Deviations from NIRS-derived optimal blood pressure are associated with worse outcomes after pediatric cardiac arrest.

AIM: Evaluate cerebrovascular autoregulation (CAR) using near-infrared spectroscopy (NIRS) after pediatric cardiac arrest and determine if deviations from CAR-derived optimal mean arterial pressure (MAPopt) are associated with outcomes. METHODS: CAR was quantified by a moving, linear correlation between time-synchronized mean arterial pressure (MAP) and regional cerebral oxygenation, called cerebral oximetry index (COx). MAPopt was calculated using a multi-window weighted algorithm. We calculated burden (magnitude and duration) of MAP less than 5 mmHg below MAPopt (MAPopt - 5), as the area between MAP and MAPopt - 5 curves using numerical integration and normalized as percentage of monitoring duration. Unfavorable outcome was defined as death or pediatric cerebral performance category (PCPC) at hospital discharge ≥3 with ≥1 change from baseline. Univariate logistic regression tested association between burden of MAP less than MAPopt - 5 and outcome. RESULTS: Thirty-four children (median age 2.9 [IQR 1.5,13.4] years) were evaluated. Median COx in the first 24 h post-cardiac arrest was 0.06 [0,0.20]; patients spent 27% [19,43] of monitored time with COx ≥ 0.3. Patients with an unfavorable outcome (n = 24) had a greater difference between MAP and MAPopt - 5 (13 [11,19] vs. 9 [8,10] mmHg, p = 0.01) and spent more time with MAP below MAPopt - 5 (38% [26,61] vs. 24% [14,28], p = 0.03). Patients with unfavorable outcome had a higher burden of MAP less than MAPopt - 5 than patients with favorable outcome in the first 24 h post-arrest (187 [107,316] vs. 62 [43,102] mmHg × Min/Hr; OR 4.93 [95% CI 1.16-51.78]). CONCLUSIONS: Greater burden of MAP below NIRS-derived MAPopt - 5 during the first 24 h after cardiac arrest was associated with unfavorable outcomes.

Routine Neurological Assessments by Nurses in the Pediatric Intensive Care Unit.

BACKGROUND: Brain injury with changes in clinical neurological signs and symptoms can develop while children are undergoing treatment in the intensive care unit. Critical care nurses routinely screen for neurological decline by using serial bedside neurological assessments. However, assessment components, frequency, and communication thresholds are not standardized. OBJECTIVES: To standardize neurological assessment procedures used by nurses, improve compliance with physicians' ordering and nurses' documentation of neurological assessments, and explore the frequency with which changes from preillness neurological status and previous assessments can be detected by using the assessment tool developed. METHODS: A quality improvement intervention was implemented during a 1-year period in a 55-bed pediatric intensive care unit with 274 nurses. Procedures for neurological assessment by nurses were standardized, a system for physicians to order neurological assessments by nurses at a frequency based on the patient's risk for brain injury was developed and implemented, and a system to compare patients' current neurological status with their preillness neurological status was developed and implemented. RESULTS: Process metrics that focused on compliance of ordering and documenting the standardized neurological assessments indicated improvement and sustained compliance greater than 80%. Exploratory analyses indicated that 29% of patients had an episode of neurological decline and that these episodes were more common in patients with developmental disabilities than in patients without such disabilities. CONCLUSIONS: Compliance with physicians' ordering and nurses' documentation of standardized neurological assessments significantly increased and had excellent sustainability. Further work is needed to determine the sensitivity of standardized nurses' neurological assessment tools for clinically meaningful neurological decline.

Inter-Rater Reliability Between Critical Care Nurses Performing a Pediatric Modification to the Glasgow Coma Scale.

OBJECTIVES: Estimate the inter-rater reliability of critical care nurses performing a pediatric modification of the Glasgow Coma Scale in a contemporary PICU. DESIGN: Prospective observation study. SETTING: Large academic PICU. PATIENTS/SUBJECTS: All 274 nurses with permanent assignments in the PICU were eligible to participate. A subset of 18 nurses were selected as study registered nurses. All PICU patients were eligible to participate. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: PICU nurses were educated and demonstrated proficiency on a pediatric modification of the Glasgow Coma Scale we created to make it more applicable to a diverse PICU population that included patients who are sedated, mechanically ventilated, and/or have developmental disabilities. Each study registered nurse observed a sample of nurses perform the Glasgow Coma Scale, and they independently scored the Glasgow Coma Scale. Patients were categorized as having developmental disabilities if their preillness Pediatric Cerebral Performance Category score was greater than or equal to 3. Fleiss' Kappa (κ), intraclass correlation coefficient, and percent agreement assessed inter-rater reliability for each Glasgow Coma Scale component (eye, verbal, motor) and age-specific scale (≥ 2 and < 2-yr-old). The overall percent agreement between study registered nurses and nurses was 89% for the eye, 91% for the verbal, and 79% for the motor responses. Inter-rater reliability ranged from good (intraclass correlation coefficient = 0.75) to excellent (intraclass correlation coefficient = 0.96) for testable patients. Agreement on the motor response was significantly lower for children with developmental disabilities (< 2 yr: 59% vs 95%; p = 0.0012 and ≥ 2 yr: 55% vs 91%; p = 0.0012). Agreement was significantly worse for intermediate range Glasgow Coma Scale motor responses compared with responses at the extremes (e.g., motor responses 2, 3, 4 vs 1, 5, 6; p < 0.05). CONCLUSIONS: A pediatric modification of the Glasgow Coma Scale performed by trained PICU nurses has excellent inter-rater reliability, although reliability was reduced in patients with developmental disabilities and for intermediate range Glasgow Coma Scale responses. Further research is needed to determine the effectiveness of this Glasgow Coma Scale modification to detect clinical deterioration.