Cardiogenic Oscillations and Airway Patency

Impact of endoscopic endonasal pituitary surgery on nasal airway patency

  Background: Nose is used as a corridor in endoscopic endonasal transsphenoidal approach (EETSA) for pituitary adenoma. Thus, it may affect the nasal airway patency, function and sinonasal-related quality of life. The aim of this study is to objectively and subjectively evaluate these effects.   Methods: In this prospective study, 43 patients with pituitary adenoma who were c...

Upper airway patency during apnoea of prematurity.

Twenty four preterm infants (median birth weight 1120 g and gestation 29 weeks) were studied on 83 occasions by measuring upper airway airflow. Airway patency was detected by the transmission of cardiac impulse up the airway and airway closure by its absence. A total of 309 apnoeas of at least five seconds' duration were recorded. One hundred and eighty (58.0%) were central, 109 (35.5%) mixed, ...

Central mechanisms controlling upper airway patency

SLEEP and SLEEP DISORDERS Neuromuscular Mechanisms of Upper Airway Patency

The pathophysiological mechanisms involved in obstructive sleep apnoea (OSA) are complex and not fully understood. Critical upper airway (UA) narrowing/collapse usually occurs in the oropharynx, between the nasal choanae and epiglottis, an area lacking rigid support. Patency of this vulnerable segment is dependent on the action of pharyngeal dilator and abductor muscles that are normally activa...

Cardiogenic oscillations on the airflow signal during continuous positive airway pressure as a marker of central apnea.

UNLABELLED Therapeutic decisions in patients with sleep apnea (eg, adjustment of continuous positive airway pressure [CPAP]) depend on differentiating central from obstructive apnea. Obstructive apnea is defined by cessation of airflow in the presence of continued respiratory effort, which is conventionally inferred from chest wall movement or intrathoracic pressure swings. Cardiogenic oscillat...