Patent ID: 6936026

Claim:
A micro perfusion device connectable to a perfusate supply and for obtaining at least one constituent of a body fluid, the device comprising: a casing including a discharge channel; a perfusion catheter including a proximal end in fluid communication with the discharge channel and a distal end having a distal opening; and a hollow injection needle including a proximal end having a proximal opening and a distal end having a discharge opening, wherein said injection needle is slideably displaceable through the casing and the perfusion catheter between a forward position and a rearward position, wherein the injection needle protrudes through the distal opening of the perfusion catheter when the injection needle is in the forward position, wherein the discharge opening of the injection needle resides within the perfusion catheter distal when the injection needle is in the rearward position, and wherein, in the rearward position, the proximal opening of the injection needle is adapted to be in fluid communication with the perfusate supply.