Provizyonel Stentleme Tekniği
Özet
Provizyonel stentleme (PS) tekniği, koroner müdahalelerin yaklaşık %15'ini oluşturan bifurkasyon lezyonlarının tedavisinde güncel kılavuzlar tarafından önerilen standart stratejidir. Bu yaklaşım, bifurkasyon anatomisini yeniden yapılandırmaktan ziyade, ana dalın başarılı stent implantasyonuna ve optimizasyonuna odaklanan bir tedavi felsefesidir. İşlem temelde, ana dala yan dal boyunca stent yerleştirilmesi ve ardından elde edilen anjiyografik sonuçlara göre yan dala müdahale edilmesi esasına dayanır. EBC, yan dal akışını korumak ve olası oklüzyonları önlemek amacıyla sistematik "jailed wire" tekniğinin kullanılmasını tavsiye eder. İşlem sırasıyla; ana dal ve yan dalın tellenmesi, gerekli durumlarda predilatasyon, "crossover" stentleme, proksimal malappozisyonu düzeltmek için proksimal optimizasyon tekniği (POT), rewiring ve seçilmiş vakalarda kissing balon veya POT side POT uygulamalarını içerir. Yan dalda ciddi osteal darlık, diseksiyon veya TIMI < 3 akım gibi suboptimal sonuçlar gelişirse, T-stent, TAP veya provizyonel DK Culotte gibi iki stentli tekniklere geçiş düşünülür. PS tekniği, kompleks iki stent stratejilerine kıyasla daha az kontrast madde ve radyasyon maruziyeti sağlaması nedeniyle özellikle yüksek riskli ve kırılgan yaşlı hastalarda önemli bir avantaja sahiptir.
The provisional stenting (PS) technique is the standard strategy recommended by current guidelines for treating bifurcation lesions, which constitute approximately 15% of coronary interventions. Rather than reconstructing the bifurcation anatomy, this approach is a treatment philosophy focused on successful stent implantation and optimization in the main vessel. Basically, the procedure involves placing a stent in the main vessel across the side branch, followed by balloon or stent treatment for the side branch depending on the angiographic result. The EBC recommends systematic use of the "jailed wire" technique to protect side branch flow and prevent potential occlusions. The step-by-step procedure includes wiring both branches, predilation when necessary, crossover stenting, proximal optimization technique (POT) to correct proximal malapposition, rewiring, and kissing balloon or POT side POT applications in selected cases. If suboptimal results such as severe osteal stenosis, dissection, or TIMI < 3 flow occur in the side branch, switching to two-stent techniques like T-stent, TAP, or provisional DK Culotte is considered. The PS technique offers significant advantages, particularly in high-risk and fragile elderly patients, as it requires less contrast and radiation exposure compared to complex two-stent strategies.
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