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  • Title: Association of nursing workload and unplanned extubations in a pediatric intensive care unit.
    Author: Ream RS, Mackey K, Leet T, Green MC, Andreone TL, Loftis LL, Lynch RE.
    Journal: Pediatr Crit Care Med; 2007 Jul; 8(4):366-71. PubMed ID: 17545927.
    Abstract:
    OBJECTIVE: To estimate nursing workload from the patient acuity level (PAL) assigned to patients in a pediatric intensive care unit (PICU) and to determine its influence on unplanned extubations. DESIGN: Prospective cohort study. SETTING: The 19-bed PICU of an urban, university-affiliated, tertiary children's hospital. PATIENTS: All patients admitted to the PICU. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: The study encompassed 2,193 nursing shifts and 1,919 admissions to the PICU over 24 months. The shift census averaged 12.0 patients (range 5-18) and was staffed by 9.4 nurses (range 4-16) for an average patient/nurse ratio of 1.3 +/- 0.2. Patients were assigned a PAL of 1-7 based on a classification system derived from time studies of 12 general nursing tasks. The total PALs per shift divided by the number of nursing staff yielded an average assignment of 5.8 +/- 0.7 PALs. Forty unplanned extubations (0.76 unplanned extubations/100 ventilator days) were observed during the study period. Logistic regression revealed positive associations between unplanned extubations and patient/nurse ratio (p = .03) and the shift PAL/nurse ratio (p = .01). The likelihood of an unplanned extubation when nurses covered >6.3 PALs was 3.8 times higher than during those shifts when they covered <5.3 PALs. CONCLUSIONS: The likelihood of an unplanned extubation increased with higher patient/nurse and patient acuity/nurse ratios. Successful interventions to reduce the frequency of this medical error may need to address both nurse demand methodology and workload.
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