Nine women and six men were treated (mean age 75.5 +/- 8.6 years). Duration of symptoms ranged from 2 days to 8 weeks. One case was due to a retinal macroaneurysm, the others to age-related macular degeneration. Vision improved in 13 patients and remained the same or deteriorated in 2 (mean follow-up 11 +/- 4.9 months). Well-defined subretinal neovascular membranes were identified in 2 patients and occult neovascularisation suspected in 2 others. A cataract developed in 1 case and retinal detachments in 2 others; all were treated successfully. The poor visual prognosis associated with submacular haemorrhage may be obviated by the use of the technique we describe.
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