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The oral method of carrying out the Graham-Cole test is reliable, and is capable of giving a correct indication as to whether the gall-bladder is normal or pathological in 93% of cases.
Except in the case of visualized stones it is not possible by means of this test to give a precise diagnosis. Different surgical conditions will produce similarx-ray appearances, and therefore in the “no shadow, faint shadow and late appearance cases” one is only justified in saying that the gall-bladder is pathological.
The success of the method depends upon the most careful attention to details in preparation and to correct radiograph technique.
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