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Days in therapeutic INR range/Days INR result determined:Ratio:Pt: Patient:Qn: - CISMeF
Days in therapeutic INR range/Days INR result determined:Ratio:Pt: Patient:Qn:LOINC code
Preferred Label : Days in therapeutic INR range/Days INR result determined:Ratio:Pt: Patient:Qn:;
LOINC status : ACTIVE;
LOINC display name : Days in therapeutic INR range/Days INR result determined [Ratio];
LOINC long common name : Days in therapeutic INR range/Days INR result determined [Ratio];
LOINC short name : Ds INR range/Ds INR det Patient-Rto;
LOINC 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);
Has component