A.34.6 Hemodynamic Information Object Definition

A.34.6.1 Hemodynamic IOD Description

The Hemodynamic IOD is the specification of digitized pressure, electrical, and other signals from the patient circulatory system, which has been acquired by a hemodynamic modality.

Note: The duration of acquisition represented in one SOP Instance is not specifically constrained, and is limited only by the maximum size of the Waveform Data attribute.

A.34.6.2 Hemodynamic IOD Entity-Relationship Model

The E-R Model in Section A.34.1 of this Part applies to the Hemodynamic IOD.

A.34.6.3 Hemodynamic IOD Module Table

Table A.34.6-1Hemodynamic IOD Modules

IE Module Reference Usage
Patient Patient C.7.1.1 M
Clinical Trial Subject C.7.1.3 U
Study General Study C.7.2.1 M
Patient Study C.7.2.2 U
Clinical Trial Study C.7.2.3 U
Series General Series C.7.3.1 M
Clinical Trial Series C.7.3.2 U
Frame of Reference Synchronization C.7.4.2 C - Required if Waveform Originality (003A,0004) is ORIGINAL; may be present otherwise
Equipment General Equipment C.7.5.1 M
Waveform Waveform Identification C.10.8 M
Waveform C.10.9 M
Acquisition Context C.7.6.14 M
Waveform Annotation C.10.10 C - required if annotation is present
SOP Common C.12.1 M

A.34.6.4 Hemodynamic IOD Content Constraints

A. Modality

The value of Modality (0008,0060) shall be HD.

A. Acquisition Context Module

The Defined Template for Acquisition Context Sequence (0040,0555) is TID 3403.

A. Waveform Sequence

The number of Waveform Sequence (5400,0100) Items shall be between 1 and 4, inclusive.

A. Number of Waveform Channels

The value of the Number of Waveform Channels (003A,0005) in each Waveform Sequence Item shall be between 1 and 8, inclusive.

A. Sampling Frequency

The value of the Sampling Frequency (003A,001A) in each Waveform Sequence Item shall be less than or equal to 400.

A. Channel Source

The Defined Context ID for the Channel Source Sequence (003A,0208) in each Channel Definition Sequence Item shall be CID 3003, CID 3001 for surface ECG channels, or CID 3090 for time synchronization channels. The Channel Source Code Value shall encode at minimum the metric (measured physical quality) and function (measurement or stimulus); unless otherwise specifically encoded, the default function shall be “measurement”.

The Channel Source Modifiers Sequence (003A,0209) in each Channel Definition Sequence Item shall be used to specify additional qualifiers of the semantics of the waveform source, including technique and anatomic location, if not encoded by the Channel Source Code Value. Technique, with terms from Defined Context ID 3241, shall be specified in Channel Source Modifiers Sequence Items prior to the cardiac anatomic location(s), with terms from Defined Context ID 3010, 3014, and 3019. If technique is pullback, the sequence of anatomic locations shall be specified in ordered Channel Source Modifiers Sequence Items (e.g., initial, transitional, and final locations).

Note: Terms from other Context Groups may also be used for extended specification of the Channel Source, as declared in the Conformance Statement for an application (see PS3.2).

A. Waveform Sample Interpretation

The value of the Waveform Sample Interpretation (5400,1006) in each Waveform Sequence Item shall be SS.

A. Waveform Annotation Module

The Defined Context ID for the Concept Name Code Sequence (0040,A043) in the Waveform Annotation Sequence (0040,B020) shall be CID 3337.