Nursing Care for Musculoskeletal Disorders

Types of Casts

1. Plaster of Paris: This material is heavy and not water-resistant. It takes a significant amount of time to dry completely, ranging from 10 to 72 hours.
2. Synthetic Fiberglass: This is the more modern option; it is lightweight, water-resistant, and dries very quickly, often within 5 to 20 minutes.

Nursing Interventions for Cast Care

To ensure patient safety and cast integrity, nurses should follow these evidence-based practices:

• Handling Wet Casts: When working with a wet Plaster of Paris cast, always use your palms rather than your fingertips. Using fingers can create indentations in the wet plaster, which may lead to pressure ulcers and skin breakdown.
• Edema Management: Elevate the affected limb above the level of the heart for the first 24 hours to minimize swelling.
• Ice Application: Ice packs can be used to reduce swelling, but they should never be applied for longer than 20 minutes at a time.
• Skin Integrity: Never allow a patient to insert foreign objects (like rulers or knitting needles) into the cast to scratch an itch, as this can cause skin tears and infection.
• Post-Removal Care: Once a cast is removed, the skin may be dry or flaky. The patient should soak the extremity in warm water and apply lotion.

Scoliosis: Assessment and Treatment

Scoliosis is characterized by an S-shaped lateral curvature of the spine. It is most commonly seen in girls between the ages of 8 and 15. Because the curvature can interfere with organ function, early detection is vital.

Assessment

Nurses can perform a basic screening by asking the patient to bend at the waist with their arms hanging down over their head. The nurse should observe for:

• Asymmetry of the scapula (shoulder blades).
• Uneven shoulders or hips.
• A leaning posture to one side.

Treatment Pathways

The intervention is determined by the degree of the spinal curve:

• Curvature $< 20^\circ$: No specific treatment is required, but the patient should be followed closely.
• Curvature $20^\circ–50^\circ$: Bracing is indicated. Common braces include the Milwaukee Brace or the TLSO (Thoracolumbosacral orthosis). These are typically worn for 16–23 hours per day and should be worn over a shirt.
• Curvature $> 50^\circ$: Surgical intervention is necessary, typically involving spinal fusion with rods. In some cases, halo traction may be required, which necessitates meticulous pin care by the nursing staff.

Progressive and Congenital Disorders

Muscular Dystrophy (Duchenne)

Duchenne Muscular Dystrophy (DMD) is an X-linked recessive, progressive degenerative disease. It is caused by the absence of dystrophin, a protein essential for skeletal muscle function.

Symptoms typically manifest in early childhood (ages 3–5) and include delayed motor development and hypertrophied calf muscles. A hallmark clinical sign is Gower’s maneuver, where the child must use their hands to "walk up" their own legs to stand from a sitting position. While there is no cure, prednisone may be administered to help increase muscle strength.

Osteogenesis Imperfecta

Often referred to as "brittle bone disease," this is a congenital defect that results in bones that fracture easily. A common clinical finding is the presence of blue sclera (the white part of the eye appearing blue).

Treatment is primarily supportive, involving gentle handling of the child. Pharmacological management includes pamidronate IV to increase bone density.

Critical Nursing Alert: When administering pamidronate, nurses must closely monitor the patient's electrolytes, specifically: $\begin{aligned} K^+ \\ Mg^{2+} \\ Ca^{2+} \\ P \end{aligned}$

Juvenile Idiopathic Arthritis (JIA)

JIA is a chronic autoimmune inflammatory disease that affects the joints and other tissues. Patients often experience joint swelling, redness, and warmth, which tends to be worse in the morning or after periods of inactivity.

Management is multidisciplinary and includes:

• Medications: NSAIDs, corticosteroids, and methotrexate (to slow joint degeneration).
• Therapy: Physical therapy (PT), exercise programs, and heat packs to loosen joints before activity.
• Support: Coordination with school nurses and teachers to accommodate mobility limitations.

Oncology: Osteosarcoma

Osteosarcoma is the most common bone cancer in children. It frequently affects the femur and typically appears in children aged 10 and older, often following a growth spurt.

Clinical presentation usually involves localized pain (which may be relieved by flexing the limb) and changes in gait, such as limping. Treatment options are intensive and may include chemotherapy, amputation, or limb salvage surgery.