Musculoskeletal Disorders - Arthroplasty & Amputations

NCLEX Prep: Musculoskeletal Disorders - Arthroplasty & Amputations

High-yield NCLEX content on arthroplasty and amputations focusing on surgical procedures, priority nursing interventions, complication recognition, and client education.

NCLEX Focus Areas

  • Expect questions on:
      - Priority nursing actions
      - Client teaching
      - Positioning precautions
      - Complication recognition for arthroplasty and amputation clients

Understanding Arthroplasty

Definition

  • Arthroplasty: Surgical removal of a diseased joint and replacement with prosthetic devices made of metal and/or plastic.
      - Important NCLEX Note: The prosthetic joint is vulnerable to dislocation in the early postoperative period.

Types of Arthroplasty

  • Total Joint Replacement: Replaces all components of the joint.

  • Hemiarthroplasty: Replaces only half of a joint.
      - NCLEX Tip: Hip hemiarthroplasty is common after femoral neck fractures in elderly clients.

Indications for Surgery

  • Treatment for:
      - Osteoarthritis
      - Rheumatoid arthritis
      - Osteonecrosis
      - Trauma
      - Congenital anomalies

  • Surgery is indicated when conservative measures, such as NSAIDs and physical therapy, have failed.

Common Arthroplasty Procedures

Total Knee Arthroplasty

  • Replaces distal femoral component, tibia plate, and patellar button.

  • Indication: Used when conservative measures fail.

  • NCLEX Alert: Avoid placing pillows behind the knee to prevent flexion contracture.

Unicondylar Knee Replacement

  • Recommended when disease affects only one joint compartment.

  • NCLEX Alert: Smaller procedure with faster recovery compared to total knee replacement.

Total Hip Arthroplasty

  • Replaces acetabular cup, femoral head, and femoral stem.

  • NCLEX Alert: Understanding hip precautions is critical:
      - No flexion >90°
      - No adduction
      - No internal rotation

Client Presentation for Arthroplasty

Recognition

  • Understanding classic signs of joint disease is essential to identify candidates for arthroplasty.

Symptoms

  • Pain: Pain while bearing weight on the joint (e.g., walking, running).
      - Tip: Weight-bearing pain is a hallmark of osteoarthritis.

  • Joint Issues: Crepitus, stiffness, and limited motion.
      - Morning stiffness lasting over 1 hour indicates rheumatoid arthritis versus osteoarthritis.

  • Swelling: Primarily occurs in the knees.

Neurovascular Checks

  • Essential to compare neurovascular status bilaterally.

Pre-Procedure Care for Arthroplasty

NCLEX Priority

  • Proper pre-op preparation reduces surgical risk.

  • Be prepared for questions linking abnormal laboratory values to surgical risk.

Diagnostic Review

  • Required Labs:
      - CBC
      - Urinalysis
      - Electrolytes
      - BUN
      - Creatinine
      - Chest x-ray
      - ECG

  • Important: Abnormal creatinine levels indicate renal impairment, affecting anesthesia and medication excretion.

Blood Donation

  • Consider autologous blood donation before the procedure to reduce transfusion risk.

Skin Preparation

  • Scrubbing surgical site with prescribed antiseptic soap helps reduce the risk of surgical site infections.

Medications

  • Allowed medications, like antihypertensives, can be taken with a sip of water the morning of surgery.
      - Clarify with the provider regarding anticoagulants, which may be held.

Post-Procedure Care: Knee Arthroplasty

NCLEX Priority

  • Neurovascular checks are vital every 2–4 hours.
      - Immediately report diminished pulses, pallor, or increased pain.

Continuous Passive Motion (CPM) Machine

  • Promotes knee movement and prevents scar tissue formation.

  • Tip: CPM is meant to maintain ROM, not replace weight-bearing or physical therapy.

Positioning

  • Avoid using pillows behind the knee.

  • Place one pillow under the lower calf to maintain slight extension.
      - Tip: Using pillows behind the knee poses a risk for flexion contracture.

Medications

  • Administer prescribed analgesics, antibiotics, and anticoagulants.
      - Anticoagulants are prescribed to prevent DVT, a common complication post-knee replacement.

Monitoring

  • Assess neurovascular status every 2–4 hours.

  • Apply ice to reduce swelling.

  • Use the 6 P's: Pain, Pallor, Pulselessness, Paresthesia, Paralysis, Poikilothermia.

Post-Procedure Care: Hip Arthroplasty

Wound Care

  • Frequently check the dressing for bleeding and monitor drainage from surgical drains.
      - Tip: Report excessive drainage, indicating possible hemorrhage or infection.

Lab Values

  • Monitor daily hemoglobin (Hgb) and hematocrit (Hct) levels, which may drop for 48 hours after surgery.
      - Normal ranges: Hgb 12–17 g/dL, Hct 36–51%.
      - A significant drop may indicate hemorrhage.

Mobility

  • Transfer the client from the unaffected side.
      - Weight-bearing status will be determined by the surgeon.

  • Tip: Always transfer toward the unaffected side.

Positioning

  • Place the client in a supine position with the head slightly elevated.

  • Use an abduction device between legs during turning to prevent adduction and internal rotation, essential for dislocation prevention.

Hip Precautions After Arthroplasty

Client Education - "3 Nos"

  • No Flexion >90°

  • No Adduction

  • No Internal Rotation
      - Tip: These precautions are highly tested in NCLEX.

Seating

  • Use straight chairs with arms and raised toilet seats to prevent hip flexion >90°.
      - Tip: Low, soft chairs contraindicated — avoid incorrect choices.

Leg Position

  • Avoid crossing legs and keep toes pointed outward to prevent dislocation.

Sleeping

  • Use an abduction pillow between legs and avoid turning to the operative side unless prescribed.
      - Tip: The abduction pillow must remain in place when repositioning.

Complications of Arthroplasty

NCLEX Priority

  • Recognizing and prioritizing complications is a heavily tested area.

Key Complications

  • Venous Thromboembolism: DVT or pulmonary embolism, especially in older adults.
      - Action: Administer anticoagulants, use compression stockings, encourage early ambulation.
      - Sudden dyspnea may indicate PE — notify the provider immediately.

  • Joint Dislocation: Signs include acute pain, a “popping” sound, rotation of the extremity.
      - Action: Do NOT reposition the joint; keep the client still and call the provider.

  • Infection: Symptoms include fever, increased redness, swelling, and purulent drainage.
      - Action: Obtain culture before starting antibiotics as prosthetic joint infections are emergencies.

  • Anemia: May arise from blood loss during and after surgery.
      - Action: Monitor Hgb/Hct levels daily and assess for fatigue, pallor, tachycardia — blood transfusion may be needed.

Understanding Amputations

Definition

  • Amputation: Removal of a body part, most commonly an extremity, can be elective or traumatic.
      - Tip: Elective amputations are planned; traumatic require emergency management.

Statistics

  • Approximately 2.1 million Americans live with limb loss.

  • 185,000 amputations occur yearly, with 65% being lower limb amputations.
      - Tip: These statistics make amputation care a frequent NCLEX topic.

Causes

  • Approximately 50% of lower limb amputations relate to complications from peripheral artery disease and diabetes.
      - Tip: Always assess diabetic patients for peripheral vascular issues.

Types of Amputations

  • Upper Extremity: Includes above/below-elbow amputations, wrist/shoulder disarticulations, and finger amputations.
      - Commonly caused by traumatic injuries.

  • Lower Extremity: Includes above/below-knee amputations, hip/knee disarticulations, Syme's amputation, and toe amputations.
      - Primarily related to peripheral vascular disease; attempts to conserve as much of the extremity as possible.

Risk Factors for Amputation

NCLEX Alert

  • Nurses should identify at-risk clients, with diabetic patients with peripheral vascular disease being the highest-risk group.

Additional Risk Factors

  • Traumatic Injury: Motor vehicle crashes, industrial injuries, war injuries.

  • Thermal Injury: Frostbite, electrocution, severe burns.

  • Chronic Disease: Peripheral vascular disease, diabetes mellitus, infections.

  • Malignancy: Tumors that necessitate limb removal.

Assessment for Decreased Tissue Perfusion

NCLEX Priority

  • Assessing for tissue perfusion is crucial before amputation.
      - Use of Doppler can indicate non-palpable pulses, necessitating urgent reporting.

Key Assessment Points

  • Pain: Clients often report pain in the affected extremity.
      - Tip: Claudication is a hallmark of peripheral artery disease.

  • Altered Pulses: Use Doppler to assess peripheral pulses; absent pulses indicate an emergency.
      - Always compare bilaterally and document findings.

  • Temperature: Note temperature differences in extremities; cooler extremities suggest reduced perfusion, assisting in determining amputation level.

  • Skin Changes: Look for pallor, cyanosis, gangrenous skin, and lack of hair.
      - Tip: Gangrene is a surgical emergency; do not delay notifying the provider.

Management of Traumatic Amputation

NCLEX Priority

  • Follow the ABCs of care, but hemorrhage control is the immediate concern.
      - This is the first nursing action.

Immediate Actions

  • Activate EMS: Call emergency services immediately.
      - Tip: Emergency call should be the priority if in a community setting.

  • Control Bleeding: Apply direct pressure with gauze or clean cloth.
      - Tip: Direct pressure is always the first intervention for bleeding.

  • Elevate Extremity: Raise above heart level to mitigate blood loss, using gravity to decrease venous outflow.

  • Preserve Limb: Wrap in dry sterile gauze, place in a sealed bag, and submerge in ice water (do Not place limb directly on ice to avoid frostbite).

Postoperative Nursing Care for Amputations

Priority Care

  • Focus on:
      1. Preventing complications
      2. Monitoring tissue perfusion with the 6 P's
      3. Assessing for infection
      4. Managing both incisional and phantom pain
      5. Supporting psychological adjustment
      - Holistic care is critical, anticipating disturbances in body image as a nursing diagnosis.

Pain Management After Amputation

NCLEX High-Yield

  • Phantom Limb Pain: This sensation must be acknowledged and treated; it's not purely psychological as it has a neurological basis.

  • Incisional Pain: Managed with prescribed analgesics, responding well to standard protocols.
      - Tip: Always assess pain before and after administering analgesics.

  • Phantom Limb Pain Treatments:
      - Pharmacological: calcitonin, beta blockers, antiepileptics, antispasmodics, antidepressants.
      - Non-pharmacological: massage, heat, TENS, ultrasound, biofeedback, and relaxation techniques.

Residual Limb Preparation

NCLEX Focus

  • Proper residual limb shaping is critical for prosthesis fitting; know the applicable methods for client education.

Methods

  • Figure-Eight Wrap: Elastic bandages applied to prevent blood flow restriction and decrease edema.
      - Tip: Rewrap every 4–8 hours and when loosened.

  • Shrinker Sock: Easier for patient to apply independently to help properly shape the residual limb.
      - Tip: Promotes client independence as a rehabilitation goal.

  • Air Splint: Inflatable device that protects and shapes the residual limb while allowing for wound inspections.
      - Tip: It allows for visual monitoring of the wound without full dressing removal.

General Residual Limb Care

  • Inspect daily for redness, blisters, or breakdown; keep clean and dry, avoiding lotions between folds.

  • Report any signs of infection immediately.
      - Tip: Skin breakdown is the primary barrier to prosthesis use.

Positioning & Edema Control

  • Elevate the residual limb for the first 24 hours post-op only; prolonged elevation may lead to contractures.

  • Avoid dependent positioning and use continuous compression wrapping except during bathing and wound care.
      - Tip: Pills under the stump may present a flexion contracture risk.

Prosthesis Readiness Criteria

  • Wound healed with no open areas or active drainage

  • Adequate shaping of the residual limb, cylindrical or conical

  • No skin breakdown with wrapping or shrinker use

  • Client shows mastery of donning/doffing techniques
      - Tip: Fitting typically begins 4–8 weeks after amputation when the limb stabilizes.

Client Teaching for Prosthesis

  • Instruct clients to:
      1. Never walk on the residual limb without a prosthesis.
      2. Report any skin changes immediately.
      3. Wear compression wrap/shrinker sock except while bathing.
      4. Perform daily ROM exercises to prevent contractures.
      5. Maintain a healthy weight, as this may impact prosthesis fit.

Complications After Amputation

NCLEX Alert

  • Flexion contractures are preventable through proper positioning.
      - Expect questions on strategies to prevent this complication.

Statistics

  • 20-30% of amputees experience long-term phantom pain.
      - Tip: Validate the pain; do not dismiss it as psychological.

  • Infection Rate: 5-10% risk, higher in diabetic patients and those with peripheral vascular disease; monitor closely for fever, increased redness, and purulent drainage.

  • Contractures Rate: 15-25% of amputees may develop flexion contractures without effective positioning.
      - Prevention: Employ prone positioning and proper stump positioning strategies.