Improving ventilation hygiene in wards for immunocompromised patients: a workflow comparison of traditional and innovative duct cleaning methods.

Introduction: For a vulnerable hospital population, hospital ventilation systems can pose a risk if not maintained correctly. Dust accumulation in air ducts can create environments that allow fungal spores, such as Methods: We conducted a comparative evaluation of ventilation duct cleaning in adjacent hospital rooms. In one room, the ducts were accessed from within the room using a traditional brushing method, while in the other room, the ducts were primarily accessed from outside using a novel method including the use of newly developed low speed brushes and point extraction of debris. Air quality was monitored by counting particles every 15 minutes in 100-liter samples using a calibrated air sampler and collecting microbiological specimens before and after the cleaning process. Results: In-room cleaning caused a significant spike in airborne particles of all sizes, along with a modest increase in Conclusion: These findings highlight the risks associated with internal duct cleaning, especially for patients who are vulnerable to airborne fungal infections. External duct access proves to be a safer alternative, ensuring minimal disruption to the air quality in patient care areas. This study supports the necessity of strategic planning in hospital ventilation maintenance to protect vulnerable populations.