Özet
Femur boyun kırığı, özellikle düşük enerjili düşme sonrası yaşlı hastalarda; genç erişkinde ise yüksek enerjili travmada görülür ve intrakapsüler yerleşimi nedeniyle femur başı dolaşımını etkileyebilir. İnce kesit kontrastsız BT, kortikal basamaklanmayı, trabeküler kesintiyi ve fragman hizasını göstererek kırık morfolojisini tanımlar. Grafiler normalken klinik kuşku sürüyorsa BT'de görünmeyen trabeküler veya inkomplet kırık olabileceği akılda tutulur. Kırığın gözden kaçması yer değiştirme ve femur başı komplikasyonları riskini artırabilir.
Faz ve pencere
- Kontrastsız tanısal
- Femur boyun kırığında BT, kırık örüntüsünü daha iyi anlamak için kullanılabilir.
- Kemik algoritması tanısal
- Üç boyutlu bilgisayarlı tomografi ve çok planarlı rekonstrüksiyonlar, kırık hattının boyundan trokanterlere uzanımını ve indirgenme zorluğunu değerlendirmek için kullanışlıdır.
Önerilen pencereler: Kemik (G 1800 / M 400).
BT bulguları
- Subkapital kırık — hat femur başı-boyun bileşkesinden geçer; eklem kapsülü içindedir.
- Transservikal kırık hattı femur boynunun gövdesinde yer alır ve damarsal hasar riski subkapital kırıklara kıyasla moderahtir.
- Baziservikal kırık boyun tabanında yer alır ve femur başı perfüzyonuna en az zararı veren kırık tipidir ancak kendi içinde biyomekanik olarak kararsızdır.
- Kortikal/trabeküler kesinti — ince oblik lusent çizgi, korteks basamağı veya trabeküler hizalanma kaybı.
- Deplasman — baş-boyun ekseni ile proksimal femur şaftı arasındaki uyum bozulur; varus, valgus, rotasyon veya kısalma eşlik edebilir.
- Valgus pozisyonunda impakte femur boyun kırıklarında anatomik restorasyon klinik açıdan güç olabilir.
Ölçütler ve sınıflamalar
- Garden
- Garden sınıflamasına göre: I tip minimal yer değiştirmeli; II tip kas çekimine bağlı ileri yer değiştirmeli; III tip kısmi yer değiştirmeli; IV tip tam yer değiştirmeli kırık.
- AO/OTA femur boyun (31-B)
- 31-B1: subkapital; 31-B2: transservikal; 31-B3: baziservikal femur boyun kırığı.
Normalde
Aynı tarafta baş-boyun eksenini, üst ve alt korteksin sürekliliğini ve karşı kalçadaki eş düzey kortikal konturları kıyaslayın.
Normal BT ile kıyasla
Aynı bölgenin, kaynak veri setinde patoloji içermediği belirtilen bir BT incelemesini kesit kesit kaydırın; organ sınırlarını açarak anatomiyi hasta görüntüsüyle karşılaştırın. Küçük rastlantısal bulgular tümüyle dışlanmamıştır.
Kaynak: TotalSegmentator v2.01 veri seti (Wasserthal ve ark., Radiology: Artificial Intelligence 2023), CC BY 4.0, vaka s1256; organ sınırları veri setinin otomatik segmentasyonundan, birleştirilerek sadeleştirildi. Görüntüler 2,5 mm kesit aralığına yeniden örneklendi.
Ayırıcı tanı
- Femur başı kırığı
- eklem yüzünde, çoğu kez fovea capitis düzeyine göre konumlanan osteokondral fragman vardır.
- Normal kemik iliği kanalı kırık hattı taklit edebilir; radyografik özelliklerinin bilinmesi yanlış yorumu önler.
Tuzaklar
- İlk günlerde BT'de seçilmeyen inkomplet veya trabeküler kırık olabilir; devam eden travma kuşkusunda negatif BT'yi kesin dışlama saymayın.
- Besleyici damar kanalına bağlı radyolüsent çizgi eksik kırık hattını taklit edebilir; tanıyı doğrulamak için kontralateral görüntüleme veya BT kullanılır.
- Baziservikal femur boyun kırıkları biyomekanik açıdan kararsız olabilir.
Kendini dene
Düşme sonrası kalça ağrısında koronal BT'de femur boynunu çaprazlayan kortikal basamak ve baş-boyun ayrışması görülüyor. En olası kırık hangisi?
Cevabı göster
Femur boyun kırığı. Hat femur boynunun içindedir. İntertrokanterik kırık trokanterler arasında, asetabulum kırığı yuva kemiklerinde, femur başı kırığı eklem yüzünde yer alır.
Grafileri normal ancak travma sonrası yük veremeyen hastanın erken kontrastsız BT'si kırık göstermiyor. Hangi yorum doğrudur?
Cevabı göster
İnkomplet kırık yine olabilir. Erken veya trabeküler inkomplet femur boyun kırığı BT'de görünmeyebilir. Negatif BT tek başına klinik kuşkuyu ortadan kaldırmaz; kontrast fazı kemik kırığını ortaya çıkarmak için gerekli değildir, Pipkin femur başı kırıklarını sınıflar.
İlgili konular
Kaynaklar
Bu sayfadaki 35 cümle ve 2 quiz sorusu aşağıdaki kaynaklardan alıntılarla tek tek karşılaştırıldı; 12 cümle bu karşılaştırmada düzeltildi (2026-10-08).
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Eğitim amaçlıdır; hasta başında tanı ve tedavi kararının yerine geçmez. İçerik yapay zekâ destekli bir süreçle güncel literatüre göre cümle cümle kaynaklarla karşılaştırıldı, ancak uzman radyolog incelemesinden geçmedi. Klinik kararlarda güncel kılavuzları, kurum protokollerini ve radyoloji raporunu esas alın.