There were heat absorption and a rebound of temperature after hypothermic cardiopulmonary bypass and special materials in the cardiopulmonary bypass process.

• 提示体外循环术后，体温短时间内变化较大，高热的原因除一般的吸收热外，与手术中低温、复温后体温反跳以及体外循环过程中产生的特殊物质有关。