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Shock

Definition

Shock is a life-threatening condition that occurs when the body is not getting enough blood flow. Lack of blood flow means that the cells and organs do not get enough oxygen and nutrients to function properly. Multiple organs can suffer damage as a result. Shock requires immediate medical treatment and can get worse very rapidly. As many 1 in 5 people who suffer shock will die from it.

Considerations

The main types of shock include:

Causes

Shock can be caused by any condition that reduces blood flow, including:

Shock is often associated with heavy external or internal bleeding from a serious injury. Spinal injuries can also cause shock.

Toxic shock syndrome is an example of a type of shock from an infection.

Symptoms

A person in shock has extremely low blood pressure. Depending on the specific cause and type of shock, symptoms will include one or more of the following:

First Aid

Take the following steps if you think a person is in shock:

IF THE PERSON VOMITS OR DROOLS

Do Not

When to Contact a Medical Professional

Call 911 any time a person has symptoms of shock. Stay with the person and follow the first aid steps until medical help arrives.

Prevention

Learn ways to prevent heart disease, falls, injuries, dehydration, and other causes of shock. If you have a known allergy (for example, to insect bites or stings), carry an epinephrine pen. Your doctor will teach you how and when to use it.

References

Jones AE, Kline JA. Shock. In: Marx JA, ,Hockberger RS, Walls RM, et al, eds. Rosen's Emergency Medicine: Concepts and Clinical Practice. 8th ed. Philadelphia, Pa: Mosby Elsevier; 2013:chap 6.

Rivers EP. Approach to the patient in shock. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 106.


Review Date: 1/13/2014
Reviewed By: Jacob L. Heller, MD, MHA, Emergency Medicine, Virginia Mason Medical Center, Seattle, Washington. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team.
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. Call 911 for all medical emergencies. 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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