Capillary recruitment in a theoretical model for blood flow regulation in heterogeneous microvessel networks

BC Fry, TK Roy, TW Secomb - Physiological reports, 2013 - Wiley Online Library
In striated muscle, the number of capillaries containing moving red blood cells increases
with increasing metabolic demand. This phenomenon, termed capillary recruitment, has long …

Influence of high affinity haemoglobin on the response to normoxic and hypoxic exercise

…, JRA Shepherd, SK Roberts, TK Roy… - The Journal of …, 2020 - Wiley Online Library
Key points Theoretical models suggest there is no benefit of high affinity haemoglobin to
preserve maximal oxygen uptake in acute hypoxia but the comparative biology literature has …

The oxygen cascade during exercise in health and disease

PB Dominelli, CC Wiggins, TK Roy, TW Secomb… - Mayo Clinic …, 2021 - Elsevier
The oxygen transport cascade describes the physiological steps that bring atmospheric oxygen
into the body where it is delivered and consumed by metabolically active tissue. As such, …

Modelling the relationships between haemoglobin oxygen affinity and the oxygen cascade in humans

JRA Shepherd, PB Dominelli, TK Roy… - The Journal of …, 2019 - Wiley Online Library
Key points Haemoglobin affinity is an integral concept in exercise physiology that impacts
oxygen uptake, delivery and consumption. How chronic alterations in haemoglobin affinity …

Effects of impaired microvascular flow regulation on metabolism‐perfusion matching and organ function

TK Roy, TW Secomb - Microcirculation, 2021 - Wiley Online Library
Impaired tissue oxygen delivery is a major cause of organ damage and failure in critically ill
patients, which can occur even when systemic parameters, including cardiac output and …

[HTML][HTML] A prospective trial of elective extubation in brain injured patients meeting extubation criteria for ventilatory support: a feasibility study

…, MT Keegan, DR Brown, FX Whalen, TK Roy… - Critical Care, 2008 - Springer
Introduction To assess the safety and feasibility of recruiting mechanically ventilated patients
with brain injury who are solely intubated for airway protection and randomising them into …

BiPAP in early Guillain-Barré syndrome may fail

EFM Wijdicks, TK Roy - Canadian journal of neurological sciences, 2006 - cambridge.org
Background:Non-invasive mechanical ventilation (BiPAP) has been introduced for use in
neuromuscular respiratory disease such as amyotrophic lateral sclerosis and myasthenia …

Functional implications of microvascular heterogeneity for oxygen uptake and utilization

TK Roy, TW Secomb - Physiological Reports, 2022 - Wiley Online Library
In the vascular system, an extensive network structure provides convective and diffusive
transport of oxygen to tissue. In the microcirculation, parameters describing network structure, …

Theoretical comparison of wall-derived and erythrocyte-derived mechanisms for metabolic flow regulation in heterogeneous microvascular networks

TK Roy, AR Pries, TW Secomb - American Journal of …, 2012 - journals.physiology.org
The objective of this study is to compare the effectiveness of metabolic signals derived from
erythrocytes and derived from the vessel wall for regulating blood flow in heterogeneous …

Theoretical analysis of the determinants of lung oxygen diffusing capacity

TK Roy, TW Secomb - Journal of theoretical biology, 2014 - Elsevier
The process of pulmonary oxygen uptake is analyzed to obtain an explicit equation for lung
oxygen diffusing capacity in terms of hematocrit and pulmonary capillary diameter. An …