Total intravenous anaesthesia (TIVA) When TIVA is used there must be a continuous intravenous infusion of anaesthetic agent or agents; interruption from whatever cause may result in awareness. A thorough equipment check is therefore the most important step in reducing the incidence of awareness. Anaesthetists using TIVA must be familiar with the drugs, the technique and all equipment and disposables being used. The Safe Anaesthesia Liaison Group (SALG) has produced safety guidance on guaranteeing drug delivery during TIVA [16]; SALG made the following recommendations