The Application of Lung Ultrasound Combine With Diaphragm Ultrasound During Thoracic Surgery

Study Overview
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Brief Summary
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Perioperative lung-protective strategies had been advocated in one-lung ventilation but normal respiratory functions were yet impacted during videoassisted thoracoscopic(VATS) surgery. The primary aim of this study was to investigate respiratory complications after OLVby using bedside lung ultrasonography combine with diaphragmatic ultrasonography.

Detailed Description
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Perioperative lung-protective strategies had been advocated in One-lung Ventilation(OLV) of videoassisted thoracoscopic(VATS) surgery but normal respiratory functions were yet impacted during general anesthesia, mechanical ventilation, loss of respiratory muscle tone and intrathoracic surgery. Lung ultrasonography has been confirmed to be a available tool for rapid confirming atelectasis, pleural effusion , pneumonia and pneumothorax. Diaphragmatic excursion were well correlated with vital capacity by lung function testing and diaphragmatic ultrasound imaging was demonstrated accurately to identify atrophy and impaired contractility or motion of the diaphragm.The primary aim of this present study was to investigate respiratory complications after OLV in the postoperative period by using bedside lung ultrasonography.The secondary aim was to evaluate the variation of lung ventilation during thoracoscopic surgery through lung ultrasonography combine with diaphragm ultrasound and assess the accuracy of ultrasound to confirm proper endobronchial intubation.

Official Title
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The Perioperative Application of Lung Ultrasound Combine With Diaphragm Ultrasound In One-lung Ventilation During Thoracic Surgery

Conditions
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Videoassisted Thoracoscopic Surgery,One-lung Ventilation

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: scheduled for elective thoracoscopic surgery of OLV, over 18 years of age Exclusion Criteria: noncooperate from schizophrenia or delirium, a BMI higher than 40 kg/m2, a history of respiratory infection, a history of chronic obstructive pulmonary disease(COPD), a history of Chronic Heart Disease(CHD), received brachial plexus nerve block or general anesthesia within 2 weeks before surgery , received former thoracic procedures (e.g.,thoracotomy, thoracoscopy or thoracic drain)

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Rate of respiratory complications after one-lung ventiltion(OLV) in the postoperative period by using bedside lung ultrasonography |  | 15 minutes after tracheal extubation | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The variation of lung ventilation during thoracoscopic surgery through lung ultrasound combined with diaphragm ultrasound |  | before induction, 5 minutes after intubation, 5 minutes after surgery,15 minutes after tracheal extubation |