safe retrobulbar block; How?

ABSTRACT

In a retrospective study; the incidence and severity off retrobular haemorrhage [RBH] were estimated in 1378 patients subjected to various ocular operations under local anaesthesia. The retrobulbar block [RBB] was done by disposable needles of 38.9 mm and 20 gauge. RBH had occurred in 33 [2.4%] patients [4 mild, 5 moderate and 24 severe]. In a prospective study, the safety and efficacy off the trocars of two i.v. cannulae in doing the RBB were evaluated in two groups of patients, each formed off 100 patients. A mild RBH occurred in one patient off the group off "Angiocath" trocars, and no RBH had occurred in the group of "Supercath" trocars. Both trocars were proved to be cheap, safe and effective needles for doing the RBB for various ocular operations done under local anaesthesia