hypoxia

(noun)

A condition in which tissues (especially the blood) are deprived of an adequate supply of oxygen; anoxia.

Related Terms

  • shock
  • hypoperfusion
  • peripheral chemoreceptors
  • central chemoreceptors
  • external intercostal muscles
  • coagulation
  • oxyhemoglobin

(noun)

A condition in which tissues are deprived of an adequate supply of oxygen for metabolic purposes; anoxia.

Related Terms

  • shock
  • hypoperfusion
  • peripheral chemoreceptors
  • central chemoreceptors
  • external intercostal muscles
  • coagulation
  • oxyhemoglobin

(noun)

A system-wide deficiency in the levels of oxygen that reach the tissues.

Related Terms

  • shock
  • hypoperfusion
  • peripheral chemoreceptors
  • central chemoreceptors
  • external intercostal muscles
  • coagulation
  • oxyhemoglobin

Examples of hypoxia in the following topics:

  • Hypoxia

    • Hypoxia, or hypoxiation, is inadequate oxygen supply to the body as a whole (generalized hypoxia) or a region of the body (tissue hypoxia).
    • Hypoxia, or hypoxiation, is a pathological condition in which the body as a whole (generalized hypoxia) or a region of the body (tissue hypoxia) is deprived of adequate oxygen supply.
    • Hypoxemic hypoxia is a generalized hypoxia, with an inadequate supply of oxygen to the body as a whole.
    • The term "hypoxemic hypoxia" specifies hypoxia caused by low partial pressure of oxygen in arterial blood.
    • In severe hypoxia, or hypoxia of very rapid onset, changes in levels of consciousness, seizures, coma, priapism, and death occur.
  • Chemoreceptor Regulation of Breathing

    • They can be desensitized over time from chronic hypoxia (oxygen deficiency) and increased carbon dioxide.
    • Chemoreceptor feedback also adjusts for oxygen levels to prevent hypoxia, though only the peripheral chemoreceptors sense oxygen levels.
  • Anemia

    • Anemia is a decrease in number of red blood cells or less than the normal quantity of hemoglobin in the blood resulting in tissue hypoxia.
    • Because hemoglobin (found inside RBCs) normally carries oxygen from the lungs to the tissues, anemia leads to hypoxia (lack of oxygen) in organs.
  • Carbon Monoxide Poisoning

    • This prevents oxygen binding to hemoglobin, reducing the oxygen-carrying capacity of the blood, leading to hypoxia.
    • Carbon monoxide also binds to cytochrome oxidase with less affinity than oxygen, so it is possible that it requires significant intracellular hypoxia before binding.
  • Respiratory Distress Syndrome

    • People with ARDS usually present with shortness of breath, tachypnea leading to hypoxia, and providing less oxygen to the brain occasionally causing confusion.
  • Pulmonary Edema

    • Pulmonary edema, especially in the acute setting, can lead to respiratory failure, cardiac arrest due to hypoxia, and death.
  • Teratogens

    • Cocaine appear to exert a number of its effects through peripheral vasoconstriction leading to fetal hypoxia.
  • RBC Life Cycle

    • Erythropoiesis can be stimulated by the hormone erythropoietin, which is synthesized by the kidney in response to hypoxia (systemic oxygen deficiency).
  • Other Hormone-Producing Structures

    • Erythropoietin is released in response to hypoxia in the renal circulation.
  • Short-Term Chemical Control

    • Some physiologists have suggested the lack of oxygen itself causes capillary beds to vasodilate by the smooth muscle hypoxia of the vessels in the region.
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