sequestration


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sequestration

 [se″kwes-tra´shun]
1. abnormal separation of a part from a whole, as a portion of a bone by a pathologic process, or a portion of the circulating blood in a specific part occurring naturally or produced by application of a tourniquet.
2. isolation of a patient.
pulmonary sequestration loss of connection of lung tissue, and sometimes bronchi, with the bronchial tree and pulmonary veins, the tissue receiving its arterial supply from the systemic circulation. It may be completely separated anatomically and physiologically from normally connected lung (extralobar) or contiguous to and partly surrounded by normal lung (intralobar). Called also accessory lung.

se·ques·tra·tion

(sē'kwes-trā'shŭn),
1. Formation of a sequestrum.
2. Loss of blood or of its fluid content into spaces within the body so that it is withdrawn from the circulating volume, resulting in hemodynamic impairment, hypovolemia, hypotension, and reduced venous return to the heart.
[L. sequestratio, fr. sequestro, pp. -atus, to lay aside]

sequestration

/se·ques·tra·tion/ (se″kwes-tra´shun)
1. the formation of a sequestrum.
2. the isolation of a patient.
3. a net increase in the quantity of blood within a limited vascular area, occurring physiologically, with forward flow persisting or not, or produced artificially by the application of tourniquets.

pulmonary sequestration  loss of connection of lung tissue with the bronchial tree and the pulmonary veins.

sequestration

[sē′kwestrā′shən]
Etymology: L, sequestare, to lay aside
1 the isolation of a patient or group of patients.
2 a method of controlling hemorrhage of the head or trunk by isolating fluid in the arms and legs from the general circulation.
3 allowing blood from the systemic circulation to perfuse a nonfunctioning part of a lung.

sequestration

Medtalk
1. The development of a sequestrum. See Bronchopulmonary sequestration, Carbon sequestration, Pseudosequestration, Pulmonary sequestration.
2. The removal or isolation of a chemical, molecule, cell, or tissue from general access–eg, binding of certain proteins–eg, profilin, thymosin β4, Gc protein to G-actin to prevent polymerization. See Carbon sequestration.

se·ques·tra·tion

(sē'kwes-trā'shŭn)
1. Formation of a sequestrum.
2. Loss of blood or of its fluid content into spaces within the body so that it is withdrawn from the circulating volume, resulting in hemodynamic impairment, hypovolemia, hypotension, and reduced venous return to the heart.
[L. sequestratio, fr. sequestro, pp. -atus, to lay aside]

sequestration

Separation and physiological isolation of a portion of dead tissue from surrounding healthy tissue. The commonest example of sequestration is the formation of a bony SEQUESTRUM as a complication of OSTEOMYELITIS.

Sequestration

A process in which the spleen withdraws some normal blood cells from circulation and holds them in case the body needs extra blood in an emergency. In hypersplenism, the spleen sequesters too many blood cells.
Mentioned in: Splenectomy

se·ques·tra·tion

(sē'kwes-trā'shŭn)
1. Formation of a sequestrum.
2. Loss of blood or of its fluid content into body spaces so that it is withdrawn from the circulating volume, resulting in hemodynamic impairment, hypovolemia, hypotension, and reduced venous return to heart.
[L. sequestratio, fr. sequestro, pp. -atus, to lay aside]

sequestration

1. abnormal separation of a part from a whole, as a portion of a bone by a pathological process, or a portion of the circulating blood in a specific part occurring naturally or produced by application of a tourniquet.
2. isolation of a patient.

feline corneal sequestration
see corneal sequestrum.
pulmonary sequestration
loss of connection of lung tissue with the bronchial tree and the pulmonary veins.
References in periodicals archive ?
Pulmonary sequestration (PS) was first described by Rektorzik in 1861 and reported incidence is 0.
Geological carbon sequestration is a process of capturing CO2 from the exhaust of industries (fossil fuels), power plants and other sources before it is emitted to the atmosphere and injecting and storage into the appropriate impermeable rock formations present 1-4 km deep into the soil.
b) The goal of maximum sustained production of high-quality timber products is achieved while giving consideration to values relating to sequestration of carbon dioxide, recreation, watershed, wildlife, range and forage, fisheries, regional economic vitality, employment, and aesthetic enjoyment' (California Code of Regulations 2010).
Despite all the warnings, doomsday predictions, and lobbying efforts to stop sequestration, these spending reductions went into effect in 2013--not with a bang, but with a whimper of resignation.
Gollany wrestled with soil carbon measurement protocols when ARS agronomist Frank Young sent data to her from three Pacific Northwest production systems and enlisted her expertise to project how climate change would affect carbon sequestration levels in each practice.
What is clear, however, is that the consequences of sequestration are mounting, and they are having a deleterious effect on Americas military.
As a result, the president's request includes higher levels of investment in observations, science, and services relating to weather and climate than would have been possible under sequestration.
Sequestration forced the furloughs of 11,500 civilian employees on the base and wiped out 8.
CO2 separation, appropriate site selection, transportation, secure storage and afterward monitoring are the core processes in sequestration technology.
Following the collapse of a bipartisan commission in 2011 to tackle the large fiscal deficit, a large reduction in government spending or the so-called sequestration became mandatory on March 1, 2013.
The project led by Battelle and the Midwest Regional Carbon Sequestration Partnership (MRCSP) to inject one million tons of carbon dioxide into oil and gas fields in Michigan during the next four years is one of five recognized for endorsement by the Carbon Sequestration Leadership Forum.