Category: A

  • Apneumatosis

    Noninflation of air cells of the lung; congenital atelectasis.  

  • Apneumatic

    Free of air, as in a collapsed lung.  

  • Apnea test

    A test used to determine whether a comatose person receiving life support has suffered brain death.  

  • Apnea monitoring

    Monitoring the respiratory movements, especially of infants. This may be done by use of an apnea alarm mattress, or devices to measure the infant’s thoracic and abdominal movements and heart rate.  

  • Apnea alarm mattress

    A mattress that is designed to sound an alarm when the infant lying on it ceases to breathe.  

  • Apnea of prematurity

    A condition of the premature newborn, marked by repeated episodes of apnea lasting longer than 20 sec. The diagnosis of AOP is one of exclusion, made when no treatable cause can be found. Increased frequency of apneic episodesdirectly relates to the degree of prematurity. AOP is not an independent risk factor for sudden infant death…

  • Apnea hypopnea index

    A measure of sleep-disordered breathing based on the number of episodes of apnea or periods of inadequate ventilation during sleep.  

  • Apley’s scratch test

    A test of shoulder function with several variations designed to detect asymmetries in range of motion observed during adduction, flexion, extension, internal rotation, and external rotation. The patient performs instructed movements involving positioning the hand to touch the opposite shoulder in the scapular region from behind the back and over the shoulder.  

  • Aplasia cutis congenita

    Defective development of a localized area of the skin, usually on the scalp. The area is usually covered by a thin, translucent membrane.  

  • Aplasia axialis extracorticalis congenita

    Congenital defect of the axon formation on the surface of the cerebral cortex.