Üriner Diversiyon Yöntemleri
Özet
Üriner diversiyon, mesane kanseri ve fonksiyon bozukluklarında idrar akışını sağlamak amacıyla kullanılan, tarihsel süreçte gelişim göstermiş cerrahi yöntemlerdir. Bu yöntemler anatomik yapıya ve kontinans (idrar tutabilme) durumuna göre inkontinan ve kontinan olarak sınıflandırılır. İdeal bir diversiyonun düşük basınçlı depolama sağlaması, böbrek fonksiyonlarını koruması ve yaşam kalitesini optimize etmesi beklenir. Yöntem seçimi; hastanın yaşı, genel performans durumu, el becerisi, böbrek/karaciğer fonksiyonları ve cerrahın tecrübesi gibi faktörlere bağlıdır. Cerrahi uygulamalarda mide, jejunum, ileum ve kolon segmentleri kullanılabilmekte olup, kolay mobilizasyon ve düşük metabolik riskleri nedeniyle en sık ileum ve kolon tercih edilir. Son yıllarda iyileşme sürecini hızlandıran ERAS protokolleri ön plana çıkmıştır. İnkontinan diversiyonlar arasında en basiti olan üreterokutaneostomi ve en sık kullanılan ileal/kolon konduitler yer alırken; kontinan kutanöz diversiyonlarda (Indiana, Mainz poş) geniş kapasiteli bir rezervuar ve kateterizasyon mekanizması oluşturulur. Kontinan ortotopik diversiyonlar (Studer, T poş) ise intestinal segmentten yeni mesane yapılarak üretraya bağlanması esasına dayanır ve uygun hastalarda yüksek kontinans sağlar. Her yöntemin enfeksiyon, darlık, kaçak veya metabolik bozukluk gibi kendine özgü avantaj ve dezavantajları bulunmaktadır.
Urinary diversion represents historical surgical methods utilized in bladder cancer and bladder dysfunctions to maintain urine flow, classified as incontinent or continent based on anatomy and continence. An ideal diversion expects low-pressure storage, preservation of renal functions, and optimized quality of life, with method selection depending on patient age, performance status, manual dexterity, renal/hepatic functions, and surgical expertise. Stomach, jejunum, ileum, and colon segments can be utilized in surgeries; however, ileum and colon are most frequently preferred due to easy mobilization and lower metabolic risks, while ERAS protocols accelerating postoperative recovery have gained prominence recently. Incontinent diversions include ureterocutaneostomy as the simplest method and ileal/colonic conduits as the most common, whereas continent cutaneous diversions (Indiana, Mainz pouch) create a large-capacity reservoir and catheterization mechanism. Continent orthotopic diversions (Studer, T-pouch) are based on reconstructing a neobladder from an intestinal segment anastomosed to the urethra, providing high continence in eligible patients. Each method possesses distinct advantages and disadvantages, including complications such as infections, strictures, leakages, or metabolic imbalances, requiring a balanced decision between the physician and patient.
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