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Planning and Sizing

(includes Spiral-Z

™ AAA Iliac Leg

and Z-Trak

®

Introduction System)

Planning and Sizing

Obtain the recommended CT and angiography.

Follow these five recommended steps:

1. Select the side for main body introduction and

fixation sites.

1. Obtain and note anatomical measurements

on the worksheet.

1. Select the main body.
2. Select the contralateral iliac leg.
3. Select the ipsilateral iliac leg.

Diameter Measurements

D1, D2, D3: Proximal neck

and common iliac diameters

from axial CT images should be

measured from outer wall to

outer wall, using

shortest axis.

outer wall to outer wall

Diameter Measurements

EI: External iliac diameters from

axial CT images should be

measured from inner wall to

inner wall to assure delivery

system access. Vessel should be

compatible with delivery

systems that are the profile of a

16-22 Fr introducer sheath.

inner wall to inner wall

Diameter Oversizing

Undersizing

Oversizing

Overlap

Contralateral

22 mm – 30 mm

Note: Maximum contralateral

overlap denoted by radiopaque

marker band.

Ipsilateral

• 22 mm – 30 mm (39 mm

lengths)

• 22 mm – 55 mm (other lengths)

Zenith

®

Planning and Sizing Worksheet

Step 1

Select the side for main body introduction and fixation

sites.

Generally, place the main body through the side that

has the best access vessel.

Factors to consider (as per intended use in IFU):

• (^) Iliac tortuosity
• (^) Vessel diameter (EI)
• (^) Angulation of a distal neck
• (^) Aneurysmal sac orientation
• (^) Mural thrombus within the aneurysm
• (^) Iliofemoral disease (e.g., stenosis, calcification)
• (^) Iliac length (short iliac contralateral)
• (^) Iliac aneurysm (ipsilateral)

Step 2

Obtain anatomical measurements.

D1: Largest aortic neck diameter throughout 15 mm neck

length

D2: Largest iliac diameter throughout contralateral distal

fixation site

D3: Largest iliac diameter throughout ipsilateral distal

fixation site

L1: Lowest renal artery to aortic bifurcation, including

lateral deviation

L2: Lowest renal artery to contralateral distal fixation site,

including lateral deviation

L3: Lowest renal artery to ipsilateral distal fixation site,

including lateral deviation

Zenith Worksheet

Zenith Worksheet

Step 4

Select contralateral iliac leg.

From D2, select graft diameter. (Table includes

oversizing.)

L1 − cl length = contralateral working length.

Using contralateral working length, select graft length.

Consider stent overlap and a secure fixation site.

If choice of graft diameter or graft length is affected by

other considerations, adjust accordingly.

Step 5

Select ipsilateral iliac leg.

From D3, select graft diameter. (Table includes

oversizing.)

L3 − il length = ipsilateral working length.

Using ipsilateral working length, select graft length.

Consider stent overlap and a secure fixation site.

If choice of graft diameter or graft length is affected by

other considerations, adjust accordingly.

Zenith Worksheet