| abstract |
A blood-compatible material having a specific equilibrium water content is provided as a blood-compatible material that suppresses platelet adhesion and activation, and a surface that contacts the blood-compatible polymer and heparin with blood. Provision of medical instruments to be provided. An equilibrium water content when water is contained is 3 to 8%, and an exothermic peak based on low-temperature crystallization of water is observed at 0 ° C. or less in a heating process in a differential scanning calorimeter (DSC) measurement. A water-insoluble blood-compatible polymer which can have water (intermediate water) and has a glass transition point of 0 ° C. or lower. [Selection diagram] None |