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NOTE: Radiopaque cannula on each stent between the renal arteries and the
contralateral limb align with the contralateral limb radiopaque marker.
8. Repeat the angiogram to verify the four gold radiopaque markers are
2 mm or more below the most inferior renal orifice.
9. Ensure the Captor Hemostatic Valve on the Flexor introducer sheath is
turned to the open position. (Fig. 10)
10. Use the gripper to stabilize the gray positioner (the shaft of the delivery
system) while withdrawing the sheath. Deploy the first two covered
stents by withdrawing the sheath while monitoring device location. (Fig.
18)
11. Without moving the table, decrease magnification to check position of
the contralateral limb radiopaque marker and location of renal arteries.
Proceed with deployment until the contralateral limb is fully deployed.
(Fig. 11) Stop withdrawing sheath.
NOTE: Verify contralateral limb is at least 5 mm above the aortic bifurcation
and in desired location for cannulation.
11.1.6 Contralateral Iliac Wire Guide Placement
1. Manipulate catheter and wire guide through open end of contralateral
limb into body of the graft. Advance the wire guide until it curves inside
the body of the graft. AP and oblique fluoroscopic views can aid in
verification of device cannulation.
2. After cannulation, advance the angiographic catheter over the wire
into the body of the endovascular graft. Remove wire and perform
angiography to confirm position. Advance wire guide until it curves
inside the body of the graft. (Fig. 12) Remove angiographic catheter.
11.1.7 Main Body Proximal (Top) Deployment
1. Perform angiography through an angiographic catheter to verify position
of the endovascular graft with respect to the renal arteries. If necessary,
carefully reposition the covered portion of the endovascular graft with
respect to the renal arteries. (Repositioning can only take place over a
small range of distance at this stage.)
NOTE: Ensure patency of renal arteries by confirming that the proximal graft
markers are 2 mm or more below the lowest patent renal artery.
CAUTION: During proximal trigger-wire removal, top cap advancement,
and subsequent suprarenal stent deployment, verify that the position of
the main body wire guide extends just distal to the aortic arch and that
support of the system is maximized.
2. Remove the safety lock from the top stent trigger-wire release
mechanism. Under fluoroscopy, withdraw and remove the trigger-wire
by sliding the top stent trigger-wire release mechanism off the handle
and then remove via its slot over the inner cannula. (Fig. 13)
If resistance is felt or system bowing is noticed, the trigger-wire is under
tension. Excessive force may cause the graft position to be altered. If
excessive resistance or delivery system movement is noted, stop and assess
the situation. If unable to remove the top stent trigger-wire release
mechanism from the top cap, perform the following steps under fluoroscopy:
a. Remove tension on the trigger-wire by loosening the pin vise and
slightly pulling the inner cannula to move the top cap down over the
suprarenal stent. Avoid compressing the Zenith Flex main body.
b. Retighten the pin vise.
c. Remove the top stent trigger-wire release mechanism.
d. Continue with Step 3 in Section 11.1.7, Main Body Proximal (Top)
Deployment.
NOTE: If still unable to remove the top stent trigger-wire release mechanism
from the top cap, see Section 14.1, Trigger-Wire Release Troubleshooting.
3. Loosen the pin vise. (Fig. 14) Control the position of the graft by
stabilizing the gray positioner of the introducer.
4. Deploy the suprarenal stent by advancing the top cap inner cannula 1
to 2 mm at a time while controlling the position of the main body until
the top stent is fully deployed. (Figs. 15 and 16) Advance the top cap
cannula an additional 1 to 2 cm and then retighten the pin vise to avoid
contact with the deployed suprarenal stent.
NOTE: If unable to fully deploy suprarenal stent by advancing the top
cap inner cannula, see Section 14.2, Suprarenal Stent Deployment
Troubleshooting.
NOTE: Once the barbed suprarenal stent has been deployed, futher attempts
to reposition the graft are not recommended.
WARNING: The Zenith Flex AAA Endovascular Graft incorporates a
suprarenal stent with fixation barbs. Exercise extreme caution when
manipulating interventional devices in the region of the suprarenal stent.
5. Advance the contralateral wire guide into the thoracic aorta.
11.1.8 Contralateral Iliac Leg Placement and Deployment
CAUTION: Verify that the predetermined contralateral iliac leg is selected
for insertion on the contralateral side of the patient before implantation.
1. Position the image intensifier to show both the contralateral internal iliac
artery and contralateral common iliac artery.
2. Prior to the introduction of the contralateral iliac leg delivery system,
inject contrast through the contralateral femoral sheath to locate the
contralateral internal iliac artery.
3. Introduce the contralateral iliac leg delivery system into the artery.
Advance slowly until the iliac leg graft overlaps at least one full iliac leg
stent (i.e., proximal stent of iliac leg graft) inside the contralateral limb of
the main body. (Fig. 17) If there is any tendency for the main body graft
to move during this maneuver, hold it in position by stabilizing the gray
positioner on the ipsilateral side.
NOTE: If difficulty is encountered advancing the iliac leg delivery system,
exchange to a more supportive wire guide. In tortuous vessels the anatomy
may alter significantly with the introduction of the rigid wires and sheath
systems.
4. Confirm position of distal end of the iliac leg graft. Reposition the
iliac leg graft if necessary to ensure both internal iliac patency and a
minimum overlap of one full iliac leg stent (i.e., proximal stent of iliac leg
graft, maximum overlap of 1.5 stents) within the main body endovascular
graft.
NOTE: Ensure Captor Hemostatic Valve on the iliac leg introducer sheath is
turned to the open position. (Fig. 10)
5. To deploy, hold the iliac leg graft in position with the gripper on the gray
positioner while withdrawing the sheath. (Figs. 18 and 19) Ensure one
stent overlap is maintained.
6. Stop withdrawing the sheath as soon as the distal end of the iliac leg
graft is released.
7. Under fluoroscopy and after verification of iliac leg graft position,
loosen pin vise and retract inner cannula to dock tapered dilator to gray
positioner. Tighten pin vise. Maintain sheath position while withdrawing
gray positioner with secured inner cannula.
8. Close the Captor Hemostatic Valve on the iliac leg introducer sheath by
turning it in a clockwise direction until it stops. (Fig. 26)
9. Re-check the position of the wire guide.
11.1.9 Main Body Distal (Bottom) Deployment
1. Return to the ipsilateral side.
2. Fully deploy the ipsilateral limb of the main body by withdrawing the
sheath until the most distal stent has expanded. (Figs. 18 and 20) Stop
withdrawing sheath.
NOTE: The distal stent is still secured by the trigger-wire.
3. Remove the safety lock from the ipsilateral limb trigger-wire release
mechanism. Withdraw and remove the trigger-wire by sliding the
ipsilateral limb trigger-wire release mechanism off the handle and then
remove via its slot over the inner cannula. (Fig. 21)
11.1.10 Docking of Top Cap
1. Loosen the pin vise. (Fig. 22)
2. Secure sheath and inner cannula to avoid any movement of these
components.
3. Advance the gray positioner over the inner cannula until it docks with
the top cap. (Figs. 23, 24 and 25)
NOTE: If resistance occurs, slightly rotate gray positioner and continue to
gently advance.
4. Retighten the pin vise and withdraw the entire top cap and gray
positioner through the graft and through the sheath by pulling on the
inner cannula. Leave the sheath and wire guide in place.
NOTE: Maintain position of sheath and wire guide.
5. Close the Captor Hemostatic Valve on the main body introducer sheath
by turning it in a clockwise direction until it stops. (Fig. 26)
11.1.11 Ipsilateral Iliac Leg Placement and Deployment
NOTE: Ensure the Captor Hemostatic Valve on the main body introducer
sheath is turned to the open position. (Fig. 27)
1. Utilize the main body graft wire and sheath assembly to introduce the
ipsilateral iliac leg graft. Advance dilator and sheath assembly into the
main body sheath.
NOTE: In tortuous vessels, the position of the internal iliac arteries may alter
significantly with the introduction of the rigid wires and sheath systems.
2. Advance slowly until the ipsilateral iliac leg graft overlaps a minimum
of one full iliac leg stent (i.e., proximal stent of iliac leg graft) inside the
ipsilateral limb of the main body. (Fig. 28)
NOTE: If an overlap of greater than three iliac leg stents is required (greater
than two iliac leg stents for 37, 39, 54, and 56 mm leg lengths), it may be
necessary to consider use of a leg extension in the bifurcation area of the
opposite side.
3. Confirm position of distal end of the iliac leg graft. Reposition the iliac
leg graft if necessary to ensure internal iliac patency.
NOTE: Ensure the Captor Hemostatic Valve on the iliac leg introducer sheath
is turned to the open position. (Fig. 10)
4. To deploy, stabilize the iliac leg graft with the gripper on the gray
positioner while withdrawing the iliac leg sheath. (Figs. 29 and 30) If
necessary, withdraw the main body sheath.
5. Under fluoroscopy and after verification of iliac leg graft position,
loosen pin vise, and retract inner cannula to dock tapered dilator to gray
positioner. Tighten pin vise. Maintain main body sheath position while
withdrawing iliac leg sheath and gray positioner with secured inner
cannula.
6. Close the Captor Hemostatic Valve on the main body introducer sheath
by turning it in a clockwise direction until it stops.
7. Re-check the position of the wire guides. Leave sheath and wire guides
in place.
11.1.12 Molding Balloon Insertion
1. Prepare molding balloon as follows:
• Flush wire lumen with heparinized saline.
• Remove all air from balloon.
2. In preparation for the insertion of the molding balloon, open the Captor
Hemostatic Valve by turning counter-clockwise.
3. Advance the molding balloon over the wire guide and through the
Captor Hemostatic Valve of the main body introduction system to the
level of the renal arteries. Maintain proper sheath position.
4. Tighten the Captor Hemostatic Valve around the molding balloon with
gentle pressure by turning it clockwise.
CAUTION: Do not inflate balloon in vessel outside of graft.
5. Expand the molding balloon with diluted contrast media (as directed by
the manufacturer) in the area of the most proximal covered stent and the
infrarenal neck, starting proximally and working in the distal direction.
(Fig. 31)
CAUTION: Confirm complete deflation of balloon prior to repositioning.
CAUTION: Captor Hemostatic Valve must be open prior to repositioning
of molding balloon.
6. Withdraw the molding balloon to the ipsilateral limb overlap and
expand.
CAUTION: Captor Hemostatic Valve must be open prior to repositioning
of molding balloon.
7. Withdraw the molding balloon to the ipsilateral distal fixation site and
expand.
CAUTION: Do not inflate balloon in vessel outside of graft.
CAUTION: Captor Hemostatic Valve must be open prior to repositioning
of molding balloon.
8. Deflate and remove molding balloon. Transfer the molding balloon
onto the contralateral wire guide and into the contralateral iliac leg
introduction system. Advance molding balloon to the contralateral limb
overlap and expand.
CAUTION: Confirm complete deflation of balloon prior to repositioning.
CAUTION: Captor Hemostatic Valve must be open prior to repositioning
of molding balloon.
9. Withdraw the molding balloon to the contralateral iliac leg/vessel distal
fixation and expand. (Fig. 31)
CAUTION: Do not inflate balloon in vessel outside of graft.
10. Remove molding ballon and replace it with an angiographic catheter to
perform completion angiograms.
11. Remove or replace all stiff wire guides to allow iliac arteries to resume
their natural position.
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