Dr Nchafatso Obonyo
Postdoctoral Research Fellow
Institute for Molecular Bioscience
Researcher biography
Dr Nchafatso G. Obonyo (BSc Hons, MB.ChB, DTM&H, MD/PhD, FCRcert)
Post-doctoral Research Fellow at the Critical Care Research Group-The Prince Charles Hospital, Institute of Molecular Bioscience-The University of Queensland. Main research focus is cardiac critical care and sepsis research.
Visiting Fellow in the Academic Division, Medical Engineering Research Facility, Queenlsand University of Technology. Fellow of the Initiative to Develop African Research Leaders (IDeAL) at the KEMRI-Wellcome Trust Research Programme, Kenya; Global Health Fellow, Wellcome Trust Centre for Global Health Research at Imperial College London,UK.
Recipient of the 2023 Africa Top-40 Under-40 Science Award and the 2023 African Professional in Australia of the Year Award.
Publications
Book
Obonyo, Nchafatso G. and Patel, Nilesh B. (2011). Effects of Khat (Catha Edulis Forsk) on spatial learning and memory. Germany: LAP Lambert Academic Publishing.
Book Chapters
Kariuki, Nyambura, Kimani, Esther, Jowi, Christine, Wamalwa, Dalton, Suen, Jacky Y., Fraser, John F. and Obonyo, Nchafatso G. (2025). Role of cTnT Versus Echocardiography in Diagnosing the Early Myocardial Injury in Children on Doxorubicin for Cancer Chemotherapy: A Cross-sectional Study in a Tertiary Referral Centre in Kenya. Medical Science: Trends and Innovations Vol. 6. (pp. 155-173) BP International. doi: 10.9734/bpi/msti/v6/2838
Shekar, Kiran, Obonyo, Nchafatso and Fraser, John F. (2018). Optimizing the patient and timing of the introduction of mechanical circulatory and extracorporeal respiratory support. Mechanical circulatory and respiratory support. (pp. 441-468) edited by Shaun D. Gregory, Michael C. Stevens and John F. Fraser. London, United Kingdom: Academic Press. doi: 10.1016/B978-0-12-810491-0.00014-X
Journal Articles
Milani, A., Fior, G., Liu, K., Semenzin, C., Wildi, K., Bösch, J., Obonyo, N.G., Prabhakar, V., Huynh, S., Arakkakunnel, T., Nonaka, H., Smalcova, J., Suen, J., Fraser, J.F. and Li Bassi, G. (2025). Heartbeat Interference on Ventilator Pressure-time Waveform as a Novel Pulmonary Parameter: Correlation With Pulmonary Mechanics. American Journal of Respiratory and Critical Care Medicine, 211 (Abstracts), A1508-A1508. doi: 10.1164/ajrccm.2025.211.abstracts.a1508
Milani, A., Fior, G., Liu, K., Wildi, K., Semenzin, C., Bösch, J., Obonyo, N.G., Passmore, M., Hyslop, K., Portatadino, S., Abbate, G., Panduru, R., Bouquet, M., Parker, S., Nonaka, H., Smalcova, J., Suen, J., Fraser, J.F. and Li Bassi, G. (2025). Heartbeat Interference on Ventilator Pressure-time Waveform to Predict Recruitability and Overdistention. American Journal of Respiratory and Critical Care Medicine, 211 (Abstracts), A1509-A1509. doi: 10.1164/ajrccm.2025.211.abstracts.a1509
Obonyo, Nchafatso G., Sela, Declan P., White, Nicole, Tunbridge, Matthew, Sim, Beatrice, Rachakonda, Reema H., See Hoe, Louise E., Li Bassi, Gianluigi, Fanning, Jonathon P., Tung, John‐Paul, Suen, Jacky Y. and Fraser, John F. (2025). Effects of transfusing older red blood cells on patient outcomes in critical illness: A retrospective cohort study. Vox Sanguinis. doi: 10.1111/vox.70007
Kariuki, Nyambura, Kimani, Esther, Jowi, Christine, Wamalwa, Dalton, Suen, Jacky Y., Fraser, John F. and Obonyo, Nchafatso G. (2024). Early myocardial injury in children on doxorubicin for cancer chemotherapy: a cross-sectional study in a tertiary referral centre in Kenya. BMC Cardiovascular Disorders, 24 (1) 260, 1-9. doi: 10.1186/s12872-024-03922-y
Karnik, Varun, Colombo, Sebastiano Maria, Rickards, Leah, Heinsar, Silver, See Hoe, Louise E., Wildi, Karin, Passmore, Margaret R., Bouquet, Mahe, Sato, Kei, Ainola, Carmen, Bartnikowski, Nicole, Wilson, Emily S., Hyslop, Kieran, Skeggs, Kris, Obonyo, Nchafatso G., McDonald, Charles, Livingstone, Samantha, Abbate, Gabriella, Haymet, Andrew, Jung, Jae-Seung, Sato, Noriko, James, Lynnette, Lloyd, Benjamin, White, Nicole, Palmieri, Chiara, Buckland, Mark, Suen, Jacky Y., McGiffin, David C., Fraser, John F. and Li Bassi, Gianluigi (2024). Open-lung ventilation versus no ventilation during cardiopulmonary bypass in an innovative animal model of heart transplantation. Intensive Care Medicine Experimental, 12 (1) 109. doi: 10.1186/s40635-024-00669-w
Obonyo, Nchafatso G., Raman, Sainath, Suen, Jacky Y., Peters, Kate M., Phan, Minh-Duy, Passmore, Margaret R., Bouquet, Mahe, Wilson, Emily S., Hyslop, Kieran, Palmieri, Chiara, White, Nicole, Sato, Kei, Farah, Samia M., Gandini, Lucia, Liu, Keibun, Fior, Gabriele, Heinsar, Silver, Ijuin, Shinichi, Kyun Ro, Sun, Abbate, Gabriella, Ainola, Carmen, Sato, Noriko, Lundon, Brooke, Portatadino, Sofia, Rachakonda, Reema H., Schneider, Bailey, Harley, Amanda, See Hoe, Louise E., Schembri, Mark A. ... Fraser, John F. (2024). An ovine septic shock model of live bacterial infusion. Intensive Care Medicine Experimental, 12 (1) 94, 1-20. doi: 10.1186/s40635-024-00684-x
Sato, Kei, See Hoe, Louise, Chan, Jonathan, Obonyo, Nchafatso G., Wildi, Karin, Heinsar, Silver, Colombo, Sebastiano M., Ainola, Carmen, Abbate, Gabriella, Sato, Noriko, Passmore, Margaret R., Bouquet, Mahe, Wilson, Emily S., Hyslop, Kieran, Livingstone, Samantha, Haymet, Andrew, Jung, Jae‐Seung, Skeggs, Kris, Palmieri, Chiara, White, Nicole, Platts, David, Suen, Jacky Y., McGiffin, David C., Li Bassi, Gianluigi and Fraser, John F. (2024). Echocardiographic surrogate of left ventricular stroke work in a model of brain stem death donors. European Journal of Clinical Investigation, 54 (10) e14259, 1-11. doi: 10.1111/eci.14259
Sato, Kei, Heinsar, Silver, Chan, Jonathan, Farah, Samia M., Wildi, Karin, Obonyo, Nchafatso G., Liu, Keibun, Ainola, Carmen, Sato, Noriko, Abbate, Gabriella, Wilson, Emily S., Bouquet, Mahé, Hyslop, Kieran, Passmore, Margaret R., Ijuin, Shinichi, Ro, Sun Kyun, Fior, Gabriele, Gandini, Lucia, Lundon, Brooke, Platts, David G., Suen, Jacky Y., Li Bassi, Gianluigi and Fraser, John F. (2024). A novel echocardiographic parameter considering left ventricular afterload during V‐A ECMO support. European Journal of Clinical Investigation, 54 (10) e14263, 1-11. doi: 10.1111/eci.14263
Feng, Shi Nan, Kelly, Thu-Lan, Fraser, John F., Li Bassi, Gianluigi, Suen, Jacky, Zaaqoq, Akram, Griffee, Matthew J., Arora, Rakesh C., White, Nicole, Whitman, Glenn, Robba, Chiara, Battaglini, Denise, Cho, Sung-Min, on behalf of COVID-19 Critical Care Consortium (CCCC) and Obonyo, Gikenyi N. (2024). Impact of hemoglobin levels on composite cardiac arrest or stroke outcome in patients with respiratory failure due to COVID-19. Critical Care Explorations, 6 (9) e1143, 1-12. doi: 10.1097/CCE.0000000000001143
Maitland, Kathryn, Hamaluba, Mainga, Obonyo, Nchafatso, Oguda, Emmanuel, Mogoka, Christabel, Williams, Thomas N., Chaponda, Mike, Miti, Sam, Kamavu, Luc Kambale, Jonathan Gwasupika, Jonathan, Connon, Roisin, Gibb, Diana M., Dondorp, Arjen, Day, Nick, White, Nick, Walker, A. Sarah, George, Elizabeth C. and Severe Malaria in African Children A Research and Trials (SMAART) consortium (2024). SEVUparin as a potential adjunctive treatment in children with severe malaria: a phase I trial safety and dose finding trial (SEVUSMAART). Wellcome Open Research, 8 484, 484. doi: 10.12688/wellcomeopenres.20111.2
Obonyo, Nchafatso. G., Dhanapathy, Vikash, White, Nicole, Sela, Declan P., Rachakonda, Reema H., Tunbridge, Matthew, Sim, Beatrice, Teo, Derek, Nadeem, Zohaib, See Hoe, Louise E., Bassi, Gianluigi Li, Fanning, Jonathon P., Tung, John-Paul, Suen, Jacky Y. and Fraser, John F. (2024). Effects of red blood cell transfusion on patients undergoing cardiac surgery in Queensland – a retrospective cohort study. Journal of Cardiothoracic Surgery, 19 (1) 475, 1-9. doi: 10.1186/s13019-024-02974-7
Nonaka, Hideaki, Rätsep, Indrek, Obonyo, Nchafatso G., Suen, Jacky Y., Fraser, John F. and Chan, Jonathan (2024). Current trends and latest developments in echocardiographic assessment of right ventricular function: load dependency perspective. Frontiers in Cardiovascular Medicine, 11 1365798, 1-15. doi: 10.3389/fcvm.2024.1365798
Alagbonsi, Abdullateef Isiaka, Essop, Faadiel, Njelekela, Marina, Leminie, Abebaye Aragaw, Ojiambo, Robert, Malindisa, Evangelista Kenan, Alkizim, Faraj Omar, Ninsiima, Herbert Izo, Kediso, Teketel Eristu, Mashili, Fredirick L., Chillo, Omary, Ebrahim, Ashabilan A., Dionis, Ikunda, Ruhighira, Jacktan Josephat and Obonyo, Nchafatso Gikenyi (2024). Joint EASPS-AAPS Conference in Tanzania 2023: a beginning of the pragmatic efforts to promote physiology education, research and practice in East Africa. Advances in Physiology Education, 48 (3), 573-577. doi: 10.1152/advan.00091.2024
Maitland, Kathryn, Obonyo, Nchafasto, Hamaluba, Mainga, Ogoda, Emmanuel, Mogaka, Christabel, Williams, Thomas N., Newton, Charles, Kariuki, Symon M., Gibb, Diana M., Walker, A. Sarah, Connon, Roisin and George, Elizabeth C. (2024). A Phase I trial of Non-invasive Ventilation and seizure prophylaxis with levetiracetam In Children with Cerebral Malaria Trial (NOVICE-M Trial). Wellcome Open Research, 9 281, 281. doi: 10.12688/wellcomeopenres.21403.1
Abbate, Gabriella, Colombo, Sebastiano Maria, Semenzin, Clayton, Sato, Noriko, Liu, Keibun, Ainola, Carmen, Milani, Angelo, Fior, Gabriele, Obonyo, Nchafatso, White, Nicole, Chiumello, Davide, Pauls, Jo, Suen, Jacky Y., Fraser, John F. and Li Bassi, Gianluigi (2024). Comparative analysis of novel esophageal pressure monitoring catheters versus commercially available alternatives in a biomechanical model of the thoracic cavity. Scientific Reports, 14 (1) 9771, 1-12. doi: 10.1038/s41598-024-59790-1
Kirengo, Thomas O., Dossajee, Hussein, Onyango, Evans M., Rachakonda, Reema H., Schneider, Bailey, Sela, Declan P., Hosseinzadeh, Zahra, Nadeem, Zohaib and Obonyo, Nchafatso G. (2024). Catalysing global surgery: a meta-research study on factors affecting surgical research collaborations with Africa. Systematic Reviews, 13 (1) 89, 1-17. doi: 10.1186/s13643-024-02474-8
Heinsar, Silver, Sato, Kei, Obonyo, Nchafatso, Farah, Samia M, Bouquet, Mahe, Passmore, Margaret R, Liu, Keibun, Ijunin, Shinichi, Ainola, Carmen, Li Bassi, Gianluigi, Suen, Jacky Y and Fraser, John F. (2024). Improved microcirculation with pulsatile veno-arterial ECMO: an ovine model of cardiogenic shock. American Journal of Respiratory and Critical Care Medicine, 209 (11), 1396-1399. doi: 10.1164/rccm.202402-0419le
Sato, Kei, Wildi, Karin, Chan, Jonathan, Palmieri, Chiara, Obonyo, Nchafatso G., Heinsar, Silver, Liu, Keibun, Livingstone, Samantha, Sato, Noriko, Ainola, Carmen, Abbate, Gabriella, Bouquet, Mahé, Wilson, Emily, Passmore, Margaret, Hyslop, Kieran, Platts, David G., Suen, Jacky, Bassi, Gianluigi Li and Fraser, John F. (2024). A novel speckle‐tracking echocardiography parameter assessing left ventricular afterload. European Journal of Clinical Investigation, 54 (2) e14106, 1-12. doi: 10.1111/eci.14106
Olupot-Olupot, Peter, Aloroker, Florence, Mpoya, Ayub, Mnjalla, Hellen, Paasi, George, Nakuya, Margaret, Houston, Kirsty, Obonyo, Nchafatso, Hamaluba, Mainga, Evans, Jennifer A, Dewez, Manuel, Atti, Salifou, Guindo, Ousmane, Ouattara, San Maurice, Chara, Abdullahi, Sainna, Hadiza Alhaji, Amos, Omokore Oluseyi, Ogundipe, Oluwakemi, Sunyoto, Temmy, Coldiron, Matthew, LANGENDORF, Celine, SCHERRER, Marie-Francoise, PETRUCCI, Roberta, Connon, Roisin, George, Elizabeth C., Gibb, Diana M. and Maitland, Kathryn (2024). Gastroenteritis Rehydration Of children with Severe Acute Malnutrition (GASTROSAM): A Phase II Randomised Controlled trial: Trial Protocol. Wellcome Open Research, 6 160, 1-18. doi: 10.12688/wellcomeopenres.16885.2
Obonyo, Nchafatso G., Sela, Declan P., Raman, Sainath, Rachakonda, Reema, Schneider, Bailey, Hoe, Louise E. See, Fanning, Jonathon P., Bassi, Gianluigi Li, Maitland, Kathryn, Suen, Jacky Y. and Fraser, John F. (2023). Resuscitation-associated endotheliopathy (RAsE): a conceptual framework based on a systematic review and meta-analysis. Systematic Reviews, 12 (1) 221, 1-17. doi: 10.1186/s13643-023-02385-0
Obonyo, Nchafatso G. and Etyang, Anthony O. (2023). Cardiovascular Health Priorities in Sub-Saharan Africa. SN Comprehensive Clinical Medicine, 5 (1) 262, 1-7. doi: 10.1007/s42399-023-01605-x
Malfertheiner, Maximilian V., Ashlen, Garrett, Margaret, Passmore, Haymet, Andrew B., Richard, Webb I., von Bahr, Viktor, Millar, Jonathan E., Schneider, Bailey A., Obonyo, Nchafatso G., Debra, Black, Mahe, Bouquet, Nicole, Bartnikowski, Suen, Jacky Y. and Fraser, John F. (2023). The effects of nitric oxide on coagulation and inflammation in ex‐vivo models of extracorporeal membrane oxygenation and cardiopulmonary bypass. Artificial Organs, 47 (10), 1581-1591. doi: 10.1111/aor.14608
Maitland, Kathryn, Hamaluba, Mainga, Obonyo, Nchafatso, Oguda, Emmanuel, Mogoka, Christabel, Williams, Thomas N., Chaponda, Mike, Miti, Sam, Kamavu, Luc Kambale, Connon, Roisin, Gibb, Diana M., Dondorp, Arjen, Day, Nick, White, Nick, Walker, A. Sarah, George, Elizabeth C. and Severe Malaria in African Children A Research and Trials (SMAART) consortium (2023). SEVUparin as a potential Adjunctive Treatment in children with severe malaria: A phase I trial safety and dose finding trial (SEVUSMAART). Wellcome Open Research, 8, 484. doi: 10.12688/wellcomeopenres.20111.1
See Hoe, Louise E., Bassi, Gianluigi Li, Wildi, Karin, Passmore, Margaret R., Bouquet, Mahe, Sato, Kei, Heinsar, Silver, Ainola, Carmen, Bartnikowski, Nicole, Wilson, Emily S., Hyslop, Kieran, Skeggs, Kris, Obonyo, Nchafatso G., Shuker, Tristan, Bradbury, Lucy, Palmieri, Chiara, Pedersen, Sanne-Engkilde, McDonald, Charles, Colombo, Sebastiano M., Wells, Matthew A., Reid, Janice D., O'Neill, Hollier, Livingstone, Samantha, Abbate, Gabriella, Haymet, Andrew, Jung, Jae-Seung, Sato, Noriko, James, Lynnette, He, Ting ... Fraser, John F. (2023). Donor heart ischemic time can be extended to 8 hours using hypothermic machine perfusion in sheep. The Journal of Heart and Lung Transplantation, 42 (8), 1015-1029. doi: 10.1016/j.healun.2023.03.020
Obonyo, Nchafatso G., Lu, Lawrence Y., White, Nicole M., Sela, Declan P., Rachakonda, Reema H., Teo, Derek, Tunbridge, Matthew, Sim, Beatrice, See Hoe, Louise E., Fanning, Jonathon P., Tung, John‐Paul, McKnoulty, Matthew, Bassi, Gianluigi Li, Suen, Jacky Y. and Fraser, John F. (2023). Effects of transfusing older red blood cells and platelets on obstetric patient outcomes: a retrospective cohort study. International Journal of Gynecology and Obstetrics, 164 (1), 184-191. doi: 10.1002/ijgo.14997
Ro, Sun Kyun, Sato, Kei, Ijuin, Shinichi, Sela, Declan, Fior, Gabriele, Heinsar, Silver, Kim, Ji Young, Chan, Jonathan, Nonaka, Hideaki, Lin, Aaron C. W., Bassi, Gianluigi Li, Platts, David G., Obonyo, Nchafatso G., Suen, Jacky Y. and Fraser, John F. (2023). Assessment and diagnosis of right ventricular failure—retrospection and future directions. Frontiers in Cardiovascular Medicine, 10 1030864, 1-17. doi: 10.3389/fcvm.2023.1030864
Gandini, Lucia, Fior, Gabriele, Schibler, Andreas, Obonyo, Nchafatso G., Li Bassi, Gianluigi, Suen, Jacky Y. and Fraser, John F. (2023). Interleukin-6 inhibitors in non-COVID-19 ARDS: analyzing the past to step into the post-COVID-19 era. Critical Care, 27 (1) 124, 124. doi: 10.1186/s13054-023-04394-w
Sato, Kei, Heinsar, Silver, Wildi, Karin Susanne, Obonyo, Nchafatso, LIU, KEIBUN, Farah, Samia, Ainola, Carmen, Sato, Noriko, Fior, Gabriele, Ro, Sun Kyun, Gandini, Lucia, Ijuin, Shinichi, Bouquet, Mahe, Wilson, Emily, Passmore, Margaret, Hyslop, Kieran, Chan, Jonathan H., Platts, David, Suen, Jacky, Bassi, Gianluigi Li and Fraser, John (2023). A novel speckle-tracking echocardiographic parameter considering left ventricular loading condition in cardiogenic shock during VA ECMO. Journal of the American College of Cardiology, 81 (8) 1396, 1-1. doi: 10.1016/s0735-1097(23)01840-5
Fanning, Jonathon P., Weaver, Natasha, Fanning, Robert B., Griffee, Matthew J., Cho, Sung-Min, Panigada, Mauro, Obonyo, Nchafatso G., Zaaqoq, Akram M., Rando, Hannah, Chia, Yew Woon, Fan, Bingwen Eugene, Sela, Declan, Chiumello, Davide, Coppola, Silvia, Labib, Ahmed, Whitman, Glenn J. R., Arora, Rakesh C., Kim, Bo S., Motos, Anna, Torres, Antoni, Barbé, Ferran, Grasselli, Giacomo, Zanella, Alberto, Etchill, Eric, Usman, Asad Ali, Feth, Maximilian, White, Nicole M., Suen, Jacky Y., Li Bassi, Gianluigi ... on behalf of the COVID-19 Critical Care Consortium (2023). Hemorrhage, disseminated intravascular coagulopathy, and thrombosis complications among critically ill patients with COVID-19: an international COVID-19 critical care consortium study. Critical Care Medicine, 51 (5), 619-631. doi: 10.1097/ccm.0000000000005798
Obonyo, Nchafatso G., Sela, Declan P., Raman, Sainath, Rachakonda, Reema, Schneider, Bailey, Hoe, Louise E. See, Fanning, Jonathon P., Bassi, Gianluigi Li, Maitland, Kathryn, Suen, Jacky Y. and Fraser, John F. (2023). Resuscitation Associated Endotheliopathy (PubMed). searchRxiv, 2023. doi: 10.1079/searchrxiv.2023.00206
Obonyo, Nchafatso G., Olupot-Olupot, Peter, Mpoya, Ayub, Nteziyaremye, Julius, Chebet, Martin, Uyoga, Sophie, Muhindo, Rita, Fanning, Jonathon P., Shiino, Kenji, Chan, Jonathan, Fraser, John F. and Maitland, Kathryn (2022). A clinical and physiological prospective observational study on the management of pediatric shock in the post-fluid expansion as supportive therapy trial era. Pediatric Critical Care Medicine, 23 (7), 502-513. doi: 10.1097/pcc.0000000000002968
Li Bassi, Gianluigi, Gibbons, Kristen, Suen, Jacky Y., Dalton, Heidi J., White, Nicole, Corley, Amanda, Shrapnel, Sally, Hinton, Samuel, Forsyth, Simon, Laffey, John G., Fan, Eddy, Fanning, Jonathon P., Panigada, Mauro, Bartlett, Robert, Brodie, Daniel, Burrell, Aidan, Chiumello, Davide, Elhazmi, Alyaa, Esperatti, Mariano, Grasselli, Giacomo, Hodgson, Carol, Ichiba, Shingo, Luna, Carlos, Marwali, Eva, Merson, Laura, Murthy, Srinivas, Nichol, Alistair, Ogino, Mark, Pelosi, Paolo ... The COVID-19 Critical Care Consortium (2022). Early short course of neuromuscular blocking agents in patients with COVID-19 ARDS: a propensity score analysis. Critical Care, 26 (1) 141, 141. doi: 10.1186/s13054-022-03983-5
Urner, Martin, Barnett, Adrian G., Bassi, Gianluigi Li, Brodie, Daniel, Dalton, Heidi J., Ferguson, Niall D., Heinsar, Silver, Hodgson, Carol L., Peek, Giles, Shekar, Kiran, Suen, Jacky Y., Fraser, John F., Fan, Eddy, COVID-19 Critical Care Consortium Investigators and Obonyo, Nchafatso (2022). Venovenous extracorporeal membrane oxygenation in patients with acute covid-19 associated respiratory failure: comparative effectiveness study. BMJ, 377 e068723, e068723. doi: 10.1136/bmj-2021-068723
Sato, Kei, Chan, Jonathan, Appadurai, Vinesh, Obonyo, Nchafatso, See Hoe, Louise, Suen, Jacky Y. and Fraser, John F. (2022). Exploration of the utility of speckle-tracking echocardiography during mechanical ventilation and mechanical circulatory support. Critical Care Explorations, 4 (4) e0666, 1-10. doi: 10.1097/CCE.0000000000000666
Sato, Kei, White, Nicole, Fanning, Jonathon P., Obonyo, Nchafatso, Yamashita, Michael H., Appadurai, Vinesh, Ciullo, Anna, May, Meryta, Worku, Elliott T., Helms, Leticia, Ohshimo, Shinichiro, Juzar, Dafsah A., Suen, Jacky Y., Bassi, Gianluigi Li, Fraser, John F., Arora, Rakesh C. and on behalf of COVID-19 Critical Care Consortium Investigators (2022). Impact of renin-angiotensin-aldosterone system inhibition on mortality in critically ill COVID-19 patients with pre-existing hypertension: a prospective cohort study. BMC Cardiovascular Disorders, 22 (1) 123, 123. doi: 10.1186/s12872-022-02565-1
See Hoe, Louise E., Wildi, Karin, Obonyo, Nchafatso G., Bartnikowski, Nicole, McDonald, Charles, Sato, Kei, Heinsar, Silver, Engkilde-Pedersen, Sanne, Diab, Sara, Passmore, Margaret R., Wells, Matthew A., Boon, Ai-Ching, Esguerra, Arlanna, Platts, David G., James, Lynnette, Bouquet, Mahe, Hyslop, Kieran, Shuker, Tristan, Ainola, Carmen, Colombo, Sebastiano M., Wilson, Emily S., Millar, Jonathan E., Malfertheiner, Maximillian V., Reid, Janice D., O’Neill, Hollier, Livingstone, Samantha, Abbate, Gabriella, Sato, Noriko, He, Ting ... Fraser, John F. (2021). A clinically relevant sheep model of orthotopic heart transplantation 24 h after donor brainstem death. Intensive Care Medicine Experimental, 9 (1) 60, 1-24. doi: 10.1186/s40635-021-00425-4
Li Bassi, Gianluigi, Suen, Jacky Y., White, Nicole, Dalton, Heidi J., Fanning, Jonathon, Corley, Amanda, Shrapnel, Sally, Hinton, Samuel, Forsyth, Simon, Parsons, Rex, Laffey, John G., Fan, Eddy, Bartlett, Robert, Brodie, Daniel, Burrell, Aidan, Chiumello, Davide, Elhazmi, Alyaa, Grasselli, Giacomo, Hodgson, Carol, Ichiba, Shingo, Luna, Carlos, Marwali, Eva, Merson, Laura, Murthy, Srinivas, Nichol, Alistair, Panigada, Mauro, Pelosi, Paolo, Torres, Antoni, Ng, Pauline Yeung ... Obonyo, Nchafatso (2021). Assessment of 28-day in-hospital mortality in mechanically ventilated patients with coronavirus disease 2019: an international cohort study. Critical Care Explorations, 3 (11) e0567, e0567. doi: 10.1097/cce.0000000000000567
Walweel, K., Boon, A. C., See Hoe, L. E., Obonyo, N. G., Pedersen, S. E., Diab, S. D., Passmore, M. R., Hyslop, K., Colombo, S. M., Bartnikowski, N. J., Bouquet, M., Wells, M. A., Black, D. M., Pimenta, L. P., Stevenson, A. K., Bisht, K., Skeggs, K., Marshall, L., Prabhu, A., James, L. N., Platts, D. G., Macdonald, P. S., McGiffin, D. C., Suen, J. Y. and Fraser, J. F. (2021). Brain stem death induces pro-inflammatory cytokine production and cardiac dysfunction in sheep model. Biomedical Journal, 45 (5), 776-787. doi: 10.1016/j.bj.2021.10.007
Millar, Jonathan E., Wildi, Karin, Bartnikowski, Nicole, Bouquet, Mahe, Hyslop, Kieran, Passmore, Margaret R., Ki, Katrina K., See Hoe, Louise E., Obonyo, Nchafatso G., Neyton, Lucile, Pedersen, Sanne, Rozencwajg, Sacha, Baillie, J. Kenneth, Li Bassi, Gianluigi, Suen, Jacky Y., McAuley, Daniel F. and Fraser, John F. (2021). Characterizing preclinical sub-phenotypic models of acute respiratory distress syndrome: an experimental ovine study. Physiological Reports, 9 (19) e15048, e15048. doi: 10.14814/phy2.15048
Fanning, Jonathon P., Murthy, Srinivas, Obonyo, Nchafatso G., Baillie, J. Kenneth, Webb, Steve, Dalton, Heidi J. and Fraser, John F. (2021). Global infectious disease research collaborations in crises: building capacity and inclusivity through cooperation. Globalization and Health, 17 (1) 84, 1-6. doi: 10.1186/s12992-021-00731-2
Wells, Matthew A., See Hoe, Louise E., Molenaar, Peter, Pedersen, Sanne, Obonyo, Nchafatso G., McDonald, Charles I., Mo, Weilan, Bouquet, Mahè, Hyslop, Kieran, Passmore, Margaret R., Bartnikowski, Nicole, Suen, Jacky Y., Peart, Jason N., McGiffin, David C., Fraser, John F. and on behalf of the Dead Heart Project (2021). Compromised right ventricular contractility in an ovine model of heart transplantation following 24 h donor brain stem death. Pharmacological Research, 169 105631, 1-12. doi: 10.1016/j.phrs.2021.105631
Li Bassi, Gianluigi, Suen, Jacky Y, Dalton, Heidi J, White, Nicole, Shrapnel, Sally, Fanning, Jonathon P, Liquet, Benoit, Hinton, Samuel, Vuorinen, Aapeli, Booth, Gareth, Millar, Jonathan E, Forsyth, Simon, Panigada, Mauro, Laffey, John, Brodie, Daniel, Fan, Eddy, Torres, Antoni, Chiumello, Davide, Corley, Amanda, Elhazmi, Alyaa, Hodgson, Carol, Ichiba, Shingo, Luna, Carlos, Murthy, Srinivas, Nichol, Alistair, Ng, Pauline Yeung, Ogino, Mark, Pesenti, Antonio, Trieu, Huynh Trung ... Obonyo, Gikenyi N. (2021). An appraisal of respiratory system compliance in mechanically ventilated covid-19 patients. Critical Care, 25 (1) 199, 1-22. doi: 10.1186/s13054-021-03518-4
Maitland, Kathryn, Olupot-Olupot, Peter, Aloroker, Florence, Mpoya, Ayub, Mnjalla, Hellen, Passi, George, Nakuya, Margaret, Houston, Kirsty, Obonyo, Nchafatso, Hamaluba, Mainga, Evans, Jennifer A, Connon, Roisin, George, Elizabeth C and Gibb, Diana M (2021). Gastroenteritis Rehydration Of children with Severe Acute Malnutrition (GASTROSAM): a phase II randomised controlled trial: trial protocol. Wellcome Open Research, 6 160, 160. doi: 10.12688/wellcomeopenres.16885.1
McBride, Angela, Chanh, Ho Q., Fraser, John F., Yacoub, Sophie and Obonyo, Nchafatso G. (2020). Microvascular dysfunction in septic and dengue shock: pathophysiology and implications for clinical management. Global Cardiology Science and Practice, 2020 (2) e202029, e202029. doi: 10.21542/gcsp.2020.29
See Hoe, Louise E., Wells, Matthew A., Bartnikowski, Nicole, Obonyo, Nchafatso G., Millar, Jonathan E., Khoo, Aimee, Ki, Katrina K., Shuker, Tristan, Ferraioli, Alessandro, Colombo, Sebastiano M., Chan, Wandy, McGiffin, David C., Suen, Jacky Y. and Fraser, John F. (2020). Heart transplantation from brain dead donors: a systematic review of animal models. Transplantation, 104 (11), 2272-2289. doi: 10.1097/tp.0000000000003217
Walweel, K., Skeggs, K., Boon, A. C., See Hoe, L. E., Bouquet, M., Obonyo, N. G., Pedersen, S. E., Diab, S. D., Passmore, M. R., Hyslop, K., Wood, E. S., Reid, J., Colombo, S. M., Bartnikowski, N. J., Wells, M. A., Black, D., Pimenta, L. P., Stevenson, A. K., Bisht, K., Marshall, L., Prabhu, D. A., James, L., Platts, D. G., MacDonald, P. S., McGiffin, D. C., Suen, J. Y. and Fraser, J. F. (2020). Endothelin receptor antagonist improves donor lung function in an ex vivo perfusion system. Journal of Biomedical Science, 27 (1) 96, 96. doi: 10.1186/s12929-020-00690-7
Millar, Jonathan E., Bartnikowski, Nicole, Passmore, Margaret R., Obonyo, Nchafatso G, Malfertheiner, Maximillian V., von Bahr, Viktor, Redd, Meredith A., See Hoe, Louise, Ki, Katrina K., Pedersen, Sanne, Boyle, Andrew J., Baillie, J Kenneth, Shekar, Kiran, Palpant, Nathan, Suen, Jacky Y., Matthay, Michael A., McAuley, Daniel F., Fraser, John F. and Combining Extracorporeal Life Support and Cell Therapy in Critical Illness (CELTIC) investigators (2020). Combined mesenchymal stromal cell therapy and ECMO in ARDS: a controlled experimental study in sheep. American Journal of Respiratory and Critical Care Medicine, 202 (3) rccm.201911-2143OC, 383-392. doi: 10.1164/rccm.201911-2143oc
Obonyo, Nchafatso Gikenyi, Schlapbach, Luregn Jan and Fraser, John Francis (2020). Corrigendum: Sepsis: changing definitions, unchanging treatment (vol 6, 425, 2019). Frontiers in Pediatrics, 7 538, 538. doi: 10.3389/fped.2019.00538
Houston, Kirsty A., Gibb, Jack, Olupot-Olupot, Peter, Obonyo, Nchafatso, Mpoya, Ayub, Nakuya, Margaret, Muhindo, Rita, Uyoga, Sophie, Evans, Jennifer A., Connon, Roisin, Gibb, Diana M., George, Elizabeth C. and Maitland, Kathryn (2019). Gastroenteritis aggressive versus slow treatment for rehydration (GASTRO): a phase II rehydration trial for severe dehydration: WHO plan C versus slow rehydration. BMC Medicine, 17 (1) 122. doi: 10.1186/s12916-019-1356-z
Passmore, Margaret R., Obonyo, Nchafatso G., Byrne, Liam, Boon, Ai-Ching, Diab, Sara D., Dunster, Kimble R., Fung, Yoke L., Spanevello, Michelle M., Fauzi, Mohd H., Pedersen, Sanne E., Simonova, Gabriela, Anstey, Chris M., Shekar, Kiran, Tung, John-Paul, Maitland, Kathryn and Fraser, John F. (2019). Fluid resuscitation with 0.9% saline alters haemostasis in an ovine model of endotoxemic shock. Thrombosis Research, 176, 39-45. doi: 10.1016/j.thromres.2019.02.015
Millar, Jonathan E., Bartnikowski, Nicole, von Bahr, Viktor, Malfertheiner, Maximilian V., Obonyo, Nchafatso G., Belliato, Mirko, Suen, Jacky Y., Combes, Alain, McAuley, Daniel F., Lorusso, Roberto and Fraser, John F. (2019). Extracorporeal membrane oxygenation (ECMO) and the acute respiratory distress syndrome (ARDS): a systematic review of pre-clinical models. Intensive Care Medicine Experimental, 7 (1) 18, 18. doi: 10.1186/s40635-019-0232-7
Brent, Bernadette, Obonyo, Nchafatso, Akech, Samuel, Shebbe, Mohammed, Mpoya, Ayub, Mturi, Neema, Berkley, James A., Tulloh, Robert M. R. and Maitland, Kathryn (2019). Assessment of myocardial function in Kenyan children with severe, acute malnutrition the Cardiac Physiology in Malnutrition (CAPMAL) Study. JAMA Network Open, 2 (3). doi: 10.1001/jamanetworkopen.2019.1054
Fanning, Jonathon P., Hoe, Louise E. See, Passmore, Margaret R., Barnett, Adrian G., Obonyo, Nchafatso G., Millar, Jonathan E., Wesley, Allan J., Suen, Jacky Y. and Fraser, John F. (2019). Neuron specific enolase and matrix metalloproteinase 9 signal perioperative silent brain infarction during or after transcatheter aortic valve implantation. The American Journal of Cardiology, 123 (3), 434-439. doi: 10.1016/j.amjcard.2018.10.022
Obonyo, Nchafatso Gikenyi, Schlapbach, Luregn Jan and Fraser, John Francis (2019). Sepsis: changing definitions, unchanging treatment. Frontiers in Pediatrics, 6 (JAN) 425, 425. doi: 10.3389/fped.2018.00425
Obonyo, Nchafatso G., Byrne, Liam, Tung, John-Paul, Simonova, Gabriela, Diab, Sara D., Dunster, Kimble R., Passmore, Margaret R., Boon, Ai-Ching, See Hoe, Louise, Engkilde-Pedersen, Sanne, Esguerra-Lallen, Arlanna, Fauzi, Mohd H., Pimenta, Leticia P., Millar, Jonathan E., Fanning, Jonathon P., Van Haren, Frank, Anstey, Chris M., Cullen, Louise, Suen, Jacky, Shekar, Kiran, Maitland, Kathryn and Fraser, John F. (2019). Pre-clinical study protocol: Blood transfusion in endotoxaemic shock. MethodsX, 6, 1124-1132. doi: 10.1016/j.mex.2019.05.005
Passmore, Margaret R., Byrne, Liam, Obonyo, Nchafatso G., See Hoe, Louise E., Boon, Ai-Ching, Diab, Sara D., Dunster, Kimble R., Bisht, Kavita, Tung, John-Paul, Fauzi, Mohd H., Narula, Monica, Pedersen, Sanne E., Esguerra-Lallen, Arlanna, Simonova, Gabriela, Sultana, Annette, Anstey, Chris M., Shekar, Kiran, Maitland, Kathryn, Suen, Jacky Y. and Fraser, John F. (2018). Inflammation and lung injury in an ovine model of fluid resuscitated endotoxemic shock. Respiratory Research, 19 (1) 231, 231. doi: 10.1186/s12931-018-0935-4
Byrne, Liam, Obonyo, Nchafatso G., Diab, Sara D., Dunster, Kimble R., Passmore, Margaret R., Boon, Ai-Ching, See Hoe, Louise, Pedersen, Sanne, Hashairi Fauzi, Mohd, Pretti Pimenta, Leticia, Van Haren, Frank, Anstey, Christopher M., Cullen, Louise, Tung, John-Paul, Shekar, Kiran, Maitland, Kathryn and Fraser, John F. (2018). Unintended consequences: fluid resuscitation worsens shock in an ovine model of endotoxemia. American Journal of Respiratory and Critical Care Medicine, 198 (8), 1043-1054. doi: 10.1164/rccm.201801-0064OC
Byrne, Liam, Obonyo, Nchafatso G., Diab, Sara, Dunster, Kimble, Passmore, Margaret, Boon, Ai Ching, Hoe, Louise See, Hay, Karen, Van Haren, Frank, Tung, John-Paul, Cullen, Louise, Shekar, Kiran, Maitland, Kathryn and Fraser, John F. (2018). An ovine model of hyperdynamic endotoxemia and vital organ metabolism. Shock, 49 (1), 99-107. doi: 10.1097/SHK.0000000000000904
Malfertheiner, M. V., Pimenta, L. P., Von Bahr, V., Millar, J. E., Obonyo, N. G., Suen, J. Y., Pellegrino, V. and Fraser, J. F. (2017). Acquired von willebrand syndrome in respiratory extracorporeal life support: A systematic review of the literature. Critical Care and Resuscitation, 19, 45-52.
Houston, Kirsty A., Gibb, Jack G., Mpoya, Ayub, Obonyo, Nchafatso, Olupot-Olupot, Peter, Nakuya, Margeret, Evans, Jennifer A., George, Elizabeth C., Gibb, Diana M. and Maitland, Kathryn (2017). Gastroenteritis Aggressive Versus Slow Treatment For Rehydration (GASTRO). A pilot rehydration study for severe dehydration: WHO plan C versus slower rehydration. Wellcome Open Research, 2 62, 62. doi: 10.12688/wellcomeopenres.12261.1
Chan, Jonathan, Shiino, Kenji, Obonyo, Nchafatso G., Hanna, Joseph, Chamberlain, Robert, Small, Andrew, Scalia, Isabel G., Scalia, William, Yamada, Akira, Hamilton-Craig, Christian R., Scalia, Gregory M. and Zamorano, Jose Luis (2017). Left Ventricular Global Strain Analysis by Two-Dimensional Speckle-Tracking Echocardiography: The Learning Curve. Journal of the American Society of Echocardiography, 30 (11), 1081-1090. doi: 10.1016/j.echo.2017.06.010
Obonyo, Nchafatso, Brent, Bernadette, Olupot-Olupot, Peter, van Hensbroek, Michael Boele, Kuipers, Irene, Wong, Sidney, Shiino, Kenji, Chan, Jonathan, Fraser, John, van Woensel, Job B. M. and Maitland, Kathryn (2017). Myocardial and haemodynamic responses to two fluid regimens in African children with severe malnutrition and hypovolaemic shock (AFRIM study). Critical Care, 21. doi: 10.1186/s13054-017-1679-0
Obonyo, Nchafatso G., Fanning, Jonathon P., Ng, Angela S. Y., Pimenta, Leticia P., Shekar, Kiran, Platts, David G., Maitland, Kathryn and Fraser, John F. (2016). Effects of volume resuscitation on the microcirculation in animal models of lipopolysaccharide sepsis: a systematic review. Intensive Care Medicine Experimental, 4 (1) 38, 1-16. doi: 10.1186/s40635-016-0112-3
Dossajee, Hussein, Obonyo, Nchafatso and Ahmed, Syed Masud (2016). Career preferences of final year medical students at a medical school in Kenya-a cross sectional study. BMC Medical Education, 16 (1) 5. doi: 10.1186/s12909-016-0528-1
Obonyo, Nchafatso and Maitland, Kathryn (2014). Fluid management of shock in severe malnutrition: what is the evidence for current guidelines and what lessons have been learned from clinical studies and trials in other pediatric populations?. Food and Nutrition Bulletin, 35 (2), S71-S78. doi: 10.1177/15648265140352S111
Brent, Bernadette, Obonyo, Nchafatso and Maitland, Kathryn (2012). Tailoring management of severe and complicated malnutrition: more research is required first. Pathogens and Global Health, 106 (4), 197-199. doi: 10.1179/2047772412Z.00000000061
Mwachaka, Philip M., Ranketi, Simeon S., Nchafatso, Obonyo G., Kasyoka, Ben M. and Kiboi, Julius G. (2011). Spinal tuberculosis among human immunodeficiency virus-negative patients in a Kenyan tertiary hospital: a 5-year synopsis. The Spine Journal, 11 (4), 265-269. doi: 10.1016/j.spinee.2011.01.033
Mwachaka, Philip M., Obonyo, Nchafatso G., Mutiso, Ben K., Ranketi, Simeon and Mwang'ombe, Nimrod (2010). Ventriculoperitoneal shunt complications: a three-year retrospective study in a Kenyan National Teaching and Referral Hospital. Pediatric Neurosurgery, 46 (1), 1-5. doi: 10.1159/000314050
Awori, M. N., Ogendo, S. W. O., Gitome, S. W., Ong'uti, S. K. and Obonyo, N. G. (2007). Management pathway for congenital heart disease at Kenyatta National Hospital, Nairobi. The East African Medical Journal, 84 (7), 312-317. doi: 10.4314/eamj.v84i7.9585
Conference Papers
Fior, Gabriele, Lloyd, Benjamin, Liu, Keibun, Milani, Angelo, Obonyo, Nchafatso, Hoshino, Kota, Nonaka, Hideaki, Abbate, Gabriella, Portatadino, Sofia, Panduru, Rachana, Hyslop, Kieran, Passmore, Margaret, Meechan-Brown, Carolyn, Redmond, Kendal, Slaughter, Richard, Garlick, Bruce, Mcgiffin, David, Suen, Jacky, Fraser, John and Li Bassi, Gianluigi (2024). In vivo isolated lung perfusion: an innovative platform for assessing lung injury propagation in ARDS. European Respiratory Society Congress (ERS), Vienna, Austria, 7-11 September 2024. Sheffield, United Kingdom: European Respiratory Society. doi: 10.1183/13993003.congress-2024.pa845
Nonaka, Hideaki, Liu, Keibun, Milani, Angelo, Fior, Gabriele, Hoshino, Kota, Obonyo, Nchafatso, Portatadino, Sofia, Abbate, Gabriella, Panduru, Rachana, McInerney, Molly-Rose, Passmore, Margaret, Li Bassi, Gianluigi, Suen, Jacky and Fraser, John F. (2024). Development of Right Ventricular Dysfunction Induced by Respiratory Failure: Insights from an Ovine Model of Acute Respiratory Distress Syndrome and Veno-Venous Extracorporeal Membrane Oxygenation. 35th Annual ELSO Conference, Detroit, MI United States, 28 September - 1 October 2024. Philadelphia, PA United States: Lippincott Williams & Wilkins. doi: 10.1097/01.mat.0001070112.10477.fa
Dhanapathy, V., Obonyo, N., White, N., Sela, D., Rachakonda, R., Tunbridge, M., Sim, B., Teo, D., Hoe, L. See, Fanning, J., Tung, J., Suen, J. and Fraser, J. (2023). Effects of Red Blood Cell Transfusion on Patients Undergoing Cardiac Surgery in Queensland—A Retrospective Cohort Study. 71st Annual Scientific Meeting of the Cardiac Society of Australia and New Zealand, Adelaide, SA Australia, 3-6 August 2023. Chatswood, NSW Australia: Elsevier. doi: 10.1016/j.hlc.2023.06.458
Sato, K., Heinsar, S., Obonyo, N., Wildi, K., Liu, K., Farah, S., Ainola, C., Sato, N., Ijuin, S., Ro, S. Kyun, Fior, G., Gandini, L., Bouquet, M., Wilson, E., Passmore, M., Hyslop, K., Chan, J., Platts, D., Scalia, G., Suen, J., Bassi, G. Li and Fraser, J. (2023). A novel speckle-tracking echocardiographic parameter assessing left ventricular loading during VA ECMO in a pre-clinical model of cardiogenic shock. 71st Annual Scientific Meeting of the Cardiac Society of Australia and New Zealand, Adelaide, SA Australia, 3-6 August 2023. Chatswood, NSW Australia: Elsevier. doi: 10.1016/j.hlc.2023.06.562
Sato, Kei, Heinsar, Silver, Wildi, Karin Susanne, Obonyo, Nchafatso, Liu, Keibun, Farah, Samia, Ainola, Carmen, Sato, Noriko, Fior, Gabriele, Ro, Sun Kyun, Gandini, Lucia, Ijuin, Shinichi, Bouquet, Mahe, Wilson, Emily, Passmore, Margaret, Hyslop, Kieran, Chan, Jonathan H., Platts, David, Suen, Jacky, Li Bassi, Gianluigi and Fraser, John (2023). A novel speckle-tracking echocardiographic parameter considering left ventricular loading condition in cardiogenic shock during VA ECMO. 72nd Annual Scientific Session (ACC), New Orleans, LA, United States, 4-6 March 2023. San Diego, CA, United States: Elsevier.
See Hoe, Louise E., Bouquet, Mahe, Hyslop, Kieran, Passmore, Margaret R., Wells, Matthew A., Sato, Kei, Wilson, Emily, Wildi, Karin, Skeggs, Kris, Palmeri, Chiara, Reid, Janice, O'Neill, Hollier, Bartnikowski, Nicole, Jung, Jae-Seung, Ainola, Carmen, Abbate, Gabriella, Colombo, Sebastiano M., Obonyo, Nchafatso G., McDonald, Charles, Shuker, Tristan, Heinsar, Silver, Haymet, Andrew, Pedersen, Sanne, Molenaar, Peter, Li Bassi, Gianluigi, Suen, Jacky Y., McGiffin, David C. and Fraser, John F. (2022). Hypothermic ex vivo perfusion of donor hearts can safely preserve post-transplant cardiac function in sheep for 8 hours. Experimental Biology 2022 Meeting, Philadelphia, PA United States, 2-5 April 2022. Hoboken, NJ United States: John Wiley & Sons. doi: 10.1096/fasebj.2022.36.S1.R3270
See Hoe, L., Bouquet, M., Hyslop, K., Passmore, M., Wells, M., Sato, K., Wilson, E., Wildi, K., Skeggs, K., Palmeri, C., Reid, J., O'Neill, H., Bartnikowski, N., Jung, J., Ainola, C., Abbate, G., Colombo, S., Obonyo, N., McDonald, C., Shuker, T., Heinsar, S., Haymet, A., Engkilde-Pedersen, S., Peart, J., Molenaar, P., Li Bassi, G., Suen, J., McGiffin, D. and Fraser, J. (2022). Post-transplant cardiac contractility and mitochondrial function is preserved following 8 hours hypothermic ex vivo perfusion in sheep. 70th Annual Scientific Meeting of the Cardiac Society of Australia and New Zealand, Gold Coast, QLD, Australia, 11-14 August 2022. Chatswood, NSW, Australia: Elsevier. doi: 10.1016/j.hlc.2022.06.547
Hoe, L. E. See, Wildi, K., Skeggs, K., Bouquet, M., Sato, K., Jung, J., Ainola, C., Hyslop, K., Heinsar, S., Abbate, G., Colombo, S. M., Passmore, M., Wood, E. S., Wells, M., Bartnikowski, N., O'Neill, H., Reid, J., Shuker, T., Haymet, A., Livingstone, S., Sato, N., Obonyo, N., James, L., He, T., McDonald, C., Mullins, D., Engkilde-Pedersen, S., Diab, S., Millar, J. E. ... Fraser, J. F. (2021). Donor heart preservation by hypothermic ex vivo perfusion - improved recipient survival and successful prolongation of ischemic time. ISHLT 41st Annual Meeting, Virtual, 24-28 April 2021. Philadelphia, PA, United States: Elsevier. doi: 10.1016/j.healun.2021.01.1864
Wells, Matthew, Seehoe, Louise, Zechovic, Olivia, Nchafatso, Obonyo, Bouquet, Mahe, Hyslop, Keiran, Black, Deborah, McDonald, Charles, Pedersen, Sanne, Suen, Jacky, Peart, Jason, McGiffin, David, Fraser, John and Lye, India (2020). Donor brain stem death and cardiac transplantation causes mitochondrial dyscoupling and oxidative stress. World Congress of Intensive Care, Melbourne, VIC Australia, 14-18 October 2019. Philadelphia, PA USA: Elsevier. doi: 10.1016/j.aucc.2020.04.098
Hoe, L. E. See, Wells, M. A., Bouquet, M., Hyslop, K., Passmore, M. R., Bartnikowski, N., Obonyo, N. G., Reid, J., O'Neill, H., Shuker, T., McDonald, C., Engkilde-Pedersen, S., Wildi, K., Ainola, C., Skeggs, K., Jung, J., Colombo, S., Sato, K., James, L., He, P., Wood, E. S., Heinser, S., Wang, X., Abbate, G., Livingstone, S., Haymet, A., Walweel, K., Mullins, D., Marasco, S. ... Fraser, J. F. (2020). Metabolic and mitochondrial alterations following brain death and heart transplantation. 40th Annual Meeting and Scientific Sessions of the International Society for Heart and Lung Transplantation (ISHLT), Montreal, Canada, 22-25 April 2020. Philadelphia, PA, United States: Elsevier. doi: 10.1016/j.healun.2020.01.419
See Hoe, L., McGiffin, D., Wildi, K., Obonyo, N., Bouquet, M., Wells, M., Skeggs, K., McDonald, C., Engkilde-Pedersen, S., Bartnikowski, N., Colombo, S., Ainola, C., Passmore, M., Hyslop, K., Wood, E., Shuker, T., Sato, K., Jung, J., Heinser, S., James, L., Reid, J., O'Neill, H., Livingstone, S., Abbate, G., He, P., Sato, N., Boon, C., Black, D., Haymet, A. ... Fraser, J. (2020). Hypothermic ex vivo perfusion of brain dead donor hearts improves survival, systemic inflammation and cardiac function following heart transplantation. 8th Cardiac Society of Australia and New Zealand Annual Scientific Meeting, the International Society for Heart Research Australasian Section Annual Scientific Meeting and the 14th Annual Australia and New Zealand Endovascular Therapies Meeting, Online, 11-13 December 2020. Chatswood, NSW Australia: Elsevier. doi: 10.1016/j.hlc.2020.09.127
Sato, K., See Hoe, L., Obonyo, N., Wildi, K., Colombo, S., Bouquet, M., Passmore, M., Bartnikowski, N., Wells, M., Skeggs, K., McDonald, C., Hyslop, K., Wood, E., Heinser, S., Ainola, C., Jung, J., James, L., Abbate, G., Haymet, A., Engkilde-Pedersen, S., Reid, J., O'Neill, H., Shuker, T., He, P., Sato, N., Diab, S., Mullins, D., Livingstone, S., Wang, X. ... Fraser, J. (2020). Hypothermic ex vivo perfusion preserves post-transplant donor cardiac function. 8th Cardiac Society of Australia and New Zealand Annual Scientific Meeting, the International Society for Heart Research Australasian Section Annual Scientific Meeting and the 14th Annual Australia and New Zealand Endovascular Therapies Meeting, Virtual, 11-13 December 2020. Chatswood, NSW Australia: Elsevier. doi: 10.1016/j.hlc.2020.09.128
Wells, Matthew, Molenaar, Peter, Hoe, Louise See, Obonyo, Nchafatso, James, Lynette, Bouquet, Mahe, Bartnikowski, Nicole, Passmore, Margaret, Boone, Connie, Wilde, Karin, Weilan, Mo, Hyslop, Kieran, McDonald, Charles, Pedersen, Sanne, Suen, Jacky, Peart, Jason, McGiffin, David and Fraser, John (2020). (-)-Noradrenaline sensitivity, contractility and mitochondrial function in an ovine model of brain stem death and transplantation. 2019 ISHR World Congress, Beijing, China, 3-6 June 2019. London, United Kingdom: Academic Press. doi: 10.1016/j.yjmcc.2019.11.114
Hoe, L. See, Shuker, T., Bartnikowski, N., Passmore, M., Bouquet, M., Obonyo, N., Engkilde-Pedersen, S., McDonald, C., Wells, M., Boon, A., Hyslop, K., James, L., Wildi, K., Cullen, L., Bassi, G. Li, Suen, J., McGiffin, D. and Fraser, J. (2019). Characterisation of cardiac neurohormonal and inflammatory changes induced by brain death in a novel ovine heart transplant model. 67th Cardiac Society of Australia and New Zealand Annual Scientific Meeting, the International Society for Heart Research Australasian Section Annual Scientific Meeting and the 13th Annual Australia and New Zealand Endovascular Therapies Meeting, Adelaide, Australia, 8-11 August 2019. chatswood, NSW, Australia: Elsevier. doi: 10.1016/j.hlc.2019.06.074
Fanning, Jonathon P., Obonyo, Nchafatso G., Tung, John-Paul, Byrne, Liam, Simonova, Gabriela, Diab, Sara, Dunster, Kimble, Passmore, Margaret, Boon, Ai-Ching, See Hoe, Louise, Engkilde-Pedersen, Sanne, Esguerra-Lallen, Arlanna, Hashairi Fauzi, Mohd, Pretti Pimenta, Leticia, Millar, Jonathan, Anstey, Christopher, van Haren, Frank, Cullen, Louise, Suen, Jacky, Shekar, Kiran, Maitland, Kathryn and Fraser, John (2018). Packed Red Cell Age Associated With Adverse Cardiovascular Changes in an Ovine Model of Septic Shock Resuscitation. American Heart Association's 2018 Scientific Sessions, Chicago, IL United States, 10-12 November 2018. Philadelphia, PA United States: Lippincott Williams & Wilkins. doi: 10.1161/circ.138.suppl_1.17116
Obonyo, N., Byrne, L., Shiino, K., Diab, S., Dunster, K., Passmore, M., Boon, A.C., See Hoe, L., Pedersen, S., Fauzi, M., Pimenta, L., Van Haren, F., Shekar, K., Anstey, C., Tung, J.P., Cullen, L., Platts, D., Chan, J., Maitland, K. and Fraser, J. (2018). Fluid resuscitation with 0.9% saline impairs myocardial contractility in an ovine model of endotoxemic shock. 9th Congress of the World Federation of Pediatric Intensive & Critical Care Societies (WFPICCS 2018), Singapore, 9-13 June 2018. Philadelphia, PA United States: Lippincott Williams & Wilkins. doi: 10.1097/01.pcc.0000538016.15507.8c
Houston, K., Gibb, J., Mpoya, A., Obonyo, N., Olupot-Olupot, P., George, E., Gibb, D. and Maitland, K. (2018). G265(P) Gastroenteritis aggressive versus slow treatment for rehydration (gastro study): a descriptive analysis. Annual Conference of Royal College of Paediatrics and Child Health, Glasgow, United Kingdom, 13-15 March 2018. London, United Kingdom: BMJ Publishing Group. doi: 10.1136/archdischild-2018-rcpch.258
Boon, A. C., Hoe, L. E. See, Pederson, S. E., Obonyo, N. G., Wells, M. A., Bartnikowski, N. J., Passmore, M. R., Marshall, L., James, L., Tung, J., Suen, J. Y., Macdonald, P. S., McGiffin, D. C. and Fraser, J. F. (2018). Inflammatory cytokine profiles in 24-hour brain stem death model. 38th Annual Meeting and Scientific Sessions of the International-Society-for-Heart-and-Lung-Transplantation (ISHLT), Nice, France, 11-14 April 2018. Philadelphia, PA United States: Elsevier. doi: 10.1016/j.healun.2018.01.506
See Hoe, L., Engkilde-Pedersen, S., Obonyo, N., Wells, M., Boon, C., Bartnikowski, N., Passmore, M., McDonald, C., Black, D., Molenaar, P., Diab, S., Suen, J., Marasco, S., McGiffin, D. and Fraser, J. (2018). Development of an ovine model of heart transplantation following 24-hour brain stem death. 66th Cardiac Society of Australia and New Zealand Annual Scientific Meeting, the International Society for Heart Research Australasian Section Annual Scientific Meeting and the 12th Annual Australia and New Zealand Endovascular Therapies Meeting, Brisbane, Australia, 2-5 August 2018. Chatswood, NSW, Australia: Elsevier . doi: 10.1016/j.hlc.2018.06.111
Fanning, Jonathon P., Obonyo, Nchafatso G., Tung, John-Paul, Byrne, Liam, Simonova, Gabriela, Diab, Sara, Dunster, Kimble, Passmore, Margaret, Boon, Ai-Ching, Hoe, See Louise, Engkilde-Pedersen, Sanne, Esguerra-Lallen, Arlanna, Fauzi, Hashairi Mohd, Pretti, Pimenta Leticia, Millar, Jonathan, Anstey, Christopher, van Haren, Frank, Cullen, Louise, Suen, Jacky, Shekar, Kiran, Maitland, Kathryn and Fraser, John (2018). Packed red cell age associated with adverse cardiovascular changes in an ovine model of septic shock resuscitation. -, -, 2018. Philadelphia, PA United States: Lippincott Williams & Wilkins.
Bartnikowski, N., Obonyo, N., Pedersen, S., Wells, M., Millar, J., Raffel, O., Suen, J., Gregory, S., Haqqani, H. and Fraser, J. (2018). Development of an ovine model of dilated cardiomyopathy to facilitate clinically translational research. 66th Cardiac Society of Australia and New Zealand Annual Scientific Meeting, the International Society for Heart Research Australasian Section Annual Scientific Meeting and the 12th Annual Australia and New Zealand Endovascular Therapies Meeting, Brisbane, QLD Australia, 2 - 5 August 2018. Chatswood, NSW Australia: Elsevier . doi: 10.1016/j.hlc.2018.06.110
See Hoe, L., Obonyo, N., Byrne, L., Shiino, K., Diab, S., Dunster, K., Passmore, M., Boon, C., Engkilde-Pedersen, S., Esguerra, A., Fauzi, M., Pretti Pimenta, L., Simonova, G., Van Haren, F., Shekar, K., Anstey, C., Tung, J., Cullen, L., Platts, D., Chan, J., Maitland, K. and Fraser, J. (2018). Fluid resuscitation with 0.9% saline impairs myocardial contractility in an ovine model of endotoxaemic shock. 66th Cardiac Society of Australia and New Zealand Annual Scientific Meeting, the International Society for Heart Research Australasian Section Annual Scientific Meeting and the 12th Annual Australia and New Zealand Endovascular Therapies Meeting, Brisbane, Australia, 2-5 August 2018. Chatswood, NSW, Australia: Elsevier. doi: 10.1016/j.hlc.2018.06.129
Tsui, Michelle, Obonyo, Nchafatso G., Boon, Ai Ching, Hoe, Louise See, Bartnikowski, Nicole J., Passmore, Margaret R., Pedersen, Sanne Engkilde S. P., Diab, Sara D., McGiffin, David C. and Fraser, John F. (2018). Pre-transplant microcirculatory profile in an ovine model of brain stem death. Owen Wangensteen Scientific Forum / Annual Clinical Congress of the American-College-of-Surgeons (ACS), Boston, MA, United States, 21-25 October 2018. New York, United States: Elsevier. doi: 10.1016/j.jamcollsurg.2018.08.608
Fanning, Jonathon P., Hoe, See Louise E., Passmore, Margaret R., Barnett, Adrian G., Obonyo, Nchafatso G., Millar, Jonathan E., Suen, Jacky Y. and Fraser, John F. (2018). Neuron specific enolase and matrix metaloproteinase 9 signal silent brain infarction associated with TAVI. Philadelphia, PA, United States: Lippincott Williams & Wilkins.
Tung, John-Paul, Simonova, Gabriela, Engkilde-Pedersen, Sanne, Esguerra-Lallen, Arlanna, Sultana, Annette, Hewlett, Elise, Obonyo, Nchafatso, Millar, Jonathan, Flower, Robert and Fraser, John (2017). Point-of-care testing in an ovine model of transfusion-related acute lung injury (TRALI). Pathology Update 2017, Sydney, NSW Australia, 24-26 February 2017. Oxford, United Kingdom: Elsevier. doi: 10.1016/j.pathol.2016.12.309
Obonyo, N., Bartnikowski, N., Haqqani, H., Pedersen, S., Millar, J., He, C., Shiino, K., Chan, J., Platts, D., Raffel, O., Gregory, S. and Fraser, J. (2017). Heart failure pre-clinical model development: echocardiography and cardiac strain evaluation. 65th Cardiac Society of Australia and New Zealand Annual Scientific Meeting and the International Society for Heart Research Australasian Section Annual Scientific Meeting, Perth, WA Australia, 10-13 August 2017. Chatswood, NSW Australia: Elsevier Australia. doi: 10.1016/j.hlc.2017.06.212
Thesis
Obonyo, Nchafatso Gikenyi (2021). Myocardial and microvascular physiology in septic shock and response to volume expansion treatment. PhD Thesis, Life, Health and Chemical Sciences; Faculty of Science Technology, Engineering and Mathematics, The Open University of London, United Kingdom. doi: 10.21954/ou.ro.00011dde
Preprint
Millar, Jonathan E., Wildi, Karin, Bartnikowski, Nicole, Bouquet, Mahe, Hyslop, Kieran, Passmore, Margaret R., Ki, Katrina K., See Hoe, Louise E., Obonyo, Nchafatso G., Neyton, Lucile, Pedersen, Sanne, Rozencwajg, Sacha, Baillie, J. Kenneth, Li Bassi, Gianluigi, Suen, Jacky Y, McAuley, Daniel F. and Fraser, John F. (2020). Characterising pre-clinical sub-phenotypic models of Acute Respiratory Distress Syndrome: an experimental ovine study.