hypoventilation

hypoventilation /hy·po·ven·ti·la·tion/ (-ven″tĭ-la´shun) reduction in amount of air entering pulmonary alveoli.

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primary alveolar hypoventilation  impairment of automatic control of respiration, resulting in apnea during sleep.

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hy·po·ven·ti·la·tion (hp-vntl-shn)

n.

Reduced or deficient ventilation of the lungs, resulting in reduced aeration of blood in the lungs and an increased level of carbon dioxide in the blood.

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Hypoventilation

Reduced ventilation in the lungs' air sacs resulting in above normal carbon dioxide pressure.

Mentioned in: Inhalation Therapies

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hypoventilation

[-ven′tilā′shən]

Etymology: Gk, hypo + L, ventilare, to fan

an abnormal condition of the respiratory system that occurs when the volume of air that enters the alveoli and takes part in gas exchange is not adequate for the body's metabolic needs. It is characterized by cyanosis, polycythemia, increased PaCO₂, and generalized decreased respiratory function. Hypoventilation may be caused by an uneven distribution of inspired air (as in bronchitis), obesity, neuromuscular or skeletal disease affecting the thorax, decreased response of the respiratory center to carbon dioxide, or a reduced amount of functional lung tissue, as in atelectasis, emphysema, and pleural effusion. The results of hypoventilation are hypoxia, hypercapnia, pulmonary hypertension with cor pulmonale, and respiratory acidosis. Treatment includes weight reduction in cases of obesity, artificial respiration, and possibly tracheostomy. Compare hyperventilation. See also respiratory center.

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hypoventilation [hi″po-ven″tĭ-la´shun]

a state in which there is a reduced amount of air entering the pulmonary alveoli (decreased alveolar ventilation), which causes an increase in arterial carbon dioxide level. See also hypopnea and bradypnea.

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hypoventilation (hīˈ·pō·vēnˈ·t·lāˑ·shn),

n breathing dysfunction characterized by insufficient respiration, resulting in inadequate oxygenation and build-up of excess carbon dioxide in the body.

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hypoventilation,

n an abnormal condition of the respiratory system, characterized by cyanosis, polycythemia, increased carbon dioxide arterial tension, and generalized decreased respiratory function. Hypoventilation occurs when the volume of air that enters the alveoli and takes part in gas exchanges is not adequate for the metabolic needs of the body.

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hypoventilation

reduction in the amount of air entering the pulmonary alveoli.

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hypoventilation

Medtalk A ↓ in depth/frequency of respiration. Cf Hyperventilation.