Development of new colloid osmotic pressure measurement method using ultrafiltration membrane during cardiopulmonary bypassTakeshi Matsumoto, Kiyoshi Yoshida, Tomotaka Shinohara, Eiji Miyoshi and Takayoshi UenoJ Extra Corpor Technol, 55 4 (2023) 167-174DOI: https://doi.org/10.1051/ject/2023028