27: Chest Injuries Cognitive Objectives (1 of 2) 1. Differentiate between a pneumothorax, a hemothorax, a tension pneumothorax, and a sucking chest wound. 2. Describe the emergency medical care of a patient with a flail chest. 3. Describe the emergency medical care of a patient with a sucking chest wound. Cognitive Objectives (2 of 2) 4. Describe the consequences of blunt injury to the heart. 5. List the signs of pericardial tamponade. 6. Discuss complications that can accompany chest injuries. • There are no affective objectives for this chapter. Psychomotor Objectives 7. Demonstrate the steps in the emergency medical care of a sucking chest wound. Organs of the Chest Structures of the Chest Mechanics of Ventilation (1 of 2) • Inspiration – Intercostal muscles contract and diaphragm flattens. • Expiration – Intercostal muscles and diaphragm relax; tissues move back to normal position. Mechanics of Ventilation (2 of 2) • Phrenic nerves exit the spinal cord at C3, C4, and C5. • Spinal cord injury below C5 – Loss of ability to move intercostal muscles – Diaphragm can still contract; patient can still breathe. • Spinal cord injury at C3 or higher – No ability to breathe Spinal Cord Injury Below C5 Injuries to the Chest • Closed chest injuries – Caused by blunt trauma • Open chest injuries – Caused by penetrating trauma Signs and Symptoms • Pain at site of injury • Dyspnea • Pain aggravated by increased breathing • Hemoptysis • Bruising to chest wall • Failure of chest to expand normally • Crepitus with palpation of chest • Rapid, weak pulse and low blood pressure • Penetrating injury to chest • Cyanosis around lips or fingernails • You and your EMT-B partner are dispatched to a construction site where a worker fell on a piece of metal and has an open chest wound. • You arrive and see no scene hazard or need for other resources. You are the Provider • What is the mechanism of injury? • What precautions should you take? You are the provider continued Scene Size-up • • • • • Observe for hazards. Do not disturb potential evidence. Put several pairs of gloves in your pocket. Consider spinal immobilization. Ensure that police are on scene if incident involved violence. • Your partner provides spinal immobilization. • The patient is responsive with an open airway. He says, “I can’t catch my breath. It hurts.” • You find a penetrating injury on the right anterior portion of the chest. • You see a small amount of bleeding. The blood bubbles as your patient breathes. You are the provider continued (1 of 2) • • • • What are the steps of the initial assessment? What life-saving treatments would you provide? What treatment do you provide? Describe the rest of your assessment process after the initial assessment. You are the provider continued (2 of 2) Initial Assessment • General impression – Quickly evaluate ABCs. – Difficulty speaking may indicate several problems. – Patients with significant chest injuries will look sick. • Airway and breathing – Ensure that patient has a clear, patent airway. – Protect the spine. – Inspect for DCAP-BTLS. Inspection • Decreased breath sounds usually indicate significant damage to a lung. • If both sides of chest do not have equal rise and fall, chest muscles have lost ability to work properly. • If one section of chest moves in opposite direction from the rest of the chest (paradoxical motion), this is a life threat. Immediate Interventions • Apply an occlusive dressing to any penetrating chest injury. • Stabilize paradoxical motion with a large bulky dressing and 2'' tape. • Apply oxygen via nonrebreathing mask at 15 L/min. • Provide positive pressure ventilations if breathing is inadequate. Circulation • Assess patient’s pulse. • Consider aggressive treatment for shock. • Internal bleeding can quickly cause death. Transport Decision • Rapidly transport if patient has problems with ABCs. • Pay attention to subtle clues. – Skin signs – Level of consciousness – Sense of impending doom • You ensure that his airway is open. • Breathing is labored; you start oxygen via nonrebreathing mask at 15 L/min. • You quickly assess for DCAP-BTLS; seal sucking chest wound with an occlusive dressing. • You check distal pulse. Skin is clammy. Bleeding is noted and controlled. • High-priority transport You are the provider continued Focused History and Physical Exam • Focused physical exam – For a patient with isolated chest injury and limited MOI • Rapid physical exam – For a patient with a significant MOI – Use DCAP-BTLS. – Do not focus just on the chest wound. • Obtain baseline vital signs. • Obtain SAMPLE history quickly. Interventions • • • • • Provide complete spinal immobilization. Maintain open airway; be prepared to suction. Provide assisted ventilations if needed. Control bleeding. Place occlusive dressing over penetrating chest wound. • Stabilize flail segment with a bulky dressing. • Treat aggressively for shock. • Do not delay transport. Detailed Physical Exam • Perform en route to the hospital if time allows. Ongoing Assessment • Assess effectiveness of interventions. • Reassess vital signs. • Communication and documentation – Communicate with hospital early if patient has significant MOI. – Describe injuries and treatment given. • Patient has a significant MOI; do a rapid physical exam. • Obtain baseline vital signs and SAMPLE history. • Take c-spine precautions and transport continuing oxygen therapy. • Perform detailed physical exam and ongoing assessment en route. You are the provider continued Complications of Chest Injuries A pneumothorax occurs when air leaks into the space between the pleural surfaces. Pneumothorax • Air accumulates in the pleural space. • Air enters through a hole in the chest wall. – The lung may collapse in a few seconds or a few minutes. • An open or penetrating wound to the chest is called a sucking chest wound. Care for Open Pneumothorax • Clear and manage the airway. • Provide oxygen. • Seal an open wound with an occlusive dressing. • Depending on local protocol, tape down all four sides or create a flutter valve. Spontaneous Pneumothorax • Some people are born with or develop weak areas on the surface of the lungs. • Occasionally, the area will rupture spontaneously, allowing air into the pleural space. • Patient experiences sudden chest pain and trouble breathing. • Consider a spontaneous pneumothorax for a patient with chest pain without cause. Tension Pneumothorax (1 of 2) • Can occur from sealing all four sides of the dressing on a sucking chest wound • Can also occur from a fractured rib puncturing the lung or bronchus • Can also result from a spontaneous pneumothorax Tension Pneumothorax (2 of 2) Signs and Symptoms of Tension Pneumothorax • • • • • • • Respiratory distress Distended neck veins Tracheal deviation Tachycardia Low blood pressure Cyanosis Decreased lung sounds Care for Tension Pneumothorax • If a tension pneumothorax develops from sealing an open chest wound, partly remove the dressing to let the air escape. • If there is no open wound, follow local protocol. Hemothorax (1 of 2) • Collection of blood in the pleural space • Suspect if the following are seen: – Signs and symptoms of shock – Decreased breath sounds on affected side • If both air and blood are present in the pleural space, it is a hemopneumothorax. Hemothorax (2 of 2) Rib Fractures • They are very common in the older people. • A fractured rib may lacerate the surface of the lung. • Patients will avoid taking deep breaths and breathing will be rapid and shallow. • The patient often holds the affected side to minimize discomfort. • Administer oxygen. Flail Chest (1 of 2) • Segment of chest wall detached from rest of thoracic cage • Occurs when: – Three or more ribs are fractured in two or more places. – Sternum is fractured along with several ribs. • Creates paradoxical motion Flail Chest (2 of 2) Care for Flail Chest • Maintain airway. • Provide respiratory support with BVM if needed. • Perform ongoing assessments for pneumothorax and other respiratory complications. • Immobilize flail segment. Pulmonary Contusions • Bruising of the lung • Develops over hours • Alveoli fill with blood, and edema accumulates in the lung, causing hypoxia. • Provide oxygen and ventilatory support. Traumatic Asphyxia • Sudden, severe compression of chest • Produces rapid increase in pressure within chest • Results in neck vein distention, cyanosis, and bleeding into the eyes • Provide supplemental oxygen and monitor vital signs. • Transport immediately. Blunt Myocardial Injury • Bruising of heart muscle • Pulse is often irregular. • There is no prehospital treatment for this condition. • Check patient’s pulse and note irregularities. • Provide supplemental oxygen and transport immediately. Pericardial Tamponade (1 of 2) • Blood or other fluids collect in the pericardium. Pericardial Tamponade (2 of 2) • Signs and symptoms: – Very soft and faint heart tones – Weak pulse – Low blood pressure – Decrease in difference between systolic and diastolic blood pressure – Jugular vein distention (JVD) • Provide oxygen and transport quickly. Laceration of the Great Vessels • The superior vena cava, inferior vena cava, pulmonary arteries and veins, and aorta are contained in the chest. • Injury to these vessels can cause fatal hemorrhage. • Treatment includes: – CPR – Ventilatory support – Supplemental oxygen – Transport immediately. Review 1. A 40-year-old man, who was the unrestrained driver of a car that hit a tree at a high rate of speed, struck the steering wheel with his chest. He has a large bruise over the sternum and an irregular pulse rate of 120 beats/min. You should be MOST concerned that he: A. has injured his myocardium. B. has a collapsed lung and severe hypoxia. C. has extensive bleeding into the pericardial sac. D. is at extremely high risk for ventricular fibrillation. Review Answer: A Rationale: A myocardial contusion, or bruising of the heart muscle, is usually the result of blunt trauma— specifically to the center of the chest. In some cases, the injury may be so severe that it renders the heart unable to maintain adequate cardiac output; as a result, blood pressure falls. The pulse rate is often irregular; however, lethal cardiac dysrhythmias such as ventricular tachycardia and ventricular fibrillation are uncommon. Review 1. A 40-year-old man, who was the unrestrained driver of a car that hit a tree at a high rate of speed, struck the steering wheel with his chest. He has a large bruise over the sternum and an irregular pulse rate of 120 beats/min. You should be MOST concerned that he: A. has injured his myocardium. Rationale: Correct answer B. has a collapsed lung and severe hypoxia. Rationale: This will produce an absence or decrease of breath sounds and unilateral chest wall expansion. C. has extensive bleeding into the pericardial sac. Rationale: This will produce muffled heart sounds and decreased cardiac output. D. is at extremely high risk for ventricular fibrillation. Rationale: Lethal dysrhythmias are uncommon. Review 2. Paradoxical chest movement is typically seen in patients with: A. a flail chest. B. a pneumothorax. C. isolated rib fractures. D. a ruptured diaphragm. Review Answer: A Rationale: Paradoxical chest movement occurs when an area of the chest wall bulges out during exhalation and collapses during inhalation. This type of abnormal chest movement is seen in patients with a flail chest—a condition in which several adjacent ribs are fractured in more than one place, resulting in a free-floating segment of fractured ribs. Review 2. Paradoxical chest movement is typically seen in patients with: A. a flail chest. Rationale: Correct answer B. a pneumothorax. Rationale: This will produce unilateral chest wall movement. C. isolated rib fractures. Rationale: This will produce pain, but not irregular chest wall movement. D. a ruptured diaphragm. Rationale: This typically occurs on the left side. You may hear bowel sounds over the lower chest area. Review 3. Signs of a pericardial tamponade include all of the following, EXCEPT: A. muffled heart tones. B. a weak, rapid pulse. C. collapsed jugular veins. D. narrowing pulse pressure. Review Answer: C Rationale: Pericardial tamponade, which is almost always caused by penetrating chest trauma, occurs when blood accumulates in the pericardial sac. This impairs the heart’s ability to contract and relax; as a result, the systolic BP decreases and the diastolic BP increases (narrowing pulse pressure). Because the heart cannot adequately eject blood, it backs up beyond the right atrium, resulting in jugular venous distention. In some cases, heart tones may be muffled or distant. Other signs include a weak, rapid pulse and hypotension. Review 3. Signs of a pericardial tamponade include all of the following, EXCEPT: A. muffled heart tones. Rationale: This is an assessment finding with pericardial tamponade. B. a weak, rapid pulse. Rationale: This is an assessment finding with pericardial tamponade. C. collapsed jugular veins. Rationale: Correct answer D. narrowing pulse pressure. Rationale: This is an assessment finding with pericardial tamponade. Review 4. After experiencing penetrating trauma to the chest, your patient’s blood pressure is 110/80 mm Hg. Which of the following repeat blood pressures is MOST indicative of a pericardial tamponade? A. 116/74 mm Hg B. 100/90 mm Hg C. 128/60 mm Hg D. 140/80 mm Hg Review Answer: B Rationale: Among the other signs of a pericardial tamponade, a narrowing of the pulse pressure (the difference between the systolic and diastolic pressure) may be observed. Of the choices in this question, the blood pressure of 100/90 mm Hg has a pulse pressure of only 10 mm Hg, which is less than any of the other values listed. Review 4. After experiencing penetrating trauma to the chest, your patient’s blood pressure is 110/80 mm Hg. Which of the following repeat blood pressures is MOST indicative of a pericardial tamponade? A. 116/74 mm Hg Rationale: The pulse pressures are not narrowed. B. 100/90 mm Hg Rationale: Correct answer C. 128/60 mm Hg Rationale: The pulse pressures are not narrowed. D. 140/80 mm Hg Rationale: The pulse pressures are not narrowed. Review 5. When caring for a patient with signs of a pneumothorax, your MOST immediate concern should be: A. hypovolemia. B. intrathoracic bleeding. C. ventilatory inadequacy. D. associated myocardial injury. Review Answer: C Rationale: A pneumothorax occurs when air enters the pleural space and progressively collapses the lung. This impairs the ability of the lung to move air in and out (ventilate). As the lung collapses further, ventilatory efficiency decreases, resulting in hypoxemia; this should be your most immediate concern. Some patients with a pneumothorax may also experience intrathoracic bleeding and associated myocardial injury, depending on the mechanism of injury and the force of the trauma. Review 5. When caring for a patient with signs of a pneumothorax, your MOST immediate concern should be: A. hypovolemia. Rationale: This may be indicated by the signs and symptoms of shock. B. intrathoracic bleeding. Rationale: The patient may experience this, but inadequate ventilation is your immediate concern. C. ventilatory inadequacy. Rationale: Correct answer D. associated myocardial injury. Rationale: The patient may experience this, but inadequate ventilation is your immediate concern Review 6. What purpose does a one-way “flutter valve” serve when used on a patient with an open pneumothorax? A. It prevents air escape from within the chest cavity B. It allows a release for air trapped in the pleural space C. It only prevents air from entering an open chest wound D. It allows air to freely move in and out of the chest cavity Review Answer: B Rationale: A one-way flutter valve is used to treat patients with an open pneumothorax (sucking chest wound), and serves two purposes: it allows air trapped in the pleural space to escape during exhalation and prevents air from entering the pleural space during inhalation. These combined effects alleviate pressure on the affected lung, which allows it to reexpand. Review 6. What purpose does a one-way “flutter valve” serve when used on a patient with an open pneumothorax? A. It prevents air escape from within the chest cavity Rationale: It allows air to exit the chest. B. It allows a release for air trapped in the pleural space Rationale: Correct answer C. It only prevents air from entering an open chest wound Rationale: It prevents air from entering and allows air to exit the chest. D. It allows air to freely move in and out of the chest cavity Rationale: It allows air to move out freely and prevents air from entering. Review 7. When the chest impacts the steering wheel during a motor-vehicle crash with rapid deceleration, the resulting injury that kills almost one-third of patients, usually within seconds, is: A. a hemothorax. B. aortic shearing. C. a pneumothorax. D. a ruptured myocardium. Review Answer: B Rationale: When the chest impacts the steering wheel following rapid forward deceleration, aortic injuries (shearing or rupture) are the cause of death in nearly two-thirds of patients. The aorta is the largest artery in the body; when it is sheared from its supporting structures or ruptures outright, exsanguination (bleeding to death) occurs—usually within a matter of seconds. Myocardial rupture is not a common injury, although it would be equally as fatal. Hemothorax and pneumothorax—both of which are life-threatening injuries—are usually not fatal within seconds. Review 7. When the chest impacts the steering wheel during a motorvehicle crash with rapid deceleration, the resulting injury that kills almost one-third of patients, usually within seconds, is: A. a hemothorax. Rationale: This is a serious injury, but is not fatal in seconds. B. aortic shearing. Rationale: Correct answer C. a pneumothorax. Rationale: This is a serious injury, but is not fatal in seconds. D. a ruptured myocardium. Rationale: This is a serious injury, but not common. Review 8. Signs and symptoms of a chest injury include all of the following, EXCEPT: A. hemoptysis. B. hematemesis. C. asymmetrical chest movement. D. increased pain with breathing. Review Answer: B Rationale: Signs and symptoms of a chest injury include, among others, bruising to the chest, chest wall instability, increased pain with breathing, asymmetrical (unequal) chest movement if a pneumothorax is present, and hemoptysis (coughing up blood) if intrapulmonary bleeding is occurring. Hematemesis (vomiting blood) indicates bleeding in the gastrointestinal tract—usually the esophagus or stomach—not the chest cavity. Review 8. Signs and symptoms of a chest injury include all of the following, EXCEPT: A. hemoptysis. Rationale: Hemoptysis is coughing up blood or blood tinged sputum. B. hematemesis. Rationale: Correct answer C. asymmetrical chest movement. Rationale: This may indicate a flailed chest or pneumothorax. D. increased pain with breathing. Rationale: A chest injury will cause the presence of pain during inspiratory or expiratory chest wall movement. Review 9. During your rapid trauma assessment of a patient who was stabbed, you see an open wound to the left anterior chest. Your MOST immediate action should be to: A. position the patient on the affected side. B. administer oxygen and transport at once. C. assess the patient for a tension pneumothorax. D. cover the wound with a non-porous dressing. Review Answer: D Rationale: Since you are performing a rapid trauma assessment, you have already performed an initial assessment, which involved administering high-flow oxygen or assisted ventilation. If you encounter an open chest wound, your most immediate action should be to cover it with a non-porous (occlusive) dressing. This will prevent air from moving in and out of the wound. After the dressing is applied, however, you must monitor the patient for signs of a developing tension pneumothorax; if needed, lift one corner of the occlusive dressing to allow air escape from the chest cavity. Review 9. During your rapid trauma assessment of a patient who was stabbed, you see an open wound to the left anterior chest. Your MOST immediate action should be to: A. position the patient on the affected side. Rationale: This is not the most immediate action. B. administer oxygen and transport at once. Rationale: Oxygen administration and ventilatory assistance is completed in the initial assessment. C. assess the patient for a tension pneumothorax. Rationale: You must monitor for signs of a developing pneumothorax. D. cover the wound with a non-porous dressing. Rationale: Correct answer Review 10. During your assessment of a patient with a closed chest injury, you should NOT intentionally assess for: A. bruising. B. deformities. C. crepitation. D. breath sounds. Review Answer: C Rationale: Crepitus, the sound made (or sensation felt) when broken bone ends rub together, is not intentionally assessed for in patients with any injury; it is a coincidental finding that should be documented. Intentionally assessing for crepitus— which involves moving or manipulating the injured area—may worsen the injury and should be avoided. Review 10. During your assessment of a patient with a closed chest injury, you should NOT intentionally assess for: A. bruising. Rationale: This may be seen on inspection. B. deformities. Rationale: This may be visualized during the inspection of a patient’s chest. C. crepitation. Rationale: Correct answer D. breath sounds. Rationale: EMS providers must assess for the presence of or lack of adequate lung sounds.