Sepsis is a potentially life-threatening complication of an infection. While sepsis can happen to anyone, it's most common and most dangerous in people who are elderly or who have weakened immune systems.
Sepsis occurs when chemicals released into the bloodstream to fight the infection trigger inflammation throughout the body. This inflammation creates microscopic blood clots that can block nutrients and oxygen from reaching organs, causing them to fail. If sepsis progresses to septic shock, blood pressure drops dramatically and the person may die.
Early treatment of sepsis, usually with antibiotics and large amounts of intravenous fluids, improves chances for survival.
Many doctors view sepsis as a three-stage syndrome, starting with sepsis and progressing through severe sepsis to septic shock. The goal is to treat sepsis during its mild stage, before it becomes more dangerous.
When to see a doctor
While any type of infection can lead to sepsis, the most likely varieties include:
The incidence of sepsis appears to be increasing in the United States. The causes of this increase may include:
Sepsis is more common and more dangerous in people who:
As sepsis worsens, blood flow to vital organs, such as your brain, heart and kidneys, becomes impaired. Sepsis can also cause blood clots to form in your organs and in your arms, legs, fingers and toes — leading to varying degrees of organ failure and tissue death (gangrene).
Most people recover from mild sepsis, but the mortality rate for severe sepsis or septic shock is close to 50 percent.
Tests and diagnosis
Diagnosing sepsis can be difficult because its signs and symptoms can be caused by other disorders. Doctors often order a battery of tests to try to pinpoint the underlying infection.
Other laboratory tests
Treatments and drugs
Early, aggressive treatment boosts your chances of surviving sepsis. People with severe sepsis require close monitoring and treatment in a hospital intensive care unit. If you have severe sepsis or septic shock, lifesaving measures may be needed to stabilize breathing and heart function.
Last Updated: 2011-07-22
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