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Life- threatening hemothorax due to the inferior pulmonary ligament injury without obvious organ injuries: a case report
© Kim et al.; licensee BioMed Central. 2015
Received: 27 July 2014
Accepted: 12 March 2015
Published: 21 March 2015
Traumatic hemothorax is usually associated with obvious organ injuries, such as rib fractures, pulmonary injuries, and other mediastinal injuries. We present a rare case in which a 42-year- old Korean man who fell off of a roof, approximately 3 meters in height, resulting in a life-threatening hemothorax without obvious injuries to the thoracic organs. Chest CT showed a large amount of hemothorax in the right side of the thoracic cavity, and an active bleeding, presumably from the posterior intercostal or the phrenic artery, with a focal aneurysmal change. The emergency thoracotomy was performed to bring the active bleeding under control. The operative findings showed there were only the inferior pulmonary ligament tears, and the active bleeding from it. The postoperative course was uneventful and the patient was discharged without any complications. We should consider the inferior pulmonary ligamental injury as one of causes for traumatic hemothorax.
KeywordsTrauma Hemothorax Inferior pulmonary ligament
Traumatic hemothorax is usually associated with obvious organs injuries, such as such as rib fractures, pulmonary injuries, and other mediastinal injuries [1,2]. We present a rare case, in which an emergent thoracotomy was performed for the life-threatening hemothorax due to the inferior pulmonary ligament injury without obvious organs injuries.
Most common cause of a hemothorax is trauma [1-3]. Traumatic hemothorax is usually consequence of other organ damage, such as chest wall, the lung paremchyme and the tracheobronchial tree, the esophagus, the diaphragm, and the heart or great vessels [1,2]. Thoracic distortion and shearing after blunt trauma to the chest can result in the injuries in any one or all structures of the thoracic cavity and the chest wall . Also, laceration of internal vessels by blunt trauma can occasionally result in hemothorax [1-3].
This present case, in which a massive, active, life-threatening hemothorax developed, in spite of the absence of injuries of other components of the chest wall, and thoracic structures, is rare. Also, it required an emergency thoracotomy in order to control the unstable condition due to the active bleeding. At first, we considered the use of VATS. But we chose the open thoracotomy rather than VATS because the patient was in rapid deterioration due to massive and active bleeding. To the best of our knowledge, the present report is the first ever report about a hemothorax due to inferior pulmonary ligament tears without obvious organ injuries after blunt trauma. At first, the diaphragmatic injury, or the phrenic artery laceration, were suspected for the hemothorax, but the operative findings showed no the other component injuries in the chest wall and the thoracic cavity. Only the inferior pulmonary ligament tears, and the active bleeding from the tears, were observed. This injury was thought to be the result from a remarkable pressure gradient application to the inferior pulmonary ligament.
The inferior pulmonary ligament comprises of a double membrane of pleura that drapes caudally from the lung root and loosely tethers the medial side of the lower lobe of the lung to the mediastinum . The inferior pulmonary ligament can be torn by a remarkable pressure gradient application, such as traction and compression, because it anchors the lower lobe to the mediastinum and to the diaphragm. The space between the two membranes of the inferior pulmonary ligament contains loose connective tissue, small arterial branches from bronchus and esophagus, some venules draining into the superior diaphragmatic veins, and some lymphatic vessels and nodes emptying into the lower lobes of the lung and lower third of the thoracic esophagus . Therefore, a massive, active, and life- threatening hemothorax can be developed from inferior pulmonary ligament injuries. In addition, the possibility of the malformation of the vasculature in the inferior pulmonary ligament should be considered.
Contrast-enhanced CT is generally considered to be mandatory in order to identify and localize the bleeding foci by detection of extravasations of a contrast agent, or aneurysmal changes of the bleeding foci [2,3,5]. In the present case, chest CT showed the active bleeding from the laceration of artery in the inferior pulmonary ligament.
We report a rare case of a life- threatening hemothorax due to the inferior pulmonary ligament tearing without obvious organ injuries after blunt trauma. The inferior pulmonary ligament injury without obvious organ injuries should be considered to be one of causes for traumatic hemothorax.
Written informed consent was obtained from the patient for publication of this Case report and any accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal. This case study was approved by Institutional Review Board for Uijeongbu St. Mary’s Hospital (UC14ZISE0079).
The authors have no funding, financial relationships or conflicts of interest to disclose.
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