A 78-year-old client is admitted to the emergency department after falling at home. The client reports severe pain in the right hip and is unable to bear weight. Which assessment finding would be most indicative of a fractured hip?

External rotation and shortening of the affected leg is the classic sign of hip fracture due to muscle pull on the distal fragment. Bruising and swelling are nonspecific, while inability to flex or neuro symptoms may occur but are less characteristic.

Understanding the Clinical Presentation of a Hip Fracture

When assessing a client with a suspected hip fracture, the physical examination is critical for rapid identification and prevention of complications. In the context of trauma, such as a fall, the musculoskeletal system responds to a complete fracture with specific, predictable deformities caused by the unopposed pull of muscles on the fracture fragments.

For a client with a femoral neck or intertrochanteric fracture, the classic and most indicative assessment finding is external rotation and shortening of the affected leg. This occurs because the iliopsoas muscle, a strong hip flexor, pulls the proximal fragment into flexion and external rotation. Simultaneously, the gluteal muscles and other external rotators act on the distal fragment, causing the entire leg to rest in a position of external rotation. The displacement of bone fragments overriding each other due to muscle spasm results in an apparent shortening of the limb. This combination is a hallmark sign that strongly suggests a displaced fracture, distinguishing it from soft tissue injuries or non-displaced fractures.

The other options, while clinically relevant, are less specific. Bruising and swelling (Option 1) are common findings in any significant soft tissue injury or contusion and are not specific to a fracture. Inability to flex the hip joint (Option 3) is a non-specific finding related to pain and muscle spasm that can occur with severe arthritis, bursitis, or a contusion. Numbness and tingling (Option 4) suggest a neurovascular complication, which is a critical secondary assessment to rule out sciatic nerve or vascular injury, but it is not the primary defining characteristic of the fracture itself.

The management of fractures, particularly in the subtrochanteric region, highlights the importance of recognizing these deformities as they directly influence the choice of surgical approach and the challenges of reduction ^[1]. While the classic osteoporotic hip fracture presents with this characteristic deformity, it is also crucial to understand that not all femoral fractures are typical. For instance, long-term bisphosphonate use, a common treatment for osteoporosis, is paradoxically associated with atypical femoral fractures (AFFs) in the subtrochanteric or femoral shaft region ^[2]. These fractures often present with prodromal pain in the thigh or groin and may occur with minimal or no trauma, and their radiographic appearance and clinical presentation differ from the classic externally rotated, shortened leg seen in a typical osteoporotic hip fracture. This distinction underscores the importance of a thorough medication history in any client presenting with hip or thigh pain ^[2].