Unclogging the Pediatric Emergency Room: Impact of Rapid Viral Diagnostics

• Length of Emergency Department visit (from initial physician contact to discharge from Emergency Department) [ Time Frame: Unspecified ]
  

• Rate of antibiotic prescription in Emergency Department. [ Time Frame: Unspecified ]
  
• Rate of ancillary tests performed in Emergency Department. [ Time Frame: Unspecified ]
  

Procedure: Nasopharyngeal washing for viral antigen detection by immunofluorescence initiated early in ED visit.
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Description of Project:

Background: Acute viral respiratory tract infections are among the most common infectious problems of childhood during the first five years of life, particularly among infants younger than 2 years of age. Although the majority of these infections does not require medical attention and are self-limited in nature, worried parents commonly bring their children to the emergency department (ED) for evaluation (average 2500 children/winter). EDs are choke points in the health care system, especially at the peaks of the annual influenza season and respiratory syncytial virus (RSV) season. Without a prompt specific viral diagnosis in a child presenting to the ED with a febrile respiratory illness, after being seen by a physician, a child may have to undergo a constellation of precautionary diagnostic tests (septic work up, CXR) and be prescribed antibiotics unnecessarily. These interventions lead to prolonged ED stays (average 180min +/-120 min), intense use of human health resources (nursing, laboratory and radiology staff) resulting in significant cost both direct and indirect to the health care system, as well as time lost to the children and their families and contribute to antimicrobial resistance. The precise etiology of these viral infection episodes can be determined through the use of rapid screening program such as VIRAP (nasopharyngeal washing for rapid direct viral antigen detection via immunofluorescence). At the moment VIRAP is a physician ordered test, done only after the child has been seen by the physician, usually after the child has already been waiting for a significant length of time, then has to wait further for the results of the test.

Hypothesis: Rapid diagnosis of viral infection through VIRAP initiated by a nurse at triage wit results available for ED physician time of assessment may influence decision making with respect to additional investigations therefore reduce the amount of waiting time in the ED, as well as decrease antibiotic prescriptions. This would ultimately result in improved effectiveness of service provision for children with febrile respiratory illnesses and in turn shorten waiting time for all children in the ED. Health care cost reduction by minimising unnecessary diagnostic tests being performed and antibiotic prescription are also expected.

Study design: We propose to conduct a single centre, open label, randomized controlled trial comparing outcomes of patients undergoing VIRAP at triage vs routine ED admission protocol. During the months of December 2005 to April, and again Dec2006 to April 2007, eligible patients based on our inclusion and exclusion will be enrolled at triage and randomized in a 1:1 ratio to either undergo NPW for VIRAP and have the result available to the treating physician at time of assessment or routine admitting protocol to the ED and await physician assessment without prior investigation.

Criteria: Patients age 3-36 months admitted to the BCCH ED with fever(≥38.5 0C measured in ED or documented by the accompanying parent) and at least one of: cough, runny nose, nasal congestion and sore throat will be eligible for enrolment. Excluded from the study will be patients who are immuno-compromised, who have underlying chronic severe respiratory conditions (cystic fibrosis, bronchopulmonary dysplasia) or chronic heart conditions (uncorrected cyanotic heart lesions, prosthetic valves), who have had prior assessment in our ED department for the current illness. Only one child per family can be enrolled.

End points: The duration of stay in ED (from assessment to discharge, including time waiting for investigations and review of results by the physician) is the primary endpoint. Secondary endpoints include whether any investigations following the assessment (blood test, radiographs or urine tests) were ordered and whether study patients were prescribed antibiotics.