Rib fractures are among the most common injuries from blunt thoracic trauma, occurring in up to 40% of trauma patients, with an overall mortality of approximately 10%. [1] Morbidity and mortality primarily derive from pain-induced hypoventilation leading to pneumonia, atelectasis, ARDS, and respiratory failure. [2-3] Patients ≥65 years, with ≥3 fractures, or with underlying cardiopulmonary disease are at greatest risk. [3]
1. History
- Mechanism: Direct blow, fall (including ground-level in elderly), MVC, crush injury, CPR, sports, or pathologic (cough, minimal trauma in osteoporotic patients)
- Pain characterization: Sharp, well-localized, pleuritic (worse with deep breathing, coughing, sneezing, twisting), point tenderness over fracture site
- Timing: Acute onset with trauma; delayed presentation possible with stress fractures or occult fractures
- Severity/progression: Pain typically peaks days 2–3; worsening dyspnea or pain may signal developing hemothorax or pneumothorax [4]
- Associated symptoms: Dyspnea, splinting, inability to take deep breaths, cough
- Important negatives: Absence of hemoptysis, syncope, abdominal pain, neurologic deficits
2. Alarm Features
- Respiratory distress: Tachypnea, hypoxia, accessory muscle use, inability to speak in full sentences
- Hemodynamic instability: Tachycardia, hypotension → suspect tension pneumothorax or massive hemothorax [5]
- Flail chest: Paradoxical chest wall movement (≥3 consecutive ribs fractured in ≥2 places) — associated with pneumothorax/hemothorax in ~70% and pulmonary contusion in ~46% [6-7]
- Subcutaneous emphysema: Suggests pneumothorax or tracheobronchial injury
- First/second rib fractures: Associated with 4.4× odds of great vessel injury and higher mortality (7.4% vs 4.1%) [8]
- Lower rib fractures (ribs 9–12): High association with abdominal solid organ injury (liver, spleen, kidney) — up to 51% in one series [9-10]
- Bilateral rib fractures: Independent risk factor for intra-abdominal injury [11]
- Worsening pain or dyspnea days after injury: Delayed hemothorax risk, especially with displaced fractures, initial hemothorax/pneumothorax, and older age [4]
3. Medications
- Multimodal analgesia is the cornerstone per ACS Best Practices Guidelines: [3]
- Scheduled acetaminophen (1g PO q6h)
- Scheduled NSAIDs (ibuprofen 400–600mg q6–8h or ketorolac 15–30mg IV); use COX-2 inhibitor if regional block planned
- Muscle relaxants (e.g., methocarbamol, cyclobenzaprine) — evidence suggests reduced LOS and respiratory complications [3]
- Lidocaine patch 5% if regional analgesia cannot be administered
- Opioids: Start oral; escalate to IV PRN → PCA if needed; minimize in elderly due to delirium, respiratory depression, falls [1][3]
- Adjuncts:
- Low-dose ketamine (0.3 mg/kg IV over 15 min): Non-inferior to morphine, opioid-sparing, but higher psycho-perceptual side effects [1]
- Dexmedetomidine: Selective α-2 agonist with analgesic/anxiolytic properties, no respiratory depression; emerging evidence in non-intubated rib fracture patients [12]
- Contraindicated/caution: Avoid excessive opioids in elderly; avoid NSAIDs in renal impairment, GI bleeding risk, or if epidural/paravertebral block planned (platelet inhibition)
4. Diet
- No specific dietary triggers
- Adequate hydration and nutrition to support healing
- Calcium and vitamin D supplementation if osteoporosis suspected or confirmed [13-14]
- Avoid excessive alcohol (risk factor for falls and osteoporosis)
- Encourage adequate protein intake for bone healing
5. Review of Systems
- Pulmonary: Dyspnea, cough, hemoptysis, pleuritic pain
- Cardiovascular: Palpitations, syncope, chest pressure (rule out cardiac etiology)
- GI: Abdominal pain (lower rib fractures → solid organ injury) [9-10]
- Neurologic: Paresthesias, weakness (spinal injury with posterior rib fractures)
- MSK: Back pain, shoulder pain, scapular pain
- Constitutional: Fever (pneumonia, empyema), weight loss (pathologic fracture)
6. Collateral History and Family History
- Mechanism details from EMS/witnesses: Speed of MVC, height of fall, assault details
- Anticoagulant use: Increases bleeding risk (hemothorax); warfarin associated with decreased BMD with long-term use [15-16]
- Osteoporosis history: Family history of hip/spine fracture is a major risk factor [13-14]
- Alcohol use: Both acute intoxication (fall risk) and chronic use (osteoporosis)
- Elder abuse or non-accidental trauma: Consider in unexplained or recurrent fractures
- Functional baseline: ADL capacity, fall history, living situation
7. Risk Factors
- Age ≥65 years: Twice the mortality and morbidity of younger patients with similar injuries [2]
- Osteoporosis/low BMD: Each SD decrease in femoral neck BMD → ~2× increased fracture hazard [17]
- Prior rib fracture: 2–5× increased risk of future rib, hip, and wrist fractures [18-19]
- Chronic steroid use, anticonvulsants, long-term anticoagulants [13-14]
- Chronic lung disease (COPD, chronic cough → stress fractures)
- Alcohol use disorder, smoking, low body weight
- High-energy mechanisms: MVC, falls from height, crush injuries
- Cardiopulmonary comorbidities: Increase risk of pulmonary complications [3]
8. Differential Diagnosis
- Costochondritis/Tietze syndrome: Tenderness at costochondral junctions, no fracture on imaging [20]
- Pulmonary embolism: Pleuritic pain, dyspnea, tachycardia; may lack trauma history [21]
- Pneumothorax (spontaneous): Can present without rib fracture
- Myocardial infarction/ACS: 12% of patients with chest wall tenderness in ED had AMI [20]
- Herpes zoster: Dermatomal pain, may precede rash
- Pathologic fracture: Metastatic disease, myeloma, primary bone tumors [22]
- Slipping rib syndrome: Hypermobility of lower costal cartilages, positive hooking maneuver [20]
- Muscle strain/contusion: No bony tenderness, no fracture on imaging
- Thoracic spine fracture: Posterior midline tenderness, radicular symptoms
- Aortic dissection: Severe tearing pain, pulse differential, widened mediastinum
9. Past Medical History
- Prior rib fractures (strong predictor of recurrence) [18-19]
- Osteoporosis or osteopenia
- COPD, asthma, or other chronic lung disease
- Cardiac disease (impacts analgesia choices and disposition)
- Coagulopathy or anticoagulant/antiplatelet therapy
- Prior thoracic surgery
- Malignancy (pathologic fracture risk)
- Chronic steroid use
10. Physical Exam
- Vitals: Tachypnea, tachycardia, hypoxia (SpO₂), hypotension (red flag)
- Inspection: Ecchymosis, abrasions, paradoxical chest wall movement (flail), splinting, asymmetric chest expansion
- Palpation: Point tenderness over fracture site, crepitus, bony step-off, subcutaneous emphysema
- Chest wall compression test: Anteroposterior and lateral compression reproducing pain (low sensitivity but suggestive)
- Auscultation: Decreased breath sounds (hemothorax/pneumothorax), crackles (contusion)
- Percussion: Dullness (hemothorax), hyperresonance (pneumothorax)
- Abdominal exam: Mandatory with lower rib fractures — tenderness, guarding, rebound (solid organ injury) [9-10]
- Spine: Posterior midline tenderness (associated thoracic spine fracture)
- Incentive spirometry volume: Useful for triage and monitoring — compare to predicted volumes [23]
11. Lab Studies
- CBC: Baseline hemoglobin/hematocrit (serial if hemothorax suspected); decreased hematocrit is an independent risk factor for intra-abdominal injury [11]
- BMP: Renal function (NSAID safety), electrolytes
- Coagulation studies: PT/INR if on anticoagulants or suspected coagulopathy
- Type and screen: If significant hemothorax or surgical intervention anticipated
- Lactate: If hemodynamic concern
- Troponin: If cardiac contusion suspected (sternal fracture, high-energy mechanism)
- ABG/VBG: If respiratory compromise or hypoxia
12. Imaging
- First-line: Chest X-ray (PA and lateral) — usually appropriate for initial imaging of suspected rib fractures from minor blunt trauma per ACR Appropriateness Criteria [24-25]
- Sensitivity is limited: up to 50% of rib fractures are missed on CXR; 66% of rib fractures in one large cohort were seen only on CT [8][26]
- Primary value is detecting complications: pneumothorax, hemothorax, pulmonary contusion
- CT chest (with IV contrast): Gold standard — most sensitive and specific for rib fractures and associated injuries [5][27-28]
- Indicated for: ≥3 rib fractures on CXR, lateral/posterior fractures, O₂ requirement, high-energy mechanism, elderly with ≥3 fractures, suspected vascular injury, clinical deterioration [29-30]
- 3D reconstructions valuable for surgical planning [5]
- Ultrasound (E-FAST): Rapid bedside detection of pneumothorax (higher sensitivity than supine CXR) and hemothorax [5][31]
- Rib series radiographs: Generally not recommended — rarely change management [24]
- When imaging is unnecessary: Isolated 1–2 rib fractures from minor trauma with normal CXR, normal exam, and no respiratory compromise in a young, healthy patient [25]
13. Special Tests
- Incentive spirometry: Baseline and serial measurements; used in triage pathways to guide disposition [23]
- STUMBL score: Validated scoring system incorporating age, number of fractures, SpO₂, and other variables to predict complications and guide ED disposition (scores ≥26 associated with ICU admission) [32]
- Rib Injury Guidelines (RIG): Triage tool using age, fracture number, comorbidities, and IS volumes to determine home vs. floor vs. ICU — validated with no readmissions in low-risk group [33]
- Point-of-care ultrasound: For bedside rib fracture identification and pneumothorax/hemothorax detection [5]
- Regional nerve blocks (diagnostic and therapeutic):
- Serratus anterior plane block (SAPB): Significant improvement in pain scores and reduced opioid use; safely performed by EM physicians [2][34]
- Erector spinae plane block (ESPB): Feasible by non-specialized physicians; reduces pain and opioid use [35-36]
14. ECG
- Indications: High-energy mechanism, sternal fracture, suspected cardiac contusion, elderly patients, chest pain atypical for fracture
- Findings to assess: ST changes (contusion, ACS), arrhythmias (atrial fibrillation from contusion), conduction abnormalities
- Not routinely needed for isolated low-energy rib fractures in young patients with classic presentation
15. Assessment
- Severity stratification is critical and should incorporate:
- Number and location of fractures
- Displacement
- Patient age and comorbidities
- Respiratory status (SpO₂, respiratory rate, incentive spirometry)
- Associated injuries
- Typical presentation: Localized chest wall pain worsened by breathing, coughing, and movement after blunt trauma
- Atypical presentations: Elderly with ground-level fall and vague chest pain; stress fractures from chronic cough; pathologic fractures without significant trauma
- Complications: Pneumonia (most common), hemothorax (delayed in up to 7% of cases), pneumothorax, ARDS, respiratory failure, chronic pain, nonunion [2][4][22]
- Mortality increases with each additional rib fracture [12]
16. Treatment Plan
Initial stabilization
- ABCs, supplemental O₂ to maintain SpO₂ >94%
- Emergent needle decompression or chest tube for tension pneumothorax/massive hemothorax [5]
Pain management (multimodal — the cornerstone of treatment): [3][37]
- Scheduled acetaminophen 1g PO/IV q6h
- Scheduled NSAIDs (ibuprofen 400–600mg PO q6–8h or ketorolac 15–30mg IV)
- Muscle relaxant (methocarbamol 750–1500mg PO q6h)
- Lidocaine patch 5% over fracture site
- Opioids PRN (oxycodone 5–10mg PO q4–6h; escalate to IV morphine/hydromorphone PRN)
- Regional analgesia for moderate-severe pain:
- SAPB or ESPB in ED (feasible, safe, effective) [2][34-36]
- Thoracic epidural for bilateral fractures (preferred) [3][38]
- Paravertebral block if epidural contraindicated [3][38]
- Intercostal nerve block with liposomal bupivacaine as alternative [3]
Pulmonary hygiene
- Incentive spirometry (10 breaths every hour while awake)
- Early mobilization
- Cough assistance (splinting with pillow)
- Chest physiotherapy
Surgical stabilization (SSRF) — per WSES-AAST Guidelines: [5][39]
- Flail chest in hemodynamically stable patients
- ≥3 ipsilateral, severely displaced fractures (ribs 3–10) with physiologic derangement
- Severe pain unresponsive to optimal medical management
- Ideally within 48–72 hours of injury
- Contraindicated in hemodynamic instability
17. Disposition
Discharge criteria (low risk): [23][33]
- 1–2 isolated, non-displaced rib fractures
- Young, healthy patient
- Adequate pain control with oral medications
- Normal respiratory status (SpO₂ >95%, adequate IS volumes)
- No associated injuries
- Reliable follow-up and social support
Floor admission: [23][29][33]
- ≥3 rib fractures
- Age ≥65 with any rib fracture
- Inadequate pain control
- Supplemental O₂ requirement
- Associated pneumothorax/hemothorax managed with chest tube
- Significant comorbidities
ICU admission: [29][32-33]
- Flail chest
- Respiratory failure or impending respiratory failure
- Hemodynamic instability
- STUMBL score ≥26 [32]
- Need for mechanical ventilation or high-level respiratory support
- Bilateral rib fractures with significant associated injuries
Specialist consultation triggers
- Trauma surgery: Flail chest, ≥3 displaced fractures, associated intrathoracic/abdominal injuries
- Acute pain service: Refractory pain, need for regional analgesia or PCA
- Pulmonology: Respiratory failure, prolonged ventilator dependence
- Interventional radiology: Active intercostal artery bleeding
18. Follow Up / Return Precautions
Follow-up timing
- Discharged patients: Follow-up in 1–2 weeks with repeat CXR to evaluate for delayed hemothorax or pneumothorax, especially if displaced fractures or initial small effusion [4]
- Patients with ≥2 displaced fractures require close chest radiography follow-up within 2–30 days [4]
- Osteoporosis evaluation in patients with low-trauma rib fractures (DXA scan) — rib fracture is an osteoporotic fracture marker [17-19]
Return precautions — instruct patients to return immediately for:
- Increasing shortness of breath or difficulty breathing
- Worsening chest pain despite medications
- Fever or productive cough (pneumonia)
- Lightheadedness, dizziness, or fainting
- Coughing up blood
Patient counseling
- Pain is expected to peak at days 2–3 and gradually improve over 4–6 weeks; full healing typically 6–8 weeks
- Continue incentive spirometry and deep breathing exercises at home
- Sleep in a comfortable position (semi-upright or on the injured side may help)
- Avoid rib belts or binding (restricts ventilation, increases pneumonia risk)
- Avoid heavy lifting and strenuous activity for 4–6 weeks
- Continue scheduled acetaminophen and NSAIDs; use opioids only for breakthrough pain
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