eMedicine Specialties > Thoracic Surgery > Trauma
Diaphragmatic Hernias, Acquired: Workup
Updated: Jan 14, 2008
Workup
Laboratory Studies
- No laboratory studies are needed to confirm a traumatic rupture of the diaphragm.
Imaging Studies
- Chest radiography is standard in the advanced trauma life support (ATLS) protocol for a trauma workup. Approximately 23-73% of traumatic diaphragmatic ruptures will be detected by initial chest radiograph, with an additional 25% found with subsequent films.2 Chest radiograph is most sensitive for detecting left-sided hernias. Chest radiographic findings that indicate traumatic rupture include the following:
- Abdominal contents in the thorax, with or without signs of focal constriction ("collar sign")2
- Nasogastric tube seen in the thorax
- Elevated hemidiaphragm (>4 cm higher on left vs right)
- Distortion of diaphragmatic margin
- Conventional CT scan has been reported to have a sensitivity of 14-82%, with a specificity of 87%. Helical CT increased sensitivity 71-100%, with higher sensitivity left vs right.2 CT findings indicating rupture include the following:
- Direct visualization of injury
- Segmental diaphragm nonvisualization
- Intrathoracic herniation of viscera
- "Collar sign"
- Peridiaphragmatic active contrast extravasation
- Ultrasonography (focused assessment with sonography for trauma [FAST] scan) has been reported to detect diaphragmatic hernias.6 During visualization of each upper quadrant, the movement of the diaphragm was noted to be decreased in patients with diaphragmatic hernias. This technique is limited in patients who are on mechanical ventilation because of the positive pressure of the thoracic cavity.1
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References
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Sliker CW. Imaging of diaphragm injuries. Radiol Clin North Am. Mar 2006;44(2):199-211, vii. [Medline].
Hamoudi D, Bouderka MA, Benissa N, Harti A. Diaphragmatic rupture during labor. Int J Obstet Anesth. Oct 2004;13(4):284-6. [Medline].
Hayden JD, Davies JB, Martin IG. Diaphragmatic rupture resulting from gastrointestinal barotrauma in a scuba diver. Br J Sports Med. Mar 1998;32(1):75-6. [Medline].
West, John B. Normal Physiology; Acute Respiratory Failure. In: Anthony, Robert. Pulmonary Physiology and Pathophysiology. Baltimore, MD: Lippincott Williams & Wilkins; 2001:2-3; 129.
Blaivas M, Brannam L, Hawkins M, Lyon M, Sriram K. Bedside emergency ultrasonographic diagnosis of diaphragmatic rupture in blunt abdominal trauma. Am J Emerg Med. Nov 2004;22(7):601-4. [Medline].
Ahmed N, Whelan J, Brownlee J, Chari V, Chung R. The contribution of laparoscopy in evaluation of penetrating abdominal wounds. J Am Coll Surg. Aug 2005;201(2):213-6. [Medline].
Cameron JL. Diaphragmatic injury. In: Current Surgical Therapy. 7th ed. Mosby-Year Book: St Louis, MO; 2001:1095-100.
Fell SC. Surgical anatomy of the diaphragm and the phrenic nerve. Chest Surg Clin N Am. May 1998;8(2):281-94. [Medline].
Irish MS, Holm BA, Glick PL. Congenital diaphragmatic hernia. A historical review. Clin Perinatol. Dec 1996;23(4):625-53. [Medline].
Mandell GA, Finkelstein MS, Hallowell M. Delayed presentation of a symptomatic Morgagni hernia. South Med J. Oct 1989;82(10):1299-302. [Medline].
Mansour KA. Trauma to the diaphragm. Chest Surg Clin N Am. May 1997;7(2):373-83. [Medline].
Naunheim KS. Adult presentation of unusual diaphragmatic hernias. Chest Surg Clin N Am. May 1998;8(2):359-69. [Medline].
Shah R, Sabanathan S, Mearns AJ, Choudhury AK. Traumatic rupture of diaphragm. Ann Thorac Surg. Nov 1995;60(5):1444-9. [Medline].
Sharma OP. Traumatic diaphragmatic rupture: not an uncommon entity--personal experience with collective review of the 1980's. J Trauma. May 1989;29(5):678-82. [Medline].
van Vugt AB, Schoots FJ. Acute diaphragmatic rupture due to blunt trauma: a retrospective analysis. J Trauma. May 1989;29(5):683-6. [Medline].
Further Reading
Keywords
hiatal hernia, diaphragm, congenital diaphragmatic hernia, CDH, respiratory dysfunction, respiratory compromise, blunt trauma, penetrating trauma, diaphragmatic rupture, motor vehicle accident, gunshot wound, stab wound, diaphragmatic hernia, acquired hernia, acquired diaphragmatic hernia
Workup: Diaphragmatic Hernias, Acquired