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circuit

 [ser´kut]
the round or course traversed by an electrical current. The circuit is said to be closed when it is continuous, so that the current may pass through it; it is open, broken, or interrupted when it is not continuous and the current cannot pass through it.
reentrant circuit (reentry circuit) the circuit formed by the circulating impulse in reentry.

cir·cuit

(ser'kit),
The path or course of flow of cases or electric or other currents.
[L. circuitus, a going round, fr. circum, around, + eo, pp. itus, to go]

circuit

/cir·cuit/ (ser´kit) [L.] the round or course traversed by an electric current.
reverberating circuit  a neuronal pathway arranged in a circle so that impulses are recycled to cause positive feedback or reverberation.
reentrant circuit  the circuit formed by the circulating impulse in reentry.

circuit

[sur′kit]
Etymology: L, circuitus, going around
a course or pathway, particularly one through which an electric current passes. Current passes through a closed or continuous circuit and stops if the circuit is open, interrupted, or broken. See also volt.

cir·cuit

(sĭr'kŭt)
The path or course of flow of electric or other currents.
[L. circuitus, a going round, fr. circum, around, + eo, pp. itus, to go]

circuit

a round course, or course followed by, for example, electrical current, anesthetic gas, a traveling judge.

Bain coaxial circuit
a variant of the T-piece circuit of delivery of anesthetic gas in which the fresh gas passes up a central tube and the expired gas passes out through the outer sleeve.
breathing circuit
of an anesthetic machine is the pathway by which the volatile anesthetic agent and oxygen are conveyed to the patient and carbon dioxide is removed. The two methods for removal of carbon dioxide are that of venting all expired gases to the exterior, and the method of absorbing the CO2 chemically and rebreathing the expired gas. The two basic circuits are the open circuit in which the patient has access to environmental air as well as the anesthetic-oxygen mixture and exhales into the environment, and the closed system in which all gases are rebreathed. The latter may be a to-and-fro system or a circle system, the latter based on the use of unidirectional valves to ensure that the gases always pass in the correct direction. See also Bain coaxial circuit (above), circle breathing circuit (below), coaxial circuit (below), Lack circuit (below), Magill circuit (below), schimmelbusch mask, T-piece circuit (below).
circle breathing circuit
in an anesthetic machine; the flow of gases is directed by an inclusion in the system of two unidirectional valves, one in an expiratory and one in an inspiratory tube. The rebreathing bag and the canister of sodalime for CO2 absorption are located between the two tubes.
coaxial circuit
a system for the delivery of gaseous anesthetic which has separate conduits for fresh gas and expired air and is essentially the same as the T-piece system except that one conduit is inside the other. An attractive system because the exhaust gases can be ducted to the exterior.
Lack circuit
a coaxial breathing circuit used in anesthesia. Fresh gas flows up the outer sleeve, expired air and gas pass down the inner tube.
Magill circuit
a breathing circuit used in anesthesia. It includes a reservoir bag, wide-bore corrugated tubing and a spring-loaded expiratory valve. It is a semiclosed system in which rebreathing is prevented by having the gas flow rate from the cylinders slightly in excess of the patient's minute respiratory volume.
Mapleson circuit
an anesthetic breathing circuit in which the fresh gas flow is used to remove exhaled carbon dioxide. The Mapleson A circuit is called also the Magill circuit (above), Mapleson D circuit is called also the Bain circuit (above), and the jackson-rees t-piece is the Mapleson F circuit.
non-rebreathing circuit
anesthetic breathing circuits in which exhaled gases are discharged to the environment and do not pass back to the patient. See Magill circuit (above).
parallel circuit
a variation on the Bain and Lack circuits (above) in which there are two tubes running side by side instead of one inside the other.
rebreathing circuit
anesthetic breathing circuits in which the exhaled gas is recirculated to the patient with CO2 removed.
T-piece circuit
a breathing circuit used in anesthesia. Shaped like a T. The exhaled gases are passed into a reservoir tube from which they are pushed by fresh gas from the anesthetic machine as it passes from the stem to the other arm of the T during expiration. There are no valves.
x-ray circuit
a complete path along which an electrical current flows. In its simplest form it includes a source of electrons (power source), a load or resistance, and a conductor.
References in periodicals archive ?
And Lorraine landed lucky when 14-1 shot Circuitous raced to victory.
Circuitous was having his third run for his new trainer when making all in first-time blinkers to repel subsequent winners Salik Tag and Meandmyshadow in ready style at Carlisle in August and has followed that with a couple of solid efforts in handicaps over this course and distance.
Fake or substandard versions of medicines are often hidden in cargos taking circuitous routes to mask their country of origin as part of criminal activity worth billions, they add.
Wales) does not describe the manifestation of depression in the past in order to trace the circuitous route by which modern scientists discovered the truth.
In a statement, the Massachusetts Democrat said, "Leaders from WBCs around the country have charged that the application process for grants is arduous with circuitous procedures that result in delayed grant disbursals for qualified centers.
Cars are often parked there and I have often seen them drive off the High Street across the pavement and into Dovecot Street and vice versa, saving themselves a circuitous journey of about a mile.
Alas, it took a circuitous route meaning we missed half an hour of the first speaker.
In its filing with DOT, Northwest Airlines declared that its "Detroit hub wins hands down" for the new service, saying it will provide better connections than others, "especially DFW which is absurdly circuitous for large areas of the United States.
When my circuitous research finally revealed the identity of the first slave-owner who was also an ancestor of mine, I cringed and wishing it wasn't so.
Linked by a circuitous access road, these form a self-contained micro campus among the luxuriant eucalyptus.
One impediment to making advances has been a primary focus on exposures and toxicants that has sometimes led investigators supported by the NIEHS on a circuitous and inefficient path toward understanding human health and disease.
DeGeneres noted the circuitous route some of the nominees took to arrive at the Kodak Theatre Sunday night.