Anaes SAQs · Applied cardiovascular & respiratory physiology
Lung volumes, capacities and dead space
Primary — TV/IRV/ERV/RV; IC/FRC/VC/TLC; FRC as oxygen reservoir and least-work volume; closing capacity rises with age and exceeds FRC causing atelectasis; anaesthesia cuts FRC 10-20 percent; anatomical/alveolar/physiological dead space and the Bohr equation; spirometry limits and helium/plethysmography.
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ANZCAFRCAABAEDAIC
Prompt
Define the lung volumes and capacities. Explain the importance of the functional residual capacity, the closing capacity relationship, and the dead space.
Question
Define the lung volumes and capacities. Explain the importance of the functional residual capacity, the closing capacity relationship, and the dead space.
References4ShowHide
- [1]Harris BR. Patient positioning and the compromised respiratory system. Respir Care, 2026.PMID 42300995
- [2]Bouvet L, et al. Effect of high-flow nasal preoxygenation on anesthetic preparation time for general anesthesia in emergency caesarean delivery: a prospective randomized cross-over simulation study. Minerva Anestesiol, 2026.PMID 42206896
- [3]CACP Task Force. [Expert consensus on optimizing the multidisciplinary clinical pathways and management models for pulmonary function testing]. Chin J Tuberc Respir Dis, 2026.PMID 41912385
- [6]Chidini G, et al. Effects of Noninvasive Respiratory Support on Ventilation Distribution During Spontaneous Breathing Sedation in Preschool/School-Aged Children: An Electrical Impedance Tomography Study. Paediatr Anaesth, 2025.PMID 40119601