[Acute respiratory failure and noninvasive positive pressure ventilation treatment in patients with severe acute respiratory syndrome].

Objective: To describe the blood gas features and short-term outcomes of noninvasive positive pressure ventilation (NPPV) treatment for acute respiratory failure (ARF) in patients with severe acute respiratory syndrome (SARS) in this retrospective case series study sought.

Methods: Between April 22 and May 1, 2003, 120 clinically compatible SARS patients were admitted to a special hospital for infectious diseases in Beijing. All patients' records were reviewed.

[Influence of different sleep stages on respiratory regulation in normal humans].

Objective: To understand the influence of different sleep stages on respiratory regulation in normal people.

Methods: We measured ventilation (VE) and occlusion pressure (P0.1) responses to hyperoxia hypercapnia (deltaVE/deltaPaCO2, deltaP0.

[Respiratory control during sleep and the development of nocturnal hypoxia in patients with obstructive sleep apnea hypopnea syndrome].

Objective: It is assumed that the reduced ventilatory control during sleep may be related to the nocturnal hypoxia in patients with obstructive sleep apnea hypopnea syndrome (OSAHS) and daytime CO(2) retention.

Methods: Oxygen desaturation index (ODI(4)), sleep time spent when SaO(2) was below 90% (SIT(90)), the lowest SaO(2) (LSaO(2)) and the mean SaO(2) (MSaO(2)) during sleep were measured in 24 OSAHS patients with daytime PaCO(2) > or = 45 mm Hg and 39 with PaCO(2) < 45 mm Hg. Hypoxic (DeltaP(0.

[HLA-DRB and -DQB allele contribution to narcolepsy susceptibility in Chinese patients with narcolepsy].

Objectives: To study the association of narcolepsy with HLA class II alleles in Chinese narcoleptic patients.

Methods: 31 patients with narcolepsy underwent brain computed tomography (CT) scan and magnetic resonance imaging (MRI) testing. All patients received a MSLT test following a routine night's sleep, and serological HLA typing for HLA DR(2).