ICU · Trauma
Chest trauma and blunt cardiac injury in ICU
Also known as Chest trauma · Blunt cardiac injury · Cardiac contusion · Flail chest · Pulmonary contusion · Traumatic aortic injury · Thoracic trauma
Chest trauma: blunt (motor vehicle crash, fall, crush — most) or penetrating (stab, gunshot). ICU-relevant: (1) FLAIL CHEST — ≥3 consecutive ribs fractured in ≥2 places → paradoxical chest wall movement → respiratory failure. (2) PULMONARY CONTUSION — lung parenchymal injury → alveolar haemorrhage/oedema → hypoxia, evolves over the first 24-72 h (peak ~72 h). (3) BLUNT CARDIAC INJURY (BCI) — myocardial contusion → arrhythmia, troponin elevation, rarely cardiac rupture/failure; EAST screening = ECG + troponin I. (4) TRAUMATIC AORTIC INJURY — deceleration → aortic transection (most die at scene, survivors need urgent repair). (5) TENSION PNEUMOTHORAX/HAEMOTHORAX — life-threatening, needle decompression/chest drain. Management: ABCDE, analgesia (epidural/paravertebral for rib fractures), lung-protective ventilation if needed (flail chest/pulmonary contusion), chest drains for pneumo/haemothorax, surgical fixation of flail chest (controversial).
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Target exams
Red flags
- Pulmonary contusion WORSENS over 24-48h — monitor closely, may need intubation
- Tension pneumothorax — immediate needle decompression (don't wait for CXR)
- Traumatic aortic injury — widened mediastinum on CXR → urgent CT angiography → surgical/TEVAR repair
- Blunt cardiac injury — monitor ECG 24-48h, troponin, echocardiography
- Commotio cordis — blunt precordial impact triggering instant VF in a structurally normal heart → immediate CPR + defibrillation
- Retained haemothorax — undrained blood after 2-3 days → empyema/fibrothorax → early VATS
- Tracheobronchial injury — persistent massive air leak / lung fails to re-expand → bronchoscopy, surgical repair
- Blunt oesophageal injury — delayed diagnosis → mediastinitis/sepsis → contrast oesophagography + early surgical repair
| Injury | Mechanism | Key features | Management |
|---|---|---|---|
| Flail chest | ≥3 consecutive ribs fractured in ≥2 places | Paradoxical chest wall movement, severe pain, respiratory failure | Analgesia (epidural), ventilation if respiratory failure, surgical fixation (selected) |
| Pulmonary contusion | Direct impact → alveolar haemorrhage | Hypoxia WORSENS 24-48h, diffuse infiltrates | Oxygen, lung-protective ventilation if severe, avoid fluid overload |
| Blunt cardiac injury | Direct impact to heart | Troponin elevated, arrhythmia (AF, VT, heart block), rarely pump failure | ECG monitoring 24-48h, troponin, echo, treat arrhythmia |
| Traumatic aortic injury | Deceleration → aortic transection | Widened mediastinum, haemothorax, BP differential | CT angiography → TEVAR (endovascular) or open repair |
| Tension pneumothorax | Air under pressure in pleura | Hypotension, tracheal deviation, absent breath sounds | IMMEDIATE needle decompression (2nd ICS MCL), then chest drain |
| Haemothorax | Bleeding into pleural space | Dullness, decreased breath sounds, hypovolaemia | Chest drain (large bore), thoracotomy for massive initial drainage or ongoing bleeding |
- PRIMARY SURVEY (ABCDE) — airway (cervical spine control), breathing (oxygen, assess for tension pneumo/haemothorax — needle decompress if needed), circulation (IV access, fluids/blood — control bleeding), disability (GCS), exposure
- IMAGING — CXR (pneumothorax, haemothorax, rib fractures, widened mediastinum, pulmonary contusion). CT chest (definitive — CT is highly sensitive for pulmonary contusion and predicts the need for intubation; also aortic injury, sternal fracture, spine). FAST/CT abdomen (multi-system injury is common — in a nationwide sternal-fracture cohort, rib fractures co-existed in 51%, spinal fractures 36%, lung contusion 18%)
- RIB FRACTURES — ANALGESIA is KEY — (a) Epidural or paravertebral block (BEST — allows deep breathing/coughing). (b) PCA morphine/fentanyl. (c) Paracetamol, NSAIDs (if no contraindication). Poor analgesia → splinting → atelectasis → pneumonia. Elderly with rib fractures: HIGH mortality — in a modern geriatric (≥65) cohort mortality was 9% overall, 20.6% with over 6 rib fractures, rising further with each additional fracture beyond six
- PULMONARY CONTUSION — monitor for deterioration over the first 24-72 h — (a) Serial CXR/CT (worsening infiltrates; symptoms typically peak at about 72 h and resolve within about 7 days). (b) Oxygen (HFNC if moderate). (c) Intubate for progressive respiratory failure: refractory hypoxaemia, exhaustion, rising PaCO2. (d) Lung-protective ventilation (low tidal volumes, plateau-pressure limitation). (e) CONSERVATIVE FLUIDS (avoid overload — worsens contusion)
- BLUNT CARDIAC INJURY — ECG + troponin I (EAST) — (a) Admission ECG AND troponin I for every patient with suspected BCI — ECG ALONE is not sufficient to rule out BCI. (b) BCI is ruled out only if BOTH ECG and troponin I are normal. (c) New ECG changes and/or elevated troponin → admit for continuous cardiac monitoring. (d) Echocardiography is NOT a screening tool — reserve for hypotension and/or arrhythmia. (e) Treat arrhythmia per ACLS
- SURGICAL — (a) Chest drain (pneumothorax/haemothorax). (b) Thoracotomy (massive initial haemothorax drainage or ongoing bleeding — operative thresholds are well defined in the literature — great vessel injury, tracheobronchial injury). (c) TEVAR (traumatic aortic injury — endovascular stent graft — SVS guideline data show lower mortality than open repair: 9% vs 19%, and 46% with nonoperative management). (d) Surgical rib fixation (flail chest — selected)
SAQ — Severe blunt chest trauma with pulmonary contusion and BCI
10 minutes · 10 marks
A 62-year-old man (60 kg) is admitted after a high-speed motor vehicle crash in which he struck the steering wheel. Initial GCS 15, RR 28, SpO₂ 90% on 15 L O₂, BP 105/68, HR 110 (sinus), ST elevation of 1 mm in V2–V4 on ECG, troponin 0.4 μg/L, CXR with patchy opacification in the right mid-zone. He has right-sided rib fractures 4–7. CT chest confirms right pulmonary contusion and possible myocardial contusion.
SAQ — Traumatic aortic injury — beta-blocker first
10 minutes · 10 marks
A 35-year-old man is admitted after a high-speed motorcycle crash with a steering-wheel-like handlebar impact to the chest. GCS 15, BP 165/95, HR 122, RR 26, SpO₂ 96%. Contrast-enhanced CT chest shows a peri-aortic haematoma at the isthmus with intimal flap and pseudoaneurysm consistent with a grade III blunt thoracic aortic injury (BTAI).
Clinical pearls
References31ShowHide
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