July 31, 1915


Author Affiliations

San Diego, Calif.

JAMA. 1915;LXV(5):420-421. doi:10.1001/jama.1915.25810050001014a

This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables.


The widely increasing work among surgeons in the treatment of bone lesions by direct methods has created a demand for motor-driven instruments, several of which are now on the market. All of these, however, aside from being very expensive, lack several essential qualities which we have tried, in a measure, to develop in the instrument described below.

The instrument consists of a 1/15 horse power motor connected with a driving shaft, 4 inches long, at the end of which is screwed a chuck for securing the surgical bits. Around these parts there is a snug fitting, detachable metal case permitting free and easy access to the motor mechanism. At the posterior end of the case there is fitted a permanent hollow grip in which are stored the resistance coils and control mechanism. In addition to this grip, there is a detachable handle which can be fastened to the shell around

First Page Preview View Large
First page PDF preview
First page PDF preview