Final answer:
In a Galeazzi fracture that cannot be reduced, interposed soft tissue structures like the pronator quadratus muscle, tendons or joint capsule are typically preventing the reduction. This condition is most often associated with the distal radioulnar joint. Proper management of the interfering tissue is necessary for successful treatment.
Step-by-step explanation:
When dealing with a Galeazzi fracture (Galeazzi fx) that is unable to be reduced, it's typically because of an interposed soft tissue structure. The most common structure that prevents reduction is the distal radioulnar joint (DRUJ) where the torn pronator quadratus muscle, tendons or joint capsule are interposed between the fracture fragments.
Identifying and carefully managing the obstructing tissue is crucial for successful reduction and healing of a Galeazzi fracture.