1. Airflows and the spread of airborne pathogens in the ICU Dr Collette W
Airflows and the spread of airborne pathogens in the ICU Dr Collette W. Haig

2. Introduction Computational Fluid Dynamics (CFD) – an overview.
University Hospital Crosshouse.
The ICU.
Airflow patterns revealed.
Spread of airborne pathogens.
Conclusions.

3. CFD – an overview
CFD – enables solutions to be found to complex fluid mechanics problems using numerical methods.
Capable of modelling air flows and their interaction with surfaces.
Capable of modelling the transportation of particles and the effect of heat sources on air flow patterns.

4. The ICU at UHC

5. Airflow patterns

6. Airflow patterns

7. Airflow patterns

8. Airflow patterns

9. Airflow patterns

10. Airflow patterns

11. Pathogen spread – 4μm

12. Pathogen spread – 4μm

13. Pathogen spread – 4μm

14. Pathogen spread – 4μm

15. Pathogen spread – 4μm

16. Pathogen spread – 4μm

17. Pathogen spread – 4μm

18. Pathogen spread – 4μm

19. Conclusion CFD model of ICU at University Hospital Crosshouse.
Visualisation of airflow patterns and spread of respirable pathogens.
Even in this simple study great complexity is revealed.
Use of CFD to complement infection prevention studies.