Understanding The Charge Density Warnings - Boston Scientific Vercise DBS Programming Manual

Understanding the Charge Density Warnings

The Clinician Programmer software provides several warnings when the charge density
at a contact may exceed 30 microcoulombs/cm
evidence of tissue damage above this level. The graph below displays the recommended
maximum charge density of 30 microCoulombs/cm
amplitude (mA) and pulse width (µs) for Boston Scientific DBS Leads.
The Clinician Programmer software provides a warning when the charge density at a
contact is about to be programmed to exceed 30 microcoulombs/cm
phase. However, the Clinician Programmer allows the stimulation to continue above this
level. The warning reads:
"CAUTION: Charge density limit reached. Continue programming at your
discretion."
Note: A charge density limit warning will be displayed on the Programming screen
while any area is above the charge density limit and will clear when all areas are
below it.
A warning is also displayed when the amplitude range of a program exceeds charge
density limits. The warning reads:
"Caution: With present settings, the patient could exceed the charge density
limit with the remote control. Continue programming at your discretion."
Another warning is displayed when a program that is capable of exceeding the charge
density limit is saved to a program slot in the patient's Remote Control. The warning
reads:
"Caution: Charge density limit may be reached with the current Max mA set.
Do you want to continue?"
per stimulation phase, as there is
2
for different combinations of current
2
30 uC/cm
2
Pulsewidths (usec)
Programming the Patient
per stimulation
2
Vercise™ DBS Programming Manual
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