The problems of digestion in infancy and early childhood have engaged the attention of pediatricians for a long time, and our literature is filled with discussions as to the digestive activities, possibilities and difficulties in early life. A method of study which approaches the subject from a new view-point should, therefore, have a certain justification. It seemed to me that the bead test, as originally devised by Einhorn, might be a valuable method of direct clinical study. This test was proposed originally for adults, but the feasibility of its use for children struck me. Once engaged on the study of this test, the possibility of its application to very young children, indeed to new-born infants, was apparent, provided that certain difficulties of technic could be overcome. By the procedure about to be described, it was found to be very easy to apply the test to infants of any age. A
FRIEDLANDER A. STUDIES IN INFANTILE DIGESTION.. JAMA. 1908;LI(25):2125–2130. doi:10.1001/jama.1908.25410250025001e
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