Yanık Hastasında Anestezi ve Ağrı Yönetimi
Özet
Majör yanık yaralanmaları, ilk 24-48 saatte yanık şoku, myokardiyal depresyon, artan vasküler direnç ve üçüncü boşluğa sıvı kaybı ile karakterize sistemik, hemodinamik ve patofizyolojik değişikliklere neden olur. Bu süreçte GFR artsa da tübüler hasar maskelenebilir, hipoksiye bağlı SSS disfonksiyonu, koagülopati ve bağışıklık baskılanması nedeniyle enfeksiyon eğilimi gelişebilir. Perioperatif yönetimde invaziv monitörizasyon zorlukları, supraglottik ödem ve kimyasal hasara bağlı havayolu ve akciğer koruyucu ventilasyon gereksinimleri öne çıkar. Sıvı resüsitasyonu Parkland formülüyle idrar çıkışına göre titre edilirken, ısı kaybını önlemek için agresif ısıtma stratejileri ve yakın takip şarttır. İndüksiyonda hiperpotasemi riski nedeniyle süksinilkolinden kaçınılarak rokuronyum tercih edilmeli; propofolün hipotansif, etomidatın ise mortaliteyle ilişkili adrenal baskılayıcı etkileri bilinerek, sempatik stimülasyon sağlayan ketamin gibi uygun ajanlar seçilmelidir. Anestezi idamesinde artan ilaç dağılım hacmi ve opioid toleransı gözetilmeli; nosiseptif ile nöropatik özellik gösteren yanık ağrısının multidisipliner yönetiminde opioidlerin yanı sıra ketamin, deksmedetomidin, lidokain, gabapentin ve rejyonal blokları içeren multimodal analjezi stratejileri uygulanmalıdır.
Major burn injuries cause systemic, hemodynamic, and pathophysiological alterations characterized by burn shock, myocardial depression, increased vascular resistance, and third-space fluid loss within the first 24-48 hours. Although GFR increases, tubular damage may be masked, and CNS dysfunction due to hypoxia, coagulopathy, and immunosuppression can predispose patients to infections. Perioperative management highlights invasive monitoring difficulties, alongside airway and lung-protective ventilation requirements driven by supraglottic edema and chemical inhalation injury. Fluid resuscitation is titrated via the Parkland formula based on urine output, while aggressive warming strategies and close monitoring are mandatory to prevent heat loss. During induction, succinylcholine must be avoided due to hyperkalemia risks, making rocuronium the preferred alternative; induction agents must be selected carefully, considering propofol's hypotensive and etomidate's mortality-associated adrenal-suppressive effects, whereas ketamine is favorable for providing sympathetic stimulation. Maintenance of anesthesia requires addressing increased volume of distribution and opioid tolerance; managing burn pain, which exhibits nociceptive and neuropathic traits, necessitates multimodal analgesia strategies incorporating opioids alongside ketamine, dexmedetomidine, lidocaine, gabapentin, and regional nerve blocks.
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