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    Category: Circulatory System Topics

    *Circulatory System

    The cardiovascular system is the plumbing of the body.  This is the system that distributes food, oxygen, communication molecules (hormones), repair …
    Doc-t April 25, 2020
    0 Comments

    Dependent Edema

    Blood, like any liquid, falls to the lowest point. When the liquid part of blood leaks out of the blood vessels, it always gravitates to the low point…
    Doc-t January 2, 2015
    0 Comments

    Hematology In Horses

    Hematology is the study of the blood in all aspects, including the type of cells, the electrolytes, the inflammatory cells, the fats and sugars, the…

    Doc-t September 29, 2020
    0 Comments

    Hematomas And Seromas

    Hematomas And Seromas In Horses
    Doc-t April 25, 2020
    0 Comments

    Lymphangitis

    Inflammation of the lymphatic system can be severe and life threatening and requires immediate medical attention.
    Doc-t January 31, 2015
    0 Comments

    Mitral Valve Insufficiency

    [x_alert type=“info” close="false" heading="Overview"]Though rare in horses, the chief complaint can be a blue tongue.[/x_alert]
    Doc-t January 29, 2015
    0 Comments

    Nosebleed (Epistaxis)

    Blood coming out of the nostrils can originate anywhere in the respiratory tract from the nostrils to the lungs.
    Doc-t January 23, 2015
    0 Comments

    Petechiae

    Small red spots on the gums and mucous membranes behind the lips indicates inflammation of the blood vessels in the horse causing them to leak small p…
    Doc-t January 21, 2015
    0 Comments

    Septicemia

    An excerpt is coming soon.
    Doc-t May 11, 2020
    0 Comments

    Sheath Edema

    The sheath is at the farthest point from the heart and damage to the blood flow in castrated males can sometimes prevent the normal flow of blood lead…
    Doc-t January 16, 2015
    2 Comments

    Stocking Up

    Stocking Up In Horses
    Doc-t February 12, 2015
    0 Comments

    Thrombosis

    The veins of horses normally do not have obstructions but when they become occluded either partially or fully, then the blood flow ceases and they bec…
    Doc-t January 5, 2015
    0 Comments

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    Our website and forums do not supply medical care or medical services. For medical services or medical emergencies, please call your veterinarian immediately. (more)

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    Forum Description

    Thrombosis occurs within a vessel of the circulatory system that clots blood, occluding the flow through the vessel. If it is a major vessel (artery), there is an immediate loss of organ function and even death. This is a common cause of death in humans (stroke).

    In horses, thrombosis is usually a sequella from trauma to an area under the skin directly affecting a vessel. The result can be seen as an engorged vein or artery under the skin. As a safety feature in horses (and all animals), there is redundancy in vessel architecture, allowing for collateral circulation to maintain the health of the area.

    The term "corded" applies to an occluded jugular vein that lies in the jugular groove along the lower portion of the neck. The jugular vein is the most common site for intravenous (IV) injections. Damage from the needle or the materials injected into the vein will occlude this major vein draining the head and causing the vein to become hard - like feeling a large cord under the skin in the groove. Because there is a second jugular vein on the other side of the neck with enough capacity to drain the blood from the head, the horse doesn't experience any problems with the other vein being occluded.

    Circulatory
    System & disease topics

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    I believe this is a vein thrombosis (a blockage in the flow of blood in a vein causing the blocked blood fo enlarge the vessel) but is undiagnosed. This was seen at a veterinary university where it was diagnosed as a blocked salivary duct by ultrasonography. They dissolved the blockage (by ultrasound I presume) but it did not resolve this swelling. It fluctuates in size but not by much. The owner has not investigated this any further and it does not seem to bother the horse. There was plenty of saliva in the mouth while floating.
    A filled vein from a thrombosis (occluding blood clot) from an unknown cause.

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