Related Experiment Video
Updated: May 28, 2026
08:22
Assessment and Characterization of Hyaloid Vessels in Mice
Published on: May 15, 2019
[Vitreous haemorrhage associated with persistent hyaloid artery]
C Azrak1, E Campos-Mollo, M Lledó-Riquelme
1Servicio de Oftalmología, Hospital General Universitario de Elche, Alicante, España.
Archivos De La Sociedad Espanola De Oftalmologia
|October 19, 2011
Summary
Persistent hyaloid artery (PHA) hemorrhage is rare. Optical coherence tomography (OCT) and Doppler ultrasound can help diagnose vitreous hemorrhage associated with PHA.
Area of Science:
- Ophthalmology
- Medical Imaging
Background:
- Persistent hyaloid artery (PHA) hemorrhage is an uncommon vascular anomaly.
- This condition can lead to visual disturbances.
Observation:
- A 52-year-old female presented with blurred vision in her amblyopic eye.
- Biomicroscopy revealed a blood-filled PHA inserted into the posterior crystalloid.
- Ophthalmoscopy showed mild vitreous hemorrhage.
Findings:
- Optical coherence tomography (OCT) visualized a tubular structure with hypo-reflexivity within the PHA.
- Doppler ultrasound did not detect active blood flow within the PHA.
Implications:
- Non-invasive imaging, including OCT and Doppler ultrasound, can be valuable for studying vitreous hemorrhage linked to PHA.
- These techniques aid in the diagnosis and understanding of this rare condition.
Related Concept Videos
01:25Glaucoma: Overview
Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
01:17Hemorrhagic Stroke l: Introduction
A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...
01:29Hemorrhagic Stroke ll: Pathophysiology
A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...
01:27Diabetic Retinopathy
DefinitionDiabetic retinopathy is a microvascular complication of diabetes affecting the retinal blood vessels.Risk FactorsDiabetic retinopathy is present in almost all individuals with type 1 diabetes and more than 60% of those with type 2 diabetes after two decades of disease.The risk increases with poor glycemic control, hypertension, dyslipidemia, smoking, pregnancy, and puberty.Although cataracts and glaucoma are also more frequent in people with diabetes, retinopathy remains the leading...
01:28Angle Closure Glaucoma: Treatment
Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
01:24Esophageal Varices-I: Introduction
Esophageal varices are dilated, tortuous veins which are found mainly in the submucosa of the lower esophagus but which may also appear higher up or extend into the stomach. They develop due to increased pressure in the portal venous system, often as a result of liver cirrhosis. This condition scars and damages the liver, impeding normal blood flow through the portal vein. To compensate, blood seeks alternative pathways, forming fragile new vessels (varices) in the esophagus and stomach. These...