Final answer:
Humeral shaft fracture with non-union around a nail refers to an unhealed break in the humerus despite a surgical procedure involving a nail. Complications can include arterial compression leading to ischemia and nerve damage. Further surgery may be required for proper healing.
Step-by-step explanation:
A humeral shaft fracture with non-union around a nail is a medical condition that refers to a break in the middle section (shaft) of the humerus (the upper arm bone) that has not properly healed ('non-union') despite surgical intervention with a type of internal fixation known as a nail. This can occur due to various reasons, such as infection, inadequate stabilization, or insufficient bone healing response. In the event of a fracture, complications can arise, including compression of major arteries leading to ischemia (lack of oxygen) and potential damage to nerves associated with shoulder and upper limb muscles. Treatment may involve further surgical intervention to promote healing, such as bone grafting, revision of internal fixation, or the use of alternative stabilization methods.