İliokaval derin ven trombozu

Özet

İliokaval tromboz, alt ekstremite venöz dönüşünü ortak iliak venler ve vena cava inferior düzeyinde kesintiye uğratabilen proksimal derin ven trombozudur. BT ve BT venografi, trombüs yükünün yayılımını göstermeye ve eşlik eden anatomik nedenleri değerlendirmeye yardımcı olabilir. Geniş lomber, azygos ve paravertebral kollateraller kronik venöz obstrüksiyonu düşündürebilir; bu bulgular akut trombozla birlikte de görülebilir. Trombüsün renal venlere uzanımı ve iliokaval yayılımı, hastalığın kapsamını belirlemek için görüntülemede değerlendirilmelidir.

Faz ve pencere

Gecikmiş tanısal

BT ve BT venografide iliak venler ile vena cava inferior boyunca trombüsün yayılımı değerlendirilir; eşlik eden kollateral venöz dolaşım da görülebilir.

Önerilen pencereler: Batın (G 400 / M 50), Yumuşak doku (G 400 / M 40), Anjiyo (G 600 / M 150).

BT bulguları

• Ortak iliak ven ve vena cava inferior lümeninde devamlı izlenen kontrastla çevrili trombüs
• Tromboze bir vende BT'de lümen içi dolum defekti görülebilir.
• Trombüsün renal ven ostiumlarına veya ana femoral venlere doğru uzanım göstermesi
• Kronik iliokaval obstrüksiyonda lomber, azygos ve paravertebral kollateral venler belirginleşebilir.
• Presakral, internal iliak, lomber ve abdominal duvar venlerinde belirginleşmiş kollateral ağ
• İliak venöz çıkış yolunu daraltan pelvik kitle veya komşu lenf nodu paketi

Normalde

BT, vena cava inferiorun ve renal venlerin anatomisini değerlendirmeye ve trombüsün yayılımını belirlemeye yardımcı olabilir. Kronik venöz obstrüksiyonda lomber, azygos ve paravertebral kollateral venler belirginleşebilir. BT, trombüsün IVC veya konjenital anomalilere uzanımı hakkında bilgi sağlar; kavagrafi ise iliokaval trombozun kriter standart tanı yöntemidir.

Ayırıcı tanı

IVC'deki yalancı lezyonlar trombüsü taklit edebilir; opasite düzensizliği trombüs olarak yorumlanmadan önce bu olasılık da değerlendirilmelidir.

Bland tromboz ile tümör trombüsü ayırımı önemlidir; tümör trombüsü primer maligniteyle bağlantılıdır ve radyolojik karakterizasyonu çok parametrik görüntüleme araçlarıyla yapılabilir.

İzole iliak ven basısında ven dıştan komprese olabilir; basının derecesi venografi ve intravasküler ultrasonografiyle en iyi belirlenir.

Kronik posttrombotik daralmada, ven içinde organze olmuş trombus ve belirgin venöz kollateraller izlenir; bu bulgular akut genişlemiş ven görünümünden ayırt edilebilir.

Tuzaklar

• IVC'de trombüsün varlığı ve yayılımı değerlendirilirken BT bulgularını dikkatle inceleyin; BT, trombüs yükünün kapsamını belirlemeye yardımcı olabilir.
• Genişlemiş lomber, azygos ve paravertebral kollateral venler, kronik venöz obstrüksiyonun varlığını gösterir ve bu bulgular akut tromboz ile birlikte değerlendirilmelidir.
• Tek taraflı iliak ven basısı yaygın iliokaval trombozu kanıtlamaz; lümen içi materyali ve gerçek trombüs uzanımını ayrı ayrı tarif edin.

Kendini dene

1. İliokaval tromboz şüphesinde BT ve MR görüntülemenin trombüs yükü açısından temel katkısı nedir?

   • Trombüsün yayılımını tanımlamaya yardımcı olmak
   • Trombüsün histolojik türünü kesin olarak belirlemek
   • Venöz basıncı doğrudan ölçmek
   • Trombüsün yaşını kesin olarak saptamak
   Cevabı göster

   Trombüsün yayılımını tanımlamaya yardımcı olmak. BT ve MR, trombüs yükünün yayılımını tanımlamaya ve girişim planlamasına yardımcı olabilir; bu kaynak, histolojik türün, venöz basıncın veya trombüs yaşının kesin belirlenmesini desteklemiyor.

2. Bir hastada bilateral iliak venler ve infrarenal vena cava inferiorda trombozla birlikte belirgin lomber, azygos ve paravertebral kollateral damar ağları izleniyor. Bu bulgu en çok aşağıdakilerden hangisini düşündürür?

   • Kronik venöz obstrüksiyon üzerine gelişmiş akut trombozis
   • İzole akut iliak ven tıkanıklığı
   • Geçici kontrast karışım artefaktı
   • Postoperatif venoz spazm
   Cevabı göster

   Kronik venöz obstrüksiyon üzerine gelişmiş akut trombozis. Geniş lomber, azygos ve paravertebral kollateraller, kronik venöz obstrüksiyon üzerine akut tromboz gelişmiş olabileceğini düşündürür.

İlgili konular

• Vena cava inferior trombozu
• İliak ven trombozu
• Alt ekstremite derin ven trombozu (BT venografide)

Kaynaklar

Bu sayfadaki 32 cümle ve 2 quiz sorusu aşağıdaki kaynaklardan alıntılarla tek tek karşılaştırıldı; 19 cümle bu karşılaştırmada düzeltildi (2026-10-09).

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