Respiration; international review of thoracic diseases
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Soluble triggering receptor expressed on myeloid cells 1 (sTREM-1) is an activating receptor on inflammatory cells upregulated by microbial products. Elevated levels of sTREM-1 have been associated with the diagnosis and prognosis of patients with sepsis, severe pneumonia and chronic obstructive pulmonary disease (COPD). ⋯ The present study shows an increase in sTREM-1 in patients with COPD compared to SM but not in AE-COPD compared to sCOPD. Viral exacerbations showed significantly lower sTREM-1 levels than non-viral exacerbations.
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Histopathological alterations and a reduced number of capillaries have been observed in the palate muscles of snorers with obstructive sleep apnea syndrome (OSAS). These changes may create a substrate for decreased microcirculation, impaired aerobic metabolism and muscle dysfunction and contribute to upper airway obstruction during sleep. ⋯ Abnormal mitochondrial distribution, a low capillary supply and signs of impaired oxidative activity suggest that muscle dysfunction of the palate muscles in long-term snorers may contribute to the upper airway obstruction during sleep. The cause of these abnormalities remains unclear, but local muscle and nerve trauma due to vibration and stretch is a possible etiology.
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With the availability of compact, portable, effective microspirometers, pulmonary function tests no longer need to be performed only in specialized laboratories. However, the perception persists that small flow-sensing devices are less accurate than volume-sensing spirometers. ⋯ The Spirobank device seems to be appropriate for research purposes if the standardized protocol is used correctly and the acceptability criteria are respected.
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Although endobronchial ultrasound (EBUS)-guided transbronchial biopsy (TBB) has been shown to increase the diagnostic yield over conventional bronchoscopic techniques, an important issue regarding the optimal number of biopsy specimens required has not been thoroughly investigated. ⋯ Probe position independently predicts the diagnostic yield of EBUS-guided TBB. In real-world practice, the optimal number of biopsy specimens should be decided on a case-by-case basis.
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Expiratory flow-volume (EFV) loops are continuously displayed on the screen of intensive care unit (ICU) ventilators. ⋯ The slope of the angle during the last 50% of expired volume in the COPD patients was associated with worsened respiratory mechanics and higher morbidity.