A resuscitative thoracotomy (sometimes referred to as an emergency department thoracotomy) is a thoracotomy typically done in order to resuscitate a person who has been severely injured after sustaining a severe trauma involving the thoracic cavity. For most persons with thoracic trauma the procedure is not necessary; only 15% of those with thoracic injury require the procedure.
A resuscitative thoracotomy is indicated when severe injuries within the thoracic cavity prevent the physiologic functions needed to sustain life (such as hemorrhage). The injury may also affect a specific organ such as the heart which can develop an air embolism or a cardiac tamponade (which prevents the heart from beating properly). Other indications for the use of this procedure would be the appearance of blood from a thoracostomy tube placed that returns more than 1500 mL of blood, or ≥200 mL of blood per hour.
For resuscitative thoracotomy to be indicated, signs of life must also be present including cardiac electrical activity and a systolic blood pressure >70 mm Hg. In blunt trauma, if signs of life, such as eye dilatation, are found en route to the hospital by first responders, but not found when the patient arrives, then further resuscitative interventions are contraindicated; however; when first responders find signs of life and cardiopulmonary resuscitation time is under 15 minutes, the procedure is indicated.
A left anterolateral thoracotomy is the common method of opening the chest as it provides rapid access, can be easily extended into the right hemithorax, and provides access to most of the important anatomical structures during resuscitation including the aorta. First an incision is made along the fourth or fifth intercostal space (between the ribs), intercostal muscles and the parietal pleura are divided, and then the ribs are retracted to provide visualization. When the incision covers both the right and left hemothroaxes it is referred to as a "clamshell" thoracotomy. The clamshell thoracotomy is used when there is a right side pulmonary or vascular injury.
The procedure was first utilized during the late 1800s by Schiff in conjunction with open cardiac massage. Shortly after it was also used by Block to treat heart lacerations, and the first suture repair performed in 1900. Before external defibrillation and cardiopulmonary resuscitation came in the 1960s, emergency thoracotomy was the preferred way to treat cardiac arrest.
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Emergency Department Thoracotomy - Trauma.org