World Library  
Flag as Inappropriate
Email this Article

Respiratory depression

Article Id: WHEBN0000805992
Reproduction Date:

Title: Respiratory depression  
Author: World Heritage Encyclopedia
Language: English
Subject: Flunitrazepam, Amanita muscaria, Tramadol, Opioid, Hypokalemia, Oxazepam, Short-term effects of alcohol
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Respiratory depression

Not to be confused with hypopnea or hyperventilation.
Hypoventilation
ICD-10 9 DiseasesDB MedlinePlus eMedicine MeSH D007040

In medicine, hypoventilation (also known as respiratory depression) occurs when ventilation is inadequate[1] (hypo meaning "below") to perform needed gas exchange. By definition it causes an increased concentration of carbon dioxide (hypercapnia) and respiratory acidosis.

Causes

It can be caused by medical conditions, such as stroke affecting the brainstem, by holding one's breath, or by drugs, typically when taken in overdose. Hypocapnia also stimulates hypoventilation.

Effects

As a side effect of medicines or recreational drugs, hypoventilation may become potentially life-threatening. Many different CNS depressant drugs such as alcohol, benzodiazepines, barbiturates, GHB, sedatives and opiates produce respiratory depression when taken in large or excessive doses; however this is most commonly seen as a cause of death with opiates or opioids, particularly when they are combined with sedatives such as alcohol or benzodiazepines. Strong opiates, (fentanyl, heroin, morphine, etc.), barbiturates, and the benzodiazepine, temazepam, are notorious for producing this effect; in an overdose, an individual may cease breathing entirely (go into respiratory arrest) which is rapidly fatal without treatment.

Treatment

Respiratory stimulants such as nikethamide were traditionally used to counteract respiratory depression from CNS depressant overdose, but were of only limited effectiveness. A new respiratory stimulant drug BIMU8 is currently being investigated which seems to be significantly more effective and may be useful for counteracting the respiratory depression produced by opiates and similar drugs without offsetting their therapeutic effects.

If the respiratory depression is from opioid overdose, then the overdose itself is usually treated with an inverse agonist, most likely naloxone, which will itself almost instantaneously stop the respiratory depression if caused by an opioid (and also, depending on the dose, plunge the patient into precipitated withdrawal).

Associated conditions

Disorders referred to as "Congenital Central Hypoventilation Syndrome" or "CCHS" and "Rapid-Onset Obesity, Hypothalamic Dysfunction, Hypoventilation, with Autonomic Dysregulation" or ROHHAD are recognized. CCHS condition may be a significant factor in some cases of sudden infant death syndrome or SIDS, often termed "cot death" or "crib death."

The opposite condition is hyperventilation (too much ventilation), resulting in low carbon dioxide levels (hypocapnia), rather than hypercapnia.

See also

  • List of terms of lung size and activity
  • Dyspnea

References

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.