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KMID : 1003820100140020075
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Journal Of The Korea Institute Of Oriental Medical Diagnostics
2010 Volume.14 No. 2 p.75 ~ p.84
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Gage R&R Study on Abdominal Sonography for Measuring Distance from Sangwan (CV13) to Pancreas
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Nam Dong-Hyun
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Abstract
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Objectives: The objective of the current study is to determine whether an ultrasound device system is adequate for measuring distance from Sangwan (CV13) to pancreas.
Methods: We recruited 3 healthy young male subjects and 2 sonographers. The each sonographer measured vertical shortest distance from CV13 to pancreas with a ultrasound device three times in random order. Because the total variation could be divided into repeatability, reproducibility and subject-to-subject variation in Gage R&R method, we compared the sources of variation associated with the measurement system with an analysis of variance model.
/Results & Conclusions: Number of distinct categories is calculated on the basis of standard deviation of subject-to-subject divided by standard deviation of total Gage R&R. If the number of categories is five or more, the measurement system may be acceptable for the analysis of the process. The number of distinct categories of the ultrasound device system for measuring distance from CV13 to pancreas was 6.29. So we concluded that repeatability and reproducibility of the ultrasound device system for measuring distance from CV13 to pancreas was acceptable.
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KEYWORD
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ultrasound device system, acupoint, safe depth, Gage R&R
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