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    Septic shock

    Bacteremic shock; Endotoxic shock; Septicemic shock; Warm shock

    Septic shock is a serious condition that occurs when an overwhelming infection leads to life-threatening low blood pressure.

    Causes

    Septic shock occurs most often in the very old and the very young. It also occurs in people who have other illnesses, especially if they have a weakened immune system.

    Any type of bacteria can cause septic shock. Fungi and (rarely) viruses may also cause the condition. Toxins released by the bacteria or fungi may cause tissue damage, and may lead to low blood pressure and poor organ function. Some researchers think that blood clots in small arteries cause the lack of blood flow and poor organ function.

    The body also produces a strong inflammatory response to the toxins. This inflammation may contribute to organ damage.

    Risk factors for septic shock include:

    • Diabetes
    • Diseases of the genitourinary system, biliary system, or intestinal system
    • Diseases that weaken the immune system such as AIDS
    • Indwelling catheters (those that remain in place for extended periods, especially intravenous lines and urinary catheters and plastic and metal stents used for drainage)
    • Leukemia
    • Long-term use of antibiotics
    • Lymphoma
    • Recent infection
    • Recent surgery or medical procedure
    • Recent use of steroid medications

    Symptoms

    Septic shock can affect any part of the body, including the heart, brain, kidneys, liver, and intestines. Symptoms may include:

    • Cool, pale arms and legs
    • High or very low temperature, chills
    • Lightheadedness
    • Little or no urine
    • Low blood pressure, especially when standing
    • Palpitations
    • Rapid heart rate
    • Restlessness, agitation, lethargy, or confusion
    • Shortness of breath
    • Skin rash or discoloration

    Exams and Tests

    Blood tests may be done to check for infection, low blood oxygen level, disturbances in the body's acid-base balance, or poor organ function or organ failure.

    A chest x-ray may show pneumonia or fluid in the lungs (pulmonary edema).

    A urine sample may show infection.

    Additional studies, such as blood cultures, may not become positive for several days after the blood has been taken, or for several days after the shock has developed.

    Treatment

    Septic shock is a medical emergency. Patients are usually admitted to the intensive care unit of the hospital.

    Treatment may include:

    • Breathing machine (mechanical ventilation)
    • Dialysis
    • Drugs to treat low blood pressure, infection, or blood clotting
    • Fluids given directly into a vein (intravenously)
    • Oxygen
    • Sedatives
    • Surgery

    There are new drugs that act against the extreme inflammatory response seen in septic shock. These may help limit organ damage.

    The pressure in the heart and lungs may be checked. This is called hemodynamic monitoring. This can only be done with special equipment and intensive care nursing.

    Outlook (Prognosis)

    Septic shock has a high death rate. The death rate depends on the patient's age and overall health, the cause of the infection, how many organs have failed, and how quickly and aggressively medical therapy is started.

    Possible Complications

    Respiratory failure, cardiac failure, or any other organ failure can occur. Gangrene may occur, possibly leading to amputation.

    When to Contact a Medical Professional

    Go directly to an emergency department if you develop symptoms of septic shock.

    Prevention

    Prompt treatment of bacterial infectionsis helpful. However, many cases of septic shock cannot be prevented.

    References

    Vincent J, Septic Shock. In: Fink MP, Abraham E, Vincent J, Kochanek PM, eds. Textbook of Critical Care. 5th ed. Philadelphia, Pa: Saunders Elsevier; 2005: chap 147.

    Jones AE, Kline JA. Shock. In: Marx, JA, ed. Rosen's Emergency Medicine: Concepts and Clinical Practice. 7th ed. Philadelphia, Pa: Mosby Elsevier; 2009: chap 4.

    Munford RS. Severe sepsis and septic shock. In: Fauci AS, Harrison TR, eds. Harrison's Principles of Internal Medicine. 17th ed. New York, NY: McGraw Hill; 2008:chap 265.

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            Self Care

              Tests for Septic shock

                Review Date: 1/8/2012

                Reviewed By: Denis Hadjiliadis, MD, Assistant Professor of Medicine, Division of Pulmonary, Allergy and Critical Care, University of Pennsylvania, Philadelphia, PA. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, David R. Eltz, Stephanie Slon, and Nissi Wang.

                The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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