Apnea is a Greek word meaning “without wind.” Apnea, in the modern lexicon, refers to the cessation of breathing and is a reversible condition if caught early enough. Apneic events fall under one of three classifications—central, obstructive, or mixed. The event is classified as “central apnea” if the brain stops sending the signals to the chest muscles to expand, causing inhalation. This can o...

conclusions this study supports the preventative effects of aminophylline on apnea in extreme premature infants. in other words, the more premature an infant, the greater the preventative effect of aminophylline on the incidence of apnea and bradycardia. background a few studies have been carried on preventive drugs for apnea of preterm neonates. objectives this study aimed to assess the safety...

background : sleep apnea is accompanied by some cardiovascular complications. it has even been hypothesized that sleep apnea, itself, can induce some of these complications. given such controversies, we assessed the left ventricular mass index (lvmi) and systolic pulmonary artery pressure in patients with sleep apnea. methods: through convenience sampling, 56 patients with the obstructive sleep...

Sleep apnea is an entity characterized by repetitive upper airway obstruction resulting in nocturnal hypoxia and sleep fragmentation. It is estimated that 2%-4% of the middle-aged population has sleep apnea with a predilection in men relative to women. Risk factors of sleep apnea include obesity, gender, age, menopause, familial factors, craniofacial abnormalities, and alcohol. Sleep apnea has ...

Sleep apnea in craniofacial surgery was investigated. Between January 1999 and December 2003, 18 patients were measured at an at least 6-month interval before and after surgery. Eight patients underwent palatoplasty for cleft palate, and the other 10 patients underwent orthognathic surgery, syndromic craniosynostosis, and postpharyngeal flap surgery. All patients included in the study demonstra...

STUDY OBJECTIVE To examine the prevalence of risk of sleep apnea in patients undergoing elective surgery by using the Berlin Questionnaire. DESIGN Survey instrument. SETTINGS Preoperative assessment clinic. PATIENTS 305 surgical ASA physical status I, II, III, and IV patients. INTERVENTIONS Patients were screened with the Berlin questionnaire for obstructive sleep apnea. For patients de...

This paper describes the APSEN system, a pre-screening tool for detecting sleep apnea in a home environment. The system was designed and evaluated in two parts; the apnea detection using SpO2 and the posture detection using IR images. The two parts can work together or independently. During the preliminary study, the apnea detection algorithm was evaluated using an online database, and the righ...

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...

Sympathetic activation and sleep apnea are present in most patients with symptomatic systolic heart failure (HF). Acutely, obstructive and central apneas increase muscle sympathetic activity (MSNA) during sleep by eliciting recurrent hypoxia, hypercapnia, and arousal. In obstructive sleep apnea patients with normal systolic function, this increase persists after waking. Whether coexisting sleep...

Muscle sympathetic nerve activity (MSNA) and arterial pressure increase concomitantly during apnea, suggesting a possible overriding of arterial baroreflex inhibitory input to sympathoregulatory centers by apnea-induced excitatory mechanisms. Apnea termination is accompanied by strong sympathoinhibition while arterial pressure remains elevated. Therefore, we hypothesized that the sensitivity of...