Evaluate electrical performance of the lead
Verify the electrical performance of the lead
before
attaching the lead to the pulse generator and
after
allowing sufficient time
for the effect of local tissue trauma to subside. If the measurements do not conform to the recommended values listed in
Table 1, reposition and reaffix the electrode using the positioning technique discussed previously.
Table 1. Recommended threshold and sensing measurements
a
Atrial data
Ventricular data
Voltage threshold
b
≤
1.5 V
≤
1.0 V
Current threshold
b
≤
1.5 mA
≤
1.5 mA
Intrinsic amplitude
≥
2.0 mV
≥
5.0 mV
Impedance
450-1800
Ω
450-1800
Ω
Source: FLEXTEND Instructions For Use (355229).
a
Values measured approximat y 10 minutes after fixation.
el
b
Pulse width setting at 0.5 ms.
NOTES:
•
Electrical measurements immediately post-fixation may deviate from recommendations. Values may be
dependant on patient specific factors such as tissue condition, electrolyte balance and drug interactions.
•
Over-rotation of terminal pin may increase local tissue trauma and cause temporarily high thresholds.
Secure the lead
After successful lead positioning and fixation, secure the lead to the vein using the suture sleeves provided (Figure 3). Suture
sleeve tie-down techniques can vary with the lead insertion technique used.
Figure 3. Suture sleeve
December 13, 2007
©2007 Boston Scientific Corporation or its affiliates. All rights reserved.
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