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Histopathology of the small airways: Similarities and differences between ageing and COPD.
Pulmonology
December 2025
Division of Immunology, Immunity to Infection and Respiratory Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester and Manchester University NHS Foundation Trust, Manchester, UK.
Age-related lung function decline is associated with small airway closure and gas trapping. The mechanisms which cause these changes are not fully understood. It has been suggested that COPD is caused by accelerated ageing.
View Article and Find Full Text PDFEuropean central hypoventilation syndrome consortium description of congenital central hypoventilation syndrome neonatal onset.
Eur J Pediatr
January 2025
Service de Physiologie Pédiatrique-Centre du Sommeil-CRMR Hypoventilations Alvéolaires Rares, INSERM NeuroDiderot, Université Paris-Cité, AP-HP, Hôpital Robert Debré, Paris, France.
Unlabelled: It is known that in most cases of congenital central hypoventilation syndrome (CCHS), apnoeas and hypoventilation occur at birth. Nevertheless, a detailed description of initial symptoms, including pregnancy events and diagnostic tests performed, is warranted in infants with neonatal onset of CCHS, that is, in the first month of life. The European Central Hypoventilation Syndrome Consortium created an online patient registry from which 97 infants (44 females) with CCHS of neonatal onset and PHOX2B mutation from 10 countries were selected.
View Article and Find Full Text PDFAccuracy of two-compartment modelling of gas exchange with ventilation-perfusion mismatch in inhalational anesthesia.
Anesthesiology
January 2025
Department of Critical Care, Melbourne Medicine School, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria, Australia.
Background: Multi-compartment computer models of heterogeneity in alveolar ventilation-perfusion ratios (VA/Q scatter) across the lung explain the significant alveolar-arterial (A-a) partial pressure gradients and associated alveolar dead-space fractions (VDA/VA) seen in anesthetized patients for both carbon dioxide and for anesthetic gases of different blood solubilities. However, the accuracy of a simpler two-compartment model of VA/Q scatter to do this has not been tested or compared to calculations from the traditional Riley model with "ideal", unventilated (shunt) and unperfused (deadspace) compartments.
Methods: Measurements of gas partial pressures in inspired and expired gas and arterial and mixed venous blood from 29 patients undergoing inhalational general anesthesia for cardiac surgery was used to compare the accuracy of two simple models of VA/Q scatter and lung gas exchange in predicting measured alveolar and arterial partial pressure differences, and associated alveolar dead-space calculations for the modern anesthetic gases isoflurane, sevoflurane and desflurane.
Novel index for the evaluation of wound healing following erupted tooth extraction.
Minerva Dent Oral Sci
January 2025
Department of Surgical, Medical, Molecular and Critical Area Pathology, University Hospital of Pisa, University of Pisa, Pisa, Italy.
Background: Understanding healing of the alveolar process is crucial for immediate implant, alveolar ridge preservation and guided bone regeneration procedures, and to evaluate it several different scales have been proposed; however, all have different characteristics and seem to miss a standardization allowing for an objective and dichotomous evaluation of the different aspects of wound healing. The objective of the present study is to propose and apply, in real clinical scenarios, a novel index for the objective evaluation of wound healing following erupted tooth extraction.
Methods: Healthy patients in need of a single tooth extraction were enrolled and re-examined at 7, 14 and 21 days after the extraction using the novel index proposed.
Dysregulation of lung epithelial cell homeostasis and immunity contributes to Middle East respiratory syndrome coronavirus disease severity.
mSphere
January 2025
Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
Coronaviruses (CoV) emerge suddenly from animal reservoirs to cause novel diseases in new hosts. Discovered in 2012, the Middle East respiratory syndrome coronavirus (MERS-CoV) is endemic in camels in the Middle East and is continually causing local outbreaks and epidemics. While all three newly emerging human CoVs from the past 20 years (SARS-CoV, SARS-CoV-2, and MERS-CoV) cause respiratory disease, each CoV has unique host interactions that drive differential pathogeneses.
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