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Vitreous hemorrhage disease name: vitreous hemorrhage (vitreous hemorrhage) owned sites: the eye doctor Section: ENT ophthalmic signs and symptoms: visual disturbances, corneal opacity, exophthalmos, eye pain, vitreous hemorrhage Introduction
Vitreous hemorrhage eye injury is a vascular disease or retinal damage caused by a common complication of vision, on the one hand, bleeding not only the refractive media opacity, obstruct the light reach the retina, and can seriously undermine the role of eye tissue; the other hand, , the body's response to the hemorrhage of blood can be removed gradually. In different cases, vitreous hemorrhage is very different consequences, should be based on the primary injury, the amount of work the body bleeding, bleeding and ocular absorption of the performance conditions such as timely to the appropriate clinical treatment. Vitreous hemorrhage, vitreous hemorrhage in the cause of knowledge: for any reason or retinal neovascularization of uveal tissue proliferation of vascular conditions such as vitreous hemorrhage, the symptoms of .: ultrasound examination of the vitreous hemorrhage had greater diagnostic value, especially in the vitreous can not . Check bleeding: ultrasound examination of the vitreous hemorrhage had greater diagnostic value, especially in the not . the differential diagnosis of vitreous hemorrhage: vitreous hemorrhage caused by posterior vitreous detachment, should be in the ultrasound image diagnosis of vitreous hemorrha


ge and the prevention of . : Prevention of common sense: vitreous hemorrhage occurred, we must first identify the cause of the complications of plot . vitreous hemorrhage: the amount of bleeding, there may be black, red, as the disease, bleeding can seriously affect a large number of vitreous hemorrhage as . Treatment: In most cases, spontaneous absorption of vitreous hemorrhage in 4 ~ 6 months .
Vitreous hemorrhage caused by why?
Any reason or retinal neovascularization of uveal vascular tissue such cases, the vitreous cavity, there may be new blood vessels, eye trauma, and retinal vascular diseases, is caused by clinically the most common cause of vitreous hemorrhage.
In the eye trauma, or penetrating eye injury can be caused by ocular blunt traumatic vitreous hemorrhage, perforation wound in the sclera, scleral perforation and posterior segment of the retention of foreign body, the high incidence of vitreous hemorrhage, causing eye contusion eye strain can cause retinal transient choroidal rupture and hemorrhage; front of vitreous hemorrhage caused by injury of the ciliary body parts, according to our observation of a group of patients, traumatic vitreous hemorrhage and can be accounted for mainly involving cases of posterior segment 25% of blunt ~ 45%, Juan and other eye injury on 453 cases of patients the statistical results showed that 145 cases of vitreous hemorrhage, accounting for 32%.
More spontaneous vitreous hemorrhage diseases, including retinal choroidal inflammatory, degenerative or malignant diseases, according to a statistical group of patients, diabetic retinopathy accounted for 34.1%; retinal breaks without detachment 22.4%; rhegmatogenous retinal detachment 14.9%; retinal vein occlusion, 13.0%, 84% of the above four diseases, other diseases such as posterior vitreous detachment, retinal vasculitis, retinal vein inflammation around age-related macular degeneration, intraocular tumors, retinopathy of premature children, the occurrence of vitreous Bleeding is also a considerable proportion of cases, such as San Tin An Jifang diabetes, eye trauma, except for the two causes of vitreous hemorrhage in 151 cases of unilateral clinical analysis of cases is caused mainly due to hemorrhage, retinal hole formation accounted for 42%; retina vein occlusion 37%, some blood diseases such as leukemia, retinoschisis can also lead to vitreous hemorrhage, but more rare.
In diabetic patients, retinal neovascularization occurs is a harbinger of vitreous hemorrhage, without any treatment, about 27% occurred within 5 years vitreous hemorrhage, decreased vision caused by bleeding can not be absorbed by the blood of their own about 60% of patients recover .
Surgical bleeding of glass found in cataract surgery, retinal detachment repair surgery, vitreous surgery,
Blood accumulate in the vitreous cavity, will produce vitreous and retinal damage; the body's reaction will gradually clear the blood and its decomposition products.According to clinical observation and experimental research, a certain amount of blood into the vitreous, the vitreous concentration can gather, liquefaction and detachment, vitreous gel structure and loss of normal support and other functions of the retina, and biochemical characteristics have changed.
To the intravitreal injection of normal rabbit 0.1 ~ 0.2ml of autologous whole blood, 1 week can be observed separation between the vitreous and the retina, vitreous collapse to form tissue-like membrane surrounding the blood clot was false cystic this pseudomembrane and parts of the vitreous is not completely out of phase attachment.
After 2 weeks, almost completely divorced from the vitreous, and vitreous degeneration and liquefaction.
On the mechanism of blood there is no vitreous degeneration caused by exactly the same , long time, people think that the degradation of blood, the hemoglobin released from the iron ions play an important role of vitreous liquefaction, in order to test this hypothesis, we will Ferrous chloride solution was added to in vitro bovine vitreous, the result is equivalent to the blood concentration of ferrous iron soluti0mM 0.1ml, within 20 hours, the vitreous gel structure can be completely destroyed, so that all the condensation separation of collagen fibers, equivalent to the concentration of 1 % ferrous ions, but also make part of the collagen pool, iron ions on the vitreous special role, with hydroxyl free radicals produced on the rabbit in vivo experiments confirmed that, equivalent to 0.3 ~ ~ 0.7mol / L concentration (16.8 ~ 39.2


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