Anesthetic Experience for Main Bronchus Rupture after Blunt Chest Trauma: A case report / 대한마취과학회지

Tracheobronchial injury is a rare but potentially fatal complication of blunt chest trauma. Delays in diagnosis may occur because the signs are nonspecific and these injuries are infrequent. This case report describes a patient who experienced blunt chest injury with a resulting left main bronchus rupture that was not initially diagnosed. The most challenging aspect of reconstruction surgery for tracheobronchial rupture is to design an effective ventilation method during operation that does not interfere with surgical exposure and allows adequate ventilation. Communication with the surgical team and careful planning of all surgical details are important. We review our experience, the ventilation technique and anesthetic problem encountered in the patient undergoing bronchial reconstruction.

The Comparison of Pulmonary Shunt and Arterial Oxygenation between Right and Left One Lung Ventilation in Patients with Normal Lung / 대한마취과학회지

BACKGROUND: The extent of disease in the nonventilated lung is a major determinant of the amount of blood flow to the nonventilated lung during one lung anesthesia. Collapse of a normal lung may be associated with a higher nonventilated lung blood flow and pulmonary shunt. The aim of this study was to compare the difference of pulmonary shunt and arterial oxygenation between right and left one lung ventilation in patients with normal lung in the supine position. METHODS: 50 patients for bilateral thoracic sympathectomy in the supine position were selected. Patient's data (MAP, HR, PaO2, and shunt) were collected and calculated after left lung ventilation (LLV) with 50% and 100% oxygen (20 minutes interval), and after right lung ventilation (RLV) as same method. Patient,s data were compared between left and right lung ventilation. RESULTS: Under 50% oxygen, PaO2 by LLV (78.0 +/- 12.0 mmHg) was lower than PaO2 by RLV (107.7 +/- 27.9 mmHg) and pulmonary shunt by LLV (28.0 +/- 4.8%) was higher than pulmonary shunt by RLV (22.0 +/- 5.7%). Under 100% oxygen, PaO2 by LLV (143.2 +/- 28.5 mmHg) was lower than PaO2 by RLV (201.1 +/- 3.6 mmHg) and pulmonary shunt by LLV (29.7 +/- 2.5%) was higher than pulmonary shunt by RLV (25.8 +/- 2.7%). CONLUSION: Under 50% oxygen, left lung ventilation in patient with normal lung has higher risk of hypoxemia compared to right lung ventilation during one lung anesthesia in the supine position.

Anesthesia in Patient with Bronchopleural Fistula: A case report / 대한마취과학회지

Bronchopleural fistula is an uncommon but serious complication of lung resection, with a high mortality and morbidity. Problems associated with bronchopleural fistula and empyema are related to positive-pressure ventilation, which may result in infectious contamination of healthy lung tissue, loss of air, decreased alveolar ventilation leading to carbon dioxide retention, and the development of a tension pneumothorax. We experienced difficult intubation in patient who has large bronchopleural fistula and anatomic deviations of intact bronchus of the left lung, so we used a long single lumen tube made by attaching an another cuffed endotracheal tube under direct vision. The arterial oxygenation was effective, but carbon dioxide elimination was inadequate. After the operation, the ordinary cuffed endotracheal tube was intubated orally and the patient was transferred to the ward without problems 6 days after the operation.

Is There Any Difference in Arterial Oxygenation between the Right and Left Thoracic Surgery under the Different One Lung Ventilation Mode? / 대한마취과학회지

BACKGROUND: Use of one lung anesthesia for thoracic surgery may compromize PaO2. The aim of this study was to compare the shunt and oxygenation effects of the application of CPAP and CPAP/PEEP between right and left thoracic surgery under one lung anesthesia. METHODS: 10 patients for right thoracic surgery were selected as group 1, and 10 patients for left thoracic surgery were selected as group 2. Measurements in each group, were made during each of the following stage. First 30 minutes, One lung anesthesia alone with 50% oxygen (control value), next 30 minutes, CPAP 10 cmH2O to upper lung with 50% oxygen (CPAP), and then CPAP 10 cmH2O to upper lung and PEEP 10 cmH2O to down lung with 50% oxygen for 30 minutes (CPAP/PEEP). RESULTS: PaO2 in CPAP and CPAP/PEEP were significantly increased as compare to control value at both group (P<0.05). Shunt percentage in CPAP and CPAP/PEEP were significantly decreased as compare to control value at both group (P<0.05). But, no statistically significant differences were observed between right and left thoracic surgery group in the PaO2 and shunt percentage. CONCLUSIONS: We confirmed that CPAP and CPAP/PEEP during one lung ventilation is thought to be effective method in preventing hypoxemia, but no differences were observed between right and left thoracic surgery group.

Bronchial Cuff Inflation Technique for Proper Positioning of Double-lumen Endobronchial Tube / 대한마취과학회지

BACKGROUND: Accurate placement of double-lumen endobronchial tube(DLT) is essential for successful one-lung anesthesia. This study was performed to evaluate the effectiveness of bronchial cuff inflation technique for accurate placement of DLT. METHODS: One hundred and five patients undergoing elective thoracotomy which required the use of DLTs were studied. Following induction of anesthesia, the tip of the left-sided DLT was advanced just past the vocal cords, the stylet in the endobronchial lumen was removed and the tube was rotated 90 degrees counterclockwise. After rotation of DLT, the bronchial cuff was inflated with air(4-6 ml) and the tube was advanced until resistance to further passage was encountered. After deflating of the bronchial cuff, the tube was advanced 2 cm more distally. The fiberoptic bronchoscopy was then introduced into the tracheal lumen of the tube and the tube's position was evaluated. RESULTS: In the 100 patients out of 105 patients, the tube was inserted into the left side bronchus correctly. In the 77 patients(77 %) out of 100 patients, the position of DLTs was evaluated as ideally placed. In the 16 patients(16 %), the tube was evaluated as too deeply inserted into the appropriate bronchus and in the other 7 patients, the tube was too shallow. But only one patient needed repositioning. CONCLUSIONS: Bronchial cuff inflation technique may be useful for accurate placement of DLT for the one-lung anesthesia in the situation without fiberoptic bronchoscope.