ISO 22894:2020

INTERNATIONAL ISO
STANDARD 22894
First edition
2020-03
Traditional Chinese medicine — Pulse
waveform format
Médecine traditionnelle chinoise — Format de la forme d'onde de pouls
Reference number
ISO 22894:2020(E)
©
ISO 2020

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ISO 22894:2020(E)

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© ISO 2020
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ISO 22894:2020(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Encoding format . 3
4.1 Primary description. 3
4.1.1 General. 3
4.1.2 Sampling attributes . 3
4.1.3 Frame attributes . 4
4.1.4 Waveform . 5
4.1.5 Channel . 7
4.2 Auxiliary rule . 8
4.2.1 MWF_WAV (1Eh): waveform data . 8
4.2.2 MWF_FLT (11h): filter information . 8
4.2.3 MWF_END (80h): end of description . 9
4.2.4 MWF_TXC (03h): character code . 9
5 Supplemental information . 9
5.1 MWF_TIM (85h): measurement date/time . 9
5.2 Information description .10
5.2.1 MWF_NTE (16h): comment .10
5.2.2 MWF_PRE (40h): preamble .10
5.2.3 MWF_MAN (17h): manufacturer information of medical device .10
5.2.4 MWF_UID (87h): unique identifier .11
5.3 Patient information .11
5.3.1 General.11
5.3.2 MWF_PNM (81h): patient name .11
5.3.3 MWF_PID (82h): patient ID .12
5.3.4 MWF_AGE (83h): patient date of birth .12
5.3.5 MWF_SEX (84h): gender .12
Annex A (Informative) Example of pulse condition waveform encoding rule .13
Bibliography .14
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ISO 22894:2020(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
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described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
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This document was prepared by Technical Committee ISO/TC 249, Traditional Chinese medicine.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
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INTERNATIONAL STANDARD ISO 22894:2020(E)
Traditional Chinese medicine — Pulse waveform format
1 Scope
This document specifies the application, in the context of traditional Chinese medicine practice,
of medical waveform format encoding rules (MFER) to pulse condition waveform as measured in
physiological laboratories, hospitals, bed-wards, pharmacies, clinics, community health centres and
home care check-ups using pulse condition devices.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 19614, Traditional Chinese medicine — Pulse graph force transducer
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 19614 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
pulse-taking location
place on the radial artery where the pulse condition is measured
Note 1 to entry: According to traditional Chinese medicine theory, there are three such places (cun/inch, guan/
bar and chi/cubit) all over the radial artery, see Figure 1.
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ISO 22894:2020(E)

Key
1 left hand
2 right hand
3 cun/inch
4 guan/bar
5 chi/cubit
Figure 1 — Pulse-taking location
3.2
channel
individual waveform data group from the pulse graph force transducer (3.3)
3.3
pulse graph force transducer
device that can detect pulsation of the radial artery and its peripheral tissues as a mechanical quantity
and convert it into an electrical signal output according to a certain pattern for the purpose of
traditional Chinese medicine pulse condition acquisition
Note 1 to entry: Transducers involved in this document only refer to pressure or force transducers.
[SOURCE: ISO 19614:2017, 3.1]
3.4
one signal transducer
pulse graph force transducer (3.3) with only one channel (see Figure 2)
Key
1 signal transducer with auxiliary plan
2 signal transducer without auxiliary plan
Figure 2 — One signal transducer
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ISO 22894:2020(E)

3.5
array signal transducer
pulse graph force transducer (3.3) with multi-channel (see Figure 3)
Note 1 to entry: Array signal transducer can be further divided into line array transducer and cross array
transducer.
Note 2 to entry: Line array transducer can be further divided into horizontal parallelism line array transducer
and vertical parallelism line array transducer.
Key
1 array signal transducer with auxiliary plan
2 array signal transducer without auxiliary plan
Figure 3 — Array signal transducer
4 Encoding format
4.1 Primary description
4.1.1 General
This document provides encoding rules for pulse waveform. In addition, together with encoding of
information of recognition for waveform, measurement information and interpretation information is
provided, but these are all optional functions and are dependent on each implementation concept.
NOTE Interpretation code or measurement value might be described by other standards such as
HL7 or XML.
All the symbols and their tags used in this document are specified in ISO 22077-1.
4.1.2 Sampling attributes
4.1.2.1 General
Sampling attributes, including sampling rate and resolution, are given in Tables 1 to 4. An example of
the encoded data and its explanation can be found in Annex A, Table A.1.
4.1.2.2 MWF_IVL (0Bh): Sampling rate
This tag indicates the frequency or sampling interval for the medical waveform sampled (see Table 1).
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ISO 22894:2020(E)

Table 1 — Sampling rate
Symbol Tag Length Value
Bytes
MWF_IVL 11d/0Bh ≤ 6 Unit (1)
Exponent (1)
Mantissa (≤4)
The units may be frequency in hertz or time in seconds (see Table 2).
Table 2 — Sampling rate unit
Unit Code
Frequency Hz 0d
Time interval s 1d
^−3
EXAMPLE If the code is 0B 04 01 FD 00 01, that means the sampling rate is equal to 1*10 and the units
are 1 ms.
4.1.2.3 MWF_SEN (0Ch): Sampling resolution
This tag indicates the resolution, minimum bits, for the medical waveform sampled (see Table 3).
Table 3 — Sampling resolution
Symbol Tag Length Value
Bytes
MWF_SEN 12d/0Ch ≤ 6 Unit (1)
Exponent (1)
Mantissa (≤4)
The units should be force in newtons, mass in kilograms, pressure in Pascals and voltage in volts (see
Table 4).
Table 4 — Sampling resolution units
Unit Code Default
Voltage V 0d None
Force N 6d None
Pressure Pa 2d None
Mass kg 16d None
4.1.3 Frame attributes
4.1.3.1 Gener
...