Obesity hypoventilation syndrome laboratory findings: Difference between revisions
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==Laboratory Findings== | ==Laboratory Findings== | ||
If OHS is suspected, various tests are required for its confirmation. [[Arterial blood gas]] levels are determined to measure oxygen and carbon dioxide levels; this requires a blood sample from an [[artery]], usually the [[radial artery]]. | If OHS is suspected, various tests are required for its confirmation. [[Arterial blood gas]] levels are determined to measure oxygen and carbon dioxide levels; this requires a blood sample from an [[artery]], usually the [[radial artery]]. | ||
Formal criteria for diagnosis of OHS are: | |||
* [[Body mass index]] over 30 kg/m<sup>2</sup> (a measure of obesity, obtained by taking ones weight in kilograms and dividing it by ones height in meters squared) | |||
* Arterial carbon dioxide level over 45 [[Torr|mmHg]] or 6.0 [[Pascal (unit)|kPa]] as determined by [[arterial blood gas]] measurement | |||
* No alternative explanation for hypoventilation, such as use of [[narcotic]]s | |||
==References== | ==References== | ||
{{reflist|2}} | {{reflist|2}} | ||
Latest revision as of 13:28, 24 September 2012
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Laboratory Findings
If OHS is suspected, various tests are required for its confirmation. Arterial blood gas levels are determined to measure oxygen and carbon dioxide levels; this requires a blood sample from an artery, usually the radial artery.
Formal criteria for diagnosis of OHS are:
- Body mass index over 30 kg/m2 (a measure of obesity, obtained by taking ones weight in kilograms and dividing it by ones height in meters squared)
- Arterial carbon dioxide level over 45 mmHg or 6.0 kPa as determined by arterial blood gas measurement
- No alternative explanation for hypoventilation, such as use of narcotics