Brain "BR" Intracerebral Guide Cannulae

These guide cannulae 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.


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

  1. One uses a rubber O-ring that lightly snaps into the notch in the probe or stylete 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 stylete. When the omega ring is turned further, closing the window, the probe/stylete is locked securely in place. Removal is equally simple.
Intracerebral Guide Cannula and Stylet
 MD-2250  O-ring, Intracerebral Guide Cannula and Stylet, 6/box
 MD-2251  Omega-ring, Intracerebral Guide Cannula and Stylet, 6/box



 Cannula:  Inert, biocompatible plastic
 Length:  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 out. 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

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