Respiratory failure: Difference between revisions
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Revision as of 14:14, 11 August 2012
Respiratory failure | |
ICD-10 | J96 |
---|---|
ICD-9 | 518.81 |
DiseasesDB | 6623 |
MeSH | D012131 |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-In-Chief: Cafer Zorkun, M.D., Ph.D. [2] M.Umer Tariq [3]
Overview
Respiratory failure is a medical term for inadequate gas exchange by the respiratory system. Respiratory failure can be indicated by observing a drop in blood oxygen level (hypoxemia) and/or a rise in arterial carbon dioxide (hypercapnia) which can be written as (PaO2 < 60 mmHg, PaCO2 >45 mmHg).
Classification into type I or type II relates to the absence or presence of hypercapnia respectively. (Values in kPA being PO2 below 8kPA and PCO2 above 6.7kPa
Types
Type 1
- Type 1 respiratory failure is defined as hypoxia without hypercapnia, indeed the CO2 level may be normal or low. It is typically caused by a ventilation/perfusion mismatch; the air flowing in and out of the lungs is not matched with the flow of blood to the lungs. This type is caused by conditions that affect oxygenation like:
1.parenchymal disease (v-q mismatch)
2.diseases of vasculature and shunts.
Type 2
- Type 2 respiratory failure is defined build up of carbon dioxide that has been generated by the body. The underlying causes are reduced breathing effort (in the fatigued patient), increased resistance to breathing (such as in asthma) or an increase in the area of the lung that is not available for gas exchange (such as in emphysema).
Causes of Hypoventilation
Drugs
- Codeine,
- Clozapine,
- Fentanyl,
- Gamma-Hydroxybutyric acid,
- Heroin,
- Ketamine,
- Lidocaine,
- Labetalol,
- Lorazepam,
- Morphine,
- Nitrazepam,
- Opiate,
- Oxymorphone,
- Procainamide (patient information),
- Sodium thiopental,
- Triazolam,
- Zopiclone,
more on Dyspnea
Complete Differential Diagnosis of Causes of Respiratory Failure
(In alphabetical order)
Complete Differential Diagnosis of the Causes of Respiratory failure
(By organ system)
Treatment
Emergency treatment follows the principles of cardiopulmonary resuscitation. Treatment of the underlying cause is required. Mechanical ventilation may be required.
External Links
eMedicine Respiratory Failure [4]
Template:Respiratory pathology
de:Ateminsuffizienz
no:Respirasjonssvikt
fr:Insuffisance respiratoire