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Directions for Use
Materials recommended for use with the device
• The AMPLATZER™ 45° Delivery System or the AMPLATZER™ TorqVue™ 45° Delivery
System (both sold separately) is recommended for use with the AMPLATZER™ Septal
Occluder.
• 0.035-inch exchange-length J-tip guidewire
• AMPLATZER™ Sizing Balloon II
Preprocedure Care
It is recommended that at least 24 hours prior to the procedure that the patient receives aspirin
(81 mg or 325 mg) or an alternative antiplatelet/anticoagulant if the patient has an aspirin
intolerance.
Procedure
1. Prepare the patient for a standard transcatheter procedure. Maintain a recommended
activated clotting time (ACT) of greater than 200 seconds. Effective anticoagulation
therapy should be maintained during and after the procedure as determined by the
physician.
2. Puncture the femoral vein and perform a standard right-heart catheterization.
3. Perform an angiogram to demonstrate the atrial defect. Catheterize the left atrium using a
45º LAO position and cranial angulation of 35º–45º. Inject contrast medium into the right
upper lobe pulmonary vein.
Note: Occluder size and placement are based on the locations of the defects.
4. Use the J-tip guidewire to gain access to the left atrium.
5. Echo guidance: The procedure should be performed under echo guidance to allow for
comprehensive assessment of all rims (with specific emphasis on adequacy of the
anterior-superior rim) and cardiac structures to enable appropriate placement and
position of the ASD device, and to assess whether acute ASD closure has been achieved
without pathologic interference or impingement on important surrounding cardiac
structures. Use echocardiographic measurements and an AMPLATZER™ Sizing
Balloon II to determine the diameter of the defect. Refer to the instructions for use
included with the AMPLATZER™ Sizing Balloon II for more information.
Note: If balloon sizing is performed in addition to echocardiographic measurements, a
stop-flow technique should be used.
6. Insert a compliant balloon catheter over the guidewire into the left atrium and determine
the diameter of the defect.
- Under fluoroscopic and echocardiographic guidance, place the balloon catheter across
the defect and inflate the balloon with diluted contrast medium until the left-to-right
shunt ceases.
- Deflate the balloon until flow is visible, and then reinflate the balloon until the shunting
ceases.
WARNING: Do not inflate the balloon beyond the stop-flow point or beyond the balloon's
maximum inflation volume. Inflation beyond the stop-flow point may cause distention of
the defect (resulting in inaccurate sizing of the defect) and/or balloon damage.
Note: A waist in the balloon could appear without the cessation of flow. This would occur if
there is more than one ASD. Sizing should occur based on stop-flow, not the appearance
of a waist.
- Measure the defect using echocardiographic imaging, fluoroscopy, or by using the
AMPLATZER™ Sizing Plate.
7. Once the diameter of the defect is determined, select a device size equal to or 1 size
larger than the diameter of the defect. Refer to Table T1 on the foldout of the back cover.
WARNING: Do not select a device size that is more than 1.5 times the
echocardiographic-derived ASD diameter prior to balloon sizing.
8. Remove the balloon catheter and leave the guidewire in place.
100092311_ASD.book Page 11 Monday, January 6, 2014 11:00 AM