Abstract No. : ABS2870: Continuous positive airway pressure versus differential lung ventilation during one lung ventilation for thoracic surgery

BACKGROUND & AIMS: The primary objective of the study was to observe the changes in oxygenation, ventilation and the surgeons’ perception of the surgical field using continuous positive airway pressure (CPAP) or single lung ventilation (SLV) to the non-ventilated lung during the period of one lung ventilation (OLV) in patients undergoing thoracic surgery. METHODS: In this single centre study, each patient acted as his own control as well as the two study groups. Patient were crossed over from SLV to CPAP or vice versa with an interval period during which only OLV was used (control period). RESULTS: The study revealed that oxygenation was significantly better while using SLV to the non-ventilated lung during the period of OLV. However, the surgeon found significantly better surgical field when CPAP was applied. CONCLUSION: The study showed that using SLV to the non-ventilated lung during the period of OLV was superior in terms of oxygenation,although it interfered more with the surgical field.