The “IBR” style microdialysis probe facilitates infusing a treatment directly to the area being dialyzed.  Unlike when administering a treatment systemically or via retrodialysis through a microdialysis probe membrane, when this probe is used, you can both target your treatment with anatomical specificity and know exactly how much drug you have administered.  This can also address solubility or molecular weight issues of retrodialysis. The infusate exits the infusion cannula at the distal tip of the microdialysis membrane just outside the membrane lumen.


Name IBR-2, Combination Infusion and Microdialysis Probe, 2mm membrane*
IBR-4, Combination Infusion and Microdialysis Probe, 4mm membrane**


Part Number MD-2262, IBR-2, 2mm membrane
MD-2264, IBR-4, 4mm membrane


Cannula Coated fused silica


Probe Volume 2.1 to 2.3 µL (IBR-2 or IBR-4)


Infusion Cannula Coated fused silica


Use Use with optional intracerebral guide cannula, or mount directly on skull using acrylic cement. Commonly used for rats, hamsters, and guinea pigs.  Non-metallic, can be used for NMR imaging.


Membrane PAN. 30KDa MWCO, 320µm OD


Dimensions Membrane


OD 320µm ID 220µm
Infusion Cannula Tip


OD 105µm ID 40µm
Infusion Cannula Swept Volume


0.56 µL
Probe Cannula Diameter


OD 510µm ID 360µm
Probe Cannula Length


15 mm
Probe Cannula Length
when in BASi guide cannula


10 mm
Head Diameter


Tubing Inlet/Outlet


OD 635µm ID 254µm

* single customization only, ** cannot customize

IBR Combination Infusion & Microdialysis BRain Probe