obstructive apnea

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cessation of breathing, especially during sleep. The most common type is adult sleep apnea. Central apnea in which there is failure of the central nervous system drive to respiration sometimes occurs in infants younger than 40 weeks after the date of conception.
adult sleep apnea frequent and prolonged episodes in which breathing stops during sleep. Diagnosis is confirmed by monitoring the subject during sleep for periods of apnea and lowered blood oxygen levels. Sleep apnea is divided into three categories: (1) obstructive, resulting from obstruction of the upper airways; (2) central, caused by some pathology in the brain's respiratory control center; and (3) mixed, a combination of the two (see above).
Treatment. Obstructive and mixed types are amenable to therapy. Since many sleep apnea patients are overweight, weight loss improves the symptoms. Central sleep apnea is the most difficult to control. Medications to stimulate breathing have not proven beneficial. Mechanical ventilation or administration of oxygen during the night may help some patients.

The most common treatment for obstructive sleep apnea is nasal continuous positive airway pressure, which the patient uses during sleep; the positive pressure exerted prevents the airway from obstructing. Another method that may be tried is a dental appliance to move the jaw forward during sleep. In the most refractory cases, such as when an anatomical airway obstruction can be demonstrated, surgery to remove it may be performed after consultation with a surgeon experienced in evaluating and treating such obstructions. Another treatment that is occasionally used is insertion of a special type of tracheostomy tube that can be plugged during the day for normal use of the upper airway and opened at night to bypass upper airway obstruction
central apnea (central sleep apnea) see adult sleep apnea.
deglutition apnea a temporary arrest of the activity of the respiratory nerve center during an act of swallowing.
initial apnea a condition in which a newborn fails to establish sustained respiration within two minutes of delivery.
late apnea cessation of respiration in a newborn for more than 45 seconds after spontaneous breathing has been established and sustained.
mixed apnea see adult sleep apnea.
obstructive apnea (obstructive sleep apnea) see adult sleep apnea.
primary apnea cessation of breathing resulting when a fetus or newborn infant is deprived of oxygen; exposure to oxygen and stimulation usually restore respiration.
prolonged infantile apnea sudden infant death syndrome.
secondary apnea a period of time following primary apnea during which continued asphyxia of the fetus or newborn, with a fall in blood pressure and heart rate, necessitates artificial ventilation for resuscitation and reestablishment of ventilation.
sleep apnea transient periods when breathing stops during sleep; see adult sleep apnea.

ob·struc·tive ap·ne·a

, peripheral apnea (ŏb-strŭk'tiv ap'nē-ă, pĕr-if'ĕr-ăl)
Apnea either as the result of obstruction of the air passages or inadequate respiratory muscle activity.

obstructive apnea

Absent or dysfunctional breathing that occurs when the upper airway is intermittently blocked during sleep. Observation of the patient reveals vigorous but ineffective respiratory efforts, often with loud snoring or snorting.
See also: apnea
References in periodicals archive ?
found that, in a relatively small study, 10 of 28 patients with TBI had sleep apnea and that the majority of these events were central apneas rather than obstructive apneas [87].
Initial preclinical results show that the technology can successfully detect onset, duration and termination of any form of respiratory distress such as hypopnea, obstructive apnea, and central apnea.
Obstructive apnea is often terminated by an arousal, which is accompanied with an increase in the sympathetic activity (8).
Six weeks later, a sleep study revealed that the patient still had obstructive apnea.
Rachel suffers from a condition known as central sleep apnea, which means her brain tells her to stop breathing while she sleeps, while her brother has obstructive apnea, which forces his throat to close up.
Patients who are allergic to ragweed have longer and more frequent episodes of obstructive apnea during their acute season than they do during their off season, which might be attributable to increased nasal resistance.
Respiratory patterns reflecting intercostal/abdominal charges, summed in a 3rd channel, identify obstructive apnea.
Richard, meanwhile, has obstructive apnea, which forces his throat to close.
Orr et al reported that three patients with profound myxedema experienced a nearly complete resolution of the obstructive apnea after administration of levothyroxine.
Respiratory patterns reflecting intercostal/abdominal changes, summed in a 3rd channel, identify obstructive apnea.
Rachel, who has a condition known as sleep apnea, which means her brain tells her to stop breathing while she sleeps, and Richard, who has obstructive apnea, which forces the back of his throat to close, are due to fly out in a month's time to the clinic in Columbus, Ohio, for assessment.
Rachel and her brother Richard, 18, who has obstructive apnea, which forces his throat to close, will both be flying to Ohio in a couple of months time, with their parents, for extensive assessments at a sleep disorder centre.