Yoğun Bakımda COVID-19 Hastalarında Sıvı Yönetimi
Özet
Yoğun bakımda takip edilen COVID-19 hastalarında sıvı yönetimi, ARDS ve sepsis gibi klinik tablolar nedeniyle kritik bir öneme sahiptir. Ateş, ishal ve beslenme yetersizliği gibi nedenlerle artan sıvı kayıpları hipovolemik şoku tetikleyebilirken, septik şoka eşlik eden sitokin fırtınası da kapiller kaçak ve efektif sirkülatuar volüm azalmasına yol açar. Bu süreçte sıvı tedavisinin takibi canlandırma, optimizasyon, stabilizasyon ve de-eskalasyon olmak üzere 4 fazlı modelle yönetilmektedir. COVID-19'a sıklıkla ARDS'nin eşlik etmesi sebebiyle, akciğer ödemini ve organ yetmezliklerini önlemek adına sıvı resüsitasyonunda konservatif (kısıtlayıcı) yaklaşım tercih edilir. Hemodinamik izlemde statik parametreler (CVP, PAOP) yetersiz kaldığından; cilt beneklenmesi, kapiller dolum zamanı ve laktat ölçümü gibi klinik bulguların yanı sıra pasif bacak kaldırma, ekspiryum sonu oklüzyon ve sıvı yükleme gibi dinamik testler kullanılır. Sıvı seçiminde ise normal salin yerine plazmaya en yakın dengeli kristaloid solüsyonların tercih edilmesi önerilmekte; albümin mortaliteyi etkilemeden oksijenasyonu iyileştirirken, yan etkileri nedeniyle HES, jelatin ve dekstran gibi kolloidlerin kullanımından kaçınılması gerekmektedir. Sonuç olarak, aşırı sıvı yüklenmesi ile hipovolemi arasındaki hassas dengenin kurulması ancak yakın hemodinamik takip ile mümkündür.
Fluid management in critically ill COVID-19 patients in the intensive care unit is of paramount importance due to clinical conditions such as ARDS and sepsis. While increased fluid losses from fever, diarrhea, and nutritional deficiencies can trigger hypovolemic shock, capillary leakage resulting from cytokine storms accompanying septic shock also reduces effective circulatory volume. This process is managed through a four-phase fluid therapy model consisting of resuscitation, optimization, stabilization, and de-escalation. Because ARDS frequently accompanies COVID-19, a conservative fluid resuscitation approach is preferred to prevent pulmonary edema and non-pulmonary organ failure. Since static measurements (CVP, PAOP) are insufficient for hemodynamic monitoring, clinical signs such as skin mottling, capillary refill time, and lactate levels, alongside dynamic tests like passive leg raising, end-expiratory occlusion, and fluid challenges, are utilized. Regarding fluid selection, balanced crystalloids are preferred over normal saline; while albumin improves early oxygenation without affecting mortality, colloids such as HES, gelatins, and dextrans should be avoided due to adverse effects. In conclusion, achieving a precise balance between fluid overload and hypovolemia requires meticulous, individualized hemodynamic monitoring.
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