Medtronic Valiant Navion Gebrauchsanweisung Seite 27

3. Remove the front grip from the screw gear and discard. Move the inner strain relief tube away from the screw gear to
improve access to the graft cover tube.
4. Activate the trigger and move the slider handle to the back of the screw gear. This will allow greater screw gear separation
and better access to the graft cover tube.
Note: Since the graft cover is severed, the slider can be retracted without further deploying the stent graft.
5. Separate the 2 screw gear halves in order to identify where the graft cover is severed.
Note: Stabilize the delivery system screw gear. Ensure that the screw gear is not inadvertently pushed or pulled during
manual deployment. Moving the screw gear could inadvertently cause the stent graft to move from its partially deployed
location.
6. Grip the graft cover manually or with hemostats and retract until the stent graft is fully deployed (Figure 15).
7. Continue to hold the screw gear stationary and deploy the tip capture release mechanism per Section 9.8 (Deploying the tip
capture mechanism).
Caution: Use fluoroscopy to carefully monitor any delivery system movement and the retrieval of the delivery system's
tapered tip. The use of fluoroscopy will ensure that the delivery system does not inadvertently cause the stent graft to move
from its deployed location.
8. Grip the screw gear and withdraw the system from the patient.
10.2. Nonrelease of tip capture mechanism
If nonrelease of the tip capture mechanism occurs, a rear grip handle disassembly technique may permit the successful
deployment of the proximal stent.
1. Ensure the delivery system remains stationary and continue to monitor stent graft position.
2. Slice the rear blue grip along one of the grooves and remove from the back end (Figure 16).
Figure 14. Slicing the front grip
Figure 15. Gripping the graft cover
Instructions for Use English 25