Saturday, May 19, 2012
Friday, May 11, 2012
Fenaldopam
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Copyright © 2008 Hammer et al; licensee BioMed Central Ltd.
Pharmacokinetics and pharmacodynamics of fenoldopam mesylate for blood pressure control in pediatric patients
Gregory B Hammer,
1Departments of Anesthesia and Pediatrics, Stanford University School of Medicine, Stanford, USA
2Departments of Anesthesia and Pediatrics, Children's National Medical Center, George Washington University School of Medicine, Washington, USA
3Department of Anesthesia, Stanford University School of Medicine, Stanford, USA
4Departments of Anesthesiology, Critical Care Medicine, and Pediatrics, Johns Hopkins University, Baltimore, USA
5Departments of Anesthesiology and Pediatrics, Wake Forest University School of Medicine, Winston-Salem, USA
Gregory B Hammer: ham@stanford.edu; Susan T Verghese: sverghes@cnmc.org; David R Drover:ddrover@stanford.edu; Myron Yaster: myaster@jhmi.edu; Joseph R Tobin: jtobin@wfubmc.edu
Received April 7, 2008; Accepted October 6, 2008.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Background
Fenoldopam mesylate, a selective dopamine1-receptor agonist, is used by intravenous infusion to treat hypertension in adults. Fenoldopam is not approved by the FDA for use in children; reports describing its use in pediatrics are limited. In a multi-institutional, placebo controlled, double-blind, multi-dose trial we determined the pharmacokinetic (PK) and pharmacodynamic (PD) characteristics and side-effect profile of fenoldopam in children.
Methods
Seventy seven (77) children from 3 weeks to 12 years of age scheduled for surgery in which deliberate hypotension would be induced were enrolled. Patients were randomly assigned to one of five, blinded treatment groups (placebo or fenoldopam 0.05, 0.2, 0.8, or 3.2 mcg/kg/min iv) for a 30-minute interval after stabilization of anesthesia and placement of vascular catheters. Following the 30-minute blinded interval, investigators adjusted the fenoldopam dose to achieve a target mean arterial pressure in the open-label period until deliberate hypotension was no longer indicated (e.g., muscle-layer closure). Mean arterial pressure and heart rate were continuously monitored and were the primary endpoints.
Results
Seventy-six children completed the trial. Fenoldopam at doses of 0.8 and 3.2 mcg/kg/min significantly reduced blood pressure (p < 0.05) during the blinded interval, and doses of 1.0–1.2 mcg/kg/min resulted in continued control of blood pressure during the open-label interval. Doses greater than 1.2 mcg/kg/min during the open-label period resulted in increasing heart rate without additional reduction in blood pressure. Fenoldopam was well-tolerated; side effects occurred in a minority of patients. The PK/PD relationship of fenoldopam in children was determined.
Conclusion
Fenoldopam is a rapid-acting, effective agent for intravenous control of blood pressure in children. The effective dose range is significantly higher in children undergoing anesthesia and surgery (0.8–1.2 mcg/kg/min) than as labeled for adults (0.05–0.3 mcg/kg/min). The PK and side-effect profiles for children and adults are similar
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Friday, April 13, 2012
Chest Pain Assessment in Children
Demographic variables including age at presentation, sex, and clinical characteristics were similar between groups.
Adherence to the SCAMP algorithm for echocardiography was 84%. Practice variation decreased significantly after implementation of the SCAMP (P<0.001).
The number of exercise stress tests obtained was significantly lower in the SCAMP-enrolled patients compared with the historic cohort (∼3% of patients versus 29%, respectively; P<0.001).
Similarly, there was a 66% decrease in utilization of Holter monitors and 75% decrease in the use of long-term event monitors after implementation of the chest pain SCAMP (P=0.003 and P<0.001, respectively).
The number of echocardiograms obtained was similar between groups.
Conclusions Implementation of a SCAMP for evaluation of pediatric chest pain has lead to a decrease in practice variation and resource utilization.
Saturday, March 24, 2012
Fundoplication & Gastrostomy ...outcome of single ventricle
Keating JJ et al. Friday, March 23, 2012
CLOSURE trial result (PFO closure for Stroke)
Anthony J. Furlan et al.
NEJM 2012;366:991-9
Results:
A total of 909 patients were enrolled in the trial. The cumulative incidence (Kaplan–Meier estimate) of the primary end point was 5.5% in the closure group (447 patients) as compared with 6.8% in the medical-therapy group (462 patients) (adjusted hazard ratio, 0.78; 95% confidence interval, 0.45 to 1.35; P=0.37). The respective rates were 2.9% and 3.1% for stroke (P=0.79) and 3.1% and 4.1% for TIA (P=0.44). No deaths occurred by 30 days in either group, and there were no deaths from neurologic causes during the 2-year follow-up period. A cause other than paradoxical embolism was usually apparent in patients with recurrent neurologic events.
Conclusions:
In patients with cryptogenic stroke or TIA who had a patent foramen ovale, closure with a device did not offer a greater benefit than medical therapy alone for the prevention of recurrent stroke or TIA. (Funded by NMT Medical).
Emergency pericardiocentesis video from