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 Loss of blood or of its fluid content into spaces within the body so that it is withdrawn from the circulating volume, resulting in hemodynamic impairment, hypovolemia, hypotension, and reduced venous return to the heart.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 Loss of blood or of its fluid content into spaces within the body so that it is withdrawn from the circulating volume, resulting in hemodynamic impairment, hypovolemia, hypotension, and reduced venous return to the heart.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 ?
The two types of bronchopulmonary sequestration are intralobar (ILS), as in our patients, and extralobar sequestration (ELS).
Once the bacteria have colonized the sequestration, infection can progress because of the lack of normal bronchial drainage.
2) Cystic changes, as seen in patient 3, are usually multiple in nature and are usually surrounded by emphysematous changes, presumably due to air trapping from the sequestration itself (Figure 3).
Pulmonary sequestration indicates an abnormal pulmonary tissue that does not have a connection with the tracheabronchial tree and its blood supply is usually from an aberrant artery arising from the aorta or one of its branches.
Sequestration is a rare congenital anomaly and comprises 0.
Emphysematous changes in the surrounding lung parenchyma are characteristic CT findings of sequestration (8), (9).
Infection is the major complication of pulmonary sequestration and the sequestered tissue is frequently infected with bacterial pathogens.
There is only one previous report of Nocardia species infection with intralobar bronchopulmonary sequestration.
Our patient demonstrated the unique occurrence of simultaneous intralobar and extralobar sequestration with acute N.
Long-term cardiovascular consequences of undiagnosed intralobar pulmonary sequestration.
Romney has sought to tie Obama to sequestration, saying it is an example of the president's feckless leadership and inability to secure a better deal.
It's unthinkable to Virginia, to our employment needs, but it's also unthinkable to the ability and the commitment of America to maintain our liberty, with liberty for all," Romney said during a September 8 appearance in Virginia Beach, citing a Bob Woodward book that suggests the White House came up with the sequestration deal.