A photo of Michael Losos.

Michael Losos, MD

  • Assistant Medical Director of Clinical Laboratories, Division of Pathology and Laboratory Medicine
  • Assistant Professor, UC Department of Pathology and Laboratory Medicine
As a pathologist, I treat each case as the most important thing I am doing. I won't rest easy until I have helped or made a positive influence on the patient's outcome.



I am a clinical pathologist with a special interest in transfusion medicine. I also have expertise in caring for ECMO (extracorporeal membrane oxygenation) patients and managing their coagulation status. As a pathologist, I treat each case as the most important thing I am doing. I won't rest easy until I have helped or made a positive influence on the patient's outcome.

One of my professors at medical school had a significant influence on my career choice as a pathologist. Through the work he did in diagnosing people's diseases, he made the world a better place. He always had time for colleagues and students. I aspire to be that good of a person each day.

I was honored to receive the Baylor College of Medicine Clinical Pathology resident teaching award during my time at Texas Children’s Hospital.

My research focuses on transfusion medicine topics such as blood product utilization and enhancement. I also study coagulation issues and disorders.

Outside of work, I love to read sci-fi novels and am an avid movie lover.

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Impact of mobilization regimen on multiday collection of peripheral blood CD34+ cells by large volume leukapheresis. Siddiqui, I; Shmookler, A; Biller, E; Hardy, T; Hartage, R; Losos, M; Chen, J. Transfusion. 2022; 62:857-862.

Use of Bivalirudin-Specific Monitoring Assays in Ventricular Assist Device Patients. Engel, E; Losos, M; Martin, J; Palumbo, JS; Lorts, A; Geer, R; Luchtman-Jones, L. Blood. 2021; 138:3236-3236.

ABO-incompatible deceased donor pediatric liver transplantation: Novel titer-based management protocol and outcomes. Mysore, KR; Himes, RW; Rana, A; Teruya, J; Desai, MS; Srivaths, PR; Zaruca, K; Calvert, A; Guffey, D; Minard, CG; et al. Pediatric Transplantation. 2018; 22.

Does rotational thromboelastometry accurately predict coagulation status in patients with lupus anticoagulant?. Hensch, L; Kostousov, V; Bruzdoski, K; Losos, M; Pereira, M; de Guzman, M; Hui, S; Teruya, J. International Journal of Laboratory Hematology. 2018; 40:521-526.

Irradiation and prolonged storage of red cells are associated with increased adverse events. Chen, J; Biller, E; Losos, M; Li, J; Hamad, D; Blower, L; Grevenow, M; Oakley, J. Vox Sanguinis. 2018.

Prolonged platelet storage associated with increased frequency of transfusion-related adverse events. Losos, M; Biller, E; Li, J; Blower, L; Hamad, D; Patel, G; Scrape, S; Cataland, S; Chen, J. Vox Sanguinis. 2018; 113:170-176.

The tipping point: The critical role of therapeutic apheresis in a case of refractory acquired hemophilia. Losos, M; Scrape, S; Joshi, S; Shmookler, A; Chen, J. Journal of Clinical Apheresis. 2017; 32:564-566.

Increased complement activation during platelet storage. Chen, J; Losos, M; Yang, S; Li, J; Wu, H; Cataland, S. Transfusion. 2017; 57:2182-2188.

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