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Indications for the use of the Amplatzer vascular ... - ConsultiMedici.it

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710 Radiol med (2008) 113:707–718<br />

a<br />

b<br />

c<br />

Fig. 2a-c Aortoiliac aneurysm. a Preprocedural computed tomography (CT) angiography (volume-rendered<br />

reconstruction): aortoiliac aneurysm involving <strong>the</strong> origin <strong>of</strong> both internal iliac<br />

arteries and small aneurysm <strong>of</strong> <strong>the</strong> left internal iliac artery. b Angiography per<strong>for</strong>med after deployment<br />

<strong>of</strong> a customised bifurcated stent-graft w<strong>it</strong>h a branch preserving <strong>the</strong> patency <strong>of</strong> <strong>the</strong><br />

right internal iliac artery (black arrow); aneurysm <strong>of</strong> <strong>the</strong> left internal iliac artery is excluded<br />

w<strong>it</strong>h endo<strong>vascular</strong> ligation w<strong>it</strong>h <strong>Amplatzer</strong> <strong>vascular</strong> plug (AVP) in <strong>the</strong> feeding artery (black<br />

asterisk) and coils in <strong>the</strong> draining tract (wh<strong>it</strong>e arrow). c CT angiography per<strong>for</strong>med 6 months<br />

after <strong>the</strong> procedure (maximum intens<strong>it</strong>y projection reconstruction): complete exclusion <strong>of</strong> <strong>the</strong><br />

aneurysm, patency <strong>of</strong> <strong>the</strong> stent-graft branch <strong>of</strong> <strong>the</strong> right internal iliac artery (black arrow) and<br />

exclusion <strong>of</strong> <strong>the</strong> left internal iliac artery aneurysm w<strong>it</strong>h AVP (asterisk) and coils (wh<strong>it</strong>e arrow).<br />

Fig. 2a-c Aneurisma aorto-iliaco. a Angio-TC pre-procedura (ricostruzione VR): aneurisma<br />

aorto-iliaco con coinvolgimento dell’emergenza delle arterie ipogastriche e piccolo aneurisma<br />

dell’arteria ipogastrica sinistra. b Angiografia espletata dopo posizionamento di endoprotesi<br />

bi<strong>for</strong>cata “custom-made” con braccietto protesico che preserva la pervietà dell’arteria ipogastrica<br />

destra (freccia nera); l’aneurisma dell’arteria ipogastrica sinistra è stato escluso<br />

mediante “legatura endovascolare” con VPA a monte (asterisco nero) e spirali metalliche a<br />

valle (freccia bianca). c Follow-up con angio-TC esegu<strong>it</strong>a 6 mesi dopo la procedura (ricostruzione<br />

MIP): completa esclusione dell’aneurisma con pervietà dell’arteria ipogastrica destra<br />

dove è riconoscibile braccietto protesico (freccia nera); esclusione anche dell’aneurisma<br />

dell’arteria ipogastrica sinistra con VPA (asterisco) e spirali metaliche (freccia bianca).<br />

<strong>it</strong>s typical plug shape. The AVP is 7 mm or 8 mm long, and<br />

<strong>it</strong>s elongation is inversely proportional to <strong>the</strong> vessel diameter.<br />

In vessels w<strong>it</strong>h a diameter less than 50% that <strong>of</strong> <strong>the</strong> cylinder,<br />

<strong>the</strong> device can reach more than 1 cm in length.<br />

In 10/12 cases, we <strong>use</strong>d percutaneous transfemoral access,<br />

whereas in 2/12 cases, requiring occlusion <strong>of</strong> <strong>the</strong> subclavian<br />

artery, percutaneous access was transhumeral. The<br />

target vessel was first ca<strong>the</strong>terised selectively w<strong>it</strong>h an appropriately<br />

shaped 5-Fr ca<strong>the</strong>ter (Cordis) and 0.035”<br />

guidewire (Glidewire, Terumo, Tokyo, Japan) (Fig. 3a-c).<br />

Then, w<strong>it</strong>h <strong>the</strong> aid <strong>of</strong> a 0.035” stiff guidewire (Amplatz,<br />

Boston Scientific, Ratingen, Germany), we advanced <strong>the</strong><br />

guiding ca<strong>the</strong>ter (Envoy, Cordis, Miami, FI, USA). In two<br />

cases <strong>of</strong> aortoiliac aneurysm, <strong>the</strong> internal iliac artery was<br />

ca<strong>the</strong>terised w<strong>it</strong>h <strong>the</strong> crossover technique, whereas in <strong>the</strong> remaining<br />

cases, <strong>the</strong> ostium <strong>of</strong> <strong>the</strong> internal iliac artery was<br />

ca<strong>the</strong>terised through an ipsilateral access owing to more<br />

favourable anatomy. Once <strong>the</strong> guiding ca<strong>the</strong>ter was close to<br />

dalla elastic<strong>it</strong>à del N<strong>it</strong>inol che permette l’espansione sino al<br />

raggiungimento del calibro vaso; successivamente il dispos<strong>it</strong>ivo<br />

si allunga conferendo la caratteristica morfologia “a<br />

tappo”. Il VAP è lungo 7 o 8 mm e l’allungamento è inversamente<br />

proporzionale al calibro del vaso; con vasi di calibro<br />

inferiore al 50% si può allungare più di 1 cm.<br />

In 10/12 casi l’approccio percutaneo è stato effettuato<br />

per via trans-femorale; in 2/12 casi, per l’occlusione<br />

dell’arteria succlavia, è stato utilizzato l’approccio transomerale.<br />

Il vaso da occludere è stato dapprima cateterizzato<br />

selettivamente mediante catetere da 5 F (Cordis, Miami,<br />

USA) di morfologia appropriata e guida 0,035” (Glidewire,<br />

Terumo, Tokyo, Giappone) (Fig. 3a-c); successivamente<br />

con l’ausilio di guida rigida 0,035” (Amplatz, Boston Scientific,<br />

Ratingen, Germania) viene avanzato il catetere guida<br />

(Envoy, Cordis, Miami, Fl, USA); in 2 casi di aneurisma<br />

aorto-iliaco, l’arteria ipogastrica è stata cateterizzata con<br />

tecnica “cross-over”, mentre nei rimanenti casi l’ostio

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