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MedBiquitous Virtual Patient Standard: A Technical Overview

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What are virtual patients?

“interactive computer programs that simulate

real life clinical scenarios and provide an

effective way for healthcare professionals to

not only learn about a wide range of clinical

topics, but to practice in a virtual and

therefore safe environment.”

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MedBiquitous Virtual Patient Standard (MVP)• A technical specification for the exchange of

Virtual Patient activities across Virtual Patient systems

Institution A Institution B<XML>

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Does my VP System fit?

• Digital – XML• Delivery

• Web-based• Mobile• Virtual worlds

• Navigation• Linear• Branching• Global

• A representation of data

• Must be interpreted by a runtime system

• Output: zip file of XML documents and media

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Current Limitations

• Does NOT encode artificial intelligence algorithims

• Does NOT encode physiology engine rules and models

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The MVP Architecture

Virtual Patient Data

Data Availability Model

Media Resource

ActivityModel

Player Functional Specification

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• Personal and clinical data

• Similar to a clinical chart

• May include references to healthcare terminologies

Virtual Patient Data

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• Images, animations, videos, etc.

Media Resource

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• Aggregates virtual patient data and media resources for reference in an activity

• Enables progressive disclosure of virtual patient data and media resources

Data Availability Model

Part 1: Patient History

Part 2:Diagnostics

MediaResources

Virtual Patient dataText

Interview item

Diagnostic test

DAM

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• Integrates data and media into a cohesive learning activity

• Node based• Activity flow (node sections,

p 84; links, p 99)• Counters (p 75, p 87)• Timers (p 81)• Rules (p 79)

ActivityModel

Node 1: Start

Node 2: Option

1

Node 3: Option

2

Node 4: Option

3

Node 5: Option

4

Node 5: Option

6

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<ItemPath>

</ItemPath>/VirtualPatientData/VPDText[@id=‘23']

/DataAvailabilityModel/DAMNode[@id=‘463']

<ItemPath>

</ItemPath>/VirtualPatientData/VPDText[@id=‘23']

/DataAvailabilityModel/DAMNode[@id=‘463']

<ItemPath>

</ItemPath>/VirtualPatientData/VPDText[@id=‘23']

/DataAvailabilityModel/DAMNode[@id=‘463']

<ItemPath>

</ItemPath>/VirtualPatientData/VPDText[@id=‘23']

/DataAvailabilityModel/DAMNode[@id=‘463']

<ItemPath>

</ItemPath>/VirtualPatientData/VPDText[@id=‘23']

/DataAvailabilityModel/DAMNode[@id=‘463']

/DataAvailabilityModel/DAMNode[@id=‘321'] <ItemPath>/VirtualPatientData/VPDText[@id=‘6'] </ItemPath>

/DataAvailabilityModel/DAMNode[@id=‘321'] <ItemPath>/VirtualPatientData/VPDText[@id=‘6'] </ItemPath>

/DataAvailabilityModel/DAMNode[@id=‘321'] <ItemPath>/VirtualPatientData/VPDText[@id=‘6'] </ItemPath>

/DataAvailabilityModel/DAMNode[@id=‘321'] <ItemPath>/VirtualPatientData/VPDText[@id=‘6'] </ItemPath>

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Next Steps

Read the specifications and samples in the implementation toolkit: http://bit.ly/mbq_vp

Questions? Contact Valerie Smothers

vsmothers@jhmi.edu