B.Braun VenaTech LP Manual Del Usuario página 8

B) Puncture of the vein
1. Prepare the patient for access from the selected approach.
2. Puncture the vein using the Seldinger technique (or perform a surgical cut-
down of the vein). Confirm venous reflux into the syringe.
3. Advance a guidewire (0,89 mm — 0.035 in.) and then remove the Seldinger
needle.
C) Control cavogram, marking the filter implant site
1. Create a small incision with a scalpel to facilitate the
passage of the introducer. Insert a 7F catheter introducer
over the guidewire. Perform a cavogram using the 7F
catheter introducer or a catheter of your choice.
Caution : If ilio-caval clot is present, extreme care
must be exercised to avoid dislodging the clot.
2. Locate the renal veins and select the location for
filter placement. Mark the planned position of the top
of the filter cone by placing a metallic marker (e.g. a
hemostat) horizontally across the abdomen.
Note : Choice of the site for filter deployment :
When possible, it is preferable to place the filter just
below the renal veins. A security margin of 0.5 cm
should be left from the level of the lowest renal vein to
the top of the filter.
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