玻璃膜下出血(Subhyaloid.hemorrhage·SHH)又称为视网膜前出血,主要见于蛛网膜下腔出血(Subarachnoid hemorrhage)。文献记载发生率在4—20％之间。SAH伴发SHH时多为急性发病,头痛和呕吐、脑脊液压力高,说明SHH是急性高颅压的结果。其发生机制有二种说法:(1) 颅内压急骤增高,使视网膜静脉还流障碍淤滞出血。(2) 破入蛛网膜下腔的血液直接沿视神经周围的蛛网膜下间隙窜入玻璃膜下,集积扩散成为境 Subhyaloid hemorrhage SHH, also known as pre-retinal hemorrhage, is mainly found in Subarachnoid hemorrhage. Documented incidence of 4-20%. SAH associated with SHH mostly acute onset, headache and vomiting, cerebrospinal fluid pressure, indicating that SHH is the result of acute high intracranial pressure. There are two mechanisms of its statement: (1) sudden increase in intracranial pressure, retinal flow also flow barriers stasis bleeding. (2) broken into the subarachnoid blood directly along the optic nerve around the subarachnoid space fleeing into the glass membrane, the accumulation of proliferation into the environment