一項多國聯合研究顯示,對于從重癥監(jiān)護病房(ICU)出院的患者,無論其是否罹患膿毒癥,均可出現多個腦區(qū)永久性認知功能損害及非特異性腦功能障礙。與健康對照相比,膿毒癥幸存者常出現左側海馬萎縮。醫(yī)生應對ICU患者進行神經保護治療,避免發(fā)生持久的腦功能改變。論文將發(fā)表于《神經病學、神經外科學與精神病學雜志》[J Neurol Neurosurg Psychiatry 2013,84(1):62]。
研究者選取從ICU出院的膿毒癥(n=25)和非膿毒癥(n=19)患者,并以現有數據庫中的健康者作為對照,隨訪6~24個月,進行腦部形態(tài)學、標準腦電圖(EEG)、認知與精神健康狀況以及健康相關的生活質量評估。
結果為,與健康對照組相比,膿毒癥幸存者存在語言學習和記憶方面認知功能損害,且其左側海馬體積明顯縮小。此外,膿毒癥幸存者以及某些非膿毒癥幸存者會在EEG上表現較多的低頻活動,提示存在非特異性腦功能障礙。未發(fā)現出院患者與健康對照在健康相關的生活質量、心理功能或抑郁癥狀(應作為混雜因素被排除)方面存在差異。
Persistent cognitive impairment, hippocampal atrophy and EEG changes in sepsis survivors
Objectives
The objective of this preliminary study was to explore long-term changes in neurobehavioral parameters, brain morphology and electroencephalography of sepsis patients who received intensive care compared to non-septic intensive care unit (ICU) patients.
Methods
Two-centre follow-up study 6–24??months after discharge from hospital using published norms and existing databases of healthy controls for comparison. Patients included 25 septic and 19 non-septic ICU survivors who were recruited from two ICUs of a university and community hospital. Measurements used include brain morphology, standard electroencephalography, cognition and psychiatric health and health-related quality of life.
Results
Sepsis survivors showed cognitive deficits in verbal learning and memory and had a significant reduction of left hippocampal volume compared to healthy controls. Moreover, sepsis and to some extent non-septic ICU patients had more low-frequency activity in the EEG indicating unspecific brain dysfunction. No differences were found in health-related quality of life, psychological functioning or depressive symptoms, and depression could be ruled out as a confounding factor.
Conclusions
This study demonstrates permanent cognitive impairment in several domains in both septic and non-septic ICU survivors and unspecific brain dysfunction. In the sepsis group, left-sided hippocampal atrophy was found compared to healthy controls. Further study is needed to clarify what contribution sepsis and other factors at the ICU make to these outcomes. Specific neuroprotective therapies are warranted to prevent persisting brain changes in ICU patients.
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