NLE Musculoskeletal Nursing — Fractures, Trauma and Orthopedic InjuriesDetailed Explanation

Types of Fractures

A fracture is a break in the continuity of a bone. In clinical practice, fractures are described using several classification systems that guide management and predict complications. Understanding these classifications is essential for the NLE because exam questions often describe a fracture scenario and ask you to identify the type or anticipate the priority concern. Fractures are first classified by skin integrity: a CLOSED (simple) fracture has intact overlying skin, while an OPEN (compound) fracture involves the bone penetrating or breaking through the skin. Open fractures are a priority because the wound is a direct pathway for bacteria, making OSTEOMYELITIS (bone infection) the primary complication to prevent. By extent: a COMPLETE fracture breaks through the entire width of the bone, while an INCOMPLETE fracture breaks only partway. The classic incomplete fracture in children is the GREENSTICK fracture, where the bone bends like a green stick of bamboo and cracks on one side only. Children's bones are more pliable than adults', which is why this type is exclusively seen in pediatric patients. By fracture line pattern: TRANSVERSE fractures run straight across the bone (typically from a direct blow); OBLIQUE fractures run at an angle; SPIRAL fractures twist around the bone shaft and are commonly caused by a twisting or rotational force — importantly, in children, a spiral fracture with a vague or inconsistent history should raise suspicion of non-accidental trauma (child abuse). COMMINUTED fractures result in three or more bone fragments and are common in high-energy trauma such as vehicular accidents (common in Philippine highways) or gunshot wounds. By fragment position: a DISPLACED fracture means the fragments are out of alignment and require reduction; a NONDISPLACED fracture keeps the fragments in normal alignment. An IMPACTED fracture has one fragment driven into the other, giving the bone a telescoped appearance. Special types: a PATHOLOGIC fracture occurs in bone that has been weakened by disease — osteoporosis, bone tumors, or metastatic cancer — so it happens with minimal or no trauma. This is clinically important in elderly Filipino patients who often have osteoporosis. Clinical manifestations common to all fractures include: pain and tenderness at the site, loss of function, visible deformity, shortening of the limb (from muscle spasm pulling fragments), CREPITUS (a grating sound or sensation from bone fragments rubbing), swelling, and ecchymosis (bruising from internal bleeding).

Stages of Bone Healing

Bone is a living tissue with the remarkable ability to regenerate completely — unlike most soft tissues that heal with scar. Understanding the five stages of bone healing is critical for the NLE because questions test which nutrients are needed, what delays healing, and at what stage each complication (non-union, malunion) occurs. STAGE 1 — HEMATOMA FORMATION (Days 1–3): When a bone breaks, blood vessels in the bone and surrounding periosteum are torn. A hematoma forms at the fracture site. This clot is not just a nuisance — it is the scaffold for healing and contains growth factors that initiate the repair process. Pain, swelling, and warmth are at their peak in this stage. STAGE 2 — FIBROCARTILAGE (SOFT) CALLUS FORMATION (Days 4–21): Fibroblasts, chondroblasts, and capillary buds invade the hematoma. The clot is replaced by a soft, rubbery bridge of fibrocartilage called the soft callus. The fracture site is still not rigid. On X-ray, this callus is not yet visible. Clinically, there is less pain and swelling, but movement still disrupts healing — this is why immobilization must be maintained. STAGE 3 — BONY (HARD) CALLUS FORMATION (Weeks 3–6): Osteoblasts replace the fibrocartilaginous callus with woven (immature) bone. This hard callus is visible on X-ray as a fuzzy white bridge at the fracture site. The fracture site becomes more rigid. Adequate calcium and vitamin D are essential at this stage. STAGE 4 — OSSIFICATION: The hard callus matures as mineral crystals deposit in the woven bone, making it denser and stronger. The fracture line gradually disappears on X-ray. STAGE 5 — REMODELING (Months to years): Osteoclasts remove excess bone and osteoblasts lay down new bone along lines of mechanical stress (Wolff's Law). The bone eventually returns to its original shape and strength. Weight-bearing and functional use actually promote remodeling, which is why early mobilization is encouraged when the fracture is stable. FACTORS THAT DELAY BONE HEALING include: inadequate blood supply, infection (osteomyelitis), advanced age, poor nutrition (insufficient protein, calcium, or vitamin D), smoking (which causes vasoconstriction and reduces oxygen delivery), diabetes mellitus, and long-term corticosteroid use (inhibits osteoblast activity). Philippine nursing practice emphasizes nutrition counseling — many Filipino patients may have nutritional deficits that impair healing. COMPLICATIONS OF HEALING: - DELAYED UNION: healing is slower than expected but is still occurring - NONUNION: the fracture fails to heal despite adequate time - MALUNION: the fracture heals but in an incorrect position, causing deformity or dysfunction

Emergency and Initial Management of Fractures

The initial management of a fracture — from the scene to the emergency room — is a high-priority area in the NLE. The guiding principle is: SAFETY FIRST. Protect the patient from further injury while you assess and stabilize. PRIMARY SURVEY FIRST (ABC): In any trauma patient, always apply the ABCs first — Airway, Breathing, Circulation. A long-bone fracture is urgent, but it is not more urgent than an obstructed airway or cardiac arrest. The fracture is managed after life-threatening conditions are addressed. This reflects the Maslow hierarchy (physiologic safety > musculoskeletal injury) and is a consistent NLE principle. IMMOBILIZATION AT THE SCENE: The single most important pre-hospital intervention is to IMMOBILIZE THE FRACTURE IN THE POSITION FOUND. Do not try to straighten a deformed limb in the field. Splint the joint ABOVE and BELOW the fracture site to prevent movement at the fracture. In Philippine community settings, improvised splints using bamboo or boards are acceptable when commercial splints are unavailable. OPEN FRACTURES: Cover the wound with a sterile (or the cleanest available) dressing to prevent bacterial contamination. Control bleeding with direct pressure. NEVER push the protruding bone back into the wound — this introduces surface bacteria into the deeper tissues. NEUROVASCULAR ASSESSMENT: Before and after any splinting or casting, perform a neurovascular check: assess the 5 Ps (or 6 Ps) — pain, pulse, pallor, paresthesia, paralysis, and temperature (poikilothermia). Document and compare with the unaffected side. This is the foundation of ongoing fracture monitoring. DEFINITIVE REDUCTION: - CLOSED REDUCTION: The physician manipulates the fragments back into alignment manually, without a surgical incision. A cast or splint is then applied. - OPEN REDUCTION AND INTERNAL FIXATION (ORIF): Surgical exposure of the fracture site, with hardware (plates, screws, intramedullary rods) used to hold the fragments. Used for complex, displaced, or unstable fractures. - EXTERNAL FIXATION: An external metal frame is attached to the bone through percutaneous pins that go through the skin. Used for severe open fractures, highly comminuted fractures, or when ORIF is not immediately feasible. HEMORRHAGE AWARENESS: A femur fracture can cause 1–2 liters of blood loss into the thigh. A pelvic fracture can cause 3–5 liters. Shock is a life-threatening complication of major fractures. Monitor vital signs closely and maintain IV access.

Casts and Traction in Fracture Care

Casts and traction are the two primary non-surgical methods for immobilizing fractures. The NLE consistently tests correct nursing management and the complications to monitor for both. CAST CARE: A cast immobilizes a reduced fracture and maintains alignment while healing occurs. Casts may be made of plaster of Paris (heavier, takes 24–72 hours to fully harden, gives off heat as it dries — this is NORMAL) or fiberglass (lighter, sets quickly, water-resistant). The nurse's role in cast care includes: 1. DURING DRYING (PLASTER CAST): Support the wet cast with the PALMS of the hands — never the fingertips, as this creates pressure indentations that can cause pressure sores on the underlying skin. Keep the cast uncovered and expose to air. Do not place it on a hard surface that might dent it. 2. ELEVATION: Elevate the casted extremity above heart level for the first 24–48 hours to reduce edema and promote venous return. After this period, you may maintain elevation as needed but adjust based on assessment. 3. NEUROVASCULAR MONITORING: Check the 5–6 Ps every hour for the first 24 hours, then every 4 hours once stable. Compare with the contralateral limb. Report any change immediately. 4. ICE APPLICATION: Apply ice bags (wrapped in cloth) over the cast to the fracture area for the first 24–48 hours to reduce pain and swelling. Do not get the cast wet if it is plaster. 5. PATIENT TEACHING — THE KEY DONTS: - NEVER insert objects (sticks, rulers, fingers) inside the cast to scratch — this can break the skin and cause infection - NEVER cut or modify the cast independently - NEVER get a plaster cast wet (it weakens and loses its integrity) - REPORT: increasing pain, numbness, tingling, pallor or cyanosis of fingers/toes, foul odor or drainage from the cast (suggests infection), and any cracks or soft spots in the cast Signs that warrant cast removal or bivalving: increasing pain especially on passive stretch, neurovascular changes (pallor, paresthesia, pulselessness), foul smell, visible drainage (infection), and if compartment syndrome is suspected. TRACTION CARE: Traction applies a pulling force to maintain alignment, reduce muscle spasm, and immobilize a fracture. Principles remain the same as in standard traction care: - WEIGHTS MUST HANG FREELY and never rest on the bed or floor - Ropes must remain on the pulleys at all times - COUNTERTRACTION must be maintained (the patient's body weight or a special device acts as the counter-pull) - For SKELETAL TRACTION (pins or wires directly into bone), perform aseptic PIN-SITE CARE per protocol to prevent osteomyelitis - NEVER remove or add traction weights without a physician's order, as this disrupts bone alignment - Maintain patient alignment in the center of the bed - Monitor pin sites for redness, drainage, loosening, or infection signs

Fat Embolism Syndrome (FES)

Fat Embolism Syndrome (FES) is a potentially life-threatening complication of long-bone and pelvic fractures that every NLE candidate must master. It is a favorite board question because of its specific timing, classic triad, and clear nursing priority. PATHOPHYSIOLOGY: When a long bone (especially the femur, tibia, or fibula) or the pelvis is fractured, fat globules from the yellow bone marrow are released into the damaged blood vessels. These fat globules travel through the bloodstream and lodge in the capillaries of the lungs (causing respiratory failure), the brain (causing neurological changes), and the skin (causing petechiae — tiny pinpoint hemorrhages). CRITICAL TIME FRAME: FES typically manifests 24 to 72 hours after injury. This is the classic tested interval — NOT immediately after the fracture, and NOT after several weeks. If a patient was stable after a long-bone fracture and then develops respiratory distress between 24 and 72 hours later, FES must be the first suspected diagnosis. CLASSIC TRIAD (REMEMBER ALL THREE): 1. HYPOXEMIA — low blood oxygen, manifesting as sudden onset dyspnea (difficulty breathing), tachypnea (fast breathing), and decreased oxygen saturation (SpO₂ drops). This is the EARLIEST and MOST DANGEROUS manifestation. 2. NEUROLOGICAL CHANGES — confusion, restlessness, agitation, or altered mental status (the fat emboli affect the brain). A patient with FES may suddenly become confused or uncooperative, which can be mistakenly attributed to pain medication. 3. PETECHIAL RASH — tiny, pinpoint, non-blanching red or purple spots appearing classically on the CHEST, AXILLAE (armpits), and CONJUNCTIVA (whites of the eyes). This rash is pathognomonic (uniquely diagnostic) of FES and distinguishes it from other causes of respiratory failure. OTHER SIGNS: Fever (low-grade), tachycardia, and in severe cases, hypotension and ARDS (Acute Respiratory Distress Syndrome). NURSING MANAGEMENT — PRIORITY IS OXYGEN: 1. ADMINISTER OXYGEN immediately to correct hypoxemia — this is the PRIORITY nursing intervention 2. Position with head of bed elevated (semi-Fowler's or Fowler's) to ease breathing 3. Notify the physician immediately — FES is a medical emergency 4. Prepare for possible mechanical ventilation if respiratory failure progresses 5. Monitor vital signs and oxygen saturation continuously 6. Establish IV access; administer corticosteroids as ordered (reduce inflammation) PREVENTION: Early and adequate immobilization of long-bone fractures is the primary preventive measure. Gentle handling during transport and positioning minimizes additional fat globule release.

Compartment Syndrome

Compartment syndrome is the most critical emergency in orthopedic nursing. It occurs when pressure within a closed muscle compartment rises to the point where it compresses blood vessels and nerves, cutting off circulation to muscles and nerves within that compartment. Irreversible muscle and nerve damage can occur within 4 to 6 hours of onset. Amputation may become necessary if not treated promptly. This topic appears on almost every NLE batch. UNDERSTANDING THE MECHANISM: Muscles are enclosed in tough fascial sheaths that do not stretch. If swelling or bleeding increases the volume inside this compartment (internal cause), or if something external compresses the compartment (like a tight cast), the pressure builds up. When compartment pressure exceeds capillary perfusion pressure, blood cannot flow into the muscles and nerves, causing ISCHEMIA. CAUSES: - Internal (increased content): swelling after fracture, crush injury, reperfusion injury after ischemia, bleeding into the compartment - External (decreased container size): tight cast, circumferential dressings, pneumatic anti-shock garment (PASG) applied too tightly MOST COMMON SITES: Lower leg (anterior compartment most common), forearm, upper arm, thigh, and buttock. THE 6 Ps — SIGNS AND SYMPTOMS (MEMORIZE ALL SIX): 1. PAIN — severe, unrelenting, out of proportion to the injury. MOST IMPORTANT EARLY SIGN. The pain is WORSENED BY PASSIVE STRETCH of the muscles in the compartment (e.g., passively extending the fingers stretches the forearm compartment — worsens pain in forearm compartment syndrome). This is the earliest and most reliable clinical sign. 2. PRESSURE — tense, swollen, tight-feeling compartment on palpation 3. PALLOR — pale skin from reduced arterial flow 4. PARESTHESIA — numbness, tingling, burning sensation in the distribution of the affected nerve; an EARLY sign 5. PARALYSIS — weakness or inability to move the muscles in the compartment; a LATE sign indicating severe ischemia 6. PULSELESSNESS — absent or diminished peripheral pulse; a VERY LATE sign — DO NOT WAIT for this sign to act IMPORTANT: The 6th P in some sources is POIKILOTHERMIA (coolness of the limb from reduced blood flow). NURSING MANAGEMENT — EMERGENCY ACTIONS: 1. NOTIFY THE PHYSICIAN IMMEDIATELY — this is an orthopedic emergency 2. DO NOT ELEVATE the extremity ABOVE HEART LEVEL — elevation reduces arterial inflow and WORSENS ischemia. Keep the limb at HEART LEVEL. 3. DO NOT APPLY ICE — ice causes vasoconstriction and further reduces blood flow 4. LOOSEN OR BIVALVE THE CAST — if a cast is present, cut it open down both sides (bivalve) and spread it apart, or remove padding and dressings to relieve external pressure 5. REMOVE TIGHT DRESSINGS 6. PREPARE FOR FASCIOTOMY — a surgical incision through the skin and fascia to relieve compartment pressure. This is the DEFINITIVE treatment for compartment syndrome. 7. MONITOR compartment pressure if ordered (normal = less than 30 mmHg; intervention warranted at approximately 30 mmHg or within 20–30 mmHg of diastolic blood pressure) 8. POST-FASCIOTOMY: the fasciotomy wounds are LEFT OPEN (not sutured) to allow continued decompression; they are closed by delayed primary closure after swelling subsides.

Soft Tissue Injuries and Dislocations

Not all orthopedic trauma involves broken bones. Soft tissue injuries — sprains, strains, and dislocations — are very common and are frequently encountered in community and emergency settings in the Philippines. SPRAIN vs. STRAIN (A Classic NLE Distinction): - A SPRAIN is an injury to a LIGAMENT — the fibrous tissue that connects BONE to BONE at joints. Sprains are caused by sudden twisting or overstretching of a joint. Common examples: ankle sprain (pilek ng paa), wrist sprain, knee ligament injuries. Classification: Grade I (mild stretch, no tear), Grade II (partial tear), Grade III (complete tear). - A STRAIN is an injury to a MUSCLE or TENDON — the fibrous tissue that connects MUSCLE to BONE. Strains are caused by overuse, overstretching, or sudden powerful contractions. Common examples: hamstring strain in athletes, lower back strain. Memory Aid: Sprain = Ligament = S for Sprain, L for Ligament (note: Sprain and Ligament both have 'in/an'). Alternatively: SPRAIN = SUPPORT structures (ligaments support joints), STRAIN = STRETCH of muscles. CLINICAL MANIFESTATIONS OF BOTH: pain, swelling, limited range of motion, ecchymosis (bruising). Sprains often present with joint instability; strains present with muscle weakness and spasm. FIRST-LINE MANAGEMENT — RICE: - R = REST — stop the activity; immobilize if severe - I = ICE — apply ice for 20 minutes every 1–2 hours for the FIRST 24–48 HOURS to reduce swelling and pain. Ice causes vasoconstriction, reducing bleeding and edema in the acute phase. - C = COMPRESSION — apply an elastic bandage (ACE bandage) from distal to proximal to reduce swelling and provide support - E = ELEVATION — keep the injured part above heart level to reduce edema through gravity After the first 24–48 hours: HEAT may be applied to promote circulation, relax muscles, and accelerate healing. Switching from ice to heat is a commonly tested sequence. DISLOCATION AND SUBLUXATION: - A DISLOCATION is complete displacement of the articular surfaces of a joint — the bones are no longer in contact within the joint. - A SUBLUXATION is a PARTIAL dislocation — the articular surfaces are partially separated. Common dislocations: shoulder (most common in adults), finger joints (common in sports), hip (may occur after total hip replacement). DISLOCATION IS AN ORTHOPEDIC URGENCY because the displaced bone can compress or stretch nearby blood vessels and nerves, causing ischemia and neurovascular damage. Assessment and management: 1. Assess neurovascular status immediately (pulses, sensation, movement, color, temperature) 2. IMMOBILIZE THE JOINT IN THE POSITION FOUND — do NOT attempt to force it back into place (this can cause fractures, vascular injury, or nerve damage) 3. Apply ice to reduce swelling 4. Prepare for reduction by the physician (closed reduction under anesthesia or sedation) 5. Post-reduction: reassess neurovascular status and apply a sling or splint

Amputation and Phantom Limb Pain

Amputation is the surgical removal of a limb or part of a limb. It is most commonly performed for PERIPHERAL VASCULAR DISEASE (the most common cause in the Philippines, particularly in poorly controlled diabetic patients with gangrene), DIABETES MELLITUS (diabetic foot complications), severe TRAUMA, uncontrolled INFECTION (osteomyelitis, gas gangrene), or MALIGNANCY (bone tumors). LEVELS OF AMPUTATION: - Below-the-knee (BKA / transtibial) — preserves the knee joint; better prosthetic outcomes - Above-the-knee (AKA / transfemoral) — removes the knee; more energy required for ambulation - Below-the-elbow (transradial) and above-the-elbow (transhumeral) — upper extremity amputations POSTOPERATIVE NURSING CARE: 1. HEMORRHAGE MONITORING — Keep a TOURNIQUET at the bedside at all times. If the stump bleeds massively (catastrophic hemorrhage), apply the tourniquet proximal to the stump immediately and call for help. Monitor the dressing for blood saturation; marking the stump dressing to track bleeding spread is standard practice. 2. RESIDUAL LIMB POSITIONING TO PREVENT CONTRACTURES: - FIRST 24 HOURS: Elevate the residual limb on a pillow to reduce edema (gravity helps venous return) - AFTER 24 HOURS: Do NOT keep the stump elevated on a pillow. Prolonged elevation promotes HIP FLEXION CONTRACTURE (AKA) or KNEE FLEXION CONTRACTURE (BKA), which makes prosthesis use difficult. - Encourage the patient to lie PRONE (face down) for 20–30 minutes several times daily to PREVENT HIP FLEXION CONTRACTURE — the hip extensors are stretched in the prone position. - Do NOT place pillows UNDER THE STUMP for prolonged periods. - Do NOT place pillows BETWEEN THE THIGHS after lower extremity amputation — this promotes HIP ABDUCTION CONTRACTURE. 3. RESIDUAL LIMB (STUMP) CARE: - Wash and dry the stump gently but thoroughly - SHRINK AND SHAPE the stump with an elastic bandage (figure-8 wrapping technique) or a shrinker sock to prepare for prosthesis fitting - Figure-8 wrapping: wrap DISTAL to PROXIMAL to reduce edema and shape the stump into a conical (tapered) shape ideal for prosthesis fitting - Inspect stump skin daily for breakdown, infection, or contact dermatitis 4. MOBILITY AND REHABILITATION: Encourage turning, sitting up, and transfers early. Upper extremity strengthening is crucial for crutch walking and wheelchair mobility. 5. PSYCHOSOCIAL CARE: Amputation involves profound grief over BODY IMAGE CHANGE and loss of function. Apply Kübler-Ross stages of grief: denial, anger, bargaining, depression, acceptance. Allow the patient to express feelings. Include the patient in care decisions. Referral to a rehabilitation team, prosthetic services, and support groups is essential. PHANTOM LIMB PAIN (PLP): After amputation, most patients report PHANTOM LIMB SENSATION — the perception that the amputated part is still present. When this sensation is painful, it is called PHANTOM LIMB PAIN. IMPORTANT FACTS: - Phantom limb pain is REAL — it is a physiologic phenomenon caused by the reorganization of the central nervous system (brain still has neural pathways mapped to the amputated limb) - It is NOT imaginary, NOT fabricated, and NOT a psychiatric symptom - It is most intense and common in the EARLY POSTOPERATIVE period, often within the first few days to weeks - NURSING OBLIGATION: ACKNOWLEDGE AND VALIDATE the patient's pain. Never dismiss it with statements like 'that's impossible, your leg is gone' MANAGEMENT OF PLP: - PHARMACOLOGICAL: opioid analgesics, GABAPENTIN or PREGABALIN (anticonvulsants that modulate neural pain pathways), TRICYCLIC ANTIDEPRESSANTS (amitriptyline), NMDA receptor antagonists (ketamine) - NON-PHARMACOLOGICAL: MIRROR THERAPY (placing a mirror so the intact limb appears to be in place of the amputated one — 'fools' the brain and reduces pain), TENS (Transcutaneous Electrical Nerve Stimulation), relaxation techniques, distraction, and desensitization exercises

The BP of 90/60 and HR of 120, combined with pallor and diaphoresis, indicate CLASS III HYPOVOLEMIC SHOCK. A femur fracture can cause 1–2 liters of blood loss into the thigh. Using Maslow's hierarchy, circulation (physiologic survival) is the HIGHEST priority. The fracture is important but secondary to treating life-threatening hemorrhagic shock. This question tests ABCs and Maslow prioritization — the foundation of NLE clinical judgment questions.

Paresthesia (numbness), pain worse than before, and pallor after cast application are classic early signs of compartment syndrome — 3 of the 6 Ps are present. The nurse should: (1) Notify physician immediately, (2) Keep the limb at HEART LEVEL (do NOT elevate), (3) Do NOT apply ice, (4) Prepare to bivalve the cast as ordered. Waiting is dangerous because irreversible damage occurs within 4–6 hours.

All three elements of the classic FES triad are present: (1) Hypoxemia (SpO₂ 89%, tachypnea RR 28), (2) Neurological change (sudden confusion), and (3) Petechial rash (pinpoint spots on upper chest). The timing (42 hours = within 24–72 hour window) confirms FES after a pelvic fracture. Oxygen is the priority because hypoxemia is the immediate life threat. Head of bed should be elevated and the physician notified urgently.

In the hard callus stage (weeks 3–6), osteoblasts deposit woven (immature) bone to replace the soft fibrocartilaginous callus. This process of mineralization requires calcium as the primary mineral and vitamin D to facilitate calcium absorption from the gut. Protein is critical for the organic matrix (collagen) formation in the earlier soft callus stage.

The expanding blood-soaked dressing is the immediate life-threatening concern and takes priority over positioning. A tourniquet must always be kept at the bedside for exactly this situation. The prolonged stump elevation addresses the secondary concern of contracture prevention. This question tests both hemorrhage emergency response and positioning knowledge.

Like a green (immature) bamboo stalk that bends and splinters on one side rather than breaking cleanly, children's bones bend and crack incompletely under force. Adult bones are more brittle and tend to complete fractures under similar forces. This is a classic NLE identification question using a relatable pediatric scenario.