Diaphragm Injury
A tear in the muscle separating the chest and abdomen
Quick Facts
- Type: Chest and abdominal injury
- Common causes: Car crashes, falls, penetrating wounds
- Main danger: Breathing trouble, organ herniation into the chest
- Seek urgent care: Severe trauma with chest or abdominal pain and breathlessness
Overview
The diaphragm is the large dome-shaped muscle that separates the chest from the abdomen and powers breathing. A diaphragm injury is a tear or rupture of this muscle, almost always caused by significant trauma. When the diaphragm tears, the difference in pressure between the chest and abdomen can pull stomach, intestine, or other abdominal organs up into the chest, where they can press on the lungs and heart.
Diaphragm injuries often occur together with other serious injuries and can be missed at first. They sometimes only become obvious days, months, or even years later when organs herniate through the tear. Repair almost always requires surgery. Tears more often occur on the left side, because the liver helps shield and cushion the right side of the diaphragm. Once the muscle is torn, it does not heal on its own, and the constant pressure difference between the chest and abdomen tends to enlarge the defect over time, which is why surgical repair is the standard treatment.
Symptoms
Symptoms vary widely. Some injuries cause immediate severe distress; others are silent until organs herniate later.
- Difficulty breathing or shortness of breath
- Chest pain or upper abdominal pain
- Pain that may spread to the shoulder
- Rapid heartbeat and low blood pressure
- Nausea and vomiting
- A feeling of bloating or fullness in the chest
- In severe cases, bowel sounds heard in the chest
If abdominal organs become trapped and their blood supply is cut off (strangulation), the person can develop severe pain, vomiting, and signs of shock. This is a surgical emergency.
Causes
Diaphragm injuries result from forceful trauma to the chest or abdomen.
- Blunt trauma: High-speed motor vehicle collisions and falls from height are the most common causes; the sudden rise in abdominal pressure can burst the muscle.
- Penetrating trauma: Stab or gunshot wounds to the lower chest or upper abdomen.
- Crush injuries to the torso.
Rarely, weak spots in the diaphragm present from birth can also allow organs to move into the chest.
Risk Factors
- High-speed driving or not wearing a seatbelt
- Falls from significant height
- Penetrating wounds to the lower chest or upper abdomen
- Major crush injuries to the torso
- Multiple-organ trauma, which frequently accompanies diaphragm injury
Because the injury so often occurs with other major trauma, the diaphragm tear can be overlooked while attention is focused on more obvious injuries. A history of significant chest or abdominal trauma is therefore an important clue when unexplained breathing or digestive symptoms appear later.
Diagnosis
Diaphragm injuries can be difficult to detect, so doctors use a combination of approaches:
- Chest X-ray: May show abdominal organs or a feeding tube in the chest, but can appear normal.
- CT scan: The most useful imaging test for detecting tears and herniated organs.
- MRI: Occasionally used to clarify uncertain cases.
- Surgical exploration: Sometimes the injury is found during an operation for other trauma.
Treatment
Diaphragm tears do not heal on their own and almost always need surgical repair.
- Stabilization: Breathing support, fluids, and treatment of other injuries come first.
- Surgery: The surgeon returns any herniated organs to the abdomen and stitches the tear closed, sometimes using a mesh patch for large defects. This may be done through the abdomen or the chest, by open surgery or minimally invasive techniques.
- Emergency surgery: Required urgently if organs are trapped or their blood supply is threatened.
Recovery depends on the size of the tear and any other injuries. Repaired injuries generally do well, though follow-up is important.
Prevention
- Always wear a seatbelt and use proper child restraints
- Drive at safe speeds and avoid impaired driving
- Reduce fall hazards, especially at heights
- Use appropriate protective equipment at work and in sports
When to See a Doctor
A diaphragm injury usually occurs with major trauma that already requires emergency care. Call emergency services or go to the nearest emergency department right away for any serious chest or abdominal injury, especially with:
- Difficulty breathing or shortness of breath
- Chest or upper abdominal pain
- Pain spreading to the shoulder
- Persistent vomiting
- Dizziness, fainting, or a racing heartbeat
Because some tears appear later, tell your doctor about any past serious chest or abdominal trauma if you develop new breathing or digestive symptoms.
Frequently Asked Questions
Can a diaphragm injury heal on its own?
No. A torn diaphragm does not heal without treatment because the muscle is under constant tension from breathing. Surgical repair is almost always required to close the tear and return any displaced organs to the abdomen.
Why might a diaphragm injury be discovered late?
Some tears cause few symptoms at first and are missed during the initial trauma evaluation. Months or years later, abdominal organs may gradually push through the tear into the chest, causing new breathing or digestive symptoms that finally reveal the injury.
What makes a diaphragm injury an emergency?
It becomes an emergency when abdominal organs herniate into the chest and become trapped, cutting off their blood supply, or when the displaced organs press on the lungs and impair breathing. Severe pain, vomiting, and breathlessness after trauma need immediate care.
How is a diaphragm injury repaired?
Surgeons return any herniated organs to the abdomen and stitch the tear closed, sometimes reinforcing large defects with a mesh patch. The operation may be done through the chest or abdomen using open or minimally invasive techniques.
References
- American College of Surgeons. Trauma management resources.
- MedlinePlus, U.S. National Library of Medicine. Diaphragm and chest injuries.
- Mayo Clinic. Hiatal hernia — Symptoms and causes.
- National Institutes of Health (NIH). Thoracic trauma overview.