Learning Curve of Aortic Arch Replacement Surgery in Chinese Mainland With Stanford Type A Aortic Dissection

Study Overview
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Brief Summary
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stanford type A aortic dissection is the most common cause of death caused by aortic disease in Chinese mainland. Patients who are hospitalized need immediate surgical treatment.Emergency aortic arch replacement is difficult and risky. Different surgical methods have different effects on postoperative prognosis. Aortic arch replacement is divided into total-arch replacement (Sun's operation) and hemi-arch replacement. In this study, and the learning Curve of Aortic Arch Replacement Surgery was evaluated with cumulative cum curve.

Official Title
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Using CUSUM to Analyze the Learning Curve of Aortic Arch Replacement Surgery in Chinese Mainland With Stanford Type A Aortic Dissection

Conditions
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Cumulative Sum Learning Curves, Stanford Type A Aorta Dissection

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: age over 18 years who underwent surgery for stanford type A aorta dissection without concurrent cardiac Surgery Exclusion Criteria: data miss greater than 10%

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 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 |
| --- | --- | --- |
| Cardiopulmonary bypass (CPB) time | Cardiopulmonary bypass (CPB) time was used as the main variables for evaluation and visualization of the aorta dissection surgery learning curve using Cumulative sum.Cumulative sum (CUSUM) is a statistical method that focuses on results rather than on the process of performing a program skills, it generates graphs that allow for quick detection of deviations from pre-established standards and is an alternative tool that can be used to evaluate the performance of individual program. CUSUM can be generated based on set acceptable and unacceptable failure rates and the degree to which type 1(α) and type 2(β) errors (false positive and false negative errors) will be tolerated. CUSUM was defined as Sn = ∑(Xi -p0), where Xi = 0 for success and Xi = 1 for failure, p0 is the target reference. | Intra-operative | 
| Aortic clamping (AC) time | Aortic clamping (AC) time was used as the main variables for evaluation and visualization of the aorta dissection surgery learning curve using Cumulative sum.Cumulative sum (CUSUM) is a statistical method that focuses on results rather than on the process of performing a program skills, it generates graphs that allow for quick detection of deviations from pre-established standards and is an alternative tool that can be used to evaluate the performance of individual program. CUSUM can be generated based on set acceptable and unacceptable failure rates and the degree to which type 1(α) and type 2(β) errors (false positive and false negative errors) will be tolerated. CUSUM was defined as Sn = ∑(Xi -p0), where Xi = 0 for success and Xi = 1 for failure, p0 is the target reference. | Intra-operative |