tion of exúdate in the right lower part of the pericardium is usually small in comparison. This would seem sufficient reason for not choosing the fifth right intercostal space (Rotch's Point) as the site for paracentesis. Likewise for the same reason the various points to the left of the sternal border, either inside or outside the internal mammary artery, are unsuitable. Furthermore, the dangers of wounding the heart are greatly increased in this region. The region most commonly chosen

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... ann, Zinn, West, Sears, and many others) is the fifth or sixth interspace, 2-3 cm. outside the nipple line and inside the outer limits of dulness. The position is one of the most favorable for drainage of the pericardium and the chances of injury to the heart very slight. The needle introduced at this point may transfix the pleura, but this accident is of little or no importance.