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Microelectrode Recording

Using the FHC micro-drive

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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

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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

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FHC Assembly

• Remove alignment adapter

• Insert Center positioner

• Attach drive base• Attach micro-drive

Note: be sure drive is set to starting depth

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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

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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

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Microelectrode Recording

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Parallel Tracts

• Retract drive to starting point

• Remove cannula & re-insert through offset

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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

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Possible Tracks

Center Positioner

3mm offset at “B”3mm

offset at “G”

Center Positioner

at 45°

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Lead Placement

• Set drive to desired target depth

• Remove microelectrode and spacer cannula

• Attach lead holder

• Insert lead - depth stop at 347mm