# shunt

(redirected from Blalock-Taussig shunt)
Also found in: Dictionary, Thesaurus, Medical, Acronyms, Wikipedia.
Related to Blalock-Taussig shunt: Blalock-Taussig operation, Norwood procedure

## shunt

1. a railway point
2. Electronics a low-resistance conductor connected in parallel across a device, circuit, or part of a circuit to provide an alternative path for a known fraction of the current
3. Med a channel that bypasses the normal circulation of the blood: a congenital abnormality or surgically induced
4. Brit informal a collision which occurs when a vehicle runs into the back of the vehicle in front
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

## Shunt

an electrical or magnetic conductor connected in parallel with an electric or magnetic circuit to divert part of the electric current or magnetic flux when it is undesirable or impossible to pass all the current or flux through the circuit. For example, when a shunt is used to extend the measuring range of an ammeter, the current Ix being measured is divided between the shunt and the ammeter in inverse proportion to their respective resistances, Rs and RA; in this case Ix = IA (1 + RA/RS) = IAks, where IA is the value of the current as determined from the ammeter readings and ks is the shunting factor. For convenience in making current measurements, the resistance of the shunt is chosen so that ks is equal to 10,100, or 1000.

Shunts are manufactured in the form of plates, bands, and wires, primarily of manganin or constantan (for electrical shunts) or of a soft magnetic material (for magnetic shunts).

## shunt

[shənt]
(civil engineering)
To shove or turn off to one side, as a car or train from one track to another.
(electricity)
A precision low-value resistor placed across the terminals of an ammeter to increase its range by allowing a known fraction of the circuit current to go around the meter. Also known as electric shunt.
To place one part in parallel with another.
(electromagnetism)
A piece of iron that provides a parallel path for magnetic flux around an air gap in a magnetic circuit.
(medicine)
A vascular passage by which blood is diverted from its normal circulatory path; frequently it is a surgical passage created between two blood vessels, but it may also be an anatomical feature.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## shunt

To divert, switch or bypass.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
Fortunately, we also found five patients (50.0%) in the unsuccessful subgroup with TOF, who underwent the palliative Blalock-Taussig shunt or the Glenn operation that benefited from balloon angioplasty.
Among these patients, 10 had initial success according to our criteria, and 13 patients, who had undergone the palliative Blalock-Taussig shunt procedure, had complete correction during the follow-up of this study.
Right subclavian artery angiogram confirmed complete occlusion of right-sided modified Blalock-Taussig shunt (Fig.
Occlusion or stenosis of a modified Blalock-Taussig shunt is not infrequent and have been reported in a variety of clinical settings (1).
Balloon angioplasty with or without thrombolytic therapy for acute occluded modified Blalock-Taussig shunt is an alternative to a second shunt procedure (1, 5).
Blalock-Taussig Shunts are used in patients with pulmonary stenosis to enhance systemic to pulmonary artery blood flow.
Modified Blalock-Taussig shunts: Results in infants less than 3 months of age.

Site: Follow: Share:
Open / Close