Hypovolemia

Revision as of 13:31, 24 July 2013 by Farman Khan (talk | contribs)
Jump to navigation Jump to search

WikiDoc Resources for Hypovolemia

Articles

Most recent articles on Hypovolemia

Most cited articles on Hypovolemia

Review articles on Hypovolemia

Articles on Hypovolemia in N Eng J Med, Lancet, BMJ

Media

Powerpoint slides on Hypovolemia

Images of Hypovolemia

Photos of Hypovolemia

Podcasts & MP3s on Hypovolemia

Videos on Hypovolemia

Evidence Based Medicine

Cochrane Collaboration on Hypovolemia

Bandolier on Hypovolemia

TRIP on Hypovolemia

Clinical Trials

Ongoing Trials on Hypovolemia at Clinical Trials.gov

Trial results on Hypovolemia

Clinical Trials on Hypovolemia at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Hypovolemia

NICE Guidance on Hypovolemia

NHS PRODIGY Guidance

FDA on Hypovolemia

CDC on Hypovolemia

Books

Books on Hypovolemia

News

Hypovolemia in the news

Be alerted to news on Hypovolemia

News trends on Hypovolemia

Commentary

Blogs on Hypovolemia

Definitions

Definitions of Hypovolemia

Patient Resources / Community

Patient resources on Hypovolemia

Discussion groups on Hypovolemia

Patient Handouts on Hypovolemia

Directions to Hospitals Treating Hypovolemia

Risk calculators and risk factors for Hypovolemia

Healthcare Provider Resources

Symptoms of Hypovolemia

Causes & Risk Factors for Hypovolemia

Diagnostic studies for Hypovolemia

Treatment of Hypovolemia

Continuing Medical Education (CME)

CME Programs on Hypovolemia

International

Hypovolemia en Espanol

Hypovolemia en Francais

Business

Hypovolemia in the Marketplace

Patents on Hypovolemia

Experimental / Informatics

List of terms related to Hypovolemia

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] ; Associate Editor(s)-in-Chief: Aditya Govindavarjhulla, M.B.B.S. [2]

Synonyms and keywords: hypovolaemia; hypovolemic.

Overview

Hypovolemia is a state of decreased blood volume; more specifically, decrease in volume of blood plasma.

Causes

Common Causes

Causes by Organ System

Cardiovascular No underlying causes
Chemical/Poisoning No underlying causes
Dental No underlying causes
Dermatologic No underlying causes
Drug Side Effect No underlying causes
Ear Nose Throat No underlying causes
Endocrine No underlying causes
Environmental No underlying causes
Gastroenterologic No underlying causes
Genetic No underlying causes
Hematologic No underlying causes
Iatrogenic No underlying causes
Infectious Disease No underlying causes
Musculoskeletal/Orthopedic No underlying causes
Neurologic No underlying causes
Nutritional/Metabolic No underlying causes
Obstetric/Gynecologic No underlying causes
Oncologic No underlying causes
Ophthalmologic No underlying causes
Overdose/Toxicity No underlying causes
Psychiatric No underlying causes
Pulmonary No underlying causes
Renal/Electrolyte No underlying causes
Rheumatology/Immunology/Allergy No underlying causes
Sexual No underlying causes
Trauma No underlying causes
Urologic No underlying causes
Miscellaneous No underlying causes

Causes in Alphabetical Order

Natural History, Complications and Prognosis

Severe hypovolemia may lead to hypovolemic shock which in turn can be associated with multiple organ failure, renal failure, brain damage, coma and death (desanguination).Note that in children, compensation can result in an artificially high blood pressure despite hypovolemia.This is another reason (aside from initial lower blood volume) that even the possibility of internal bleeding in children should always be treated aggressively.People can bleed to death internally without any external blood loss.

Diagnosis

Clinical symptoms may not present until 10-20% of total whole-blood volume is lost. Also consider possible mechanisms of injury (especially the steering wheel and/or use/non-use of seat belt in motor vehicle accidents) that may have caused internal bleeding such as ruptured or bruised internal organs.If trained to do so and the situation permits, conduct a secondary survey and check the chest and abdominal cavities for pain, deformity, guarding or swelling.(Injuries to the pelvis and bleeding into the thigh from the femoral artery can also be life-threatening.)

Symptoms

The patient may feel :

Physical Examination

  • Low blood pressure and the absence of perfusion
  • Pale skin

Treatment

Minor hypovolemia from a known cause that has been completely controlled (such as a blood transfusion from a healthy patient who is not anemic) may be countered with initial rest for up to half an hour, oral fluids including moderate sugars (apple juice is good) and the advice to the donor to eat good solid meals with proteins for the next few days.Typically, this would involve a fluid volume of less than one liter (1000 ml), although this is highly dependent on body weight.Larger people can tolerate slightly more blood loss than smaller people.More serious hypovolemia should be assessed by a nurse or doctor.When in doubt, treat hypovolemia aggressively.Note that in children, compensation can result in an artificially high blood pressure despite hypovolemia.

First Aid

External bleeding should be controlled by direct pressure. If direct pressure fails, other techniques such as elevation and pressure points should be considered. The tourniquet should be used in the case of massive hemorrhage i.e. arterial bleeds, such as the femoral artery. If a first-aider recognizes internal bleeding, the life-saving measure to take is to immediately call for emergency assistance.

Field Care

Emergency oxygen should be immediately employed to increase the efficiency of the patient's remaining blood supply.This intervention can be life-saving.

The use of intravenous fluids(IVs) may help compensate for lost fluid volume, but IV fluids cannot carry oxygen in the way that blood can.See also emergency medical services for a discussion of techniques used in IV fluid management of hypovolemia.

Hospital Treatment

If the hypovolemia was caused by medication, the administration of antidotes may be appropriate but should be carefully monitored to avoid shock or the emergence of other pre-existing conditions.

Blood transfusions coupled with surgical repair are the definitive treatment for hypovolemia caused by trauma.See also the discussion of shock and the importance of treating reversible shock while it can still be countered.

References

Related Chapters

External Links

de:Hypovolämie fi:hypovolemia


Template:WikiDoc Sources