A 9-year-old child with Legg-Calvé-Perthes disease is being discharged home. Which instruction should the nurse prioritize when teaching the parents about home care management?

The priority is joint protection through activity restrictions and assistive devices to prevent further damage to the femoral head during healing. Other options are contraindicated as they may worsen the condition or pose risks.

Understanding Legg-Calvé-Perthes Disease
Legg-Calvé-Perthes disease (LCPD) is a childhood hip disorder where blood supply to the femoral head is temporarily disrupted, leading to avascular necrosis. This causes the bone to become weak and susceptible to fracture or collapse. The disease progresses through stages of necrosis, fragmentation, reossification, and remodeling, a process that can take several years. During the active stages, the primary goal of management is to maintain the femoral head within the acetabulum (containment) and protect the softened bone from deformity to preserve joint congruity and prevent early-onset osteoarthritis ^[3].

Analyzing the Options

1. Encourage high-impact activities like running and jumping to strengthen the hip muscles: This instruction is contraindicated. High-impact activities place excessive stress on the avascular, weakened femoral head, significantly increasing the risk of subchondral fracture and progressive flattening of the femoral head (coxa plana). Management explicitly requires activity modification to protect the joint, not stress it ^[3].



2. Maintain activity restrictions and use assistive devices as prescribed to protect the hip joint: This is the correct instruction. The cornerstone of non-operative management during the active stages of LCPD involves weightbearing and activity restrictions. These are prescribed to minimize mechanical stress on the necrotic bone, thereby preventing deformity and maintaining the spherical shape of the femoral head. Assistive devices, such as crutches or a walker, are often used to offload the joint, and in some cases, casting or bracing is required to enforce non-weightbearing and containment ^[3].



3. Apply heat packs to the affected hip for 30 minutes three times daily: This is not a standard or evidence-based recommendation for LCPD. While heat may provide comfort for muscle spasms, it does not address the underlying pathology of avascular necrosis and does not protect the femoral head from deformity. The focus of home care is on joint protection through activity modification ^[3].



4. Administer aspirin for pain management and anti-inflammatory effects: This is a critical safety issue. Aspirin is generally avoided in children due to its association with Reye's syndrome, a rare but potentially fatal condition causing encephalopathy and liver failure. For pain management in LCPD, acetaminophen or NSAIDs like ibuprofen are safer alternatives if prescribed. The primary intervention, however, is not pharmacological but mechanical, through activity restriction ^[3].

The Priority Nursing Instruction: Joint Protection
The discharge teaching must prioritize the preservation of the femoral head's shape. The active stages of Perthes disease represent a vulnerable period where the weakened bone is at high risk for irreversible deformation under normal weightbearing loads ^[3]. A study examining the impact of these treatments found that weightbearing and activity restrictions are commonly prescribed and are a central component of care, directly influencing the child's physical health outcomes ^[3]. Therefore, strict adherence to the prescribed activity restrictions and proper use of assistive devices are non-negotiable for parents to understand and implement at home. This mechanical protection is the most direct intervention to prevent long-term complications such as a deformed femoral head, limb length discrepancy, and degenerative joint disease ^[3].