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JAMA. 1890;XV(23):840-841. doi:10.1001/jama.1890.02410490032010.
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ABSTRACT

VON KLEIN'S INTUBATION THIMBLE.  BY CARL H. VON KLEIN, M.D., OF DAYTON, O.Among the most treacherous looking instruments in intubation of the larynx is the gag, and those who have performed the operation frequently know that there is nothing so shocking to the parent's feeling as when the gag is applied and slips, which in nine cases out of ten will produce bleeding of the gums, and when blood is seen they will beg, "Doctor, don't torture it, let it die;" while in reality they are not hurt, but a slight bruising of the gums. However, I have had cases where the teeth broke out, and especially when the aveolar process of the maxillae was very light the teeth turned out. I have of late become so disgusted with the gag, that I have intubated without, and have taken the chances of being bit. In one case I was

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