Decrease (-) Restore Default Increase (+)
Bookmark and Share

Health Library

Multimedia Health Encyclopedia - Injuries

Search Health Information   
 

Unconsciousness - first aid

Definition

Unconsciousness is when a person is unable to respond to people and activities. Often, this is called a coma or being in a comatose state.

Other changes in awareness can occur without becoming unconscious. Medically, these are called "altered mental status" or "changed mental status." They include sudden confusion, disorientation, or stupor.

Unconsciousness or any other sudden change in mental status must be treated as a medical emergency.

If someone is awake but less alert than usual, ask a few simple questions, such as:

  • What is your name?
  • What is the date?
  • How old are you?

Wrong answers or an inability to answer the question suggest a change in mental status.

Alternative Names

Loss of consciousness - first aid; Coma - first aid; Mental status change; Altered mental status

Considerations

Being asleep is not the same thing as being unconscious. A sleeping person will respond to loud noises or gentle shaking -- an unconscious person will not.

An unconscious person cannot cough or clear his or her throat. This can lead to death if the airway becomes blocked.

Causes

Unconsciousness can be caused by nearly any major illness or injury, as well as substance abuse and alcohol use.

Brief unconsciousness (or fainting) is often caused by dehydration, low blood sugar, or temporary low blood pressure. However, it can also be caused by serious heart or nervous system problems. Your doctor will determine if you need tests.

Other causes of fainting include straining during a bowel movement, coughing very hard, or breathing very fast (hyperventilating).

Symptoms

The person will be unresponsive (does not respond to activity, touch, sound, or other stimulation).

The following symptoms may occur after a person has been unconscious:

  • Confusion
  • Drowsiness
  • Headache
  • Inability to speak or move parts of his or her body (see stroke symptoms)
  • Lightheadedness
  • Loss of bowel or bladder control (incontinence)
  • Rapid heartbeat (palpitations)
  • Stupor

First Aid

  1. Call or tell someone to call 911.
  2. Check the person's airway, breathing, and pulse frequently. If necessary, begin rescue breathing and CPR.
  3. If the person is breathing and lying on the back, and you do not think there is a spinal injury, carefully roll the person toward you onto the side. Bend the top leg so both hip and knee are at right angles. Gently tilt the head back to keep the airway open. If breathing or pulse stops at any time, roll the person on to his back and begin CPR.
  4. If you think there is a spinal injury, leave the person where you found them (as long as breathing continues). If the person vomits, roll the entire body at one time to the side. Support the neck and back to keep the head and body in the same position while you roll.
  5. Keep the person warm until medical help arrives.
  6. If you see a person fainting, try to prevent a fall. Lay the person flat on the floor and raise the feet about 12 inches.
  7. If fainting is likely due to low blood sugar, give the person something sweet to eat or drink when they become conscious.

Do Not

  • Do NOT give an unconscious person any food or drink.
  • Do NOT leave the person alone.
  • Do NOT place a pillow under the head of an unconscious person.
  • Do NOT slap an unconscious person's face or splash water on the face to try to revive him.

Call immediately for emergency medical assistance if

Call 911 if the person is unconscious and:

  • Does not return to consciousness quickly (within a minute)
  • Has fallen down or been injured, especially if bleeding
  • Has diabetes
  • Has seizures
  • Has lost bowel or bladder control
  • Is not breathing
  • Is pregnant
  • Is over age 50

Call 911 if the person regains consciousness but:

  • Feels chest pain, pressure, or discomfort, or has a pounding or irregular heartbeat
  • Can't speak, has vision problems, or can't move the arms and legs

Prevention

  • Avoid situations where your blood sugar level gets too low.
  • Avoid standing in one place too long without moving, especially if you are prone to fainting.
  • Get enough fluid, particularly in warm weather.
  • If you feel like you are about to faint, lie down or sit with your head bent forward between your knees.

People with known medical conditions, such as diabetes, should always wear a medical alert tag or bracelet.

References

Cooke JL. Depressed consciousness and coma. In: Marx JA, Hockberger RS, Walls RM, et al., eds. Rosen’s Emergency Medicine: Concepts and Clinical Practice. 7th ed. Philadelphia, Pa: Mosby Elsevier; 2009:chap 14.

Biros MH, Heegaard WG. Head injury. In: Marx JA, Hockberger RS, Walls RM, et al., eds. Rosen’s Emergency Medicine: Concepts and Clinical Practice. 7th ed. Philadelphia, Pa: Mosby Elsevier; 2009:chap 38.

Kothari RU, Crocco TJ, Barsan WG. Stroke. In: Marx J, ed. Rosen’s Emergency Medicine: Concepts and Clinical Practice. 6th ed. Philadelphia, Pa: Mosby Elsevier; 2006:chap 99.


Review Date: 7/16/2011
Reviewed By: Jacob L. Heller, MD, MHA, Emergency Medicine, Virginia Mason Medical Center, Seattle, Washington, Clinic. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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.
adam.com
 

Medical Care

Cancer
Pregnancy & Prenatal Classes
Weight Loss
Orthopedics
Heart Disease
Neurology
Women's Health
More Medical Care

Locations

Hospitals
Immediate Care
Health Centers
Emergency Room
Doctors Offices
Specialists
Affiliate Hospitals

Patients and Visitors

MyChart
Pay Your Bill
Request an Appointment
Get Healthy
Support Groups
Fitness Groups
Mobile Applications
Clinical Trials
Online Nursery
Classes and Events
Send an eCard
Patient Stories
Places to Stay

About Us

Quality Report 
Careers
Ways to Help
Community Outreach
Contact Us
(502) 629-1234

Connect with us

© 2014 Norton Healthcare
Serving Kentucky and Southern Indiana