Sport & Exercise Science Education report.The Future of Interdisciplinary Research Beyond REF 2021.Scotland at the Heart of Meeting Global Challenges.Physiology and Basic Research Funding in Ireland.A National Post-Pandemic Resilience Programme.Supporting the development of public health guidance for long COVID.Translating Knowledge and Research into Impact.Advice for attending your first meeting.Early Career Life Scientists’ Symposium.Michael J Rennie Oral Communication Prize. ![]() The Journal of Physiology Early Investigator Prize.Experimental Physiology Inaugural Review Prize.Experimental Physiology Mid-Career Researcher Prize.Experimental Physiology Early Career Author Prize.The Otto Hutter Physiology Teaching Prize.The Journal of Physiology’s Virtual Journal Club.Human, Environmental & Exercise Physiology.Anatomic dead space is age dependent and is > 3 ml/kg in early infancy.Regenerating the Cardiovascular System: Mending Broken Hearts and Beyond The following relationship between total anatomic dead space (DStotal in ml/kg) and age (in yr) is derived: DStotal = 3.28 - 0.56, with r = 0.95 and P = 0.0001. Mean intrathoracic anatomic dead space was 1.03 ml/kg and was not related to age. Extrathoracic dead space per kilogram decreased exponentially with increasing age, ranging from 2.3 ml/kg in early infancy to 0.8 ml/kg in children older than 6 yr. Intrathoracic dead space was measured by continuous analysis of end-tidal and mixed-expired PCO2 and minute ventilation in 10 patients, aged 18 days to 14.7 yr. Extrathoracic dead space was measured by a "water displacement" technique in 40 patients aged 7 days to 14.2 yr who were intubated with cuffed endotracheal tubes. Because of the relatively large head size of infants and children, we hypothesized that extrathoracic and, therefore, total dead space would be relatively larger in pediatric subjects. In adults, anatomic dead space is 2.2 ml/kg.
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