اندازه گيري قطر مجراي مشترك صفراوي در بالغين سالم با سونوگرافي

ULTRASOUND MEASUREMENT OF COMMON BILE DUCT DIAMETER IN NORMAL ADULTS

Background & Aim: Biliary tract diseases are common and one of their major signs is making change in diameter of the biliary ducts. To interpret this sign correctly, it is mandatory to know the mean and normal range of the diameter. The main goal of this study was to establish the mean and normal range of diameter of Common Bile duct(CBD) in adults by sonography. The minor purposes were to determine if there is correlation between the diameter of CBD and body parameters such as age, weight, height of subjects and asses whether a significant difference exists between the established total mean by this study and the literature; and also between the means of CBD diameter of male and female groups. Materials and Methods: By a prospective study the CBD diameter of 106 adults aged between 18 and 60 measured by sonography. All persons included in study were referred to sonography department of Imam Khomeini Hospital (Tabriz) and had not complained, pertaining to hepatobiliary tract. Results: The established mean and 95% confidence levels are 3.82.26 mm. There is no significant difference between this mean and the mentioned mean in majority of the literature (4 mm), p>0.05. Between means of females and males also doesnʹt exist a significant difference (p> 0.05). There is positive correlation between CBD diameter and weight and age parameters. Discussion: In daily practice of clinical sonography, we can refer to these data and differentiate normal from abnormal subjects. Our study is an observational type and cannot display a causative relationship.