Boston Scientific WallFlex Mode D'emploi page 6

Caution: Do not push forward or pull backward on the hub
handle with the stent partially deployed. The hub handle
must be securely immobilized. Inadvertent movement of
the hub handle may cause misalignment of the stent and
possible intestinal wall damage.
Caution: The stent should deploy easily. Do not deploy the
stent if unusual force is required. To remove the device, see
the Caution in Step 12 below.
Caution: Do not reconstrain around tortuous anatomy as it
may cause damage to the device.
10. Assess stent position and reposition if desired. To reposition,
first fully reconstrain the stent by gently pushing the exterior
tube handle while holding the hub handle completely
immobile. When fully reconstrained, the delivery system can
be moved either proximally or distally and the deployment
process restarted. Repositioning can be repeated twice,
allowing a total of three deployment attempts.
Caution: A stent cannot be repositioned after the
Deployment Limit Marker Band has been passed.
11. To complete stent deployment immobilize the hub handle
with one hand, grasp the exterior tube handle with the
other hand, and gently slide the exterior tube handle
along the stainless steel tube towards the hub handle until
the stent is fully deployed. (See Figure D) As before, the
endoscopist should gently withdraw the exterior tube at
the same time and at the same rate to prevent inadvertent
stent advancement.
Figure D
Caution: If the stent can not be fully deployed or fully
reconstrained, the entire delivery system can be pulled
into the endoscope, using the working channel of the
endoscope to reconstrain the stent.
warning: this may cause damage to the working channel of
the endoscope. In addition, the stent could inadvertently be
forced off of the delivery system.
12. After the stent is correctly positioned and fully deployed,
the delivery system should be closed, by pushing the
exterior tube handle forward, and removed. The implanted
stent length should allow for adequate overlapping into the
non-obstructed anatomy to compensate for further tumor
progression and stent shortening. In the event the stent
does not adequately cover the stricture, a second stent
should be implanted providing adequate overlapping of the
initially placed stent.
Caution: Do not place stents end to end (without overlap)
as this may cause kinking. Do not use in combination with
stents from other manufacturers.
Caution: If the delivery system is not fully closed prior to
withdrawal, there is a possibility that the tip of the delivery
system will get caught in the stent.
Black (K) ∆E ≤5.0
6
Post-deployment
marker-band