Extracellular fluid micro dialysis and liquid collecting device

The utility model discloses an extracellular fluid micro dialysis and liquid collecting device, comprising a part of micro dialysis needle and a liquid collecting part. The external of the micro dialysis needle is an outer tube of needle, and the internal of the micro dialysis needle is an inner tube of micro glass. An outflow for dialysate is positioned at the end of the inner tube of micro glass, and the sidepiece of an outer sleeve tube is connected with an outlet tube for extracellular fluid. The liquid collecting part comprises a fluid collector and an outer sleeve tube for fluid collector, and the fluid collector is connected with the outlet tube for the extracellular fluid. By using the extracellular fluid micro dialysis and liquid collecting device, the damage of tissue is small, the blocking is not easy to happen, the dialysis area is large, and the particle size range of extracted material is broad. The dead space part of the liquid collecting tube is greatly reduced, the experimental time can be economized, and the time-point accuracy of the experimental index can be improved. The sample is isolated from air to avoid that the residual air in environment and container influences the parameters of blood gas analysis. The utility model can be used for medical scientific research, teaching experiments, etc.