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In [[medicine]], '''hypoventilation''' (also known as '''respiratory depression''') occurs when ventilation is inadequate (''hypo'' means "below") to perform needed [[gas exchange]]. It generally causes an increased concentration of [[carbon dioxide]] ([[hypercapnia]]) and [[respiratory acidosis]]. It can be caused by medical conditions, by holding one's breath, or by [[medication|drugs]], typically when taken in [[overdose]].  Hypoventilation may be dangerous for those with [[sleep apnea]].
In [[medicine]], '''hypoventilation''' (also known as '''respiratory depression''') occurs when ventilation is inadequate (''hypo'' means "below") to perform needed [[gas exchange]]. It generally causes an increased concentration of [[carbon dioxide]] ([[hypercapnia]]) and [[respiratory acidosis]]. It can be caused by medical conditions, by holding one's breath, or by [[medication|drugs]], typically when taken in [[overdose]].  Hypoventilation may be dangerous for those with [[sleep apnea]].


As a [[adverse drug reaction|side effect]] of medicines or [[recreational drug]]s, hypoventilation may become potentially life-threatening. Many different CNS [[depressant]] drugs such as [[Alcoholic beverage|alcohol]], [[benzodiazepines]], [[barbiturates]], [[GHB]] 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 or opioids such as [[heroin]] and [[fentanyl]] 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.
As a [[adverse drug reaction|side effect]] of medicines or [[recreational drug]]s, hypoventilation may become potentially life-threatening.  
==Causes==
====CNS Depressant Drugs===
* [[Alcoholic beverage|alcohol]]
* Tramadol
=====Narcotics=====
* [[Heroin]]
* Benzodiazepines
* Barbiturates
=====Opiates=====
* Full agonist
:* [[Codeine]]
:* [[Oxycodone]]
:* [[Fentanyl]]
:* [[Morphine]]
:* [[Methadone]]
:* [[Levonorphal]]
* Partial agonist
:* [[Pentazocine]]
:* [[Butorphanol]]
:* [[Nalbuphine]]
:* [[Buprenorphine]]
=====Benzodiazepines=====
* Long acting
:* [[Flurazepam]]
:* [[Diazepam]]
:* [[Prazepam]]
*Intermediate acting
:* [[Lorazepam]]
:* [[Estazolam]]
:* [[Temazepam]]
:* [[Oxazepam]]
:* [[Alprazolam]]
* Short acting
:* [[Triazolam]]
:* [[Midazolam]]


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 or recreational effects.
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 or recreational effects.

Revision as of 15:00, 4 December 2014

Hypoventilation
ICD-10 R06.8
DiseasesDB 29214
MeSH D007040

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

In medicine, hypoventilation (also known as respiratory depression) occurs when ventilation is inadequate (hypo means "below") to perform needed gas exchange. It generally causes an increased concentration of carbon dioxide (hypercapnia) and respiratory acidosis. It can be caused by medical conditions, by holding one's breath, or by drugs, typically when taken in overdose. Hypoventilation may be dangerous for those with sleep apnea.

As a side effect of medicines or recreational drugs, hypoventilation may become potentially life-threatening.

Causes

=CNS Depressant Drugs

Narcotics
  • Heroin
  • Benzodiazepines
  • Barbiturates
Opiates
  • Full agonist
  • Partial agonist
Benzodiazepines
  • Long acting
  • Intermediate acting
  • Short acting

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 or recreational effects.

A disorder referred to as "Congenital Central Hypoventilation Syndrome" or "CCHS" is recognized. This condition may be a significant factor in some cases of sudden infant death syndrome or "cot death".

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

Related Chapter

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