Hypovolemic shock is an emergency condition in which severe blood and fluid loss make the heart unable to pump enough blood to the body. This type of shock can cause many organs to stop working.
Shock - hypovolemic
Losing about a fifth or more of the normal amount of blood in your body causes hypovolemic shock.
Blood loss can be due to:
- Bleeding from cuts
- Bleeding from other injuries
- Internal bleeding, such as in the gastrointestinal tract
The amount of circulating blood in your body may drop when you lose too many other body fluids. This can be due to:
- Excessive perspiration
The greater and more rapid the blood loss, the more severe the symptoms of shock.
Exams and Tests
A physical exam will show signs of shock, including:
- Low blood pressure
- Low body temperature
- Rapid pulse, often weak and thready
Tests that may be done include:
- Blood chemistry, including kidney function tests and those tests looking for evidence of heart muscle damage
- Complete blood count (CBC)
- CT scan, ultrasound, or x-ray of suspected areas
- Echocardiogram (sound wave test of heart structure and function)
- Endoscopy (tube placed in the mouth to the stomach (upper endoscopy) and/or colonoscopy (tube place through the anus to the large bowel)
- Right heart (Swan-Ganz) catheterization
- Urinary catheterization (tube placed into the bladder to measure urine output)
In some cases, other tests may be done as well.
Get immediate medical help. In the meantime, follow these steps:
- Keep the person comfortable and warm (to avoid hypothermia).
- Have the person lie flat with the feet lifted about 12 inches to increase circulation. However, if the person has a head, neck, back, or leg injury, do not change the person's position unless he or she is in immediate danger.
- Do not give fluids by mouth.
- If person is having an allergic reaction, treat the allergic reaction, if you know how.
- If the person must be carried, try to keep him or her flat, with the head down and feet lifted. Stabilize the head and neck before moving a person with a suspected spinal injury.
The goal of hospital treatment is to replace blood and fluids. An intravenous (IV) line will be put into the person's arm to allow blood or blood products to be given.
Medicines such as dopamine, dobutamine, epinephrine, and norepinephrine may be needed to increase blood pressure and the amount of blood pumped out of the heart (cardiac output).
Symptoms and outcomes can vary depending on:
- Amount of blood/fluid volume lost
- Rate of blood /fluid loss
- Illness or injury causing the loss
- Underlying chronic medication conditions, such as diabetes and heart, lung, and kidney disease
In general, patients with milder degrees of shock tend to do better than those with more severe shock. Severe hypovolemic shock may lead to death, even with immediate medical attention. The elderly are more likely to have poor outcomes from shock.
- Kidney damage
- Brain damage
- Gangrene of arms or legs, sometimes leading to amputation
- Heart attack
- Other organ damage
When to Contact a Medical Professional
Hypovolemic shock is a medical emergency. Call the local emergency number (such as 911) or take the person to the emergency room.
Preventing shock is easier than trying to treat it once it happens. Quickly treating the cause will reduce the risk of developing severe shock. Early first aid can help control shock.
den Uil CA, Klijn E, Lagrand WK, Brugts JJ, Ince C, Spronk PE, Simoons ML. The microcirculation in health and critical disease. Prog Cardiovasc Dis. 2008;51:161-170.
PMID: 18774014 www.ncbi.nlm.nih.gov/pubmed/18774014.
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: Elsevier Mosby; 2013:chap 6.
Rivers E. Approach to the patient with shock. In: Goldman L, Schafer AI, eds. Goldman's Cecil Medicine. 24th ed. Philadelphia, PA: Elsevier Saunders; 2011:chap 106.
Spaniol JR, Knight AR, Zebley JL, Anderson D, Pierce JD. Fluid resuscitation therapy for hemorrhagic shock. J Trauma Nurs. 2007;14:152-156.
PMID: 18080579 www.ncbi.nlm.nih.gov/pubmed/18080579.
Tarrant AM, Ryan MF, Hamilton PA, Bejaminov O. A pictorial review of hypovolaemic shock in adults. Br J Radiol. 2008;81:252-257.
PMID: 18180262 www.ncbi.nlm.nih.gov/pubmed/18180262.
Reviewed By:Jacob L. Heller, MD, MHA, Emergency Medicine, Virginia Mason Medical Center, Seattle, WA. 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.
The Agency for Health Care Administration (Agency) and this website do not claim the information on, or referred to by, this site is error free. This site may include links to websites of other government agencies or private groups. Our Agency and this website do not control such sites and are not responsible for their content. Reference to or links to any other group, product, service, or information does not mean our Agency or this website approves of that group, product, service, or information.
Additionally, while health information provided through this website may be a valuable resource for the public, it is not designed to offer medical advice. Talk with your doctor about medical care questions you may have.