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KMID : 0361819870060020126
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Journal of the Korean Society of Medical Ultrasound
1987 Volume.6 No. 2 p.126 ~ p.132
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Ultrasonographic Study on Kinetics of the Normal Gallbladder after ingestion of Regular Diet, Rice Gruel, and Orange Juice
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변재영/Byun, Jae Young
최일봉/박석희/신경섭/박용휘/Choi, Ihl Bohng/Park, Seog Hee/Shinn, Kyung Sub/Bahk, Yong Whee
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Abstract
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Ultrasonography is now widely used in examining the gallbladder (GB) because of its accuracy, noninvasiveness, and easy accessibility. Ultrasonography requires a period of fasting which is not always agreeable for a weakened patient. The authors, being interested in the indiscriminate use of this fasting period, attempted to establish judicial criteria of fasting by studying the contraction and relaxation of the GB after the ingestion of three different kinds of food.
Twenty healthy men aged twenties, with normal liver function tests and without gastrointestinal disorder, were selected for the study. After overnight fasting, an ultrasonographic examination of the GB was performed and the maximal surface area measured. After ingestion of a meal, the test was performed at 30-minute intervals for 31/2 hours to 41/2 hours and the maximal surface area was measured to calculate a contraction rate of the GB as expressed in terms of percentage cross-sectional area before and after the meal. Meals were of three different kinds: regular diet, rice gruel, and orange juice. The examination was repeated three times at 1-week intervals following the ingestion of different meal each time.
We compared contraction and relaxation of the GB after ingestion of each meal by surface area measurement and reached the following conclusions:
1. All three meals provoked contraction of GB, although intensity was different by the composition of the meals. Thus, a regular diet provoked a marked contraction of the GB, while rice gruel and orange juice a mild contraction.
2. The degree of contraction of the GB was not uniform in terms of time and varied markedly from subject to subject. The maximal contraction occurred at 90 minutes after regular diet and at 120 minutes after rice gruel, and at 30 minutes after orange juice.
3. After ingestion of the rice gruel and orange juice, the contraction rate did not exceed 50%. This study showed that rice gruel and orange juice do not cause significant contraction of the GB. Therefore, it is concluded that there is no need of strict fasting prior to a US examination of the GB as far as rice gruel and orange juice ingested.
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