Tüm vücut travma BT protokolü ve tarama sınırları

Özet

Yüksek enerjili mekanizma, çoklu yaralanma kuşkusu veya güvenilir fizik muayenenin mümkün olmadığı ağır travma hastasında tüm vücut BT, gözden kaçabilecek yaralanmaları aynı değerlendirmede haritalar. Beyin ve servikal omurga genellikle kontrastsız; gövde ise kurumsal protokole ve klinik soruya göre IV kontrastlı tek ya da çok fazlı incelenir. Tarama sınırlarının, kontrast zamanlamasının ve rekonstrüksiyonların kaydı bulguların doğru anatomik bağlama oturmasını sağlar. Görüntülenen alan dışındaki yaralanma veya artefakt altında saklı kanama atlanırsa hızlı tanı ve güvenli triyaj gecikebilir.

Okuma sırası

1. Scout ve kafa serisi sınırları. Scout görüntüsünde kafa tepesinden başlayıp son kafa kesitine kadar anatomik kapsamın kesintisiz olup olmadığını gösterin.
2. Serebral hemisferler. Kontrastsız kafa BT’sinde ekstraaksiyel kanama ve parankim dansitesini değerlendirirken aksiyel görüntülere ek olarak koronal reformasyonları da inceleyin.
3. Foramen magnum ve kafa tabanı. Kafa tabanı kesitinde kontrastlı gövde serisine geçişi ve beyin-kemik rekonstrüksiyonlarının kapsama devamını belirtin.
4. Artefakt ve tarama alanı. Son olarak görüntü alanına giren metal, hareket çizgileri veya kesilmiş ekstremiteyi bulun; bunların hangi anatomik değerlendirmeyi sınırladığını açıklayın.

Faz ve pencere

Kontrastsız tanısal

Kafa serisi kontrastsız alınır; akut intrakraniyal kan, kafa kırığı ve pnömosefali bu seride değerlendirilir.

Arteriyel

Klinik soru ve yerel protokol gerektiriyorsa boyun-gövde arteriyel edinimi damar yaralanması, aktif ekstravazasyon ve aort hasarı için kullanılır; tüm merkezlerde zorunlu ayrı faz değildir.

Portal tanısal

IV kontrastlı gövde serisinde solid organ parankim hasarı, hemoperitoneum ve birçok damar dışı yaralanma görünür; çekim kapsamı merkez protokolüne göre değişir.

Önerilen pencereler: Beyin (G 80 / M 40), Kemik (G 1800 / M 400), Yumuşak doku (G 400 / M 40), Anjiyo (G 600 / M 150), Akciğer (G 1500 / M -600), Mediasten (G 350 / M 50), Batın (G 400 / M 50).

BT bulguları

• Tarama sınırı — kafa tepesi, servikal omurga, göğüs, abdomen ve pelvisin gerçekten kapsanıp kapsanmadığını scout görüntüsü ve seri son kesitlerinden kontrol et.
• Başlangıçta kontrastsız kafa serisi alınır; bu seri akut intrakraniyal kanama ve kemik yaralanmalarının değerlendirmesi için kullanılır.
• Kontrast bolusu ve faz zamanlaması — Damar lümenindeki kontrastlanma düzeyini, gövde çekiminin arteriyel veya portal faz zamanlamasını ve olası tekrar çekimleri değerlendir.
• Hareket ve metal artefaktı — kafatası tabanı, omuz kuşağı ve pelviste çizgilenmenin kanama ya da kırık hattını örtüp örtmediğini belirle.
• Reformat uyumu — aksiyel kesitleri koronal-sagittal yumuşak doku ve kemik rekonstrüksiyonlarıyla eşleştir; ince kemik yaralanmasını yalnız kalın yumuşak doku serisinde arama.
• Görüntü alanına giren ekstremite ve yabancı cisim — kesilmiş anatomiyi, mermi/metal parçalarını ve bunların oluşturduğu yerel değerlendirme kısıtını raporda belirt.

Normalde

Normal incelemede kafa kemikleri kesintisiz, beyin parankimi simetrik ve ekstraaksiyel aralıklar belirgin kitle etkisi olmadan izlenir; gövdede damar ve organlar bekendiği şekilde kontrastlanır. Kıyasın ilk noktası yalnız organ görünümü değil, scouttan son kesite kadar tüm planlanan anatomik kapsamın tamamlanması ve faza uygun opaklaşmanın bulunmasıdır. Hareket veya metal çizgileri normal anatomiyi bozuyorsa bu alanı tanısal güven düzeyinden ayrı kaydet.

Ayırıcı tanı

Gerçek intrakraniyal kanama

Kontrastsız kafa serisinde damar yolunu takip etmeyen, sulkus, sisterna veya parankim içinde izlenen hiperdensitedir.

Hareket artefaktı

Travma BT’sinde solunum hareketi, diyafram yapılarının değerlendirilmesini güçleştirebilir.

Metal artefaktı

cismin yakınında ışın sertleşmesi ve çizgilenme yapar; şüpheli alanın karşı düzlem ve komşu kesitlerde devam edip etmediğine bakılır.

Tuzaklar

• Tüm vücut BT'yi her ağır travma hastasına otomatik uygulanan tek reçete gibi sunma; hemodinamik durum, hemen müdahale gereksinimi ve yerel protokol görüntüleme kararını değiştirir.
• Tek fazlı gövde BT'sini arteriyel ve portal fazların tüm sorularını yanıtlıyor gibi yorumlama; damar yaralanması kuşkusunda amaçlı anjiyografik edinim gerekebilir.
• Kafa-boyun geçişini veya ekstremiteyi tarama alanı dışında bırakıp normalmiş gibi sonuçlandırma; scout ve son görüntü kapsamını raporla.

Kendini dene

1. Kafa travması sonrası hiperdansite yalnız kortikal sulkus lümenini dolduruyor. En olası tanı nedir?

   • Travmatik subaraknoid kanama
   • Subdural hematom
   • Epidural hematom
   • Beyin kontüzyonu
   Cevabı göster

   Travmatik subaraknoid kanama. Sulkus içindeki kan travmatik subaraknoid kanamayı destekler. Subdural hematom ekstraaksiyel hilal biçimindedir; epidural hematom çoğunlukla bikonvekstir; kontüzyon kortikal parankim içinde yer alır.

2. Intrakraniyal kanama sınıflamasında 'intraserebral kanama' (ICH) terimi hangi yapıları kapsar?

   • Yalnızca beyin sapı kanamaları
   • Parankimal (IPH) ve/veya intraventriküler (IVH) kanamalar
   • Yalnızca subaraknoid ve subdural kanamalar
   • Yalnızca ekstraaksiyel kanamalar
   Cevabı göster

   Parankimal (IPH) ve/veya intraventriküler (IVH) kanamalar. S75'e göre ICH, parankimal (IPH) ve/veya intraventriküler (IVH) kanamaları kapsar; daha geniş kapsam ICrH'dir.

Bu konunun yer aldığı turlar

• Politravma (tüm gövde) BT'si

İlgili konular

• Subdural hematom
• Kalvaryum ve kafa tabanı kırığı

Kaynaklar

Bu sayfadaki 33 cümle ve 2 quiz sorusu aşağıdaki kaynaklardan alıntılarla tek tek karşılaştırıldı; 7 cümle bu karşılaştırmada düzeltildi (2026-10-08).

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