An observational pilot study to determine the success rate of using LMA Proseal in conjuction with endobronchial blocker to provide one-lung anesthesia for thoracic surgery.

The use of LMA has gained popularity secondary to benefits confirmed by many literatures. However, LMA is rarely used in thoracic surgery. To enable one-lung ventilation, the LMA need to be used with bronchial blocker. The use of this combination has been reported as a rescue technique in special clinical scenarios, i.e. patient with difficult airway. When used in patient with difficult airway, the LMA will be inserted until proper ventilation achieved, then endobronchial blocker will be subsequently placed through the LMA into the selected main bronchus. The success rate of the the bronchial blocker placement via properly placed LMA has never been studied. This pilot study was designed to evaluate the success rate, the quality of lung collapsed, the dislodgement or other associated problems including some minor complications i.e. postoperative dysphagia, sore throat hoarseness of voice.

Inclusion Criteria:

• thoracic surgery that needed one-lung ventilation Exclusion Criteria:patient with
• Restrictive lung disease that needed positive pressure ventilation > 30 cm.H2O
• Mass or hematoma in the mouth which obstruct LMA insertion
• Emergency surgery
• Pregnancy
• Severe infection or active pulmaonary tuberculosis
• Hemoptysis
• Pulmonary nodule > 20 cm. or bronchilal pathology
• Pneumonectomy or sleeve resection

ASA class I-III patients age 18-75 years scheduled for thoracic surgery that required one-lung ventilation