Bacterial Air Contamination

Aim is to compare the effect of number of persons and time-dependant bacterial air contamination on sterile goods, using different preparation conditions and protective sterile covers.Research questions Is there a difference in bacterial air contamination during preparation of the sterile surgical goods with 2 persons (intervention) compared with 4-5 persons (control) in the OR? Is there a time-dependent difference in bacterial air contamination pending surgery for 1 hour (control) compared to approximately 12 hours (intervention) when the sterile goods are protected with sterile covers? Is there a time-dependent difference in bacterial air contamination pending surgery if sterile goods are protected or not, by sterile covers? Is there any differences in surgical site infections between the groups? What type of bacteria contain the air contamination? Is there antibiotic resistant bacterial air contamination?

Inclusion Criteria:Consecutive patients (n=70) undergoing cardiac surgery at the Department of Cardiothoracic and Vascular Surgery at Örebro University Hospital (ÖUH), Region Örebro County will be identified. Inclusion criteria: patients undergoing cardiac surgery by median sternotomy; coronary artery bypass grafting (CABG), aneurysm, valve replacement or combination surgery.Exclusion Criteria:Patients where partial thoracotomy or endovascular procedures are performed. Patients with infection and procedures as infective endocarditis. No research nurse available.