Randomized controlled trial for intermittent versus continuous propofol sedation for pediatric brain and spine magnetic resonance imaging studies.

OBJECTIVES: Intermittent bolus propofol is an effective agent for pediatric magnetic resonance imaging sedation but requires constant vigilance and dose titration. Magnetic resonance imaging-compatible infusion pumps may make it possible to continuously infuse propofol, achieving a steady level of sedation at a lower total dose. This study investigates total propofol dose, recovery time, and magnetic resonance image quality in children receiving intermittent vs. continuously infused propofol sedation in children undergoing brain and spine magnetic resonance imaging studies. DESIGN: An open-label, prospective, randomized, controlled study. A single-blinded radiologist rated the quality of magnetic resonance images. SETTING: Children's hospital pediatric radiology sedation center. PATIENTS: One hundred seventy children age 1 month to 18 yrs undergoing deep sedation for brain, spine, or both brain and spine magnetic resonance imaging. INTERVENTIONS: After informed consent, patients were randomly assigned to two groups: group 1 (intermittent) received a propofol bolus of 2-4 mg/kg, followed by repeat boluses of 0.5-2 mg/kg/dose as needed. Group C (continuous) received a bolus of propofol 2-4 mg/kg, followed by a continuous infusion of 100 µg/kg/min with 1-mg/kg/dose boluses with drip titration to effect. MEASUREMENTS AND MAIN RESULTS: Patient demographics, sedation risk assessment, propofol dose, sedation recovery times, incidence of complications, and quality of the magnetic resonance imaging studies were measured. A total of 170 children were enrolled in the study, with 75 in group C and 95 in group I. Both groups were similar with regard to age, weight, gender, and magnetic resonance imaging study type. Group C required a lesser dose of propofol (132 ± 54 µg/kg/min) compared to (162 ± 74 µg/kg/min) in that required in group I (p = .018). There were no differences between the two groups with regard to quality of the imaging study, recovery time, or incidence of complications. CONCLUSIONS: Compared to intermittent bolus dosing, continuous propofol infusion provides lesser dose exposure without impacting recovery time or quality of the magnetic resonance imaging study.

Survival and functional outcome in pediatric traumatic brain injury: a retrospective review and analysis of predictive factors.

OBJECTIVE: The aim of this study was to evaluate the relationship of patient care variables to survival and functional outcome in the pediatric population with traumatic brain injury. DESIGN: Retrospective chart review. SETTING: A 16-bed pediatric critical care unit in an academic community children's hospital. PATIENTS: A total of 320 consecutive pediatric patients with traumatic brain injuries admitted to our pediatric critical care unit between 1992 and 1996. INTERVENTIONS: Patients were managed using our standard traumatic brain injury protocol. MEASUREMENTS AND MAIN RESULTS: A total of 230 patient variables encompassing demographic data, prehospital, emergency department, and pediatric critical care unit care were recorded. A total of 79 patients were severely injured, with admitting Glasgow Coma Scale scores of < or =10. There were 18 deaths. Only two patients survived without cognition. Ninety-five of 302 survivors required inpatient rehabilitation. Of these, 73 were old enough to be compared using FIMTM scores. At the time of discharge from rehabilitation, 52 patients (71%) were functioning independently, 20 (27%) were moderately dependent, and one patient was completely dependent. Analysis of variables with respect to survival revealed that an inability to maintain a cerebral perfusion pressure of > or =50 mm Hg on the first pediatric critical care unit day (p =.0002) and the presence of bradycardia in the emergency department (p =.0139) were the strongest factors associated with mortality. By using the regression equation generated from this model, we could correctly identify survivors and nonsurvivors with a predictive value of 94%. CONCLUSIONS: The ability to maintain a cerebral perfusion pressure of > or =50 mm Hg was the single most important predictor of traumatic brain injury survival in this study. This suggests that monitoring and optimizing cerebral perfusion pressure is critical to the management of these patients. The relationship between cognitive outcome and therapeutic interventions used to optimize cerebral perfusion pressure is unclear and requires further evaluation in a large prospective study.