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CSU - channel sensitivity and units

Attention: Retained for backward compatibility only in version 2.7. This is used only in the CD Channel Definition data type, which has been retained for backward compatibility only in version 2.7.

As of v2.7 a third tuple, formerly known as triplet, has been added to the CSU data type. Additionally, 3 new components were added to each tuple such that each tuple now has a total of 7 components. The Original Text component applies to the CSU as a whole.

HL7 Component Table - CSU - channel sensitivity and units
Seq# Description Data Type Usage Vocabulary Length C.LEN Flags
CSU
1 Channel Sensitivity NM R
   
2 Unit of Measure Identifier ST C
 20
3 Unit of Measure Description ST C
199
4 Unit of Measure Coding System ID C
0396(R) Coding System(Required)
[1..12]    
5 Alternate Unit of Measure Identifier ST O
 20
6 Alternate Unit of Measure Description ST O
199
7 Alternate Unit of Measure Coding System ID C
0396(R) Coding System(Required)
[1..12]    
8 Unit of Measure Coding System Version ID ST C
 10
9 Alternate Unit of Measure Coding System Version ID ST O
 10
10 Original Text ST O
[199..] 199
11 Second Alternate Unit of Measure Identifier ST O
 20
12 Second Alternate Unit of Measure Text ST O
199
13 Name of Second Alternate Unit of Measure Coding System ID O
0396(R) Coding System(Required)
[1..12]    
14 Second Alternate Unit of Measure Coding System Version ID ST C
 10
15 Unit of Measure Coding System OID ST C
199
16 Unit of Measure Value Set OID ST O
199
17 Unit of Measure Value Set Version ID DTM C
  8
18 Alternate Unit of Measure Coding System OID ST C
199
19 Alternate Unit of Measure Value Set OID ST O
199
20 Alternate Unit of Measure Value Set Version ID DTM C
  8
21 Alternate Unit of Measure Coding System OID ST C
199
22 Alternate Unit of Measure Value Set OID ST O
199
23 Alternate Unit of Measure Value Set Version ID ST C
  8

Components: <Channel Sensitivity (NM)> & <Unit of Measure Identifier (ST)> & <Unit of Measure Description (ST)> & <Unit of Measure Coding System (ID)> & <Alternate Unit of Measure Identifier (ST)> & <Alternate Unit of Measure Description (ST)> & <Alternate Unit of Measure Coding System (ID)> & <Unit of Measure Coding System Version ID (ST)> & <Alternate Unit of Measure Coding System Version ID (ST)> & <Original Text (ST)> & <Second Alternate Unit of Measure Identifier (ST)> & <Second Alternate Unit of Measure Text (ST)> & <Name of Second Alternate Unit of Measure Coding System (ID)> & <Second Alternate Unit of Measure Coding System Version ID (ST)> & <Unit of Measure Coding System OID (ST)> & <Unit of Measure Value Set OID (ST)> & <Unit of Measure Value Set Version ID (DTM)> & <Alternate Unit of Measure Coding System OID (ST)> & <Alternate Unit of Measure Value Set OID (ST)> & <Alternate Unit of Measure Value Set Version ID (DTM)> & <Alternate Unit of Measure Coding System OID (ST)> & <Alternate Unit of Measure Value Set OID (ST)> & <Alternate Unit of Measure Value Set Version ID (ST)>


CSU-1: Channel Sensitivity (NM)

Definition: This component transmits the nominal value that corresponds to one unit in the waveform data, that is, the effective resolution of the least significant bit of the ADC, and the polarity of the channel.

CSU-2: Unit of Measure Identifier (ST)

Definition: The unit designation for the channel sensitivity. This field is required if the unit of measure description is not present.

CSU-3: Unit of Measure Description (ST)

Definition: The full text name of the unit of measure identifier. This field is required if the unit of measure identifier is not present.

CSU-4: Unit of Measure Coding System (ID)

Definition: Specifies the designated system of units. Refer to HL7 Table 0396 – Coding System in Chapter 2C, Code Tables, for valid values. This component is required if the CSU.2 Unit of Measure Identifier is present.

Both CSU.4 and CSU.15 may be populated. Receivers should not identify a code based on its position within the tuples (Identifier, Alternate Identifier, or Second Alternate Identifier) or position within a repeating field. Instead, the receiver should always examine the codingSystem as specified in CSU.4 and/or CSU.15, the "Coding System" component or the "Coding System OID" for the tuple.

CSU-5: Alternate Unit of Measure Identifier (ST)

Definition: A sequence of characters that uniquely identifies an alternate units designation for the channel sensitivity. Analogous to CSU.2 Unit of Measure Identifier.

Usage Notes: The Alternate Identifier is used to represent the local or user seen code as described. If present, it obeys the same rules of use and interpretation as described for component 1. If both are present, the identifiers in component 4 and component 1 should have exactly the same meaning, i.e., they should be exact synonyms.

CSU-6: Alternate Unit of Measure Description (ST)

Definition: The full text name of the alternate unit of measure identifier. Analogous to CSU.3 Unit of Measure Description.

CSU-7: Alternate Unit of Measure Coding System (ID)

Definition: Specifies the coding system for the alternate unit of measure. Refer to HL7 Table 0396 – Coding System in Chapter 2C, section "Coding System Table" for valid values. Analogous to CSU.4 Unit of Measure Coding System.

This field is required if the CSU.5 Alternate Unit of Measure Identifier is present. Both CSU.7 and CSU.18 may be populated. Receivers should not identify a code based on its position within the tuples (Identifier, Alternate Identifier, or Second Alternate Identifier) or position within a repeating field. Instead, the receiver should always examine the codingSystem as specified in CSU.7 and/or CSU.18, the "Coding System" component or the "Coding System OID" for the tuple.

CSU-8: Unit of Measure Coding System Version ID (ST)

Definition: This component carries the version for the coding system identified by components 2-4. If CSU.4 is populated with a value other than HL7nnnn or is of table type user-defined, version ID must be valued with an actual version ID. If CSU.4 is populated with a value of HL7nnnn and nnnn is of table type HL7, version ID may have an actual value or it may be absent. If version ID is absent, it will be interpreted to have the same value as the HL7 version number in the message header.

CSU-9: Alternate Unit of Measure Coding System Version ID (ST)

Definition: This component carries the version for the coding system identified by components 5-7. Analogous to CSU.8 Unit of Measure Coding System Version ID.

CSU-10: Original Text (ST)

Definition: The text as seen and/or selected by the user who entered the data. Original text can be used in a structured user interface to capture what the user saw as a representation of the code on the data input screen, or in a situation where the user dictates or directly enters text, it is the text entered or uttered by the user. In a situation where the code is assigned sometime after the text was entered, original text is the text or phrase used as the basis for assigning the code.

CSU-11: Second Alternate Unit of Measure Identifier (ST)

Definition: A sequence of characters that uniquely identifies a second alternate units designation for the channel sensitivity. Analogous to CSU.2 Unit of Measure Identifier.

CSU-12: Second Alternate Unit of Measure Text (ST)

Definition: The descriptive or textual name of the second alternate identifier. Analogous to CSU.3 Unit of Measure Description.

CSU-13: Name of Second Alternate Unit of Measure Coding System (ID)

Definition: Specifies the coding system for the second alternate unit of measure. Analogous to CSU.4 Unit of Measure Coding System. Refer to HL7 Table 0396 – Coding System in Chapter 2C, Code Tables, for valid values.

This component is required when CSU.11 is populated. Both CSU.13 and CSU.21 may be populated. Receivers should not identify a code based on its position within the tuples (Identifier, Alternate Identifier, or Second Alternate Identifier) or position within a repeating field. Instead, the receiver should always examine the codingSystem as specified in CSU.13 and/or CSU.21 the Coding System component or the Coding System OID for the tuple.

CSU-14: Second Alternate Unit of Measure Coding System Version ID (ST)

Definition: This component carries the version for the coding system identified by components 11-13. Analogous to CSU.8 Unit of Measure Coding System Version ID.

CSU-15: Unit of Measure Coding System OID (ST)

Definition: This component contains the ISO Object Identifier (OID) for the coding system or value set named in CSU.4. The value for this component is 2.16.840.1.113883.12.#### where "####" is to be replaced by the HL7 table number in the case of an HL7 defined or user defined table. For externally defined code systems the OID registered in the HL7 OID registry SHALL be used.

This component is required when CSU.2 is populated and CSU.4 is not populated. Both CSU.4 and CSU.15 may be populated.

CSU-16: Unit of Measure Value Set OID (ST)

Definition: This component contains the ISO Object Identifier (OID) to allow identification of the value set from which the value in CSU.2 is obtained. The value for this component is 2.16.840.1.113883.12.#### where "####" is to be replaced by the HL7 table number in the case of an HL7 defined or user defined table. For externally defined value sets, the OID registered in the HL7 OID registry SHALL be used.

Note: If a code is provided, the meaning of the code must come from the definition of the code in the code system. The meaning of the code SHALL NOT depend on the value set. Applications SHALL NOT be required to interpret the code in light of the valueSet, and they SHALL NOT reject an instance because of the presence or absence of any or a particular value set/ value set version ID.


A value set may or need not be present irrespective of other fields.

CSU-17: Unit of Measure Value Set Version ID (DTM)

Definition: This component carries the version for the value set identified by CSU.16. The version is a date. The date is the date/time that the value set being used was published.

Value set version ID is required if CSU.16 is populated.

CSU-18: Alternate Unit of Measure Coding System OID (ST)

Definition: This component contains the ISO Object Identifier (OID) for the coding system or value set named in CSU.7. The value for this component is 2.16.840.1.113883.12.#### where "####" is to be replaced by the HL7 table number in the case of an HL7 defined or user defined table. For externally defined code systems the OID registered in the HL7 OID registry SHALL be used.

This component is required when CSU.5 is populated and CSU.7 is not populated. Both CSU.7 and CSU.18 may be populated.

CSU-19: Alternate Unit of Measure Value Set OID (ST)

Definition: This component contains the ISO Object Identifier (OID) to allow identification of the value set from which the value in CSU.5 is obtained. The value for this component is 2.16.840.1.113883.12.#### where "####" is to be replaced by the HL7 table number in the case of an HL7 defined or user defined table. For externally defined value sets, the OID registered in the HL7 OID registry SHALL be used.

A value set may or need not be present irrespective of other fields. .

Note: If a code is provided, the meaning of the code must come from the definition of the code in the code system. The meaning of the code SHALL NOT depend on the value set. Applications SHALL NOT be required to interpret the code in light of the valueSet, and they SHALL NOT reject an instance because of the presence or absence of any or a particular value set/ value set version ID.


CSU-20: Alternate Unit of Measure Value Set Version ID (DTM)

Definition: This component carries the version for the value set identified by CSU.19. The version is a date. The date is the date/time that the value set being used was published.

Value set version ID is required if CSU.19 is populated.

CSU-21: Alternate Unit of Measure Coding System OID (ST)

Definition: This component contains the ISO Object Identifier (OID) for the coding system or value set named in CSU.13. The value for this component is 2.16.840.1.113883.12.#### where "####" is to be replaced by the HL7 table number in the case of an HL7 defined or user defined table. For externally defined code systems the OID registered in the HL7 OID registry SHALL be used.

This component is required when CSU.11 is populated and CSU.13 is not populated. Both CSU.13 and CSU.21 may be populated.

CSU-22: Alternate Unit of Measure Value Set OID (ST)

Definition: This component contains the ISO Object Identifier (OID) to allow identification of the value set from which the value in CSU.11 is obtained. The value for this component is 2.16.840.1.113883.12.#### where "####" is to be replaced by the HL7 table number in the case of an HL7 defined or user defined table. For externally defined value sets, the OID registered in the HL7 OID registry SHALL be used.

A value set may or need not be present irrespective of other fields.

Note: If a code is provided, the meaning of the code must come from the definition of the code in the code system. The meaning of the code SHALL NOT depend on the value set. Applications SHALL NOT be required to interpret the code in light of the valueSet, and they SHALL NOT reject an instance because of the presence or absence of any or a particular value set/ value set version ID.


CSU-23: Alternate Unit of Measure Value Set Version ID (ST)

Definition: This component carries the version for the value set identified by CSU.22. The version is a date. The date is the date/time that the value set being used was published.

Value set version ID is required if CSU.22 is populated.