The invention relates to a secure system for the perfusion of a body liquid, enabling a final control of compatability of a treatment with the patient and/or the medical situation previously diagnosed by a doctor, in a simple, efficient and energy-saving manner. To this end, the system according to the invention comprises: a fluidic circuit of a perfusion (100, 1000) comprising a perfusion catheter (101), a perfusion tubing (102, 1002) and a container (103, 1003) for the determined perfusion product to be perfused to a patient (B) a means (400) for taking a body liquid sample from a patient a sampling container (303) provided with a means (300) for fluidic connection to the means (400) for taking the sample a means (710, 721) of analysis and comparison (710, 721) of the body liquid taken and a sample (810) of the determined product a means for fluidic connection between the analysis means and the sampling container and a means (731) for controlling the flow of the perfusion product in the tubing, the analysis and comparison means transmitting information (IC) for comparing the body liquid (302) taken and the determined production sample (810) to the flow control means.
