Sepsis (Blood Infection) and Septic Shock

Sepsis (Blood Infection) and Septic Shock

Sepsis (Blood Infection) and Septic Shock

Sepsis is a serious medical condition caused by an overwhelming immune response to infection. 

Chemicals released into the blood to fight infection trigger widespread inflammation.

Inflammation may result in organ damage. Blood clotting during sepsis reduces blood flow to 

limbs and internal organs, depriving them of nutrients and oxygen. In severe cases, one or 

more organs fail. In the worst cases, infection leads to a life-threatening drop in blood pressure, 

called septic shock. This can quickly lead to the failure of several organs -- lungs, kidneys, and liver -- 

causing death.

Sepsis occurs in 1% to 2% of all hospitalizations in the U.S. It affects at least 750,000 people each year.

The term sepsis is often used interchangeably with septicemia, a serious, life-threatening infection 

that gets worse very quickly and is often fatal.

Sepsis Causes and Risk Factors

Bacterial infections are the most common cause of sepsis. However, sepsis can also be caused 

by other infections. The infection can begin anywhere bacteria or other infectious agents can 

enter the body. It can result from something as seemingly harmless as a scraped knee or nicked 

cuticle or from a more serious medical problem such as appendicitis, pneumonia, meningitis, or 

a urinary tract infection.

Sepsis may accompany infection of the bone, called osteomyelitis. In hospitalized patients, 

common sites of initial infection include IV lines, surgical incisions, urinary catheters, and bed sores.


Although anyone can get sepsis, certain groups of people are at greater risk. They include:

People whose immune systems are not functioning well due to illnesses such as HIV/AIDS or cancer 

or use of drugs that suppress the immune system, such as those to prevent rejection of

transplanted organs Very young babies
The elderly, particularly if they have other health problems
People who have recently been hospitalized and/or had invasive medical procedures
People with diabetes


Sepsis Symptoms

Because sepsis can begin in different parts of the body, it can have many different symptoms. 

Rapid breathing and a change in mental status, such as reduced alertness or confusion, 

may be the first signs that sepsis is starting. Other common symptoms include:

Fever and shaking chills or, alternatively, a very low body temperature
Decreased urination
Rapid pulse
Rapid breathing
Nausea and vomiting
Diarrhea


Sepsis Treatment

The first step to successful treatment for sepsis is quick diagnosis. If sepsis is suspected, 

the doctor will perform an exam and run tests to look for:

Bacteria in the blood or other body fluids
Source of the infection, using imaging technology such as X-ray, CT scan, or ultrasound
A high or low white blood cell count
A low platelet count
Low blood pressure
Too much acid in the blood (acidosis)
Altered kidney or liver function
Other tests of bodily fluids and radiologic tests, such as X-ray or CT scan, can help in diagnosing 

the cause of the infection. People diagnosed with severe sepsis are usually placed in the intensive 

care unit (ICU), where doctors try to stop the infection, keep vital organs functioning, and 

regulate blood pressure.


Sepsis treatment usually begins with:

Broad-spectrum antibiotics, which kill many types of bacteria
IV fluids to maintain blood pressure
Oxygen to maintain normal blood oxygen
Once the infectious agent is identified, the doctor can switch to a drug that targets that particular 

agent. Depending on the severity and effects of sepsis, other types of treatment, such as a 

breathing machine or kidney dialysis, may be needed. Sometimes surgery is necessary to 

drain or clean an infection.

Often doctors prescribe other treatments, including vasopressors 

(drugs that cause the blood vessels to narrow) to improve blood pressure.

Permanent organ damage can occur in people who survive sepsis. Death rates are 20% 

for sepsis and over 60% for septic shock.

Source: WebMd