Boston Scientific VERCISE DBS, Руководство по программированию, Страница: 39 / 1712

Vercise™ DBS Programming Manual
91053785-17 33 of 1705
Programming the Patient
en
Understanding the Charge Density Warnings
The Clinician Programmer software provides several warnings when the charge density
at a contact may exceed 30 microcoulombs/cm
2
per stimulation phase, as there is
evidence of tissue damage above this level. The graph below displays the recommended
maximum charge density of 30 microCoulombs/cm
2
for different combinations of current
amplitude (mA) and pulse width (µs) for Boston Scientific DBS Leads.
30 uC/cm
2
Current Amplitude
(mA)
Pulsewidths (usec)
The Clinician Programmer software provides a warning when the charge density at a
contact is about to be programmed to exceed 30 microcoulombs/cm
2
per stimulation
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?”