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Vital Signs Alarm System

Vital Signs Alarm System. Af Søren Gørtz Olesen Jonas Hove Jakobsen. Indhold i præsentationen. 2. Systemoversigt Krav til systemet Klassediagram Udvalgt VDM++ eksempel. Systemoversigt. Overvåger livstegn. Sekundær læge. Patient. Primær læge. Krav til systemet (1).

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Vital Signs Alarm System

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  1. Vital SignsAlarm System Af Søren Gørtz Olesen Jonas Hove Jakobsen

  2. Indhold i præsentationen 2 Systemoversigt Krav til systemet Klassediagram Udvalgt VDM++ eksempel

  3. Systemoversigt Overvåger livstegn Sekundær læge Patient Primær læge

  4. Krav til systemet (1) • Systemet skal kunne overvåge livstegn fra en patient og alarmere ved overskridelse af grænseværdier. • Livstegnene består af puls, EKG, åndedræt, blodtryk og temperatur. • En alarm skal indeholde informationer om hvilket/hvilke livstegn der er kritiske, hvor meget grænseværdien er overskredet og hvor lang tid den har været overskredet. • Hvis grænseværdien for et livstegn overskrides i 15 sek. skal en alarm genereres hos første prioriterede læge. Lægen skal kvittere for alarmen inden 30 sek. ellers skal alarmen videresendes til anden prioriterede læge.

  5. Krav til systemet (2) • Hvis ingen læge har kvitteret for alarmen indenfor 60 sek. skal en fællesalarm lyde hos alle afdelingens læger. • Alarmgrænseværdierne og tidsgrænser skal kunne indstilles individuelt for hver patient. • En prioriteringsrækkefølge af læger skal kunne tilknyttes en patient. En patient skal have tilknyttet minimum en første og en anden prioritet. • En læge skal kunne afmelde sig alarmhåndtering, så alarmer videresendes til den næste læge i prioriteringsrækkefølgen. Fællesalarmer skal lyde under alle omstændigheder.

  6. Indhold i præsentationen • Systemoversigt • Krav til systemet • Klassediagram • Udvalgt VDM++ eksempel √ √

  7. Klassediagram (1) Alarmsystemet Eksisterende system World/Environment

  8. Klassediagram (2) Det eksisterende overvågningssystem

  9. Klassediagram (3) 9

  10. Klassediagram (4) World/Environment

  11. Klassediagram (5) 11

  12. Klassediagram (6) Alarmsystem

  13. Indhold i præsentationen 13 √ √ √ Systemoversigt Krav til systemet Klassediagram Udvalgt VDM++ eksempel

  14. Udvalgt VDM++ eksempel Hospitalsklassen 14 class Hospital types public CPRNo = int; public String = seq of char; instance variables public static doctors : set of Doctor; public static patientAlarmInfoMap : map CPRNo to PatientAlarmInfo; public static patientMap : map CPRNo to Patient; private vitalSignSurveillanceSystem : VitalSignSurveillanceSystem; public static alarmSystem : AlarmSystem; inv dom patientAlarmInfoMap = dom patientMap; operations public Hospital : () ==> Hospital Hospital() == is not yet specified; end Hospital

  15. Indhold i præsentationen 15 √ √ √ √ Systemoversigt Krav til systemet Klassediagram Udvalgt VDM++ eksempel Udvalgt funktionalitet fra modellen Test af modellen

  16. Funktionalitet fra modellen (1)

  17. Funktionalitet fra modellen (2) AlarmSystem – checkForAlarm() 17 public checkForAlarm : Hospital`CPRNo ==> () checkForAlarm(PatientCPRNo) == ( let vitalSigns = Hospital`patientMap(PatientCPRNo).getCurrentVitalSigns(), thresholds = Hospital`patientAlarmInfoMap(PatientCPRNo).getThresholds() in let criticalVitalSigns = {mk_AlarmVitalSign(v.type, v.val, t.val) | v in set vitalSigns, t in set thresholds & v.type = t.type and v.val > t.val} in ( if card criticalVitalSigns > 0 and (not exists a in set alarms & a.getPatientcprno() = PatientCPRNo) then ( dcl alarm :Alarm := new Alarm(PatientCPRNo, criticalVitalSigns); alarms := alarms union {alarm}; let doctor = alarm.findNextDoctor() in if doctor <> nil then doctor.alarmDoctor(alarm) else alarmAllDoctors(alarm); ) ) ) pre {v.type | v in set Hospital`patientMap(PatientCPRNo).getCurrentVitalSigns()} = {t.type | t in set Hospital`patientAlarmInfoMap(PatientCPRNo).getThresholds()};

  18. Funktionalitet fra modellen (3) AlarmSystem – step() 18 public step : () ==> () step() == ( for all a in set {al | al in set alarms & not al.isFinished()} do if a.checkForDoctorTimeOut() then let doctor = a.findNextDoctor() in if doctor <> nil then ( a.setStartTime(World`timeNotionRef.getTime()); doctor.alarmDoctor(a); ) else alarmAllDoctors(a); );

  19. Funktionalitet fra modellen (4) Alarm – checkForDoctorTimeOut() 19 public checkForDoctorTimeOut : () ==> bool checkForDoctorTimeOut() == ( if not accepted then return World`timeNotionRef.getTime() > Hospital`alarmSystem.doctorAlarmTimeOut + startTime else return false; );

  20. Funktionalitet fra modellen (5) Alarm – findNextDoctor() 20 public findNextDoctor : () ==> [Doctor] findNextDoctor() == ( doctorPriority := doctorPriority + 1; if doctorPriority > len (Hospital`patientAlarmInfoMap(patientcprno).getResponsibleDoctors()) then return nil else let respDoctors = Hospital`patientAlarmInfoMap(patientcprno).getResponsibleDoctors()in ( if respDoctors(doctorPriority).getAvailability() = false then findNextDoctor() else return respDoctors(doctorPriority); ) );

  21. Indhold i præsentationen 21 √ √ √ √ √ Systemoversigt Krav til systemet Klassediagram Udvalgt VDM++ eksempel Udvalgt funktionalitet fra modellen Test af modellen

  22. Test af modellen (1) Test – instance variables og print() 22 class Test instance variables io : IO := new IO(); public hospital : Hospital := new Hospital(); d1 : Doctor := new Doctor("Soren", 1); d2 : Doctor := new Doctor("Jones", 2); p1 : Patient := new Patient("Jonas Hove", {<HeartRate>,<Temperature>}); v1 : Patient`VitalSign := mk_Patient`VitalSign(<HeartRate>, 130); v2 : Patient`VitalSign := mk_Patient`VitalSign(<Temperature>, 39); pai1 : PatientAlarmInfo := new PatientAlarmInfo([d1, d2], {v1, v2}); operations public static print : seq of char ==> () print(str) == def - = io.writeval[seq of char](str) in skip;

  23. Test af modellen (2) Test – Constructor 23 public Test : () ==> Test Test() == ( hospital.init({d1, d2},{2803831915 |-> pai1}, {2803831915 |-> p1}); p1.setCurrentVitalSign(mk_Patient`VitalSign(<HeartRate>, 140)); hospital.vitalSignSurveillanceSystem.step(); print("Number of alarms: " ^ [Hospital`alarmSystem.numOfAlarms()]); Hospital`alarmSystem.step(); World‘timeNotionRef.stepTime(); ); end Test

  24. Indhold i præsentationen 24 √ √ √ √ √ √ Systemoversigt Krav til systemet Klassediagram Udvalgt VDM++ eksempel Udvalgt funktionalitet fra modellen Test af modellen

  25. Environment 1/2 class Environment … operations public Environment : String * String ==> Environment Environment(patientFile, doctorFile) == ( def mk_ (-,input) = io.freadval[seq of Patientline](patientFile) in inlinesPatient := input; def mk_ (-,input) = io.freadval[seq of Doctorline](doctorFile) in inlinesDoctor := input; hospital := new Hospital(); ); public run : () ==> () run () == ( while not (isFinished() and Hospital`alarmSystem.isFinished()) do ( createSignal(); hospital.vitalSignSurveillanceSystem.step(); Hospital`alarmSystem.step(); World‘timeNotionRef.stepTime(); ); showResult() ); … end Environment 25

  26. Environment 2/2 class Environment … private createSignal: () ==> () createSignal () == ( dcl curtime : nat := World‘timeNotionRef.getTime(); if len inlinesDoctor > 0 then ( def mk_(doctorID, patientCPRNo, accept, deactivate, runtime) = hd inlinesDoctor in if runtime <= curtime then ( if accept = true then doctorIO.acceptAlarm(doctorID, patientCPRNo); if deactivate = true then doctorIO.deactivateAlarm(doctorID, patientCPRNo); inlinesDoctor := tl inlinesDoctor; ) ); if len inlinesPatient > 0 then ( def mk_(patientCPRNo, vitalSigns, runtime) = hd inlinesPatient in if runtime <= curtime then ( patientIO.setVitalSigns(vitalSigns, patientCPRNo); inlinesPatient := tl inlinesPatient; ) ) ); … end Environment 26

  27. Hospital class Hospital … operations public init : set of Doctor * map CPRNo to PatientAlarmInfo * map CPRNo to Patient ==> () init(docs, paiMap, pMap) == ( doctors := docs; atomic ( patientAlarmInfoMap := paiMap; patientMap := pMap; ); vitalSignSurveillanceSystem.init(pMap); ); public Hospital : () ==> Hospital Hospital() == vitalSignSurveillanceSystem := new VitalSignSurveillanceSystem(); … end Hospital 27

  28. Doctor class Doctor … operations public getID : () ==> int getID() == return doctorID; public alarmDoctor : Alarm ==> () alarmDoctor(alarm) == World`env.handleEvent(doctorName, alarm.getPatientcprno()); public acceptAlarm : Hospital`CPRNo ==> () acceptAlarm(cprno) == available := not (Hospital`alarmSystem.acceptAlarm(cprno)); public deactivateAlarm : Hospital`CPRNo ==> () deactivateAlarm(cprno) == ( Hospital`alarmSystem.deactivateAlarm(cprno); available := true; ); end Doctor 28

  29. VitalSignSurveillanceSystem class VitalSignSurveillanceSystem instance variables public patientMap : map Hospital`CPRNo to Patient; inv dom patientMap = dom Hospital`patientMap; operations public step : () ==> () step() == monitorPatients(); public monitorPatients : () ==> () monitorPatients() == for all cprno in set dom patientMap do Hospital`alarmSystem.checkForAlarm(cprno); public init : map Hospital`CPRNo to Patient ==> () init(patMap) == patientMap := patMap; end VitalSignSurveillanceSystem 29

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