Influence of Inhaled Anaesthetics on Rebreathing of Carbon Dioxide When Using an Anaesthesia Gas Reflector (AnaConDa)

Influence of Inhaled Anaesthetics on Rebreathing of Carbon Dioxide When Using an Anaesthesia Gas Reflector (AnaConDa)

The purpose is to investigate how the adsorptive capacity of the active carbon filter to carbon dioxide in an anaesthetic gas reflector (AnaConDa) is affected by adding inhaled anaesthetic agent.

The hypothesis is that addition of inhaled anaesthetic agent will affect the amount of adsorption of carbon dioxide to the active carbon and thereby affect rebreathing of carbon dioxide.

Inclusion Criteria:

• elective coronary artery by-pass graft surgery
• elective valve replacement surgery
• normal left ventricular ejection fraction on preoperative echocardiography

Exclusion Criteria:

• obstructive lung disease
• restrictive lung disease