Days in therapeutic INR range/Days INR result determined [Ratio] 72281-9
LOINC Code
| LOINC code | 72281-9 | ||
|---|---|---|---|
| name | Days in therapeutic INR range/Days INR result determined [Ratio] | ||
| description | Therapeutic INR range (TTR) is a way of summarizing international normalized ratio (INR) control over time. This term identifies a patient's TTR when the Rosendaal method is used. The Rosendaal method uses linear interpolation to assign an INR value to each day between successive observed INR values. Gaps of greater than 56 days between INR values are not interpolated. After interpolation, the percentage of time during which the interpolated INR values lie within the target therapeutic range is calculated. The formula for TTR for a patient is: [Number of days that a patient's interpolated INR result is in therapeutic range] / [Number of days for which the patient has an interpolated INR result]. (See http://www.qualitymeasures.ahrq.gov/content.aspx?id=32739) | ||
| status | ACTIVE | ||
Fully-Specified Name | |||
| component | Days in therapeutic INR range/Days INR result determined | ||
| property | Ratio | ||
| time | Pt = Point in time: To identify measures at a point in time. This is a synonym for “spot” or “random” as applied to urine measurements. | ||
| 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 | Ds INR range/Ds INR det Patient-Rto | ||
Basic Attributes | |||
| class | H&P.HX.LAB | ||
| type | 1 Laboratory | ||
| order vs. observation | Both | ||
| formula (readable) | [Number of days that a patient's interpolated INR result is in therapeutic range] / [Number of days for which the patient has an interpolated INR result] | ||
| example UCUM units | % 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) | ||
| example unit | % | ||
Associated Observations | |||
LOINC codes that represent optional associated observation(s) for a clinical observation or laboratory test. A LOINC term may represent a single associated observation or panel containing several associated observations. | |||
History/Usage | |||
| test rank | 4504 of 2000 most commonly performed tests by labs in USA | ||
| first released | |||
| last updated | 2.73 | ||
| last change type | MIN - change to field other than name | ||
Related Names | |||
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Copyright © 2023 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © 1995-2023, 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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