BY IG N
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Microelectrode Recording
• Calculate the micro-drive starting point• Assemble the FHC micro-drive• Insert the cannulae• Insert the microelectrode• Additional tracks:
– Perform a parallel track
– Using the offset positioner
• Place the DBS lead
BY IG N
guiding the way
Starting Point Calculation
• Depth to target is from alignment adapter
• Offset calculates for FHC stackup
• Allowable targeting range is 150-180mm
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FHC Calculation
Stealth Depth
FHC Offset
Target Depth
Approach Height
Start Position
X - 135 mm = Y - Z = Start
example 160 - 135 mm = 25 mm - 15 mm = 10 mm
BY IG N
guiding the way
FHC Assembly
• Remove alignment adapter
• Insert Center positioner
• Attach drive base• Attach micro-drive
Note: be sure drive is set to starting depth
BY IG N
guiding the way
Cannulae insertion
• Insert stylet through passing cannula
• Attach collet to passing cannula
• Pass cannula/collet combo into drive
• Remove Stylet• Insert microelectrode
cannulaNote: be sure drive is set to starting depth
BY IG N
guiding the way
Microelectrode insertion
• Retract microelectrode within sheath
• Pass microelectrode through cannula
• Advance electrode• Connect recording
system cables Note: be sure drive is set to starting depth
BY IG N
guiding the way
Parallel Tracts
• Retract drive to starting point
• Remove cannula & re-insert through offset
BY IG N
guiding the way
Offset Positioner
• Retract drive to starting point
• Remove cannula
• Remove drive and drive base
• Remove center positioner
• Choose direction for offset
• Insert offset positioner
• Re-assemble drive and cannula
BY IG N
guiding the way
Possible Tracks
Center Positioner
3mm offset at “B”3mm
offset at “G”
Center Positioner
at 45°