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DLT - delta

HL7 Component Table - DLT - delta
Seq# Description Implement Flags Cardinality Length C.LEN Vocabulary Data Type
1 Normal Range [0..1]     NR
2 Numeric Threshold # [0..1]   4 NM
3 Change Computation [0..1]     0523 ID
4 Days Retained # [0..1]   4 NM

Components: <Normal Range (NR)> & <Numeric Threshold (NM)> & <Change Computation (ID)> & <Days Retained (NM)>

Subcomponents for Normal Range (NR): <Low Value (NM)> ^ <High Value (NM)>

Definition: Describes the information that controls delta check warnings.

Note: Replaces the CM data type used in section – OM2-9, as of v 2.5.

DLT-1: Normal Range (NR)

Definition: Specifies the normal interval of the reference data.

DLT-2: Numeric Threshold (NM)

Definition: The numeric threshold of the change that is detected.

For example the threshold may be set to 10.

DLT-3: Change Computation (ID)

Definition: Specifies if the change is computed as a percent change or as an absolute change. Refer to HL7 Table 0523 - Computation Type for valid values.

DLT-4: Days Retained (NM)

Definition: The length of time in days that the value is retained for computing delta checks.