Simulation of measurement devices in medical network

1. Simulation of measurement devices in medical network Author: Gonca Gurlek Instructor: Esa Osku Ilvonen, GE Heathcare Finland Supervisor: Prof. Jörg Ott

2. Outline of this presentation… • Objectives of the thesis • Problem statement and Motivation • Results • Conclusion

3. Objectives of the thesis • Analyzing problems with testing patient monitoring systems • Gases&Spirometry testing • A solution: Gas Module Simulator • Defining user and system requirement of the simulator • Identifying possible implementation ideas for the simulator

4. Gases and Spirometry testing It was estimated that we have spent 161 staff days testing gases and spirometry.

5. Motivation: What are the challenges in testing these parameters? • We need to use ventilators and Anaesthesia devices during tests and this leads to the following: • Testing Complexity • Unpredictable test execution times • Need for specially trained dedicated test engineers • Equipment Shortage • Difficulties in executing gas related tests by multiple testers at a time • False calibration of equipment • Inability to test parameter display ranges and certain extreme conditions

6. Solution: Gas Module Simulator • Goal: Reduce the total test execution time of gas and spirometry related tests therefore reduce the overall verification time. Overcome the challenges mentioned earlier. • Collect requirements from users • Document User and System Requirement Specifications • Analyze possible implementation methods for Gas Module Simulator

7. Gas Module Simulator - Requirements • The user requirements were collected from stakeholders involved: • Validation team, Parameters team, Monitoring SW teams, Marketing team, Gas Sensors team • Prioritize and document User Requirements • Define System Requirement Specifications

8. Gas Module Simulator – Implementation Ideas When evaluating the implementation ideas the following were considered: • The end result has to be applicable for official verification. • The simulator has to address the current problems related to the need of dedicated testers for gas and spirometry testing. • We should be able to apply some of the techniques or the knowledge from this experience to other future simulator projects. • It should give the possibility for tests to be easily automated in the future. • The simulator should require a simple test setup and configuration.

9. Gas Module Simulator Solution 1 • Using Windows version of the Spectrolite Software

10. Gas Module Simulator – Solution 2 • Simulating Host-Module communication

11. Gas Module Simulator – Solution 3 • Using ESP V2 Simulation

12. Gas Module Simulator – Solution 4 • Using the actual Gas Modules

13. Comparing Results

14. Conclusion – Chosen Method • Eventually, we decided go with a hardware approach , Solution 4. • Using a software only approach would be too risky and it cannot guarantee the same operation as the actual hardware. • By using the actual hardware of gas module and EMBC frame we avoid limitations and problems that could emerge by simulated or stubbed hardware and… • guarantee that the end result will be applicable for product verification and easier to validate.

15. Conclusion – Future improvements • Further effort is needed for implementing the Gas Module Simulator • Gas Module Simulator and will be first effort for simulating measurement devices , other measurement devices will be implemented. Neuro parameters such as EEG, Entropy Cardiac Output measurement