1. Learning Curve Analysis on Measurement of Fetal Nasal Bone in the Mid-pregnancy.
- Author
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XU Jing, YANG Xin, CHEN Min, ZHANG Lan, XIAO Xue, QIAN Yuan, GUO Zhi, and MA Run-mei
- Subjects
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NASAL bone , *DIAGNOSIS of Down syndrome , *PREGNANCY , *THERAPEUTIC use of ultrasonic imaging , *FETAL ultrasonic imaging , *MEDICAL screening - Abstract
Objective Establish a set of effective measuring NBL training strategy, preliminarily master the number of cases needed in the NBL measure plane through the learning curve drawing. Methods A total of 160 cases of fetal head of three-dimensional volume included in this study. 20 cases were used to training eight trainees, 20 cases were used to measure NBL, 20 cases from the rest 120 cases were randomly selected for the trainees standard plane test, and retest again until all trainees passed if test failed. All the measurement results of trainees were statistically analyzed. Results In the first set of test results, eight trainees have not been successful to get all the 20 cases plane, the average trainee measuring 4-9 cases of failure. In subsequent tests, with the increase of test cycle, each trainee's failure gradually reduced, all 8 trainees passed test in the 7th group. 8 trainees needed an average of 90 cases (60-140) for successful completion of the test. Conclusion Nasal bone measurement is an important ultrasound index in fetal down syndrome screening. Systemic and standard ultrasonic training is the guarantee of the accuracy of the measurement. [ABSTRACT FROM AUTHOR]
- Published
- 2015