Abstract
Frequent observation of the fetal heart tones during the last part of the second stage of labor presents certain technical difficulties after the attendant is surgically prepared for the delivery. In breech labors in which the heart tones must be watched very carefully, it is always desirable and often necessary for the operator to observe the heart tones himself. In order to make this easily possible, an attachment for the stethoscope was devised which consists of a metal band such as is used on a head mirror, passing from front to back over the top of the head. The Y of the binaural stethoscope is fastened to the front plate of this band by means of a short spiral spring and a universal joint which is capable of being made rigid by a thumb screw. This permits proper adjustment of the ear pieces and holds the stethoscope in a position
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