Obstruction may refer to:
Places
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Obstruction Island
Obstruction Island is one of the San Juan Islands in San Juan County, Washington, United States. It lies off the southeast tip of Orcas Island, between it and Blakely Island. Obstruction Island has a land area of 0.882 km² (0.3406 sq mi, or 2 ...
, in Washington state
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Obstruction Islands
The Obstruction Islands are an archipelago east of New Guinea island, located within Milne Bay Province in the southeastern region of Papua New Guinea.
Geography
The islands are located between the Eastern Cape of New Guinea and Nuakata Island. ...
, east of New Guinea
Medicine
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Obstructive jaundice
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Obstructive sleep apnea
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Airway obstruction, a respiratory problem
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Recurrent airway obstruction
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Bowel obstruction
Bowel obstruction, also known as intestinal obstruction, is a mechanical or functional obstruction of the intestines which prevents the normal movement of the products of digestion. Either the small bowel or large bowel may be affected. Signs ...
, a blockage of the intestines.
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Gastric outlet obstruction
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Distal intestinal obstruction syndrome
Distal intestinal obstruction syndrome (DIOS) involves obstruction of the distal part of the small intestines by thickened intestinal content and occurs in about 20% of mainly adult individuals with cystic fibrosis. DIOS was previously known as ...
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Congenital lacrimal duct obstruction
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Bladder outlet obstruction
Politics and law
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Obstruction of justice, the crime of interfering with law enforcement
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Obstructionism, the practice of deliberately delaying or preventing a process or change, especially in politics
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Emergency Workers (Obstruction) Act 2006
Science and mathematics
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Obstruction set in
forbidden graph characterization
In graph theory, a branch of mathematics, many important families of graphs can be described by a finite set of individual graphs that do not belong to the family and further exclude all graphs from the family which contain any of these forbidde ...
s, in the study of
graph minor
In graph theory, an undirected graph is called a minor of the graph if can be formed from by deleting edges and vertices and by contracting edges.
The theory of graph minors began with Wagner's theorem that a graph is planar if and only i ...
s in
graph theory
In mathematics, graph theory is the study of '' graphs'', which are mathematical structures used to model pairwise relations between objects. A graph in this context is made up of '' vertices'' (also called ''nodes'' or ''points'') which are conn ...
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Obstruction theory In mathematics, obstruction theory is a name given to two different mathematical theories, both of which yield cohomological invariants.
In the original work of Stiefel and Whitney, characteristic classes were defined as obstructions to the ...
, in mathematics
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Propagation path obstruction In telecommunication, a propagation path obstruction is a man-made or natural physical feature that lies near enough to a radio path to cause a measurable effect on path loss, exclusive of reflection effects. An obstruction may lie to the side, ...
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Single Vegetative Obstruction Model
Sports
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Obstruction (baseball)
In baseball, obstruction is when a fielder illegally hinders a baserunner running within the basepath. Baserunners are generally permitted to run from base to base without being physically blocked or hindered by a fielder. The only time that a f ...
, when a fielder illegally hinders a baserunner
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Obstructing the field
See also
* ''
The Five Obstructions'', a 2003 film
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USS ''Obstructor'', an American minelayer ship used in World War II
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