Abstract：This paper provided the analysis, solutions and discussion of Gambro AK200 hemodialysis equipment through two malfunction
cases. The case one was coused by degassing module, and the case two was coused by failure of concentration detection, both were resulted
from leakage of piping system. Despite the slight differences of the solution, the operating principle and analysis were different. The ideas
and methods provided by this paper are viable with low cost, which can provide technical reference for dialysis maintenance personnel.
