Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Infections
Abstract number: 25967
NEW RESEARCH IN SAFETY VENTILATION EMPLOYED IN A MODULAR
ULTRA CLEAN OPERATING THEATRE
Ingrid EKENMAN 1 , Johan NORDENADLER 2
1 Karolinska Institut, Stockholm (SWEDEN), 2 Royal Institut of Technology, Building
Science, Stockholm (SWEDEN)
Results from three studies at Building Sciences, KTH have been employed in a
modular operating theatre which gets emphasises in patient safety, cost-and energy
effective installations and quality assurance Challenge tests (LR-method),
microbiological tests and air velocity tests in field studies in three different operating
rooms has been performed. Data from a KTH study on clothing system performace
and data on the concentrations of viable particles in the operating rooms during
ongoing operations from four county councils have been used in this study Results
shows that supply air systems providingunidirectional air flow, often called LAFsystems,
today often installedwith an air supply velocity below 0.3 m/s, the air flow
pattern above theoperating table occurs in a disordered manner, which resembles
that of atotal mixing air flow. This means that new, more cost-effective, air
supplysystems can be used by using ordinary total mixing air flow in
ortopaedicsurgery. A simple mathematical expression has been developed topredict
the concentration of airborne viable particles present in theoperating room. This
expression is based upon thedilution principle. New research in safety ventilation has
made it possible to construct a modular, ISO-class, operating theatre with top patient
safety and cost-effective ultra clean airflow for orthopaedic surgery. References:
Ljungqvist, B., Reinmüller, B. (2006), Practical Safety Ventilation in Pharmaceutical
and Biotech Cleanrooms, PDA, Bethesda, MD, DHI Publishing, LLC, River Grove,
IL.Nordenadler, J, (2008), Skyddsventilation i operationsrum, Licentiatarbete i
installationsteknik, meddelande nr 71, KTH, Stockholm.
309