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Scope and VisionScope and Vision

PhoenixPhoenix

Ambulatory Blood Pressure Ambulatory Blood Pressure Monitoring SystemMonitoring System

© 2009 Christopher J. Adams

This work is licensed under the Creative Commons Attribution 3.0 Unported License.To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/ or send a letter to

Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.

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Table of ContentsTable of Contents

I.I. MissionMissionII.II. ScopeScopeIII.III. StakeholdersStakeholdersIV.IV. Goals & Goal Goals & Goal

ConflictsConflictsV.V. DictionaryDictionaryVI.VI. Scenarios, Stories, Scenarios, Stories,

Use Cases & Use Cases & ExceptionsExceptions

VII.VII. RequirementsRequirements

VIII.VIII. JustificationsJustifications

IX.IX. AssumptionsAssumptions

X.X. Agreed PrioritiesAgreed Priorities

XI.XI. Acceptance CriteriaAcceptance Criteria

XII.XII. Parking LotParking Lot

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MissionMission

Develop an ambulatory blood pressure monitorDevelop an ambulatory blood pressure monitor– InexpensiveInexpensive– UnobtrusiveUnobtrusive– Easy to useEasy to use– Collects a week of blood pressure measurementsCollects a week of blood pressure measurements

Develop a means for chronobiological analysis of Develop a means for chronobiological analysis of the collected blood pressure measurementsthe collected blood pressure measurements

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MissionMission

Be a learning communityBe a learning community– IEEE study groupIEEE study group– Open sourceOpen source

Deliver the monitor and analytic framework to the Halberg Deliver the monitor and analytic framework to the Halberg Chronobiology CenterChronobiology Center– For long term use on massive scale toFor long term use on massive scale to

Obtain measures of healthObtain measures of health Encourage the development of techniques forEncourage the development of techniques for

– DiagnosisDiagnosis– PreventionPrevention– TreatmentTreatment

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ScopeScope

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ScopeScope

System measures the WearerSystem measures the Wearer Wearer records observations in the DiaryWearer records observations in the Diary Provider assesses the data collected by the SystemProvider assesses the data collected by the System Physiologist models blood pressure profiles needed by the assessment methodsPhysiologist models blood pressure profiles needed by the assessment methods Diary influences the interpretation of the dataDiary influences the interpretation of the data Wearer optionally tracks results in a Personal Health Record SystemWearer optionally tracks results in a Personal Health Record System Clinical settings Clinical settings data stored in Medical Record System data stored in Medical Record System Wearer de-identified to assure privacy Wearer de-identified to assure privacy Person Identification System Person Identification System

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StakeholdersStakeholdersActorsActors

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StakeholdersStakeholders

http://www.phoenix.tc-ieee.org/http://www.phoenix.tc-ieee.org/014_Systems_Architecture_and_Engineerin014_Systems_Architecture_and_Engineerin

g/all-in-one.html#requirementsg/all-in-one.html#requirements

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Goals & Goal ConflictsGoals & Goal Conflicts

Make a monitor that isMake a monitor that is– InexpensiveInexpensive– UnobtrusiveUnobtrusive– Easy to useEasy to use– Collects a week of blood pressure measurementsCollects a week of blood pressure measurements

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Goals & Goal ConflictsGoals & Goal Conflicts

InexpensiveInexpensive– Price not a barrier to usePrice not a barrier to use– Less expensive than blood pressure cuffLess expensive than blood pressure cuff– Less expensive than wrist watchLess expensive than wrist watch

< US$50< US$50

– Less expensive than “two bushels of yams”Less expensive than “two bushels of yams” Third-world friendlyThird-world friendly < US$10< US$10

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Goals & Goal ConflictsGoals & Goal Conflicts UnobtrusiveUnobtrusive

– When wearing monitor, patient can When wearing monitor, patient can Forget about, be unaware of deviceForget about, be unaware of device

– No more encumbering thanNo more encumbering than Wrist watchWrist watch Band-aid™Band-aid™ Piece of jewelryPiece of jewelry

– Usable wherever the patient isUsable wherever the patient is At homeAt home At work when allowedAt work when allowed Not only at hospital, clinic or doctor's officeNot only at hospital, clinic or doctor's office

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Goals & Goal ConflictsGoals & Goal Conflicts Easy to useEasy to use

– Easier to use than current:Easier to use than current: Blood pressure cuffsBlood pressure cuffs Home BP monitorsHome BP monitors

– Patient can:Patient can: Ignore deviceIgnore device Determine that device is functioning normallyDetermine that device is functioning normally Observe a blood pressure and heart rate measurementObserve a blood pressure and heart rate measurement

– DeviceDevice Is automaticIs automatic

– measurements taken regardless of patient behaviormeasurements taken regardless of patient behavior Allows manually initiated measurementsAllows manually initiated measurements

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Goals & Goal ConflictsGoals & Goal Conflicts

– Must measureMust measure Systolic and diastolic blood Systolic and diastolic blood

pressurepressure Heart rateHeart rate

– At least as accurate as current:At least as accurate as current: Blood pressure cuffsBlood pressure cuffs Home blood pressure Home blood pressure

monitorsmonitors

– Would also like to measureWould also like to measure Physical activityPhysical activity

– To determine if vigorous To determine if vigorous body movement, such as body movement, such as physical exercise, physical exercise, influenced the blood influenced the blood pressure measurementpressure measurement

Blood flowBlood flow

– Records measurementsRecords measurements at least every half hourat least every half hour for at least 7 daysfor at least 7 days

Collects a week of blood pressure measurementsCollects a week of blood pressure measurements

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Goals & Goal ConflictsGoals & Goal Conflicts

The Halberg Chronobiology Center wants the monitorThe Halberg Chronobiology Center wants the monitor– For long term use on massive scaleFor long term use on massive scale– To obtain measures of healthTo obtain measures of health– To encourage the development of diagnostic, prevention and To encourage the development of diagnostic, prevention and

treatment techniquestreatment techniques