| abstract |
A detector assembly (1) is described. The detector assembly (1) is for determining a ratio of lactate to pyruvate from dialysis, preferably microdialysis for example cerebral microdialysis. The detector assembly comprises: a first pump (11A) of a set of pumps (11), a dialysis probe (12), preferably a microdialysis probe, having an inlet (121) and an outlet (122), a first tube (110A) of a set of tubes (110) arranged to fluidically couple the first pump (11A) to the inlet (121) of the dialysis probe (12), an infrared, IR, detector (13), a second tube (110B) of the set of tubes (110) arranged to fluidically couple the outlet (122) of the dialysis probe (12) to the IR detector (13) and a controller (14); wherein the first pump (11A) is arranged to pump a perfusate (P) at a first flow rate (F1) of a set of flow rates to the dialysis probe (12), inserted into a fluid, for example a bodily fluid, and/or an organ of and/or for a patient, via the first tube (110A) and to in turn pump, at least in part, a dialysate (D) at a second flow rate (F2) of the set of flow rates from the dialysis probe (12) to the IR detector (13) via the second tube (110B); wherein the IR detector (13) is arranged to detect respective absorbances due, at least in part, to lactate and pyruvate in the dialysate (D); and wherein the controller (14) is arranged to determine the ratio of lactate to pyruvate in the dialysate based, at least in part, on the detected respective absorbances. |