OBJECTIVE: In cardiac surgery, insufflation of carbon dioxide is used for deairing of the heart and great vessels. The aim of this study was to assess a new insufflation device for efficient deairing and to study the influence of suction. METHODS: We measured the content of remaining air at two positions in the cardiothoracic wound model. A new insufflation device, a gas diffuser, was compared with a conventional 0.25-inch tube. Carbon dioxide flow (5 and 10 L/min) and suction (0, 1.5, 10, and 25 L/min) were varied. Suction was studied in combination with the gas diffuser. RESULTS: With the tube the median air content in the wound model was 19.5% to 51.7% at the studied carbon dioxide flows, whereas with the gas diffuser the median air content was no greater than 1.2% at 5 L/min and no greater than 0.31% at 10 L/min (P <.001). When suction of 1.5 L/min was applied, the median air content in the model remained low (<or =1.0%) at both carbon dioxide flows. With suction of 10 L/min the median air content was still low (<or =0.50%) at a simultaneous carbon dioxide flow of 10 L/min. Conversely, suction of 25 L/min caused a marked increase in air content at carbon dioxide flows of both 5 and 10 L/min (P <.001). CONCLUSIONS: This study demonstrated that the most efficient deairing (<or =1% remaining air) in a cardiothoracic wound model was provided by a gas diffuser at a carbon dioxide flow of 10 L/min. A conventional 0.25-inch tube failed to do so (19.5%-51.7% remaining air). Additional suction deteriorated air displacement with the gas diffuser when suction exceeded carbon dioxide inflow.
OBJECTIVE: In cardiac surgery, insufflation of carbon dioxide is used for deairing of the heart and great vessels. The aim of this study was to assess a new insufflation device for efficient deairing and to study the influence of suction. METHODS: We measured the content of remaining air at two positions in the cardiothoracic wound model. A new insufflation device, a gas diffuser, was compared with a conventional 0.25-inch tube. Carbon dioxide flow (5 and 10 L/min) and suction (0, 1.5, 10, and 25 L/min) were varied. Suction was studied in combination with the gas diffuser. RESULTS: With the tube the median air content in the wound model was 19.5% to 51.7% at the studied carbon dioxide flows, whereas with the gas diffuser the median air content was no greater than 1.2% at 5 L/min and no greater than 0.31% at 10 L/min (P <.001). When suction of 1.5 L/min was applied, the median air content in the model remained low (<or =1.0%) at both carbon dioxide flows. With suction of 10 L/min the median air content was still low (<or =0.50%) at a simultaneous carbon dioxide flow of 10 L/min. Conversely, suction of 25 L/min caused a marked increase in air content at carbon dioxide flows of both 5 and 10 L/min (P <.001). CONCLUSIONS: This study demonstrated that the most efficient deairing (<or =1% remaining air) in a cardiothoracic wound model was provided by a gas diffuser at a carbon dioxide flow of 10 L/min. A conventional 0.25-inch tube failed to do so (19.5%-51.7% remaining air). Additional suction deteriorated air displacement with the gas diffuser when suction exceeded carbon dioxide inflow.
Authors: Pierluigi Longatti; Elisabetta Marton; Alberto Feletti; Marco Falzarano; Giuseppe Canova; Carlo Sorbara Journal: Childs Nerv Syst Date: 2015-05-08 Impact factor: 1.475
Authors: Jean K Marshall; Pernilla Lindner; Noel Tait; Tracy Maddocks; Angelique Riepsamen; Jan van der Linden Journal: PLoS One Date: 2015-04-02 Impact factor: 3.240