150 



ELEMENTAEY OPERATIONS. 



a 



1 



Some needles are armed and protected with handles, as those 

 of Trelat, of Riverdin, and of Simpson. Sometimes their lanceo- 

 lated part has the eye pierced in its center ; in others, the eye is 

 merely a notch, closed by a repulsor, moved by shding through 

 the handle. Generally, the hand is sufficient to push the needle 

 through the skin, but at times, as has been mentioned, forceps or 

 needle-holders are necessary, such as the needle-holder of Mat- 

 thieu, an ordinary forceps or an ordinary pin-holder. The com- 

 mon wire dressing pin is also included among suture implements, 



