90564-6
LOINC Code
| LOINC code | 90564-6 | ||
|---|---|---|---|
| name | |||
| status | ACTIVE | ||
Fully-Specified Name | |||
| component | Central apnea hypopnea index | ||
| property | NRat = Number=Count/Time | ||
| time | Stdy = Duration of the study | ||
| system | ^Patient | ||
| scale | Qn = Quantitative: The result of the test is a numeric value that relates to a continuous numeric scale. Reported either as an integer, a ratio, a real number, or a range. The test result value may optionally contain a relational operator from the set {<=, <, >, >=}. Valid values for a quantitative test are of the form "7", "-7", "7.4", "-7.4", "7.8912", "0.125", "<10", "<10.15", ">12000", 1-10, 1:256 | ||
| method | |||
Additional Names | |||
| short name | AHI; Apnea+hypopnea; CAHI; Count/time; Lung; Neuro; Neurology; nRate; Number rate; Number Rate = Count/Time; PULMONARY; Pulmonology; QNT; Quan; Quant; Quantitative; Respiratory; Studies; Study; Sutdies | ||
Basic Attributes | |||
| class | PULM | ||
| type | 2 Clinical | ||
| order vs. observation | Central apnea h | ||
| formula (readable) | Central apnea hypopnea index (CAHI) = (number of central apneas [LOINC: 90553-9] + number of central hypopneas [LOINC: 90558-8]) x 60 / total sleep time (TST, in minutes) | ||
| example UCUM units | /Hour The Unified Code for Units of Measure (UCUM) is a code system intended to include all units of measures being contemporarily used in international science, engineering, and business (www.unitsofmeasure.org) | ||
Member of these Panels | |||
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History/Usage | |||
| first released | |||
| last updated | 2.65 | ||
| last change type | ADD - added | ||
| change reason | /h | ||
Related Names | |||
Copyright © 2026 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © 1995-2026, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. See https://loinc.org/license for the full LOINC copyright and license.
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