right-to-left shunt

shunt (shunt)

1. to turn to one side; to bypass.

2. a passage or anastomosis between two natural channels, especially between blood vessels, formed physiologically or anomalously.

3. a surgically created anastomosis; also, the operation of forming a shunt.

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arteriovenous shunt 

1. the diversion of blood from an artery directly to a vein.

2. a U-shaped plastic tube inserted between an artery and a vein; usually to allow repeated access to the arterial system for hemodialysis.

Blalock-Taussig shunt  see under operation.

cardiovascular shunt  diversion of the blood flow through an anomalous opening from the left side of the heart to the right side or from the systemic to the pulmonary circulation (left-to-right s.), or from the right side to the left side or from the pulmonary to the systemic circulation (right-to-left s.) .

left-to-right shunt  see cardiovascular s.

LeVeen peritoneovenous shunt  continuous shunting of ascites fluid from the peritoneal cavity to the jugular vein by means of a surgically implanted subcutaneous plastic tube.

portacaval shunt  surgical anastomosis of the portal vein and the vena cava.

Shunts diverting portal venous blood flow from the liver. (A), Portacaval shunt; (B), splenorenal shunt.

right-to-left shunt  see cardiovascular s.

splenorenal shunt  removal of the spleen with anastomosis of the splenic vein to the left renal vein.

Shunts diverting portal venous blood flow from the liver. (A), Portacaval shunt; (B), splenorenal shunt.

ventriculoatrial shunt  the surgical creation of a communication between a cerebral ventricle and a cardiac atrium by means of a plastic tube, to permit drainage of cerebrospinal fluid for relief of hydrocephalus.

ventriculoperitoneal shunt  a communication between a cerebral ventricle and the peritoneum by means of plastic tubing; done for the relief of hydrocephalus.

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right-to-left shunt

n.

1. The passage of blood from the right side of the heart into the left, as through a septal defect.

2. The passage of blood from the pulmonary artery into the aorta, as through a patent ductus arteriosus.

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right-to-left shunt

Etymology: ME, shunten

a shunt in which unoxygenated venous blood bypasses the lungs and directly enters the arterial system, as in the tetralogy of Fallot and other conditions.

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shunt

1. to turn to one side; to divert; to bypass.

2. a passage or anastomosis between two natural channels, especially between blood vessels. Such structures may be formed physiologically (e.g. to bypass a thrombosis), or they may be structural anomalies.

3. a surgical anastomosis.

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arteriovenous (A-V) shunt

a U-shaped or straight tube inserted between an artery and a vein (usually between the radial artery and cephalic vein), bypassing the capillary network; commonly done to allow repeated access to the arterial system for the purpose of hemodialysis.

cardiovascular shunt

an abnormality of the blood flow between the sides of the heart or between the systemic and pulmonary circulation; see left-to-right shunt (below) and right-to-left shunt (below).

left-to-right shunt

diversion of blood from the left side of the heart to the right side, or from the systemic to the pulmonary circulation through an anomalous opening such as a septal defect or patent ductus arteriosus.

LeVeen shunt

a device whose purpose is to remove excess ascitic fluid from the peritoneal cavity and return it to the venous system. Called also peritoneal-venous shunt.

peritoneal-venous shunt

see LeVeen shunt (above).

pleuroperitoneal shunt

a catheter placed to transfer pleural fluid into the peritoneal cavity; requires manual pumping.

portacaval shunt, postcaval shunt

see portacaval shunt.

reversed shunt

right-to-left shunt.

right-to-left shunt

diversion of blood from the right side of the heart to the left side or from the pulmonary to the systemic circulation through an anomalous opening such as septal defect or patent ductus arteriosus.

ventriculovenous shunt

a surgical procedure used in the treatment of hydrocephalus.