Diaphragmatic rupture

Case contributed by Dr Andrew Dixon

Presentation

Car versus pole.

Patient Data

Age: 75
Gender: Male

Trauma Radiology Course: 6 hours of video teaching for just $60! Includes English captions and a course certificate >>> REGISTER

X-ray

Trauma Series

Bilateral pneumocaths have been placed by paramedics. Multiple right sided rib fractures. Abnormal density in the left lower zone with the hemidiaphragm contour not able to be traced and the gas bubble appearing elevated above its normal position. Mild shift of the mediastinum to the right. These appearances are highly suspicious for diaphragmatic rupture.   

CT

Chest CT

CT confirms left diaphragm rupture with portions of stomach, large bowel and small bowel herniating into the chest. Positive mass effect from the herniated contents causes mediastinal shift to the right and near complete collapse of the left lower lobe. The distal transverse colon is narrow at entering the hernia, then becomes significantly dilated when it sits anteriorly and then becomes collapsed suggesting closed obstruction of this segment. A left intercostal catheter has been placed into the herniated peritoneal contents rather than the pleural space and abuts several bowel loops. It is difficult to know if any iatrogenic bowel injury has occurred.

Other findings include; trace haemothoraces, small residual right anterobasal pneumothorax, displaced right rib fractures with flail segment, left anterior rib fractures, right scapula fracture, multiple thoracic fractures (some old and some new), mesenteric haematoma suggesting possible bowel injury and right iliac wing fracture.  

Case Discussion

This case emphasises the importance of assessing the hemidiaphragms on trauma chest x-rays. If the diaphragm outline cannot be clearly traced then one must look carefully for signs of diaphragm rupture such as herniated viscus in the chest and positive mass effect, both of which could be seen in this man. An intercostal catheter was presumably inserted in this case because the trauma team incorrectly thought the dense left lower zone opacity was haemothorax. It is important to remember that while haemothorax does produce positive mass effect (mediastinal shift), it should not be localised to the lower zone and should instead produce a generalised increased density throughout the hemithorax of a supine patient. 

PlayAdd to Share

Case information

rID: 31641
Case created: 19th Oct 2014
Last edited: 30th May 2017
System: Chest
Inclusion in quiz mode: Included

Updating… Please wait.
Loadinganimation

Alert accept

Error Unable to process the form. Check for errors and try again.

Alert accept Thank you for updating your details.