Question

In a fracture of the midshaft of the humerus, which artery is most likely to be injured?

A. Subscapular
B. Posterior circumflex humeral
C. Radial recurrent
D. Deep brachial
E. Circumflex scapular

Answer 1

The artery most likely to be injured in a fracture of the midshaft of the humerus is the deep brachial artery due to its location along the posterior surface of the arm and in the radial groove with the radial nerve.

Step-by-step explanation:

In cases of a fracture of the midshaft of the humerus, the artery most likely to be injured is the deep brachial artery. The deep brachial artery, also known as profunda brachii, runs along the posterior surface of the arm and is particularly susceptible to injury when there is a fracture to the midshaft of the humerus because it travels in the radial groove of the humerus with the radial nerve. An injury to this artery can have serious implications, including inadequate blood supply to the arm, which can lead to ischemia or muscular damage.