Operation Room Laboratory - OR lab - Department of Energy and Process Engineering - NTNU
Operation Room Laboratory (OR lab)

The Operation Room Lab facilitates solutions for the operating room of the future, with new research and innovation on energy efficient indoor environment control technologies.
The OR laboratory research focuses on the following areas:
- Infection risk and control: This area investigates how airborne particles, microorganisms, and contaminants spread within the operating room. The research aims to understand transmission mechanisms and develop strategies to reduce infection risks for patients and surgical staff, such as optimizing ventilation systems and airflow patterns.
- Thermal comfort: This research examines how temperature, airflow, humidity, and radiant heat affect the comfort and performance of surgical staff while ensuring safe environmental conditions for patients. The goal is to balance staff comfort with strict clinical and hygiene requirements.
- Energy efficiency: This area focuses on reducing the energy consumption of operating room ventilation and climate control systems while maintaining safety, sterility, and comfort standards. The research explores improved system designs, smart control strategies, and sustainable operation methods.
Projects
Projects
- Human IC - Human Centric Indoor Climate for Healthcare Facilities - 2024-2027
- POSIred - Reduction of Post operative surgical site infections through development of XR tools - 2020-2024 - Download folder (PDF)
- Helse Midt-Norge Innovation project 2020-2021 - HMN-1784: Inneklima, pasientsikkerhet og arbeidsmiljø på operasjonsstua
- NTNU Discovery Hovedprosjekt 2019- 2020 – Condilight
Publications
Publications
- Cheng, Zhu; Cao, Guangyu; Aganovic, Amar; Li, Baizhan. (2020) Experimental study of the interaction between thermal plumes and human breathing in an undisturbed indoor environment. Energy and Buildings. vol. 207 (15).
- Langvatn, Håkon; Schrama, Johannes Cornelis; Cao, Guangyu; Hallan, Geir; Furnes, Ove; Lingass, Egil; Walenkamp, Geert; Engesæter, Lars Birger; Dale, Håvard. (2020) Operating room ventilation and the risk of revision due to infection after total hip arthroplasty: assessment of validated data in the Norwegian Arthroplasty Register. Journal of Hospital Infection.
- Aganovic, Amar; Cao, Guangyu. (2019) Evaluation of airborne contaminant exposure in a single-bed isolation ward equipped with a protected occupied zone ventilation system. Indoor and Built Environment. vol. 28 (8).
- Aganovic, Amar; Cao, Guangyu; Stenstad, Liv-Inger; Skogås, Jan Gunnar. (2019)An experimental study on the effects of positioning medical equipment on contaminant exposure of a patient in an operating room with unidirectional downflow. Building and Environment. vol. 165.
- Aganovic, Amar; Steffensen, Marie; Cao, Guangyu. (2019) CFD study of the air distribution and occupant draught sensation in a patient ward equipped with protected zone ventilation. Building and Environment. vol. 162.
- Cao, Guangyu; Nilssen, Anders Mostrøm; Cheng, Zhu; Stenstad, Liv-Inger; Radtke, Andreas; Skogås, Jan Gunnar. (2019) Laminar airflow and mixing ventilation: Which is better for operating room airflow distribution near an orthopedic surgical patient?. American Journal of Infection Control. vol. 47 (7).
- Cao, Guangyu; Nilssen, Anders Mostrøm; Mathisen, Hans Martin; Zhang, Yixian; Xue, Kai; Stenstad, Liv-Inger; Radtke, Andreas; Skogås, Jan Gunnar. (2019) Comparison of laminar and mixing airflow pattern in operating rooms of a Norwegian hospital. REHVA European HVAC Journal. vol. 57 (6).
- Pedersen, Christoffer; Cao, Guangyu; Drangsholt, Finn; Stenstad, Liv-Inger; Skogås, Jan Gunnar. (2019) Can we meet the requirement for ultra-clean operation room (10CFU/m3) with dilution ventilation?. E3S Web of Conferences. vol. 111.
- Zhang, Yixian; Feng, Guohui; Bi, Yang; Cai, Yilin; Zhang, Zheng; Cao, Guangyu. (2019) Distribution of droplet aerosols generated by mouth coughing and nosebreathing in an air-conditioned room. Sustainable cities and society. vol. 51.
- Cao, Guangyu; Storås, Madeleine C. A.; Aganovic, Amar; Stenstad, Liv-Inger; Skogås, Jan Gunnar. (2018) Do surgeons and surgical facilities disturb the clean air distribution close to a surgical patient in an orthopedic operating room with laminar airflow?. American Journal of Infection Control. vol. 46 (10).
- Aganovic, Amar; Cao, Guangyu; Stenstad, Liv-Inger; Skogås, Jan Gunnar. (2017)Impact of surgical lights on the velocity distribution and airborne contamination level in an operating room with laminar airflow system.Building and Environment. vol. 126.
My PhD: Energy and surgery

"The purpose of my PhD project is to explore energy-efficient distribution methods for indoor environment control and airflow, which enables a safe surgical microenvironment in operating rooms."
- Yang Bi, PhD candidate
Read the whole blog entry of PhD Candidate Yang Bi (in Norwegian).
Visiting Address:
Operating Room of the Future (FOR)
The OR Lab is part of Operating Room of the Future (FOR), an arena for research and development. FOR is a collaboration between St. Olavs Hospital and NTNU.

