Penetrating Chest Trauma

1. History

• Mechanism of injury (MOI): Stab wound vs. gunshot wound (GSW) vs. impalement — determines energy transfer, trajectory, and expected injury pattern. GSWs carry higher kinetic energy and more unpredictable trajectories [1-2]
• Weapon details: Blade length, caliber, number of shots/stabs, distance from shooter
• Time of injury: Critical for TXA eligibility (must be within 3 hours, ideally <1–2 hours) [3-4]
• Body position at time of injury: Affects trajectory — the "cardiac box" may be violated even when external wounds appear outside classic borders [1]
• Number and location of wounds: Entry and exit wounds; mark all with radiopaque markers [2]
• Symptoms: Dyspnea, chest pain, hemoptysis, difficulty breathing, lightheadedness
• Prehospital interventions: Tourniquet, chest seal, needle decompression, IV access, blood products given
• Important negatives: Loss of consciousness, abdominal pain (up to 20% of penetrating chest injuries have associated abdominal injuries) [1]

2. Alarm Features

• Hemodynamic instability: SBP <90 mmHg, HR >110 bpm — defines unstable patient requiring immediate intervention [2]
• Tension pneumothorax/hemothorax: Hypotension, tracheal deviation, JVD, absent breath sounds, cyanosis — requires emergent decompression even prehospitally [5]
• Beck's triad (cardiac tamponade): Hypotension, muffled heart sounds, JVD [6]
• Massive hemothorax: >1,500 mL initial chest tube output or >200 mL/h for 3 consecutive hours → operative thoracotomy [5][7]
• Traumatic cardiac arrest: Penetrating mechanism with <15 min CPR → resuscitative thoracotomy indicated [8-9]
• Sucking chest wound: Open pneumothorax with audible air movement through wound
• Subcutaneous emphysema: Suggests airway or esophageal injury
• Hemoptysis: Suggests tracheobronchial or parenchymal injury
• Wounds in the "cardiac box" (sternal notch to xiphoid, between nipple lines): High risk for cardiac/great vessel injury [1-2]
• Thoracoabdominal wounds (below nipple/4th rib anteriorly, below scapular tip posteriorly): Risk of diaphragmatic and abdominal organ injury [2]

3. Medications

• Tranexamic acid (TXA): 1 g IV bolus over 10 min, followed by 1 g IV over 8 hours. Must be given within 3 hours of injury (ideally <90 min); greatest mortality benefit when given earliest. Conditionally recommended by EAST, NAEMSP/ACEP/ACS-COT [3][10-11]
• Massive transfusion protocol (MTP): Balanced resuscitation with 1:1:1 ratio of pRBCs:FFP:platelets [7]
• Antibiotic prophylaxis: Indicated for penetrating injuries requiring chest tube placement and all operative cases [5]
• Analgesics: Adequate pain control is essential for respiratory mechanics — multimodal approach (avoid oversedation in spontaneously breathing patients)
• Avoid: Excessive crystalloid resuscitation (permissive hypotension with target SBP ~90 mmHg until hemorrhage control in actively bleeding patients)

4. Diet

• NPO on arrival — anticipate potential operative intervention
• Post-stabilization: Resume diet as tolerated once esophageal injury excluded and operative plans clarified

5. Review of Systems

• Respiratory: Dyspnea, pleuritic chest pain, hemoptysis, cough
• Cardiovascular: Palpitations, syncope, presyncope
• GI: Abdominal pain, dysphagia, odynophagia (esophageal injury)
• Neurologic: Altered mental status, extremity weakness (spinal cord involvement)
• Musculoskeletal: Shoulder pain (diaphragmatic irritation/referred pain)
• Psychiatric: Suicidal intent (self-inflicted), assault context

6. Collateral History and Family History

• Collateral: EMS report (prehospital vitals, interventions, estimated blood loss, GCS at scene, CPR duration), bystander/law enforcement account of mechanism
• Social context: Assault, self-harm, domestic violence — triggers social work, psychiatry, and law enforcement involvement
• Anticoagulant/antiplatelet use: Increases hemorrhage risk
• Family history: Generally not acutely relevant, but bleeding disorders (hemophilia, von Willebrand disease) may impact management

7. Risk Factors

• Young males (highest incidence demographic)
• Urban setting, interpersonal violence
• Substance use (alcohol, drugs) — may mask symptoms and alter exam reliability
• Occupational hazards (military, law enforcement)
• Self-harm/suicide attempts
• Anticoagulant therapy

8. Differential Diagnosis

The primary concern is identifying the specific intrathoracic injury pattern. Key injuries to consider:

• Hemothorax / hemopneumothorax — most common complication of penetrating chest trauma [12-13]
• Pneumothorax (simple, tension, open) — risk up to 50% in severe chest trauma [5]
• Cardiac injury / tamponade — overall survival only ~19% for penetrating cardiac injuries; ~40% of those reaching a trauma center survive [14]
• Great vessel injury (aorta, subclavian, pulmonary vessels)
• Diaphragmatic injury — especially left lower thoracic wounds; easily missed on CXR [5]
• Tracheobronchial injury — suspect with persistent air leak, massive subcutaneous emphysema
• Esophageal perforation — suspect with mediastinal air, left pleural effusion
• Lung parenchymal injury (contusion, laceration)
• Air embolism — rare but rapidly fatal; suspect with sudden cardiovascular collapse after penetrating lung injury [5]
• Associated abdominal injuries — present in up to 20% of cases [1]

9. Past Medical History

• Prior thoracic surgery (adhesions complicate chest tube placement and surgery) [5]
• Chronic lung disease (emphysema, COPD — increased risk of respiratory failure)
• Bleeding disorders or anticoagulant use
• Previous pneumothorax
• Cardiac history
• Spinal cord injury (impaired respiratory mechanics) [5]

10. Physical Exam

• Primary survey (ATLS): Airway, Breathing, Circulation, Disability, Exposure
• Vital signs: BP, HR, RR, SpO2, temperature — hemodynamic stability defined as SBP ≥90 and HR 50–110 [2]
• Inspection: Number, location, and size of wounds; entry/exit wounds; sucking wounds; chest wall asymmetry; JVD; tracheal position; subcutaneous emphysema
• Auscultation: Decreased/absent breath sounds (PTX, HTX); muffled heart sounds (tamponade)
• Percussion: Hyperresonance (PTX) vs. dullness (HTX)
• Palpation: Subcutaneous crepitus, chest wall instability, tenderness
• Back and axillae: Must log-roll — posterior wounds are easily missed
• Abdomen: Mandatory exam — thoracoabdominal injuries are common
• Clinical exam alone can be incorrect in up to one-third of cases for hemothorax/pneumothorax [1]

11. Lab Studies

• Type and crossmatch — immediate, anticipate MTP
• CBC: Baseline hemoglobin/hematocrit (serial monitoring)
• BMP: Electrolytes, renal function
• Coagulation studies: PT/INR, PTT, fibrinogen
• ABG/VBG: Lactate (marker of perfusion/shock severity), base deficit, pH
• Viscoelastic testing (TEG/ROTEM): Guide transfusion in massive hemorrhage; additional TXA if clot lysis at 30 min >10% [7]
• Troponin: If cardiac injury suspected
• Blood alcohol level / urine drug screen: Assess for intoxication affecting exam reliability

12. Imaging

• Unstable patient: E-FAST and/or portable CXR at bedside — do not delay resuscitation for imaging [5]
  • E-FAST: 98% sensitivity, ~100% specificity for free fluid; more sensitive and faster than CXR for hemothorax (97.5% vs. 92.5%) [5]
  • Cardiac FAST view critical for hemopericardium in cardiac box injuries — positive FAST → emergent surgery [1]
  • FAST may be falsely negative if cardiac injury decompresses into the hemithorax [1]
• Stable patient: Contrast-enhanced CT chest is the imaging modality of choice
  • Negative predictive value up to 99% for excluding surgical pathology [2][15]
  • Identifies vascular injuries (pseudoaneurysms, intimal flaps, contrast extravasation), trajectory, mediastinal injury, diaphragmatic injury [2]
  • CT can identify injuries missed in 71% of patients with normal CXR, and 37.5% of those may require life-saving interventions [5]
  • For uncertain trajectory or multiple entry points: CT chest/abdomen/pelvis with IV contrast [2]
• CXR: Useful for rapid triage (PTX, HTX, foreign bodies, tube position); sensitivity for supine PTX only 28–75% [5]
• Repeat CXR: If initial CXR normal in stable patient with nonmediastinal penetrating trauma, repeat at 3–6 hours (some data support as early as ~1 hour) [1][16-17]
• CT imaging is NOT indicated in hemodynamically unstable patients — proceed directly to intervention [5]

13. Special Tests

• E-FAST: Point-of-care triage tool — hemopericardium, pneumothorax, free fluid [2][5]
• Bronchoscopy: Gold standard for tracheobronchial injuries (90% sensitivity); indicated with persistent air leak or subcutaneous emphysema [5]
• Esophagoscopy / contrast CT: For suspected esophageal perforation [5]
• CT angiography (CTA): Preferred for diagnosing vascular injuries and planning intervention [5]
• Transesophageal echocardiography: For air embolism detection (microbubbles in heart/great vessels) [5]
• Diagnostic pericardial window: Largely supplanted by FAST but may be used if FAST equivocal [1]

14. ECG

• Indications: All penetrating chest trauma patients, especially cardiac box injuries
• Findings to recognize:
  • ST changes (myocardial injury/ischemia from coronary laceration)
  • Low voltage / electrical alternans (pericardial effusion/tamponade)
  • New arrhythmias (PVCs, atrial fibrillation, ventricular tachycardia)
  • Pulseless electrical activity (PEA) — consider tamponade, tension PTX, hypovolemia
  • Right heart strain pattern (acute right-sided injury)

15. Assessment

Penetrating chest trauma is a heterogeneous, time-critical emergency requiring immediate stratification by hemodynamic status. The majority (~85%) of cases can be managed with tube thoracostomy alone, but approximately 10–15% require operative intervention. [12][15] Key decision points:

• Hemodynamically unstable → immediate intervention (chest tube, thoracotomy, or resuscitative thoracotomy)
• Hemodynamically stable → systematic imaging workup (E-FAST → CXR → CT with IV contrast)
• Wound location determines injury risk: cardiac box → cardiac injury; thoracoabdominal zone → diaphragmatic/abdominal injury; lateral hemithorax → lung/chest wall injury
• Complications include retained hemothorax, empyema, ARDS, missed diaphragmatic injury, and delayed pneumothorax

16. Treatment Plan

Initial stabilization (ATLS approach)

• Airway management with C-spine precautions
• Bilateral finger thoracostomies if in cardiac arrest [18-19]
• Needle decompression or finger thoracostomy for tension PTX
• Three-sided occlusive dressing for open/sucking chest wound, followed by tube thoracostomy [5][20]
• Direct pressure for external hemorrhage
• Two large-bore IVs; activate MTP if hemorrhagic shock

Tube thoracostomy

• Pneumothorax: Small-bore (8.5–24 Fr) or pigtail catheters are acceptable [5]
• Hemothorax: Large-bore (28–40 Fr) traditionally recommended; however, recent evidence shows 14 Fr pigtail catheters are equally effective as 28–32 Fr tubes with better patient tolerance [5][21-22]
• Placement: 4th–6th intercostal space, anterior/mid-axillary line [5]
• Irrigation with warm sterile saline at time of placement decreases secondary interventions [13]
• Hemothorax ≥300–500 mL should be drained [5][13]
• Pneumothorax >35 mm on CT or >20% thoracic volume on CXR → tube thoracostomy; smaller may be observed (~10% failure rate) [13]

Tranexamic acid: 1 g IV bolus → 1 g over 8 hours, within 3 hours of injury [3][7]

Operative indications: [5][7][9]

• Hemodynamic instability with active intrathoracic bleeding
• Initial chest tube output >1,500 mL
• Ongoing output >200 mL/h for 2–4 consecutive hours
• Cardiac tamponade (positive FAST in unstable patient → OR)
• Large persistent air leak, diaphragmatic injury, esophageal/bronchial tears
• Retained hemothorax not amenable to drainage

Resuscitative thoracotomy (RT): [8-9]

• Indicated for SBP <60 mmHg or traumatic cardiac arrest with <15 min CPR (penetrating)
• Survival ~35% for penetrating cardiac wounds with tamponade, ~15% overall for penetrating trauma
• Blunt trauma: <2% survival — much less favorable
• Technique: Left anterolateral thoracotomy → pericardiotomy → cardiac repair → open cardiac massage → aortic cross-clamp

The following figure from Perkins et al. illustrates outcomes of prehospital resuscitative thoracotomy stratified by cause and duration of cardiac arrest, demonstrating that survival is highest with isolated cardiac tamponade treated within minutes: [19]

17. Disposition

• Admission / ICU criteria:
  • Hemodynamic instability or requiring resuscitation
  • Chest tube placement with ongoing drainage
  • Operative intervention
  • Cardiac box or mediastinal trajectory injuries
  • Significant parenchymal injury on CT
  • Intubated or requiring ventilatory support
• Observation (ED or short-stay unit):
  • Stable patient with small/occult PTX being observed without chest tube (minimum 24 hours) [5]
  • Stable patient with normal initial CXR — repeat CXR at 3–6 hours (some evidence supports ~1 hour if asymptomatic) [16-17]
• Discharge criteria:
  • Asymptomatic with two normal serial CXRs (initial + repeat at 3–6 hours) [1][16]
  • No evidence of PTX, HTX, or other injury on imaging
  • Hemodynamically stable, no respiratory distress
  • Reliable patient with ability to return
  • CT negative for surgical pathology (NPV 99%) [15]
• Specialist consultation triggers: Trauma surgery (all cases), cardiothoracic surgery (cardiac/great vessel/hilar injuries), interventional radiology (endovascular hemorrhage control), vascular surgery

18. Follow Up / Return Precautions

• Follow-up: Trauma surgery clinic within 1–2 weeks; repeat CXR to confirm resolution of PTX/HTX and lung re-expansion
• Chest tube removal: When output <200 mL/day, no air leak, and lung fully expanded on imaging
• Return immediately for: Increasing shortness of breath, chest pain, fever, wound drainage/redness, lightheadedness, hemoptysis, or feeling faint
• Expected recovery: Most isolated penetrating chest injuries managed with tube thoracostomy alone recover well. Early mobilization and pulmonary rehabilitation (incentive spirometry, deep breathing, coughing exercises) improve outcomes [5]
• Delayed complications to counsel about: Retained hemothorax, empyema (especially with incomplete HTX evacuation), delayed pneumothorax, post-traumatic stress disorder
• Social considerations: If assault or self-harm, ensure appropriate safety planning, social work, and psychiatric evaluation prior to discharge

References

1. Best Practices Guidelines In Imaging. — Gail T. Tominaga MD FACS, Mark Bernstein MD, Michael R. Aquino MD MHSc, et al American College of Surgeons (2018). 2018.

2. ACR Appropriateness Criteria® Penetrating Torso Trauma. — Lee JT, Sobieh A, Bonne S, et al. Journal of the American College of Radiology : JACR. 2024.

3. Initial Care of the Severely Injured Patient. — King DR. The New England Journal of Medicine. 2019.

4. Tranexamic Acid for Trauma: Optimal Timing of Administration Based on the CRASH-2 and CRASH-3 Trials. — Osawa I, Goto T, Roberts I. The British Journal of Surgery. 2025.

5. Thoracic Trauma WSES-AAST Guidelines. — Coccolini F, Cremonini C, Moore EE, et al. World Journal of Emergency Surgery : WJES. 2025.

6. Cardiac Tamponade. — Adler Y, Ristić AD, Imazio M, et al. Nature Reviews. Disease Primers. 2023.

7. American Association for the Surgery of Trauma/­American College of Surgeons Committee on Trauma: Clinical Protocol for Damage-Control Resuscitation for the Adult Trauma Patient. — LaGrone LN, Stein D, Cribari C, et al. The Journal of Trauma and Acute Care Surgery. 2024.

8. Resuscitative Thoracotomy: What You Need to Know. — Dewey MG, Moore EE, Sauaia A, Moore HB. The Journal of Trauma and Acute Care Surgery. 2025.

9. Western Trauma Association Critical Decisions in Trauma: Resuscitative Thoracotomy. — Burlew CC, Moore EE, Moore FA, et al. The Journal of Trauma and Acute Care Surgery. 2012.

10. The Use of Tranexamic Acid in the Management of Injured Patients at Risk of Hemorrhage: A Systematic Review and Meta-Analysis and an Eastern Association for the Surgery of Trauma Practice Management Guideline. — Dumas RP, Succar BE, Vella MA, et al. The Journal of Trauma and Acute Care Surgery. 2025.

11. Tranexamic Acid in Trauma: A Joint Position Statement and Resource Document of NAEMSP, ACEP, and ACS-COT. — Barrett WJ, Kaucher KA, Orpet RE, et al. The Journal of Trauma and Acute Care Surgery. 2025.

12. Management of Penetrating Stab Wounds of the Chest: An Assessment of the Indications for Early Operation. — Sandrasagra FA. Thorax. 1978.

13. Traumatic Pneumothorax and Hemothorax: What You Need to Know. — Blank JJ, de Moya MA. The Journal of Trauma and Acute Care Surgery. 2025.

14. Penetrating Cardiac Injuries: What You Need to Know. — Parreira JG, Coimbra R. The Journal of Trauma and Acute Care Surgery. 2025.

15. Thoracic Computed Tomography Is an Effective Screening Modality in Patients With Penetrating Injuries to the Chest. — Strumwasser A, Chong V, Chu E, Victorino GP. Injury. 2016.

16. Prospective Evaluation of Early Follow-Up Chest Radiography After Penetrating Thoracic Injury. — Berg RJ, Inaba K, Recinos G, et al. World Journal of Surgery. 2013.

17. Observation Period for Asymptomatic Penetrating Chest Trauma: 1 or 3 H?. — Seidzadeh Gooklan L, Yari A, Mayel M, et al. European Journal of Trauma and Emergency Surgery : Official Publication of the European Trauma Society. 2018.

18. Cardiopulmonary Resuscitation in Special Circumstances. — Soar J, Becker LB, Berg KM, et al. Lancet. 2021.

19. Prehospital Resuscitative Thoracotomy for Traumatic Cardiac Arrest. — Perkins ZB, Greenhalgh R, Ter Avest E, et al. JAMA Surgery. 2025.

20. 2024 American Heart Association and American Red Cross Guidelines for First Aid. — Hewett Brumberg EK, Douma MJ, Alibertis K, et al. Circulation. 2024.

21. Small Versus Large-Bore Thoracostomy for Traumatic Hemothorax: A Systematic Review and Meta-Analysis. — Lyons NB, Abdelhamid MO, Collie BL, et al. The Journal of Trauma and Acute Care Surgery. 2024.

22. The Small (14 Fr) Percutaneous Catheter (P-Cat) Versus Large (28-32 Fr) Open Chest Tube for Traumatic Hemothorax: A Multicenter Randomized Clinical Trial. — Kulvatunyou N, Bauman ZM, Zein Edine SB, et al. The Journal of Trauma and Acute Care Surgery. 2021.