Musculoskeletal Disorders & Care
Key Takeaways
- Prompt neurovascular assessment using the 6 Ps is the foundation of fracture care, performed both before and after any immobilization.
- Compartment syndrome is characterized by severe pain out of proportion to the injury; interventions include keeping the limb at heart level, avoiding cold, and preparing for fasciotomy.
- Fat embolism syndrome presents within 24 to 72 hours of a long bone fracture with respiratory distress, confusion, and a classic petechial rash.
- Wet plaster casts must be handled only with the palms of the hands to prevent pressure indentations that can cause underlying tissue necrosis.
- In traction, weights must always hang freely, never touch the floor or bed, and should never be removed or adjusted without a direct order.
Musculoskeletal Disorders & Care
Musculoskeletal care in nursing involves the management of fractures, cast care, traction, and serious infectious bone conditions like osteomyelitis. The Dubai Health Authority (DHA) exam tests these areas extensively, emphasizing the prevention of limb-threatening and life-threatening complications such as compartment syndrome and fat embolism.
Fractures and Immediate Care
A fracture is a disruption in the continuity of a bone, typically caused by trauma, repetitive stress, or pathological conditions like osteoporosis. Fractures are classified based on several characteristics:
- Closed (Simple): The skin remains intact over the fracture site.
- Open (Compound): The bone breaks through the skin, creating an open wound. This carries a high risk of bacterial contamination and osteomyelitis.
- Comminuted: The bone is splintered or crushed into multiple fragments.
- Greenstick: An incomplete fracture where one side of the bone is broken and the other is bent (predominantly seen in children due to flexible bones).
- Spiral: The fracture line spirals around the shaft of the bone, often caused by twisting forces.
Clinical Assessment and the "6 Ps"
When a patient presents with a suspected fracture, the nurse must perform an immediate assessment. Symptoms include localized pain, visible deformity, swelling, bruising, loss of function, and crepitus (a grating sensation or sound caused by bone fragments rubbing together). Do not attempt to move the limb to elicit crepitus, as this causes further soft tissue damage.
The priority action is to immobilize and splint the extremity in the position it was found, checking the patient's neurovascular status before and after immobilization. A comprehensive neurovascular assessment is guided by the 6 Ps:
- Pain: Assess for severe pain, especially pain that is disproportionate to the injury or unrelieved by narcotics.
- Pulselessness: Palpate peripheral pulses distal to the injury. Compare them bilaterally.
- Pallor: Check the skin color, temperature, and capillary refill time (should be < 3 seconds).
- Paresthesia: Assess for numbness, tingling, or a "pins and needles" sensation. This is often an early sign of nerve compression.
- Paralysis: Evaluate the patient's ability to move their fingers or toes.
- Poikilothermia: Note if the affected limb is cool or cold to the touch compared to the unaffected limb.
Critical Complications of Fractures
Compartment Syndrome
Compartment Syndrome is a limb-threatening medical emergency. It occurs when increased tissue pressure within a closed fascial compartment compromises circulation, leading to muscle and nerve ischemia. If untreated, it can cause muscle necrosis, permanent paralysis, or amputation within 4 to 6 hours.
- Clinical Presentation:
- The earliest and most classic sign is severe, progressive pain that is out of proportion to the injury and unrelieved by opioid analgesics.
- Pain that worsens with passive stretching of the affected muscles.
- Paresthesia (sensory loss) is another early sign.
- Loss of pulses (pulselessness) and paralysis are late, grave signs indicating irreversible tissue necrosis.
- Nursing Interventions:
- Notify the healthcare provider immediately.
- Do NOT elevate the limb above heart level: Elevation increases venous drainage but decreases arterial perfusion pressure, worsening ischemia. Keep the limb at heart level.
- Do NOT apply cold compresses: Cold causes vasoconstriction, which further reduces arterial blood flow to the ischemic tissue.
- Remove or loosen tight dressings, splints, or bandages. Prepare the patient for an emergency fasciotomy (a surgical procedure where the fascia is cut to relieve pressure).
Fat Embolism Syndrome (FES)
Fat Embolism Syndrome is a life-threatening systemic complication. It occurs when fat globules are released from the bone marrow of a fractured long bone (most commonly the femur, pelvis, or tibia) and enter the venous circulation, blocking pulmonary and systemic blood vessels. FES typically manifests 24 to 72 hours after the injury.
| Assessment Area | Clinical Findings in Fat Embolism Syndrome (FES) |
|---|---|
| Respiratory | Severe dyspnea, tachypnea, hypoxemia, cyanosis, and bilateral pulmonary crackles. |
| Neurological | Restlessness, agitation, confusion, lethargy, and altered mental status due to cerebral hypoxia. |
| Dermatological | Petechial rash — non-blanching, red-brown spots on the neck, anterior chest, axillae, buccal mucosa, or conjunctiva. This petechiae is the classic pathognomonic sign distinguishing FES from pulmonary embolism. |
- Nursing Interventions:
- The most effective prevention is early immobilization and stabilization of long bone fractures (e.g., immediate splinting, traction, or surgical fixation).
- Administer high-flow oxygen to correct hypoxemia.
- Place the patient in a High-Fowler's position to ease breathing.
- Maintain bed rest and notify the provider immediately. Prepare for supportive care, including intravenous fluids and mechanical ventilation.
Cast Care and Client Education
A cast is a temporary circumferential immobilization device. Casts are made of either Plaster of Paris or synthetic fiberglass.
- Plaster of Paris Casts: Take 24 to 72 hours to dry completely. As they dry, they undergo a chemical reaction that generates heat.
- Wet Cast Care: Handle a wet plaster cast only with the palms of the hands, not the fingertips. Fingertip pressure creates indentations on the inside of the cast, which press against the skin and lead to pressure ulcers. Keep the cast uncovered and exposed to air. Elevate the casted limb on cloth-covered pillows to reduce swelling. Avoid placing a wet cast on hard or sharp surfaces.
- Fiberglass Casts: Dry within minutes, are lightweight, and are relatively water-resistant, though the padding underneath must be dried thoroughly if it gets wet.
Client and Family Education
- Do NOT scratch: Never insert any objects (such as wire hangers, rulers, or pencils) inside the cast to scratch an itch. This can scratch or break the skin, creating a portal for bacteria that causes hidden, severe infections. Suggest using a hair dryer set on the cool setting to blow air into the cast to relieve itching.
- Keep dry: Instruct the patient to keep plaster casts dry by wrapping them in plastic during bathing.
- Neurovascular checks: Teach the patient to monitor for the "6 Ps" at home.
- Report Red Flags: Call the doctor immediately for worsening pain unrelieved by medicine, numbness/tingling, cold fingers or toes, foul-smelling drainage from the cast, or localized "hot spots" on the cast surface (which indicate an underlying pressure sore).
Traction Management
Traction is the application of a pulling force to an injured part of the body to attain alignment, immobilize the joint, reduce fracture deformity, and relieve muscle spasms.
Skin Traction (e.g., Buck's Traction)
Skin traction involves applying boot, splint, or adhesive materials to the skin, which transmit a pulling force to the bone. Buck's traction is commonly used for patients with a fractured hip or femur before surgery.
- Nursing Care:
- Check the skin: Remove the foam boot to inspect the skin over the heel, malleoli, and Achilles tendon at least twice daily.
- Monitor weights: Ensure that the traction weights hang freely at all times. Weights must never rest on the floor, the bed frame, or be lifted.
- Maintain alignment: Keep the patient in a straight supine position. Prevent the patient from sliding down the bed, as this counteracts the traction force. Place the bed in a slight Trendelenburg position if needed.
- Never adjust weights: Weights must only be added or removed with a direct medical order.
Skeletal Traction
Skeletal traction applies a pulling force directly to the bones using pins, wires, or tongs (e.g., halo traction, Crutchfield tongs) inserted surgically into the bone.
- Nursing Care:
- Pin Site Care: Cleanse pin sites daily to prevent osteomyelitis. Use sterile technique, clean cotton swabs for each pin, and the prescribed solution (typically chlorhexidine 2% or sterile saline).
- Assess for infection: Check pin sites for redness, warmth, swelling, purulent drainage, or tenting of the skin.
- Check that the ropes are in the center of the pulley tracks and that weights hang freely.
Osteomyelitis
Osteomyelitis is a severe infection of the bone, bone marrow, and surrounding soft tissue, most commonly caused by Staphylococcus aureus. It can occur through direct entry (open fracture, penetrating wound, joint surgery) or hematogenous spread (from a bloodborne infection elsewhere).
Clinical Manifestations
- Local: Constant, pulsating bone pain that worsens with movement and is unrelieved by rest; localized swelling, warmth, erythema, and tenderness; restricted movement of the affected part.
- Systemic: High fever, chills, night sweats, nausea, and malaise.
Nursing Interventions
- Antibiotic Therapy: Administer prescribed long-term intravenous antibiotics (often lasting 4 to 6 weeks or longer). A Peripherally Inserted Central Catheter (PICC) is typically placed for home infusion.
- Safety: Monitor peak and trough levels of nephrotoxic and ototoxic antibiotics (e.g., Vancomycin). Monitor renal function (creatinine, BUN) and complete blood count (CBC).
- Wound Care: Perform sterile dressing changes for open wounds. Use strict aseptic technique.
- Pain Management: Support and immobilize the affected limb to reduce pain. Administer prescribed analgesics.
A client with a lower leg fracture in a plaster cast reports severe, progressive pain that is unrelieved by the prescribed intravenous morphine. What should be the nurse's immediate action?
A nurse is caring for a client who sustained a femur fracture 48 hours ago. The client suddenly develops dyspnea, confusion, and a respiratory rate of 28 breaths/minute. Which assessment finding by the nurse specifically suggests fat embolism syndrome rather than a pulmonary embolism?
A nurse is checking a client who is in Buck's extension traction. The nurse notes that the traction weights are resting on the floor. Which action should the nurse take first?