Specifications

7 x 9 inches (178 mm x 229 mm)
Medtronic Confidential
Refer to the “Reference man.” category in doc#163256 for Printing
Instructions.
196407001 Rev A
NOTE: A message stating that the test results are invalid may indicate
that the patient’s thresholds are too high to be used in the computation
of a strength-duration curve or that product of the threshold amplitude
and pulse width values for both tests (Part B and Part C) are the same
(they must be different for computation of the strength-duration curve).
If the latter is true, running the test again using a lower amplitude test
value should result in a strength-duration curve.
D. Viewing the Test Results and Programming Permanent
Values for Amplitude and Pulse Width
Selecting the button in Step 3 displays the threshold test results in the form
of a strength-duration curve computed by the programmer. Options on this
screen, as shown in the example below, let you select a desired safety
margin and directly program permanent settings for amplitude and pulse
width.
About the Strength-Duration Curve — The curve formed by the edge of
the shaded area is the computed curve of the patient’s threshold based on
the two measured threshold values (shown as small circles on the curve).
Any combination of amplitude and pulse width values that fall above this
curve will result in capture. Conversely, any values that fall below the
curve, i.e., within the shaded area, will not result in capture.
The graphic symbols used in this graphic display are as follows:
z Marks the results of the amplitude and pulse width tests.
X
Marks the present permanent amplitude and pulse width settings.
+
++
+
Marks the selected pending amplitude and pulse width values.
Strength-Duration
Threshold Test
Results Screen
Curves indicating the
2X and 3X safety
margins.
Patient’s computed
threshold curve.
7-8 Using the Programmer