Respiration; international review of thoracic diseases
-
Propofol is a fast-acting intravenous sedative that has advantages as a procedural sedative over traditional regimens. It has been shown to have a similar safety profile to traditional sedating medications in the setting of gastroenterologic endoscopy. Nurse-administered propofol sedation is given by a specially-trained nurse, without anesthesiologist involvement. ⋯ Nurse-administered propofol sedation is a feasible and safe sedation method for bronchoscopic procedures.
-
There is more than one mechanism which contributes to the increases in upper airway resistance in obstructive sleep apnea and hypopnea syndrome. Impulse oscillation provides a convenient way of noninvasive monitoring and differentiating the contributions of airway resistance. ⋯ The magnitude of change in airway resistance due to posture is bigger in OSAHS than in non-OSAHS. Zrs, R5 and R20 in supine position were associated moderately with apnea/hypopnea index.
-
Electrical impedance tomography (EIT) is able to detect variations in regional lung electrical impedance associated with changes in both air and blood content and potentially capable of assessing regional ventilation-perfusion relationships. However, regional lung perfusion is difficult to determine because the impedance changes synchronous with the heart rate are of very small amplitude. ⋯ Our results indicate that redistribution of regional lung perfusion can be assessed by EIT during one-lung ventilation. The performance of EIT in detecting changes in lung perfusion in even smaller lung regions remains to be established.