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18.8.175 TCD - Test Code Detail Segment (13.4.10)

The test code detail segment contains the data necessary to perform operations or calculations, or execute decisions by the laboratory automation system, and which are not supported by the original HL7 segments related to orders (ORC, OBR). For detail of use see messages of laboratory orders and observations in chapters 4 and 7.

HL7 Attribute Table - TCD - Test Code Detail

Base Framework
Seq#Data ElementDescriptionFlagsImplementCardinalityLengthC.LENVocabularyData Type
TCD
100238Universal Service Identifier SHOULD[1..1] 
CWE

Coded with Exceptions

201420Auto-Dilution Factor  MAY[0..1] 
SN

Structured Numeric

301421Rerun Dilution Factor  MAY[0..1] 
SN

Structured Numeric

401422Pre-Dilution Factor  MAY[0..1] 
SN

Structured Numeric

501413Endogenous Content of Pre-Dilution Diluent MAY[0..1] 
SN

Structured Numeric

601416Automatic Repeat Allowed MAY[0..1][1..1]univ: Yes/noIndicator (CD) hl7VS-yes-no-Indicator (VS) expandedYes-NoIndicator (CS)
ID

Coded Value for HL7 Defined Tables

701424Reflex Allowed MAY[0..1][1..1]univ: Yes/noIndicator (CD) hl7VS-yes-no-Indicator (VS) expandedYes-NoIndicator (CS)
ID

Coded Value for HL7 Defined Tables

801425Analyte Repeat Status MAY[0..1] univ: AnalyteRepeatStatus (CD)
CWE

Coded with Exceptions

903490Specimen Consumption Quantity MAY[0..1] 
CQ

Composite Quantity with Units

1003493Pool Size MAY[0..1] 
NM

Numeric

1103494Auto-Dilution Type MAY[0..1] ex.:Auto-dilutionType (CD)
CWE

Coded with Exceptions

Seq#Data ElementDescriptionFlagsImplementCardinalityLengthC.LENVocabularyData Type
TCD
100238Universal Service Identifier SHALL[1..1] 
CWE

Coded with Exceptions

201420Auto-Dilution Factor  MAY[0..1] 
SN

Structured Numeric

301421Rerun Dilution Factor  MAY[0..1] 
SN

Structured Numeric

401422Pre-Dilution Factor  MAY[0..1] 
SN

Structured Numeric

501413Endogenous Content of Pre-Dilution Diluent MAY[0..1] 
SN

Structured Numeric

601416Automatic Repeat Allowed MAY[0..1][1..1]univ: Yes/noIndicator (CD) hl7VS-yes-no-Indicator (VS) expandedYes-NoIndicator (CS)
ID

Coded Value for HL7 Defined Tables

701424Reflex Allowed MAY[0..1][1..1]univ: Yes/noIndicator (CD) hl7VS-yes-no-Indicator (VS) expandedYes-NoIndicator (CS)
ID

Coded Value for HL7 Defined Tables

801425Analyte Repeat Status MAY[0..1] univ: AnalyteRepeatStatus (CD) hl7VS-analyteRepeatStatus (VS) analyteRepeatStatus (CS)
CWE

Coded with Exceptions

903490Specimen Consumption Quantity MAY[0..1] 
CQ

Composite Quantity with Units

1003493Pool Size MAY[0..1] 
NM

Numeric

1103494Auto-Dilution Type MAY[0..1] ex.:Auto-dilutionType (CD) hl7VS-auto-DilutionType (VS) auto-DilutionType (CS)
CWE

Coded with Exceptions

Base FrameworkBase Standard Profile
Seq#Data ElementDescriptionFlagsImplementCardinalityLengthC.LENVocabularyData TypeImplementVocabulary
TCD 
100238Universal Service Identifier SHOULD[1..1] 
CWE

Coded with Exceptions

SHALL
201420Auto-Dilution Factor  MAY[0..1] 
SN

Structured Numeric

MAY
301421Rerun Dilution Factor  MAY[0..1] 
SN

Structured Numeric

MAY
401422Pre-Dilution Factor  MAY[0..1] 
SN

Structured Numeric

MAY
501413Endogenous Content of Pre-Dilution Diluent MAY[0..1] 
SN

Structured Numeric

MAY
601416Automatic Repeat Allowed MAY[0..1][1..1]univ: Yes/noIndicator (CD) hl7VS-yes-no-Indicator (VS) expandedYes-NoIndicator (CS)
ID

Coded Value for HL7 Defined Tables

MAY 
701424Reflex Allowed MAY[0..1][1..1]univ: Yes/noIndicator (CD) hl7VS-yes-no-Indicator (VS) expandedYes-NoIndicator (CS)
ID

Coded Value for HL7 Defined Tables

MAY 
801425Analyte Repeat Status MAY[0..1] univ: AnalyteRepeatStatus (CD)
CWE

Coded with Exceptions

MAYhl7VS-analyteRepeatStatus (VS) analyteRepeatStatus (CS)
903490Specimen Consumption Quantity MAY[0..1] 
CQ

Composite Quantity with Units

MAY
1003493Pool Size MAY[0..1] 
NM

Numeric

MAY
1103494Auto-Dilution Type MAY[0..1] ex.:Auto-dilutionType (CD)
CWE

Coded with Exceptions

MAYhl7VS-auto-DilutionType (VS) auto-DilutionType (CS)
Base Framework Base Standard Profile
Seq# Data Element Description Flags Optionality Repetition Length C.LEN Table Data Type Optionality Table
TCD  
1 00238 Universal Service Identifier   O      
CWE

Coded with Exceptions

R  
2 01420 Auto-Dilution Factor   O      
SN

Structured Numeric

   
3 01421 Rerun Dilution Factor   O      
SN

Structured Numeric

   
4 01422 Pre-Dilution Factor   O      
SN

Structured Numeric

   
5 01413 Endogenous Content of Pre-Dilution Diluent   O      
SN

Structured Numeric

   
6 01416 Automatic Repeat Allowed   O   [1..1]  
ID

Coded Value for HL7 Defined Tables

  (0136)
7 01424 Reflex Allowed   O   [1..1]  
ID

Coded Value for HL7 Defined Tables

  (0136)
8 01425 Analyte Repeat Status   O      
CWE

Coded with Exceptions

  (0389)
9 03490 Specimen Consumption Quantity   O      
CQ

Composite Quantity with Units

   
10 03493 Pool Size   O      
NM

Numeric

   
11 03494 Auto-Dilution Type   O      
CWE

Coded with Exceptions

  (0945)
Seq# Data Element Description Optionality Repetition Length C.LEN Table Data Type
TCD
1 00238 Universal Service Identifier R      
CWE

Coded with Exceptions

2 01420 Auto-Dilution Factor O      
SN

Structured Numeric

3 01421 Rerun Dilution Factor O      
SN

Structured Numeric

4 01422 Pre-Dilution Factor O      
SN

Structured Numeric

5 01413 Endogenous Content of Pre-Dilution Diluent O      
SN

Structured Numeric

6 01416 Automatic Repeat Allowed O   [1..1] (0136)
ID

Coded Value for HL7 Defined Tables

7 01424 Reflex Allowed O   [1..1] (0136)
ID

Coded Value for HL7 Defined Tables

8 01425 Analyte Repeat Status O     (0389)
CWE

Coded with Exceptions

9 03490 Specimen Consumption Quantity O      
CQ

Composite Quantity with Units

10 03493 Pool Size O      
NM

Numeric

11 03494 Auto-Dilution Type O     (0945)
CWE

Coded with Exceptions

18.8.175.1 TCD Field Definitions (13.4.10.0)

18.8.175.2 TCD-1 Universal Service Identifier (CWE) 00238 (13.4.10.1)

Definition: This field identifies the test code that information is being transmitted about. Refer to Table 0789 - Universal Service Identifier in Chapter 2C for valid values.

18.8.175.3 TCD-2 Auto-Dilution Factor (SN) 01420 (13.4.10.2)

Definition: This field is the value that is to be used as the factor for automatically diluting a particular specimen by an instrument for this particular test code. (See examples in definition of 13.4.3.29, "SAC-29 Dilution Factor (SN) 01356," in the "Specimen Container Detail Segment.")

18.8.175.4 TCD-3 Rerun Dilution Factor (SN) 01421 (13.4.10.3)

Definition: This field is the value that is to be used as the factor for automatically diluting a particular specimen in case of rerun for this particular test code.

18.8.175.5 TCD-4 Pre-Dilution Factor (SN) 01422 (13.4.10.4)

Definition: This field is the value that is to be used as the factor for a particular specimen that is delivered to the automated system as pre-diluted for this particular test code.

18.8.175.6 TCD-5 Endogenous Content of Pre-Dilution Diluent (SN) 01413 (13.4.10.5)

Definition: This field represents the rest concentration of the measured test in the diluent. It is the value that is to be used for calculation of the concentration of pre-diluted specimens for this particular test code.

18.8.175.7 TCD-6 Automatic Repeat Allowed (ID) 01416 (13.4.10.6)

Definition: This field identifies whether or not automatic repeats are to be initiated for this particular specimen for this particular test code. Refer to HL7 Table 0136 -Yes/no Indicator for valid values.

18.8.175.8 TCD-7 Reflex Allowed (ID) 01424 (13.4.10.7)

Definition: This field identifies whether or not automatic or manual reflex testing is to be initiated for this particular specimen. Refer to HL7 Table 0136 -Yes/no Indicator for valid values.

18.8.175.9 TCD-8 Analyte Repeat Status (CWE) 01425 (13.4.10.8)

Definition: This field identifies the repeat status for the analyte/result (e.g., original, rerun, repeat, reflex). Refer to HL7 Table 0389 - Analyte Repeat Status in Chapter 2C, Code Tables, for valid values.

For purpose of this chapter we assume the following:

18.8.175.10 TCD-9 Specimen Consumption Quantity (CQ) 03490 (13.4.10.9)

Definition: The specimen consumption quantity determines how much of the specimen shall be consumed in each run of the test. For some types of equipment, observation accuracy depends on this parameter.

18.8.175.11 TCD-10 Pool Size (NM) 03493 (13.4.10.10)

Definition: In order submission messages, this field defines the maximal size of the pool where the given specimen may be combined into. In result submission messages, this field defines the actual size of such pool.

18.8.175.12 TCD-11 Auto-Dilution Type (CWE) 03494 (13.4.10.11)

Definition: This field contains a vendor-defined code of the auto-dilution factor pre-configured on the instrument, which can be used instead of TCD-2 “Auto-Dilution Factor”. Refer to User-defined Table 0945- Auto Dilution Type in Chapter 2C, Code Tables, for suggested values.

If both TCD-2 “Auto-Dilution Factor” and TCD-11 “Auto-Dilution Type” are populated, they shall not contradict each other.