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
Blakely Island (SENĆOŦEN: XEMXEMIȽĆ) in San Juan County, Washingto ...
, in Washington state
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Obstruction Islands, east of New Guinea
Medicine
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Obstructive jaundice
Jaundice, also known as icterus, is a yellowish or greenish pigmentation of the skin and sclera due to high bilirubin levels. Jaundice in adults is typically a sign indicating the presence of underlying diseases involving abnormal heme me ...
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Obstructive sleep apnea
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Airway obstruction
Airway obstruction is a blockage of respiration in the airway that hinders the free flow of air. It can be broadly classified into being either in the upper airway (UPA) or lower airway (LOA).
Airway obstruction is a life-threatening condition ...
, a respiratory problem
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Recurrent airway obstruction
Recurrent airway obstruction, also known as broken wind, heaves, wind-broke horse, or sometimes by the term usually reserved for humans, chronic obstructive pulmonary disease or disorder (COPD) – it is a respiratory disease or chronic conditio ...
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Bowel obstruction, a blockage of the intestines.
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Gastric outlet obstruction
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Distal intestinal obstruction syndrome
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Congenital lacrimal duct obstruction
Nasolacrimal duct obstruction is the obstruction of the nasolacrimal duct and may be either congenital or acquired. Obstruction of the nasolacrimal duct leads to the excess overflow of tears called epiphora.
Sign and symptoms
Excessive tear ...
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Bladder outlet obstruction
Bladder outlet obstruction (or obstructive uropathy) occurs when urine is unable to flow from the kidneys through the ureters and out of the bladder through the urethra. Decreased flow of urine leads to swelling of the urinary tract, called hydron ...
Politics and law
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Obstruction of justice
Obstruction of justice, in United States jurisdictions, is an act that involves unduly influencing, impeding, or otherwise interfering with the justice system, especially the legal and procedural tasks of prosecutors, investigators, or other gov ...
, the crime of interfering with law enforcement
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Obstructionism
Obstructionism is the practice of deliberately delaying or preventing a process or change, especially in politics.
As workplace aggression
An obstructionist causes problems. Neuman and Baron (1998) identify obstructionism as one of the three dim ...
, the practice of deliberately delaying or preventing a process or change, especially in politics
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Emergency Workers (Obstruction) Act 2006
The Emergency Services (Obstruction) Act 2006 (c 39) is an Act of the Parliament of the United Kingdom. It is intended to reduce the instances of obstruction of, or assaults on, emergency service personnel.
Sections 1 to 6 came into force on 20 ...
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 if ...
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 ex ...
, 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, abov ...
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Single Vegetative Obstruction Model
Sports
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Obstruction (baseball), when a fielder illegally hinders a baserunner
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Obstructing the field
Obstructing the field is one of the ten methods of dismissing a batsman in the sport of cricket. Either batsman can be given out if he wilfully attempts to obstruct or distract the fielding side by word or action. It is Law 37 of the Laws of c ...
See also
* ''
The Five Obstructions
''The Five Obstructions'' is a 2003 Danish documentary film directed by Lars von Trier and Jørgen Leth. The film is conceived as a documentary, but incorporates lengthy sections of experimental films produced by the filmmakers. The premise is th ...
'', a 2003 film
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USS ''Obstructor'', an American minelayer ship used in World War II
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