Brain "BR" Intracerebral Guide Cannula

These guide cannula fit BASi's most popular "BR" style brain microdialysis probes. If you are working with mice, see the MBR style guides.

  • Provides pre-experiment surgical targeting when microdialysis sampling from awake animals.
  • Permits insertion of probes following surgical recovery.
  • Facilitates post-experiment microdialysis probe removal and potential probe reuse.
  • For use with BR, IBR, Infusion, and custom BR microdialysis probes.
  • O-ring is non-metallic and can be used for NMR imaging (MRI).


There are two versions of this guide. They differ in how they secure the probe or stylet in the guide:

  1. One uses a rubber O-ring that lightly snaps into the notch in the probe or stylet head when inserted. Removal is equally simple.
  2. The other uses an Ω (Omega) ring that can be turned to open the ring's window to allow insertion of a probe or stylet. When the omega ring is turned further, closing the window, the probe/stylet is locked securely in place. Removal is equally simple.
Intracerebral Guide Cannula and Stylet
 MD-2250  O-ring Intracerebral Cuide Cannula and Stylet 
 MD-2251  Omega-ring, Intracerebral Guide Cannula and Stylet



Cannula: Inert, biocompatible plastic


10 mm. This length permits you to reach even the deepest rat brain target. The length is optimized so when a   "BR"  style microdialysis probe is inserted, only the probe membrane protrudes from the guide. Custom length guides available.

Stylet: Stainless Steel
Lock Mechanism                                                  MD-2250 - Rubber ring, snap lock
MD-2251 - Steel collar, manual lock
Head Diameter: 6.4mm
Shaft Outer Diameter:                       775µm

 If you want to implant multiple guide cannulae closer than this guide's 6.4 mm OD permits, see the BASi® MBR style probes and guides.