Intensive Care Unit Clinical Trial
Official title:
Functional Recovery Over the First Year After ICU Discharge:How ICU-delirium and ICU-acquired Weakness Interact
Intensive Care Unit Acquired Delirium (ICU-AD) and Intensive Care Unit Acquired Weakness (ICU-AW) are common in critically ill, mechanically ventilated adult patients. As more patients survive ICU stays but suffer from long-term functional declines leading to unemployment and disability, research is urgently needed. The aims of this study are to: 1) describe the trajectory of physical functions one year after ICU discharge, including distance walked in 6 minutes (6MWD), hand grip (HGS), maximum inspiratory pressure (MIP), cognitive function (mini mental state examination,MMSE), physical function ICU test score (PFITs) , medical reserach council scale (MRC), medical research council questionnaire (MRC-Q)and basic and instrumental activities of daily living (ADL/IADL); 2) examine the incidences of ICU-AD and ICU-AW; and 3) test the interaction between ICU-AD and ICU-AW on one-year functional trajectories in the ICU survivors.4) compare two tools, the intensive care delirium screening checklist (ICDSC) and confusion assessment method for the ICU (CAM-ICU), for their predictive validity for outcomes related to delirium, hospital mortality and length of stay (LOS), and examined whether the tools' predictive validity was affected by patients' arousal status (RASS≥0, RASS<0).
For this 3-year cohort study, consecutive ICU stay over 24 hours and adult patients (≧20 years) will be screened for enrollment at 6 medical ICUs in the National Taiwan University Hospital. Participants will be assessed daily for delirium occurrence for up to 14 days of ICU stay, and again upon ICU discharge. The instrument used for delirium are the confusion assessment method for ICU (CAM-ICU) and the intensive care delirium screening checklist (ICDSC). The 7 point rating scale of CAM-ICU-7 will also be used to rate the severity of delirium. Delirium assessment is possible,if the the patient's Richmond Agitation and Sedation Scale (RASS, -5~+4) is ≧ -3, -4~-5 are deeper levels of sedation (unarousable or responsive to painful stimulation only) cannot be assessed accurately. The CAM-ICU comprises four features which assess the following: acute change or fluctuation in mental status (Feature 1), inattention (Feature 2), disorganized thinking (Feature 3) or an altered level of consciousness (Feature 4). Patients are considered to have delirium if they present with both the first (acute onset and fluctuating course) and second (inattention) core symptoms and either the third (altered consciousness) or fourth (disorganized thinking) symptom. The ICDSC comprises eight items (score 0-8), ICDSC score of 4 or higher are considered delirium. At ICU discharge,assess ICU-AW using a standardized protocol. Participants will be followed for one year after ICU discharge at 1, 3, 6, 12 months. A comprehensive functional evaluation (6-minute walking test, grip strength test, maximum inspiratory pressure test, mini-mental state exam, physical function ICU test score and basic and instrument activities of daily living questionnaires, medical research council scale and medical research council questionnaire) will be completed. Estimated 158 participants will be enrolled and followed for one year. Data will be analyzed using the SPSS package. For example, the Generalized Estimating Equation (GEE) will be performed to delineate the trajectory of physical functions one year after ICU discharge and to test the interaction among ICU-AD, ICU-AW, and one-year functional trajectories. The findings will add to the development of intervention program to reduce ICU-AD and ICU-AW, thus promoting functional recovery for ICU survivors. ;
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