Objective Determine if anatomic dimensions of airway structures are associated with airway obstruction in obstructive sleep apnea (OSA) patients. Methods Twenty-eight subjects with (n = 14) and without (n = 14) OSA as determined by clinical symptoms and sleep studies; volunteer sample. Skeletal and soft tissue dimensions were measured from radiocephalometry and magnetic resonance imaging. The...

We studied the effects of positive end-expiratory pressure (PEEP) applied by the ventilator on respiratory mechanics in ventilated patients with chronic obstructive pulmonary disease (COPD). Airway pressures, relaxed expiratory flow-volume curves and end-expiratory volumes (EEV) were measured. In all patients investigated without PEEP applied by the ventilator, an intrinsic PEEP level (PEEPi) a...

Correspondence to: Dr Antonia Koutsoukou, Critical Care Department, Evangelismos General Hospital, 45-47, Ipsilandou Street, Athens, GR-10675 Greece Tel.: +30-210-7201919 Fax: +30-210-7216503 e-mail: [email protected] summArY. Morbidly obese subjects are characterized by important changes in respiratory function both during spontaneous breathing as well as during general anesthesia and mechan...

INTRODUCTION Upper airway measurement can be important for the diagnosis of breathing disorders. Acoustic reflection (AR) is an accepted tool for studying the airway. Our objective was to investigate the differences between cone-beam computed tomography (CBCT) and AR in calculating airway volumes and areas. METHODS Subjects with prescribed CBCT images as part of their records were also asked ...

INTRODUCTION The objective of this laboratory study was to measure the effect of decreased lung compliance and endotracheal tube (ETT) leakage on measured exhaled tidal volume at the airway and at the ventilator, in a research study with a test lung. METHODS The subjects were infant, adult and pediatric test lungs. In the test lung model, lung compliances were set to normal and to levels seen...

UNLABELLED Acoustic reflectometry, a noninvasive test that produces a length versus cross-sectional area map of the airway, has been used to identify difficult-to-tracheally intubate patients in a small retrospective case-control study. A critical airway volume of 40.2 mL separated those patients whose tracheas were impossible to intubate from those who were easily intubated. To determine if th...

BACKGROUND Closed endotracheal suctioning during mechanical ventilation is increasingly used, but its impact on ventilator function has not been fully studied. METHODS We evaluated the impact of closed suctioning with 11 critical-care ventilators, during assisted ventilation in pressure-support mode, pressure-assist/control mode, volume-assist/control mode, and during continuous positive airw...

This analysis was conducted to evaluate the prevalence of airway obstruction among Latino poultry processing workers. Data were collected from 279 poultry processing workers and 222 other manual laborers via spirometry and interviewer-administered questionnaires. Participants employed in poultry processing reported the activities they perform at work. Participants with forced expiratory volume ...

PURPOSE To evaluate pharyngeal airway volume changes after forward movements of the maxilla or mandible, or both, using cone-beam computed tomography. PATIENTS AND METHODS A retrospective evaluation of 30 patients who underwent maxillomandibular advancement, maxillary advancement, or mandibular advancement was performed. Three groups of 10 subjects each were established: group 1, bimaxillary ...