What does artery occlusion mean?
An occlusion is a complete or partial blockage of a blood vessel. While occlusions can happen in both veins and arteries, the more serious ones occur in the arteries. An occlusion can reduce or even stop the flow of oxygen-rich blood to downstream vital tissues like the heart, brain, or extremities.
What is retinal vein occlusion?
Retinal vein occlusion is a blockage of the small veins that carry blood away from the retina. The retina is the layer of tissue at the back of the inner eye that converts light images to nerve signals and sends them to the brain.
Is an occlusion a stroke?
Central retinal artery occlusion (CRAO) is a form of acute ischemic stroke that causes severe visual loss and is a harbinger of further cerebrovascular and cardiovascular events.
What is the most common cause of retinal artery occlusion?
An embolism is the most common cause of CRAO. The three main types of emboli are cholesterol, calcium, and platelet-fibrin. Both cholesterol and platelet-fibrin emboli typically arise from atheromas in the carotid arteries.
What causes artery occlusion?
The blockage usually comes from a blood clot or cholesterol deposit in your blood vessel. This is a serious condition. You should seek prompt medical attention. If a blood clot breaks free and moves to the brain, it could cause a stroke.
What does MCH mean in a blood test?
on January 24, 2021 Mean corpuscular hemoglobin (MCH) in a blood test refers to the average amount of hemoglobin in a person’s red blood cells. Hemoglobin is a protein that carries oxygen around the human body. MCH is one of the standard measurements in a complete blood count test.
What is the medical definition of occlusion?
1 (in anatomy) a blockage in a canal, vessel, or passage of the body; the state of being closed. 2 (in dentistry) any contact between the incising or masticating surfaces of the maxillary and mandibular teeth. occlude, v., occlusive, adj.
What does it mean when your MCH is low?
MCH is calculated by dividing the amount of hemoglobin in a given volume of blood by the number of red blood cells present. The normal range for MCH is between 27.5 and 33.2 picograms (pg). An MCH value calculated below 27.5 pg is considered low MCH. This means that there’s a low amount of hemoglobin present per red blood cell.
What is MCh MCV and MCHC?
Together, MCH, MCV, and MCHC are sometimes referred to as red blood cell indices. MCV is a measurement of the average size of your red blood cells. MCH results tend to mirror MCV results. This is because bigger red blood cells generally contain more hemoglobin while smaller red blood cells tend to have less.