Emergency Bedside Thoracotomy
Since its introduction in 1900, the emergency department thoracotomy (EDT, sometimes referred to as emergency resuscitative thoracotomy) has been a subject of intense debate. It is a drastic, last-ditch effort to save the life of a patient in extremis due to injury.  Although some studies boast a 60% survival rate, others have argued that EDT is a futile and expensive procedure that only places health care providers at significant personal risk. Further, indications for EDT have widely varied. For these reasons, the EDT remains a controversial but potentially lifesaving procedure in a select group of patients. [2, 3]
The causes of acute circulatory arrest after chest injury include hemorrhagic shock due to injury to the heart or intrathoracic vasculature, cardiac tamponade, and tension pneumothorax.
The primary goals of EDT include the following  :
Prevention of air embolism
Exposure of the descending thoracic aorta for cross-clamping
Repair cardiac or pulmonary injury
Emergent thoracotomy typically takes place in the emergency department or operating room. It is crucial for the emergency provider to consult a surgeon upon the patient’s arrival to facilitate with the procedure if possible or to manage the patient subsequent to the thoracotomy. Emergent thoracotomies have been successfully performed in the prehospital setting by physicians and emergency medical service teams. [9, 10, 11] Rapid transport to the emergency department is associated with higher survival rates in thoracic injury. 
The indications for EDT have been much debated.
To simplify the issue, the American College of Surgeons Committee on Trauma has instituted general guidelines on this subject. 
The decision to perform an EDT is determined by the presence of signs of life and the mechanism and location of injury.
Increased thoracotomy survival rates are associated with signs of life in the ED, including the following:
Presence of carotid pulse
Measurable or palpable blood pressure
Cardiac electrical activity
Thoracic injuries (as opposed to abdominal injuries) can be identified and treated during EDT.
Survival for blunt injury is significantly lower than for penetrating injury due to conditions such as cardiac contusion, cardiac rupture, and aortic rupture. [14, 15, 16] Many consider an attempt to resuscitate a blunt trauma patient in cardiac arrest futile.  However, some have a different view, reporting better outcomes from EDT in European countries where blunt trauma predominates. 
Stab wounds (as opposed to gunshot wounds [GSWs]) are associated with a higher success rate. GSW injuries are usually unable to spontaneously seal because of the large nature of the missile injury pattern. [1, 19]
The following are also associated with increased survival:
Higher blood pressure
Higher respiratory rates
Higher Glasgow coma scale scores
Penetrating thoracic injury with the following conditions:
Previously witnessed cardiac activity (prehospital or in-hospital)
Unresponsive hypotension (systolic blood pressure [SBP] 20</ref>
Blunt thoracic injury with the following conditions:
Previously witnessed cardiac activity (prehospital or in-hospital)
Rapid exsanguination from the chest tube (>1,500 mL immediately returned)
Unresponsive hypotension (SBP <70 mm Hg) despite vigorous resuscitation
American College of Surgeons Committee on Trauma indications for EDT are as follows  :
Precordial wound in a patient with prehospital cardiac arrest
Trauma patient with cardiac arest after arrival to ED
Profound hypotension (<70 mm Hg) in a patient with a truncal wound who is either unconscious or an operating room is unavailable
See the list below:
Penetrating thoracic injury with traumatic arrest without previously witnessed cardiac activity
Penetrating nonthoracic injury (eg, abdominal, peripheral) with traumatic arrest with previously witnessed cardiac activity (prehospital or in-hospital)
Blunt thoracic injuries with traumatic arrest with previously witnessed cardiac activity (pre-hospital or in-hospital).
The Eastern Association for the Surgery of Trauma sought to provide evidence-based recommendations for EDT based on common clinical scenarios based on a systematic data search. Their conclusions are summarized as follows  :
EDT should not be performed in patients under the following conditions:
Penetrating abdominal trauma without cardiac activity (prehospital)
Severe head injury
Severe multisystem injury
Improperly trained team
A 2011 prospective multicenter study suggests that EDT does not yield survival if the following are noted  :
Blunt trauma with more than 10 minutes of prehospital cardiopulmonary resuscitation (CPR) without response
Penetrating trauma with more than 15 minutes of prehospital CPR without response
Asystole without cardiac tamponade
Most patients undergoing EDT are comatose or medically sedated and/or paralyzed from airway management.
The first consideration should be to intubate the patient for adequate control and comfort. If orotracheal intubation is not possible (eg, unsuccessful intubation or anticipated difficult intubation), adequate analgesic and amnestic agents are indicated. Ideally, agents that have minimal effects on the cardiovascular system should be used. For more information, see Procedural Sedation.
See the list below:
Povidone iodine (Betadine)
See the list below:
Scalpel, No. 10 or No. 20 blade
Mayo scissors (alternatively, Metzenbaum scissors)
Rib spreaders (eg, Finochietto)
Trauma shears or saw (eg, Gigli)
See the list below:
Satinsky vascular clamps (large and small)
Long and short needle holders (eg, Hegar)
Nonabsorbable sutures (silk), 2-0 or larger, on large round-body needle
Cardiovascular Ethibond sutures, 3-0
Teflon pledgets plus polypropylene or large braided sutures
Aortic clamp instrument
High-volume suction device
Foley catheter, 20F with 30-mL balloon
Internal defibrillator (charge to 10 J to start)
Chest tube, 30F
A simplified approach has been suggested in performing a “clamshell” thoracotomy (see below in Technique) to maximize exposure and minimize time of performance, requiring only a scalpel, nontoothed forceps, dressing scissors, and Plaster-of-Paris shears. 
The patient should be supine. Place several towels beneath the left scapula. Raise the patient’s left arm above the head. The patient’s arm may be secured in the elevated position with tape or restraints, if necessary.
Prepare the patient’s left and right chest with iodine.
Drape the area with sterile sheets or towels.
Airway control is typically indicated for all patients and is best performed through standard orotracheal techniques. If exposure to the thoracic organs is impeded because of frequent lung inflation, selective right mainstem intubation may be performed by passing the endotrachial tube to 30 cm.
A nasogastric tube may be passed to help differentiate the esophagus from the aorta. The procedure should not be delayed for passage of the nasogastric tube.
An assistant should retract the breast upward prior to incision if necessary.
The incision is typically made over the fifth rib into the fourth intercostal space, beginning at the sternum and extending to the posterior axillary line.
The incision should be deep enough to partially transect the latissimus dorsi muscle.
Time should not be taken to count the rib spaces.
In patients with a suspected left subclavian injury, the incision may be made in the third intercostal space.
A left-sided approach is made in all traumatic arrests and in patients with left-sided chest injuries, as shown below. (A right-sided approach may be used in nonarrested patients with right-sided injuries.)
Separate the skin, subcutaneous fat, and superficial portions of the pectoralis and serratus muscles with a No. 20 scalpel blade.
Stop ventilation momentarily just before entering the pleural cavity to allow the lung to collapse and minimize iatrogenic injury.
Use a scalpel to make a small incision through the intercostal muscles.
Place one blade of blunt-ended scissors into the hole; then, completely transect the intercostal muscles. The operator may insert the fourth and fifth fingers of his or her free hand into the intercostal space and gently push away the lung to prevent injury to it by the scissors.
After transection of the intercostals muscles, place a rib spreader between the ribs to expose the intrathoracic contents. The rib spreader should be placed with the handle downward to permit for extension of the incision into the right chest if necessary.
Upon visualization of the thoracic cavity, use suction to evacuate clots and blood.
If injury to the right side of the heart is suspected, another incision can be made on the right, creating what is known as a clamshell (bilateral anterolateral thoracotomy). This requires laceration of the internal mammary arteries, which can later be ligated if resuscitation is successful. 
Alternatively, the sternum can be divided with trauma shears or a Gigli saw to extend the thoracotomy across the midline (called a trap door). Transection of the internal mammary arteries by this technique may result in significant bleeding once blood flow is restored.
This should be the second step if a tamponade is suspected. Otherwise, the aorta may be cross-clamped first (see below). If the visualized thoracic contents do not reveal any obvious injury but cardiac injury is suspected, the pericardium should be opened. Visual inspection of the pericardium is not sensitive to rule out cardiac tamponade, and the pericardium should always be opened to assess for retro cardiac blood.
Use tissue forceps to grasp the parietal pericardium and incise the pericardium with scissors.
Enter the pericardium anterior to the phrenic nerve and near the diaphragm to avoid injury to the great vessels.
The phrenic nerve, often difficult to visualize in the ED, is a tendonlike structure. Upon incision of the pericardium, take care to keep the point of the scissors parallel to the heart to prevent damage to the myocardium when extending the incision.
Alternatively, after the initial incision into the pericardium, the operator can use his or her fingers to tear the pericardium. Such blunt dissection helps to avoid laceration of the phrenic nerve.
The heart should be delivered from the pericardial sack for inspection, as shown below.
If cardiac lacerations are seen, digital occlusion, interrupted sutures, or clamps (Satinsky) can be used as indicated. (see Cardiac Repair below)
Cross-clamping the descending aorta redistributes the available blood flow to the coronary and cerebral arteries.
Selective clamping of the descending aorta near the level of the diaphragm can also be used to control hemorrhage in abdominal vascular injuries.
Clamping distally is ideal because it maximizes spinal cord perfusion and because the aorta is relatively mobile at this location.
Retract the left lung superiorly to expose the aorta.
Bluntly dissect the mediastinal pleura with a Kelly clamp to reveal the mediastinal structures. The aorta lies anterior to the vertebrae, whereas the esophagus lies anterior and medial to the aorta, as shown below. While the aorta is said to feel rubbery, firm, and pulsatile, a hypotensive aorta is often difficult to distinguish from the esophagus.
A nasogastric tube may be placed; palpation of this rigid tube is a way to differentiate the esophagus from the descending aorta.
Occlusion of the aorta above the level of injury can be performed either through digital occlusion or with the use of an aortic tamponade instrument. Take care to not injure aortic or esophageal tissues.
Organs that are distal to the aorta, including the bowel, kidneys, liver, and spinal cord, may become ischemic after occlusion.
Clamp time should be limited to 30 minutes or less. However, one study found that patients who underwent cross-clamping of the aorta for up to 60 minutes in emergency thoracotomy had no significant decrease in organ function.
Avoid cross-clamping the aorta in normotensive patients because the elevated afterload compromises cardiac circulation. 
There is evidence that a less traumatic intra-aortic balloon occlusion catheter can be used instead of traditional aortic cross-clamping  (resuscitative endovascular balloon occlusion of the aorta technique). 
Large wounds to the heart may be repaired with pledgetted sutures, incomplete mattress sutures, horizontal mattress sutures, or continuous running sutures. Nonabsorbable sutures, such as polypropylene or nylon, and even staple guns may be used.  The coronary arteries must not be compromised during repair; this is usually accomplished with mattress sutures.
Cardiac exsanguination may be temporized by placing a Foley catheter inside the wound, inflating the catheter balloon, and then withdrawing the catheter to occlude the defect. Clamp the catheter to prevent exsanguination.
Digital occlusion may also be used to stop bleeding temporarily.
If multiple cardiac or great vessel gunshot wounds are seen on EDT, resuscitative efforts may be terminated because of limited surival probablility. 
No scientific consensus has been reached on the use of this procedure. 
Perform internal cardiac massage with a 2-handed technique to avoid perforation of the ventricle with your thumb.
Compared with standard CPR, which delivers up to 20% of the cardiac output, internal CPR produces up to 55% of the body’s baseline perfusion.
Continue this resuscitation effort for 20 minutes before termination. 
Internal defibrillation begins at 20 joules and increases to 40-50 joules. Avoid touching the coronary arteries with the paddles.
Fluid resuscitation should begin after hemorrhage control. Warmed fluids, blood, and clotting factors are likely necessary.
A large bore intravenous catheter could be inserted into the right atrium for fluid resuscitation. 
Inotropic support may be required after adequate fluid resuscitation in cases of cardiogenic shock.
Bleeding vasculature may be temporized with atraumatic clamps or sutures and emergently repaired by a specialist.
The pulmonary hilum may be cross-camped in cases of major pulmonary hemorrhage.
Patients who require resuscitative thoracotomy in the emergency department are candidates for thoracic damage control surgery. 
Survival after EDT in blunt trauma patients is much lower than with penetrating injury.  Some recommend not performing EDT in patients with blunt trauma, owing to the particularly low survival rates. [3, 16, 19, 44, 45, 46] Of penetrating injuries, survival after emergency thoracotomy is higher in stab wounds than gunshot wounds.  Patients who sustain a single penetrating wound to the chest have the best survivability after a resuscitative thoracotomy.  Outcomes are similar in adult and pediatric patients. 
Control of the airway via standard orotracheal intubation technique is strongly advised prior to performing EDT. Selective intubation of the right mainstem bronchus is the preferred method. This allows for both ventilation and oxygenation of the patient via the right lung as well as decreased risk of injury to the left lung via decreased left lung expansion during a left-sided anterolateral thoracotomy. To intubate the right mainstem bronchus, directly visualize the vocal cords to pass the endotracheal (ET) tube into the trachea, and then blindly pass the ET tube to approximately 30 cm.
Either prior to EDT or while the procedure is being performed, an assistant should pass a nasogastric tube to help distinguish the esophagus from the aorta upon exploration of the thoracic contents.
Immediately obtain a surgical consult. If the patient survives the EDT, they need to be taken expediently to the operating room.
Use the left anterolateral thoracotomy approach when the site of the injury is unknown and the patient’s status requires immediate intervention for possible intrathoracic injuries.
Incision over the fifth rib with dissection into the fourth intercostal space provides the best access to the heart and great vessels. This incision is just beneath the nipple in men or along the inframammary fold in women.
The rib spreaders should be placed with the handle downward to permit for extension of the incision into the right chest if necessary.
Avoid making the incision too low. The location of the heart is commonly thought of as lower than it actually is.
The incision should be made just above the rib to avoid injury to the intercostals neurovascular bundle.
Gaining access to the thoracic cavity should take no longer than 1-2 minutes.
Use nontoothed forceps to lift the pericardium, and use small dressing scissors to open it in order to avoid ventricular laceration. 
When the patients clinical status allows, urgent rather than emergent thoracotomy can be performed to minimize the dangers incumbent to this procedure in the ED. 
Large amounts of blood products are typically required in the resuscitation of patients undergoing EDT.
Consider potential organ donor rescue after EDT arrest. 
EDT is a potentially lifesaving procedure; however, its complications must be weighed against its benefits.
Specific complications of EDT include the following:
Neurologic complications from hypoperfusion: Anoxic brain death occurs in as many as 50% of survivors, requiring ongoing institutional care. 
Recurrent bleeding from chest wall or internal mammary artery
Damage to the coronary arteries
Other cardiac damage including ventricular lacertations, ventricular septal defects, aortic valvular irregularities, atrial septal defects, and cardiac conduction defects
Damage to the esophagus during aortic cross-clamping
Damage to the phrenic nerve
Ischemia to distal organs and spinal cord due to cross-clamping of aorta
The potential for transmission of blood-borne pathogens from the patient to the clinicians performing the procedure is also a very real risk. Because of the haste required for a timely resuscitation, provider injury from needles, scalpels, scissors, and bone spicules can occur.  The seroprevalence of the human immunodeficiency virus (HIV) in urban EDs in the United States has been reported to range from 1.4-19%. [53, 54, 55]
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Gretchen S Lent, MD Attending Physician, Department of Emergency Medicine, Torrance Memorial Medical Center
Disclosure: Nothing to disclose.
Neel Kumar, MD Staff Physician, Department of Emergency Medicine, The Permanente Medical Group, Sacramento Medical Center
Disclosure: Received stockholder from Pfizer for none.
Mary L Windle, PharmD Adjunct Associate Professor, University of Nebraska Medical Center College of Pharmacy; Editor-in-Chief, Medscape Drug Reference
Disclosure: Nothing to disclose.
Brett C Sheridan, MD, FACS Associate Professor of Surgery, University of North Carolina at Chapel Hill School of Medicine
Disclosure: Nothing to disclose.
Luis M Lovato, MD Associate Clinical Professor, University of California, Los Angeles, David Geffen School of Medicine; Director of Critical Care, Department of Emergency Medicine, Olive View-UCLA Medical Center
Disclosure: Nothing to disclose.
The authors and editors of Medscape Reference gratefully acknowledge the assistance of Lars Grimm with the literature review and referencing for this article.
Emergency Bedside Thoracotomy
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