The Region of the Elbow. 



ial artery with a vein on either side (venae comites) and 

 the tendon of the biceps muscle. These structures occupy a 

 space, half an inch in width, in front of the elbow, and are 

 arranged in the following order from within outwards, viz.: 

 Netve, artery, tendon. (Fig 3.) 

 There is another triangle in the 

 region of the elbow, but it is situ- 

 ated posteriorly and has its apex 

 formed by the origins of the an- 

 coneus and the lower fibres of 

 the extensor carpi radialis longior, 

 which arise from the external 

 condyle, and its sides by the di- 

 vergence of. these muscles. In 

 . 3 } this triangle the head of the radius 



Relations of Nerve, Artery and may be distinctly felt, being 



separated from the integument 



by the superficial and the deep fasciae and by the orbicu- 

 lar ligament only. 



Phlebotomy. The superficial veins in the region 

 of the elbow are : The radial externally, the anterior 

 and the posterior ulnar internally, and the median 

 in front. The latter vein divides into two branches 

 median basilic and median cephalic, at a point about one 

 and one-half inches below the level of the internal con- 

 dyle and a little external to the middle line of the joint. 

 Just before this division takes place the median vein receives 

 a short communicating branch from the deep veins, i.e. , from 

 the venae comites of the radial artery, and this branch 

 pierces the deep fascia at the point of division of 

 the median vein above mentioned. The median basilic, 

 about two inches in length, ascends and unites with the 

 two ulnar veins to form the basilic, while the median 

 cephalic, one and one-half inches long, unites with the 



