Patient Care. For 6 to 8 hours prior to the examination the patient is not allowed to take any food or liquids by mouth. The stomach should be empty during the procedure to facilitate inspection of its lining and to avoid vomiting and aspiration of liquids into the lungs.atient Care. For 6 to 8 hours prior to the examination the patient is not allowed to take any food or liquids by mouth. The stomach should be empty during the procedure to facilitate inspection of its lining and to avoid vomiting and aspiration of liquids into the lungs.
Cerebrovascular Disease. The word cerebrovascular is made up of two parts â cerebro which refers to the large part of the brain, and vascular which means arteries and veins. Together, the word cerebrovascular refers to blood flow in the brain. The term cerebrovascular disease includes all disorders in which an area of the brain is temporarily or permanently affected by ischemia or bleeding and one or more of the cerebral blood vessels are involved in the pathological process.
Cerebrovascular disease usually causes visual disturbance in both eyes but should be considered when a patient presents with unilateral blurred vision. Systemic causes Giant cell arteritis (temporal arteritis) - see 'Unilateral, sudden and painful', above - may be associated with a painful or tender head but the eye is not usually painful.