Emergency Central is a collection of disease, drug, and test information including 5-Minute Emergency Medicine Consult, Davis’s Drug, McGraw-Hill Medical’s Diagnosaurus®, Pocket Guide to Diagnostic Tests, and MEDLINE Journals created for emergency medicine professionals. Explore these free sample topics:
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- Blood in anterior chamber (AC) of the eye (between iris and cornea).
- Hyphema: Grossly visible layering of blood.
- Microhyphema: Suspended RBCs visible by slit-lamp only.
- Genetic predisposition is related to hereditary blood dyscrasias (see below).
- Blunt trauma: Most common (70–80%).
- Anteroposterior compression of the globe with simultaneous equatorial globe expansion causing rupture of iris stromal/ciliary body vessels
- Penetrating trauma: Direct injury to stromal vessels or sudden ocular decompression.
- Spontaneous: Less common, lower incidence of complications:
- Metastatic tumors
- Blood dyscrasias:
- Von Willebrand disease
- Blood thinners: Aspirin, Coumadin, heparin
- Neovascularization of iris: In proliferative diabetic retinopathy, retinal vein occlusion, carotid stenosis.
- Postsurgical: Cataract extraction, trabeculectomy, pars plana vitrectomy.
In children with no history of trauma, suspect child abuse.