Shunt (medical)

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Auscultogram from normal and abnormal heart sounds

In medicine, a shunt is a hole or a small passage which moves, or allows movement of, fluid from one part of the body to another. The term may describe either congenital or acquired shunts; and acquired shunts (sometimes referred to as iatrogenic shunts) may be either biological or mechanical.

Possible Complications
  1. Bleeding from varices
  2. DIC (Disseminated intravascular coagulation)
  3. Infection
  4. Superior vena caval thrombosis
  5. Pulmonary edema
  • Pulmonary shunts exist when there is normal perfusion to an alveolus, but ventilation fails to supply the perfused region.
  • A portosystemic shunt (PSS), also known as a liver shunt, is a bypass of the liver by the body's circulatory system. It can be either a congenital or acquired condition. Congenital PSS is an uncommon condition in dogs and cats, found mainly in small dog breeds such as Miniature Schnauzers and Yorkshire Terriers, and in cats such as Persians, Himalayans, and mix breeds. Acquired PSS is also uncommon and is found in older dogs with liver disease causing portal hypertension, especially cirrhosis.
  • A portacaval shunt/ portal caval shunt is a treatment for high blood pressure in the liver.
  • VASP (Vesicoamniotic shunting procedure): Fetal lower urinary tract outflow obstruction prevents the unborn baby from passing urine. This can result in a reduction in the volume of amniotic fluid, and problems with the development of the baby’s lungs and kidneys. A vesico–amniotic shunt is a tube that it is inserted into the unborn baby’s bladder to drain the excess fluid into the surrounding space.[3]

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