Tedavi Sırasında Ortaya Çıkan Santral Uyku Apne
Özet
Tedaviyle ortaya çıkan santral uyku apne (TOSUA), obstrüktif uyku apne sendromu (OSAS) tanılı hastalarda pozitif hava yolu basıncı (PAP) tedavisiyle obstrüktif olayların giderilmesi sonucu santral apne ve hipopnelerin gelişmesiyle karakterize bir tablodur. OSAS nedeniyle PAP uygulanan hastaların %5-15'inde görülen bu bozukluğun tanısı için polisomnografi (PSG) yeterlidir. Erkek cinsiyet, düşük vücut kitle indeksi, kalp yetmezliği, ileri yaş, supin pozisyonu ve yüksek CPAP ayarı önemli risk faktörleri arasındadır. Patofizyolojisinde artmış kemosensitivite, hipokapni, uykuda solunum kontrol düzensizliği ve "loop gain" (ventilatuvar döngü kazancı) mekanizmaları rol oynar. TOSUA hastaları asemptomatik olabileceği gibi gündüz aşırı uyku hali, kötü uyku kalitesi, yorgunluk ve sabah baş ağrıları gibi OSAS semptomları da gösterebilir. Birçok hastada 2-3 aylık CPAP tedavisiyle kendiliğinden iyileşme gözlenirken, iyileşmeyen ve dirençli vakalarda adaptif servo-ventilasyon (ASV) veya iki seviyeli pozitif hava yolu basıncı (BiPAP) modlarına geçiş yapılması önerilir. Ayrıca tedaviye oksijen ve pozisyonel yaklaşımlar da eklenebilir.
Treatment-emergent central sleep apnea (TECSA) is characterized by the emergence and persistence of central apneas and hypopneas following the resolution of obstructive events with positive airway pressure (PAP) therapy in patients with obstructive sleep apnea syndrome (OSAS). Occurring in approximately 5% to 15% of OSAS patients undergoing PAP therapy, its diagnosis relies on polysomnography (PSG). Risk factors include male gender, lower body mass index, heart failure, advanced age, supine position, and high CPAP settings. Although the exact pathophysiology remains unknown, increased chemosensitivity, hypocapnia, sleep instability, and high ventilatory loop gain are highly implicated. Patients may be asymptomatic or present with OSAS-like symptoms, including excessive daytime sleepiness, poor sleep quality, fatigue, and morning headaches. Most TECSA cases resolve spontaneously after 2 to 3 months of continuous CPAP therapy. For persistent cases, switching to adaptive servo-ventilation (ASV) or bilevel positive airway pressure (BiPAP) modes is recommended, as ASV dynamically adjusts pressure support to prevent central events. Supplemental oxygen and positional therapy can also be integrated into the treatment.
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