Hipotermia untuk Proteksi Otak
Abstract
Proteksi otak adalah serangkaian tindakan yang dilakukan untuk mencegah atau mengurangi kerusakan sel-sel otak yang diakibatkan oleh keadaan iskemi. Iskemia adalah gangguan hemodinamik yang akan menyebabkan penurunan aliran darah otak sampai suatu tingkat yang akan menyebabkan kerusakan otak yang ireversibel. Iskemi serebral dan atau hipoksia dapat terjadi sebagai konsekuensi dari syok, stenosis atau oklusi pembuluh darah, vasospasme, neurotrauma, dan henti jantung. Hipotermia dibagi menjadi hipotermia ringan (33-36OC), hipotermia sedang (28-32OC), hipotermia dalam (11-20OC), profound (6-10OC), dan ultraprofound (<5OC).Teknik hipotermia di bagi kedalam 3 fase yaitu: fase induksi, fase rumatan dan fase rewarming. Teknik hipotermia yang dianjurkan adalah hipotermia ringan hingga sedang dan penggunaannya segera setelah cedera otak traumatika dan tidak lebih dari 72 jam. Hipotermia dapat mempengaruhi sistem kardiovaskuler, sistem respirasi, infeksi dan fungsi saluran cerna, sistem ginjal, asam basa dan hematologi. Efek hipotermia sebagai proteksi adalah efek terhadap metabolism dan aliran darah otak, excitotoxicitas, oxidative stress dan apoptosis, inflamasi, blood-brain barrier (BBB), permeabilitas pembuluh darah dan pembentukan edema, dan terhadap mekanisme ketahanan hidup sel. Mekanisme proteksi otak dengan hipotermi belum sepenuhnya dimengerti dengan jelas, hanya sebagian saja diketahui bagaimana mekanismenya. Rewarming adalah proses pemulihan temperatur ini ke temperatur inti normal. Rewarming harus dilakukan sangat pelahan untuk mengurangi kejadian komplikasi seperti hipertemia, hiperkalemia dan kerusakan sel.
Hypothermia for Brain Protection
Cerebral protection is the preemptive use of theurapeutic intervention to avoid or decrease neurologic damage cause by ischemia. Ischemia is defined as perfussion insufficient to the level will be cause irreversible brain damage. Cerebral ischemia and or hypoxia as consequency of shock, stenosis or vascular occlusion, vasospasm, neurotrauma, and cardiac arrest. Hypothermia were divided into mild hypothermia (33-36OC), hypothermia was (28-32oC), hypothermia in the (11-20oC), profound (6-10°C), and ultraprofound (<5oC). Hypothermia technique is classified into 3 phases namely: an induction phase, maintenance phase and the phase of rewarming. The recommended technique of hypothermia is mild to moderate hypothermia and its use soon after brain injury traumatika and not more than 72 hours. Hypothermia can affect the cardiovascular system, respiratory system, gastrointestinal tract infections and function, renal system, acid-base and hematologic. Effect of hypothermia as brain protective are effect on cerebral blood flow and metabolism, on excitotoxicity, oxidative stress and apoptosis, inflammation, blood-brain barrier (BBB), permeability of blood vessels and form of edema, and the mechanisms of cell survival. Mechanism of brain hypothermia protection as a whole is not clearly known mechanism, only in part be obvious how mthe mechanism. Rewarming is the core body temperature returns to normal core body temperature. Rewarming should be done very slowly to reduce the incidence of complication as hyperthermia, hyperkalemia and cell damage.
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DOI: https://doi.org/10.24244/jni.vol1i4.197
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