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JONATHAN HARDMAN's Outputs (32)

Comparison of apnoeic oxygen techniques in term pregnant subjects: a computational modelling study (2022)
Journal Article
Ellis, R., Laviola, M., Stolady, D., Valentine, R. L., Pillai, A., & Hardman, J. G. (2022). Comparison of apnoeic oxygen techniques in term pregnant subjects: a computational modelling study. British Journal of Anaesthesia, 129(4), 581-587. https://doi.org/10.1016/j.bja.2022.06.021

Background: Hypoxaemia during general anaesthesia can cause harm. Apnoeic oxygenation extends safe apnoea time, reducing risk during airway management. We hypothesised that low-flow nasal oxygenation (LFNO) would extend safe apnoea time similarly to... Read More about Comparison of apnoeic oxygen techniques in term pregnant subjects: a computational modelling study.

Comparison of apnoeic oxygen techniques in term pregnant subjects: a computational modelling study (2022)
Journal Article
Ellis, R., Laviola, M., Stolady, D., Valentine, R. L., Pillai, A., & Hardman, J. G. (2022). Comparison of apnoeic oxygen techniques in term pregnant subjects: a computational modelling study. British Journal of Anaesthesia, 129(4), 581-587. https://doi.org/10.1016/j.bja.2022.06.021

Background
Hypoxaemia during general anaesthesia can cause harm. Apnoeic oxygenation extends safe apnoea time, reducing risk during airway management. We hypothesised that low-flow nasal oxygenation (LFNO) would extend safe apnoea time similarly to... Read More about Comparison of apnoeic oxygen techniques in term pregnant subjects: a computational modelling study.

Validation of at-the-bedside formulae for estimating ventilator driving pressure during airway pressure release ventilation using computer simulation (2022)
Journal Article
Mistry, S., Das, A., Saffaran, S., Yehya, N., Scott, T. E., Chikhani, M., …Bates, D. G. (2022). Validation of at-the-bedside formulae for estimating ventilator driving pressure during airway pressure release ventilation using computer simulation. Respiratory Research, 23, Article 101. https://doi.org/10.1186/s12931-022-01985-z

Background: Airway pressure release ventilation (APRV) is widely available on mechanical ventilators and has been proposed as an early intervention to prevent lung injury or as a rescue therapy in the management of refractory hypoxemia. Driving press... Read More about Validation of at-the-bedside formulae for estimating ventilator driving pressure during airway pressure release ventilation using computer simulation.

Optimising respiratory support for early COVID-19 pneumonia: a computational modelling study (2022)
Journal Article
Weaver, L., Das, A., Saffaran, S., Yehya, N., Chikhani, M., Scott, T. E., …Bates, D. G. (2022). Optimising respiratory support for early COVID-19 pneumonia: a computational modelling study. British Journal of Anaesthesia, https://doi.org/10.1016/j.bja.2022.02.037

Background: Optimal respiratory support in early COVID-19 pneumonia is controversial and remains unclear. Using computational modelling, we examined whether lung injury might be exacerbated in early COVID-19 by assessing the impact of conventional ox... Read More about Optimising respiratory support for early COVID-19 pneumonia: a computational modelling study.

Intra-tracheal multiplexed sensing of contact pressure and perfusion (2021)
Journal Article
Correia, R., Gadsby, B., Korposh, S., Norris, A. M., Hayes-Gill, B. R., Sinha, R., …Morgan, S. P. (2022). Intra-tracheal multiplexed sensing of contact pressure and perfusion. Biomedical Optics Express, 13(1), 48-64. https://doi.org/10.1364/BOE.442165

Incorrect endotracheal tube (ETT) cuff inflation pressure causes significant problems for intubated patients. The technical development and first in vivo use of a smart ETT for measurements at the cuff-trachea interface during mechanical ventilation... Read More about Intra-tracheal multiplexed sensing of contact pressure and perfusion.

Pre-hospital continuous positive airway pressure after blast lung injury and hypovolaemic shock: a modelling study (2021)
Journal Article
Mistry, S., Das, A., Hardman, J. G., Bates, D. G., & Scott, T. E. (2022). Pre-hospital continuous positive airway pressure after blast lung injury and hypovolaemic shock: a modelling study. British Journal of Anaesthesia, 128(2), e151-e157. https://doi.org/10.1016/j.bja.2021.10.012

Background
In non-traumatic respiratory failure, pre-hospital application of CPAP reduces the need for intubation. Primary blast lung injury (PBLI) accompanied by haemorrhagic shock is common after mass casualty incidents. We hypothesised that pre-h... Read More about Pre-hospital continuous positive airway pressure after blast lung injury and hypovolaemic shock: a modelling study.

High risk of patient self-inflicted lung injury in COVID-19 with frequently encountered spontaneous breathing patterns: a computational modelling study (2021)
Journal Article
Weaver, L., Das, A., Saffaran, S., Yehya, N., Scott, T. E., Chikhani, M., …Bates, D. G. (2021). High risk of patient self-inflicted lung injury in COVID-19 with frequently encountered spontaneous breathing patterns: a computational modelling study. Annals of Intensive Care, 11(1), Article 109. https://doi.org/10.1186/s13613-021-00904-7

Background: There is ongoing controversy regarding the potential for increased respiratory effort to generate patient self-inflicted lung injury (P-SILI) in spontaneously breathing patients with COVID-19 acute hypoxaemic respiratory failure. However,... Read More about High risk of patient self-inflicted lung injury in COVID-19 with frequently encountered spontaneous breathing patterns: a computational modelling study.

Ventilation strategies for front of neck airway rescue: an in silico study (2021)
Journal Article
Laviola, M., Niklas, C., Das, A., Bates, D. G., & Hardman, J. G. (2021). Ventilation strategies for front of neck airway rescue: an in silico study. British Journal of Anaesthesia, 126(6), 1226-1236. https://doi.org/10.1016/j.bja.2021.01.030

Background. During induction of general anaesthesia a “can’t intubate, can’t oxygenate” (CICO) situation can arise, leading to severe hypoxaemia. Evidence is scarce to guide ventilation strategies for small-bore front of neck airways that ensure effe... Read More about Ventilation strategies for front of neck airway rescue: an in silico study.

Effect of variable pre-oxygenation endpoints on safe apnoea time using high flow nasal oxygen for women in labour: a modelling investigation (2021)
Journal Article
Stolady, D., Laviola, M., Pillai, A., & Hardman, J. G. (2021). Effect of variable pre-oxygenation endpoints on safe apnoea time using high flow nasal oxygen for women in labour: a modelling investigation. British Journal of Anaesthesia, 126(4), 889-895. https://doi.org/10.1016/j.bja.2020.12.031

Background

Studies of pulmonary denitrogenation (pre-oxygenation) in obstetric populations have shown high flow nasal oxygen therapy (HFNO) is inferior to facemask techniques. HFNO achieves median end-tidal oxygen fraction (FE′O2) of 0.87 after 3... Read More about Effect of variable pre-oxygenation endpoints on safe apnoea time using high flow nasal oxygen for women in labour: a modelling investigation.

In Silico Modeling of Coronavirus Disease 2019 Acute Respiratory Distress Syndrome: Pathophysiologic Insights and Potential Management Implications (2020)
Journal Article
Das, A., Saffaran, S., Chikhani, M., Scott, T. E., Laviola, M., Yehya, N., …Bates, D. G. (2020). In Silico Modeling of Coronavirus Disease 2019 Acute Respiratory Distress Syndrome: Pathophysiologic Insights and Potential Management Implications. Critical Care Explorations, 2(9), Article e0202. https://doi.org/10.1097/CCE.0000000000000202

Objectives: Patients with COVID-19 Acute Respiratory Distress Syndrome (CARDS) appear to present with at least two distinct phenotypes: severe hypoxemia with relatively well-preserved lung compliance and lung gas volumes (Type 1) and a more conventio... Read More about In Silico Modeling of Coronavirus Disease 2019 Acute Respiratory Distress Syndrome: Pathophysiologic Insights and Potential Management Implications.

The impact of video games on ultrasound-guided regional anesthesia skills (2020)
Journal Article
Shafqat, A., Mukarram, S., Bedforth, N. M., Hardman, J. G., & Mccahon, R. A. (2020). The impact of video games on ultrasound-guided regional anesthesia skills. Regional Anesthesia and Pain Medicine, 45(11), 860-865. https://doi.org/10.1136/rapm-2020-101641

Background: There is an association between video game practice and laparoscopic expertise in trainee surgeons. Ultrasound-guided regional anesthesia has many parallels with laparoscopic surgery. The aim of this study was to explore whether video gam... Read More about The impact of video games on ultrasound-guided regional anesthesia skills.

Management of primary blast lung injury: a comparison of airway pressure release versus low tidal volume ventilation (2020)
Journal Article
Scott, T. E., Das, A., Haque, M., Bates, D. G., & Hardman, J. G. (2020). Management of primary blast lung injury: a comparison of airway pressure release versus low tidal volume ventilation. Intensive Care Medicine Experimental, 8(1), Article 26. https://doi.org/10.1186/s40635-020-00314-2

Background

Primary blast lung injury (PBLI) presents as a syndrome of respiratory distress and haemoptysis resulting from explosive shock wave exposure and is a frequent cause of mortality and morbidity in both military conflicts and terrorist att... Read More about Management of primary blast lung injury: a comparison of airway pressure release versus low tidal volume ventilation.

Effect of mental rotation skills training on ultrasound-guided regional anaesthesia task performance by novice operators: a rater-blinded, randomised, controlled study (2020)
Journal Article
Hewson, D. W., Knudsen, R., Shanmuganathan, S., Ferguson, E., Hardman, J. G., Bedforth, N. M., & McCahon, R. A. (2020). Effect of mental rotation skills training on ultrasound-guided regional anaesthesia task performance by novice operators: a rater-blinded, randomised, controlled study. British Journal of Anaesthesia, 125(2), 168-174. https://doi.org/10.1016/j.bja.2020.04.090

Background: The effect of mental rotation training on ultrasound guided regional anaesthesia (UGRA) skill acquisition is currently unknown. In this study we aimed to examine whether mental rotation skill training can improve UGRA task performance by... Read More about Effect of mental rotation skills training on ultrasound-guided regional anaesthesia task performance by novice operators: a rater-blinded, randomised, controlled study.

Effect of mental rotation skills training on ultrasound-guided regional anaesthesia task performance by novice operators: a rater-blinded, randomised, controlled study (2020)
Journal Article
Hewson, D. W., Knudsen, R., Shanmuganathan, S., Ferguson, E., Hardman, J. G., Bedforth, N. M., & McCahon, R. A. (2020). Effect of mental rotation skills training on ultrasound-guided regional anaesthesia task performance by novice operators: a rater-blinded, randomised, controlled study. British Journal of Anaesthesia, 125(2), 168-174. https://doi.org/10.1016/j.bja.2020.04.090

© 2020 British Journal of Anaesthesia Background: The effect of mental rotation training on ultrasound-guided regional anaesthesia (UGRA) skill acquisition is currently unknown. In this study we aimed to examine whether mental rotation skill training... Read More about Effect of mental rotation skills training on ultrasound-guided regional anaesthesia task performance by novice operators: a rater-blinded, randomised, controlled study.

Utility of Driving Pressure and Mechanical Power to Guide Protective Ventilator Settings in Two Cohorts of Adult and Pediatric Patients With Acute Respiratory Distress Syndrome: A Computational Investigation (2020)
Journal Article
Yehya, N., Saffaran, S., Das, A., Hardman, J. G., Laffey, J. G., & Bates, D. G. (2020). Utility of Driving Pressure and Mechanical Power to Guide Protective Ventilator Settings in Two Cohorts of Adult and Pediatric Patients With Acute Respiratory Distress Syndrome: A Computational Investigation. Critical Care Medicine, 48(7), 1001-1008. https://doi.org/10.1097/CCM.0000000000004372

Objectives:
Mechanical power and driving pressure have been proposed as indicators, and possibly drivers, of ventilator-induced lung injury. We tested the utility of these different measures as targets to derive maximally protective ventilator sett... Read More about Utility of Driving Pressure and Mechanical Power to Guide Protective Ventilator Settings in Two Cohorts of Adult and Pediatric Patients With Acute Respiratory Distress Syndrome: A Computational Investigation.

Effect of oxygen fraction on airway rescue: a computational modelling study (2020)
Journal Article
Laviola, M., Niklas, C., Das, A., Bates, D. G., & Hardman, J. G. (2020). Effect of oxygen fraction on airway rescue: a computational modelling study. British Journal of Anaesthesia, 125(1), e69-e74. https://doi.org/10.1016/j.bja.2020.01.004

© 2020 British Journal of Anaesthesia Background: During induction of general anaesthesia, patients frequently experience apnoea, which can lead to dangerous hypoxaemia. An obstructed upper airway can impede attempts to provide ventilation. Although... Read More about Effect of oxygen fraction on airway rescue: a computational modelling study.

Mathematical and Computational Modelling in Critical Illness (2019)
Journal Article
Laviola, M., Bates, D. G., & Hardman, J. G. (2019). Mathematical and Computational Modelling in Critical Illness. European Respiratory & Pulmonary Diseases, 5(1),

Mathematical and computational modelling are assuming a prominent role in investigating the complex pathophysiological states and therapeutic strategies in critical illness. This editorial briefly illustrates the models of the respiratory and cardiov... Read More about Mathematical and Computational Modelling in Critical Illness.

Anaesthetist-controlled versus patient-maintained effect-site targeted propofol sedation during elective primary lower-limb arthroplasty performed under spinal anaesthesia (ACCEPTS): study protocol for a parallel-group randomised comparison trial (2019)
Journal Article
Hewson, D. W., Worcester, F., Sprinks, J., Smith, M. D., Buchanan, H., Breedon, P., …Bedforth, N. M. (2019). Anaesthetist-controlled versus patient-maintained effect-site targeted propofol sedation during elective primary lower-limb arthroplasty performed under spinal anaesthesia (ACCEPTS): study protocol for a parallel-group randomised comparison trial. Trials, 20(1), Article 129. https://doi.org/10.1186/s13063-019-3228-4

Background
The clinical efficacy of effect-site targeted patient-maintained propofol sedation (PMPS) compared to anaesthetist-controlled propofol sedation (ACPS) for patients undergoing awake joint replacement surgery is currently unknown. There is... Read More about Anaesthetist-controlled versus patient-maintained effect-site targeted propofol sedation during elective primary lower-limb arthroplasty performed under spinal anaesthesia (ACCEPTS): study protocol for a parallel-group randomised comparison trial.

Computer simulation clarifies mechanisms of carbon dioxide clearance during apnoea (2018)
Journal Article
Laviola, M., Das, A., Chikhani, M., Bates, D., & Hardman, J. (2019). Computer simulation clarifies mechanisms of carbon dioxide clearance during apnoea. British Journal of Anaesthesia, 122(3), 395-401. https://doi.org/10.1016/j.bja.2018.11.012

Background

Apnoeic oxygenation can come close to matching the oxygen demands of the apnoeic patient but does not facilitate carbon dioxide (CO2) elimination, potentially resulting in dangerous hypercapnia. Numerous studies have shown that high-flo... Read More about Computer simulation clarifies mechanisms of carbon dioxide clearance during apnoea.