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Successful Alerts and Responses: Real-time
Monitoring of ED Chief Complaints and Investigation
of AnomaliesCDC Public Health Preparedness Conference
February 23, 2005Loren Shaffer, MPH
Ohio Department of Health
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Real-time Outbreak and Disease Surveillance (RODS)
Developed by team at the University of Pittsburgh led by Mike Wagner, MD, PhD
Utilizes existing data (HL7 format) from hospital’s registration database
Interprets and maps free-text chief complaint into syndrome category
Interprets and maps sales of over-the-counter medication
Accessed by end user via the internet
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EmergencyDepartment
CategorizeInto
SyndromesDailyTotals
TotalsHigher ThanExpected?
HistoricalModels
Alert
ReviewTrends
Chief Complaint andPatient Demographics
In HL7 messages
Daily
Continuous
Continuous
Updated monthly
ValidAlert?
InitiateResponse
Syndromic SurveillanceSyndromic SurveillanceData FlowData Flow
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MSH|^~\&||xxx||RODS|200202241715||ADT^A04|2002022XXXXXXXX|P|2.3<CR>
PID|||||||^020|M|||^^^^84204|||||<CR>
PV1||E|||||||||||||||||98765432||||||||||||||||||||||||200202151830||<CR>
DG1||||SORE THROAT,COUGH<CR>
IN1||||||||||||||||||||||||||||||||||||||||||||^^^^84056<CR>
<ETX>
Sample HL7 ADT Sample HL7 ADT MessageMessage
Zip code
Visit date and time
Free-text chief complaint
Age & Gender
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RODSNavigation – EpiPlot Screen
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RODSNavigation – Mapplot
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RODSNavigation – Chief Complaints
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Ohio’s ApproachOhio’s Approach
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Some BottomSome BottomLines (Incentives) for HospitalsLines (Incentives) for HospitalsCost for RODS installation paid for by ODH with
HRSA grant moneyMinimal configuration time - via telephone with
assistance of RODS engineersRuns in background – No additional duties for ED or
IT personnelData are secure and “de-identified” –
patient privacy is maintainedHIPAA compliantJCAHO Standards
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RODS ProjectProgress
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RODS ProjectProgress
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GeographicCoverage
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Example #1:Respiratory Visits
12/24/2004 @ 14:58: alert for all Ohio Normalized increase from 11.5% to 15%
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Example #1:Respiratory Visits
12/23/2004: Severe ice storm results in massive power outages.
Stores throughout area sell out of kerosene and other supplemental heating units.
Review of chief complaints reveals carbon monoxide poisoning as culprit.
Total preliminary investigation: 10 minutes
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Example #2:Norwalk Virus Outbreak
January 11, 2005: Norwalk-like outbreak involving 4 staff and 7 residents of nursing home reported to State. Later confirmed via bulk stool analysis.
January 4, 2005: Disease first reported locally with nausea, diarrhea, and vomiting lasting between 12 and 48 hours.
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Example #2:Norwalk Virus Outbreak
12/31/2004: >3 SD from moving average for anti-diarrhea medications in ZIP code 44024
Possibility: community infection brought into nursing home by employee/visitor
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Example #3:Influenza Influenza surveillance includes lab results, ILI sentinel
providers, VA Clinic Visits, Class B, OTC sales, and school closings,
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Example #3:Influenza
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Example #3:Influenza
Franklin Co. resident confirmed with influenza A (H3N2) via lab isolate:1/19/05
Specimen date:1/4/2005
Illness Onset date:1/1/2005
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Integrating RODS Into Ohio’s Surveillance Program
Establishing intrastate user visibility Who gets access Area of surveillance Data made available
Inter-state visibility Identifying other states using How much visibility into each other’s jurisdiction
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IntegrationContinued
Review and analysis Frequency At what level Standardization of analysis
What to do with alerts Who is alerted Preliminary investigation Documentation
Protocol for monitoring, responding, etc. 24/7
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Ohio Department of HealthEarly Event Surveillance Staff
Loren Shaffer, Supervisor [email protected]
Shannon Rowe, Immunization Epidemiologist [email protected]
Brian Fowler, Syndromic Surveillance Epi. [email protected]
Muhammad Abbasi, Bio-terrorism Epi. [email protected]
Brenda Mocarski, Infec. Dis. Control Consultant [email protected]