General Electric MAC 5000 XML TECHNICAL REFERENCE MANUAL_SM_2015196-110_A MAC 5000 XML Technical Reference Manual 2015196-110 Revision A

MAC® 5000 XML

Technical Reference Manual

2015196-110 Revision A

MAC is a trademark owned by GE Medical Systems Information Technologies, a division of Ge neral El ectric
Corporation. All other marks are not owned by GE and are instead owned by their respective owners.

© 2003 General Electric Company. All rights reserved.

T-2 MAC 5000 System Revision A

2015196-110 15 October 2003

Contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Manual Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Manual Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Responsibility of the Manufacturer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Service Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5

2 Overview and Requirements . . . . . . . . . . . . . . . . . . . . . . 2-1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

Data Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Appendix A Appendix A: Section and Element Definitions . . . . . . . . .A-1

GE Data Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Table Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-3

Patient Demographics Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Test Demographics Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-5

Diagnosis Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-6

Diagnosis Statement Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-7

Waveforms Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-7

Lead Data Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-8

Extra Questions Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-9

Resting ECG Measurements Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-10

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1 Introduction

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Manual Informatio n

Revision History

Each page of this document has the document part number and revision
letter at the bottom of the page. The revision letter identifies the
document’s update level.

The revision history of this document is summarized in the table below.

Manual Purpose

Introduction: Manual Information

Table 1. Revision History, PN 2015196-110

Revision Date Comments

A 15 October 2003 Initial release of document.

This document assumes a working knowledge of XML. It is not intended
as a guide to XML nor its terminology. The user is encouraged to take
advantage of the abundance of information about XML, including the
XML data specification, available on the Internet.

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Introduction: Safety Information

Safety Information

Responsibility of the Manuf acturer

GE Medical Systems Information Technologies is responsible for the
effects of safety, reliability, and performance only if the equipment is
used in accordance with the instructions for use.

General

Please refer to the documentation delivered with your MAC 5000 resting
ECG analysis system for safety and warning information.

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Service Information

Service Requirements

Refer equipment servicing to GE Medical Systems Information
Technologies authorized service personnel only. Any unauthorized

attempt to repair equipment under warranty voi ds that warranty.
It is the user’s responsibility to report the need for service to GE Medical

Systems Information Technologies or to one of their authorized agents .
Failure on the part of the responsible individual, hospital, or institution

using this equipment to implement a satisfactory maintenance schedule
may cause undue equipment failure and possible health hazards.

Regular maintenance, irrespective of usage, is essential to ensure that
the equipment will always be functional when required.

Introduction: Service Information

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Introduction: Service Information

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2 Overview and

Requirements

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Introduction

Overview

Overview and Requirements: Introduction

The MAC 5000 resting ECG analysis system (software version 8A and
higher) allows you to save and export resting ECGs in XML format to a
PC for storage and analysis.

127(

Data not entered or calculated at the MAC 5000 will not appear in
the XML file.

There are two ways this can be accomplished.

1. The MAC 5000 can be set up to save every ECG in the XML file
format. XML data can be transferred to another PC from the MAC
5000 data disk. XML files are stored to the following path:
a:\XML\*.XML. Except for the XML s uffix, the name of th e XML file
is the same as the name of the ECG file on the data disk.

2. The MAC 5000 can transmit ECGs to the serial port in XML format.
The serial port of the MAC 5000 must be connected to the serial port
of a PC running a terminal emulation program (i.e. HyperTerminal).

Technology

The conversion of data to XML (Extensible Markup Language) is based
upon a fixed set of data tags. The data tags are contained in XML
Document Type Definition (DTD) files defined by GE Medical Syste ms
Information Technologies. Each specific test type has its own DTD file.

This manual a ssum es a wor kin g knowl edg e of XML. It is not inten ded a s
a guide to XML nor its terminology. The user is encouraged to take
advantage of the abundance of information about XML and the XML
data specification available on the Internet.

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Overview and Requirements: Data Types

Data Types

Table 2. Data Types

Data Type Description

Date Date data types contain the day, month and year. The date must be formatted as either MM/DD/YYYY

or MM-DD-YYYY. Where:

MM = Month 1-12
DD = Day = 1-31
YYYY = Four digit year value

Time Time data types contain the hour, minutes, seconds and milliseconds. The time must be formatted as

HH:MM:SS:NN. Where:

HH = Hour = 0-23
MM = Minute = 0-59
SS = Second = 0-59
NN = Hundredths = 0-99 (optional)

Predefined Values There are many elements with predefined values. The Gender element, for example, is one of these

Predefined Values. If your XML document contains the Gender element, then the data must be one of
the following, predefined options for this data.



Male



Female

These Predefined Values and their acceptable options are specified in the tables in “Appendix A,
Section and Element Definitions”.

Diagnosis Statements: The Diagnosis Statement data type contains the textual interpretation, impressions, or conclusions

regarding a particular test. No statement or sentence of the diagnosis, referred to as the Statement
Text (StmtText), can exceed 127 characters. In addition to the Statement Text, one or more Statement
Flags can be included for each Statement Text. The Statement Flag is used to indicate one or more of
the following conditions about the statement itself:
EndsLine - Statement ends the interpretative line
Deleted - Statement has been deleted from interpretation
UserInsert - Statement was added to the interpretation by the user

The following is an example of a Diagnosis Statement:
<DiagnosisStatement>
<StmtFlag>EndsLine</StmtFlag>
<StmtFlag>UserInsert</StmtFlag>
<StmtText>Abnormal ECG</StmtText>

</DiagnosisStatement>
User ID A unique numeric number assigned to every person.
Numeric A number within the element’s specified range.
Alphanumeric An element’s value containing a combination of numbers and/or letters.
8 Bit Unsigned 8 Bit Unsigned data types range from 0 to 253.
8 Bit Signed 8 Bit Signed data types range from –125 to +125. If the sign is not explicitly defined it is assumed to be

a positive value.
16 Bit Unsigned 16 Bit Unsigned data types range from 0 to 65533.

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Overview and Requirements: Data Types

Table 2. Data Types (Continued)

Data Type Description

16 Bit Signed 16 Bit Signed data types range from –32765 to +32765. If the sign is not explicitly defined it is assumed

to be a positive value.
32 Bit Unsigned 32 Bit Unsigned data types range from 0 to 4,294,967,293.
32 Bit Signed 32 Bit Signed data types range from –2,147,483,645 to +2,147,483,645.
Float Float data types are not to exceed three decimal points. Exponential notation is not supported.

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Overview and Requirements: Data Types

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A Appendix A: Section and

Element Definitions

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Section and Element Definitions: GE Data Sections

GE Data Sections

Table Explanation

GE has defined data sections, each containing a uniq ue combination of
data fields. The sections are:



Patient Demographics,



Test Demographics,



Extra Questions



Diagnosis (text only),



Wave forms (only acquired leads, not derived leads), and



Resting ECG Measurements

Each of the sections are depi cted in one of the tables prov ided on the nex t
several pages. The “Description” column of each table identifies the
elements that comprise that particular section. Each of these elements
should occur only once unless otherwise noted.

In addition to identifying the elements, each table also p rovides the
following information.

Table 1. Explanation of Table Columns

Column Description

XML Tag Indicates the GE XML tag that is used for the specified element.
Length Identifies the maximum field text length allowed for each data element.
Type Specifies the type of data being passed for a particular element. The information in this field may be further

clarified by information in the Value/Range column.

Value/Range Provides additional detail or specifies the limits for the element’s content. In the case of Predefined Values,

the acceptable values for the element are listed in this column.

Description Provides a description for every element in the associated section of data.

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Section and Element Definitions: GE Data Sections

Patient Demographics Section

The Patient Demographics section contains information about the patient.

Table 2. Patient Demographics: <PatientDemographics>

XML Tag Length Type Value/Range Description

PatientID 16 Alphanumeric Required - No Truncation Must Match

MUSE ID scheme

PatientAge Numeric 0 - 150 Patient age
AgeUnits See Value/ Range YEARS , MONTHS, WEEKS, DAYS,

HOURS

DateofBirth 10 DATE MM/DD/YYYY or

MM-DD-YYYY
Gender See Value/ Range MALE, FEMALE Patient’s gender
Race See Value/ Range CAUCASIAN, BLACK, ORIENTAL,

HISPANIC, INDIAN, ESKIMO,

HAWAIIAN, PACIFIC ISLANDER,

MONGOLIAN, ASIAN, UNKNOWN
HeightIN Numeric 0-255 Patient’s height in inches
HeightCM Numeric 0-255 Patient’s height in centimeters
WeightLBS Numeric 0-2048 Patient’s weight in pounds
WeighKG Numeric 0-2048 Patient’s weight in kilograms
PatientLastName 16 Alphanumeric Patient’s last name

Patient’s ID - This ID must be assigned
for the life of the patient and must be
unique for this patient.

Age Units

Patient’s date of birth

Patient’s race

PatientFirstName 10 Alphanumeric Patient’s first name
AnalysisAge 16 Bit Unsigned Patient age used to run analysis

program

AnalysisAgeUnits See Value/ Range YEARS, MONTHS, WEEKS, DAYS,

HOURS

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Analysis age units

Section and Element Definitions: GE Data Sections

Test Demographics Section

The Test Demographics section contains information about the particular test. The type of test performed,
and the date and time of the test are some of the elements of this section.

Table 3. Test Demographics: <TestDemographics>

XML Tag Length Type Value/Range Description

DataType See Value/Range RESTING, STRESS, HOLTER,

CATH, ECHO,

Site Numeric 1-32 MUSE site number - associated to

AcquisitionDevice 5 Alphanumeric Name or Acroynm for the device test

Status See Value/Range CONFIRMED,

UNCONFIRMED
Priority See Value/Range NORMAL, PREOP, STAT Priority of test
Location Numeric 0 - 599 Location number corresponding to

RoomID 5 Alphanumeric Patient’s room number
AcquisitionTime 11 TIME HH:MM:SS:NN Time test was performed.
AcquisitionDate 10 DATE MM/DD/YYYY or

MM-DD-YYYY
CartNumber Numeric Number corresponding to a device.
AcquisitionSoftwareVersion 9 Alphanumeric Version of software used to acquire

Identifies the specific type of test

Hospital Name

was performed on.
Status of test. Must be either

CONFIRMED or UNCONFIRMED.

MUSE list of locations.

Date test was performed.

test.
TestType 24 Alphanumeric Description of test
TestReason 32 Alphanumeric Reason for test
OrderingMDLastName 16 Alphanumeric Ordering MD last name
OrderingMDFirstName 10 Alphanumeric Ordering MD first name
ReferringMDID UserID 1-10000 MUSE referring MD Muse ID number
ReferringMDLastName 16 Alphanumeric Referring MD last name
ReferringMDFirstName 10 Alphanumeric Referring MD first name
OverreaderID UserID 1-10000 MUSE interpreting MD ID number
OverreaderLastName 16 Alphanumeric Interpreting MD last name
OverreaderFirstName 10 Alphanumeric Interpreting MD first name
FellowID UserID 1-10000 MUSE fellow ID number
FellowLastName 16 Alphanumeric Fellow last name

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Table 3. Test Demographics: <TestDemographics> (Continued)

XML Tag Length Type Value/Range Description

FellowFirstName 10 Alphanumeric Fellow first name
AcquisitionTechID UserID 1-10000 Technician performing test MUSE ID

number
AcquisitionTechLastName 16 Alphanumeric Performing technician last name
AcquisitionTechFirstName 10 Alphanumeric Performing technician first name
EditorID User ID 1-10000 MUSE transcriptionist ID
EditorLastName 16 Alphanumeric Transciptionist last name
EditorFirstName 10 Alphanumeric Transciptionist first name
SecondaryID 16 Alphanumeric Patient’s secondary ID
XMLSourceVersion 127 Alphanumeric Vendor version of software used to

create XML Document

Diagnosis Section

This section contains the physician’s textual comments and interpretation of the test.

Table 4. Diagnosis: <Diagnosis>

XML Tag Length Type Value/Range Description

Modality See Value/Range RESTING, STRESS, HOLTER,

CATH, ECHO

StatementCount Numeric 0-254 Total number of diagnosis

LabelText 32 Alphanumeric String describing diagnosis
DiagnosisStatement Variable See Diagnosis Statement All diagnosis statememts

Type of test that this diagnosis
corresponds to.

statements

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Section and Element Definitions: GE Data Sections

Diagnosis Statement Section

Table 5. Diagnosis Statement: <DiagnosisStatement>

XML Tag Length Type Value/Range Description

StmtFlg See Value/Range ENDSLINE, DELETED,

USERINSERT

StmtText 127(each) Alphanumeric

Indicates if statement is Deleted, User
Defined or is the End of the Line.

Waveforms Section

Table 6. Waveforms: <Waveform>

XML Tag Length Type Value/Range Description

WaveformType See Value/Range MEDIAN, RANGE Median or Rhythm waveforms
WaveformStartTime Numeric 32 Bit Unsigned Offset in buffer to beginning of

waveform

NumberofLeads Numeric 8 or 11 Total number of leads in the

waveform

SampleType See Value/Range DISCRETE_SAMPLES,

CONTINUOUS_SAMPLES,

MULTIPLEX_SAMPLES,

SIMPLEX_SAMPLES

One of the four types of samples
listed in the Comments section.

SampleBase Numeric 16 Bit Unsi gned Sample Rate Base
SampleExponent Numeric 8 Bit Unsigned Exponent value used in conjunction

with the Sample Base value

HighPassFilter Numeric 16 Bit Unsigned High pass filter applied to data

before it was received by MUSE. In
hundredths of Hertz.

LowPassFilter Numeric 16 Bit Unsi gned Low pass filter applied to data

before it was received by MUSE. In
Hertz, usually 150.

ACFilter See Value/Range NONE, 50 , 60 AC filter applied to data before it

was received by MUSE. In Hertz.

LeadData Variable See Lead Data Structure See Lead Structure

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Section and Element Definitions: GE Data Sections

Lead Data Section

Table 7. Lead Data: <LeadData>

XML Tag Length Type Value/Range Description

LeadByteCountTotal Numeric 16 Bit Unsigned Total uncompressed lead buffer size in bytes
LeadTimeOffset Numeric 16 Bit Unsigned Offset of lead in reference to the waveform.

(In milliseconds)
LeadSampleCountTotal Numeric 16 Bit Unsigned Total number of samples in the lead buffer
LeadAmplitudeUnitsPerBit nnn.nnn Numeric Float A/D scaling factor. For ECG, this value is the

number of volts per A/D bit.
LeadAmplitudeUnits See Value/Range VOLTS, MILLIVOLTS,

MICROVOLTS

LeadHighLimit Numeric 32 Bit Unsigned High limit value for a single lead

LeadLowLimit Numeric 32 Bit Unsigned Low limit value for a single lead

LeadID See Value/Range I,II, V1,V2,V3,

V4,V5,V6

VCG - add X,Y, Z

Ped - add

V3R,V4R,V7

LeadOffsetFirstSample Numeric 16 Bit Unsigned Offset within lead buffer of first valid lead data.

FirstSampleBaseline Numeric 32 Bit Unsigned Value indicating amount of baseline shift
LeadSampleSize Numeric 8 Bit Unsigned Size of individual data sample. (In bytes)
LeadOff BOOL TRUE, FALSE Boolean value indicating that the Lead is off
BaselineSway BOOL TRUE, FALSE Boolean value indicating that baseline sway is

ExcessiveACNoise BOOL TRUE, FALSE Boolean value indicating that excessive AC

A/D scaling factor units. For ECG, this is

usually microvolts.

measurement.

measurement.

Specific lead Identifier See comments.

(In samples)

present in the data.

noise is present in data
MuscleNoise BOOL TRUE, FALSE Boolean value indicating the muscle noise is

present in the data.
LeadDataCRC32 Numeric 32 Bit Unsigned 32 bit CRC of unencoded and uncompressed

raw signal data for the current lead
WaveFormData Variable Base64 Encoded Data Base64 encoded uncompressed raw signal

data for the current lead. Each data sample

must be in low byte high byte format. (Little

endian format)

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Section and Element Definitions: GE Data Sections

Extra Questions Section

Table 8. Extra Questions <ExtraQuestions>

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ExtraQuestion Variable See Extra Question

Structure

Table 9. Extra Question <ExtraQuestion>

;0/7DJ /HQJWK 7\SH 9DOXH5DQJH 'HVFULSWLRQ

Question 10 Alphanumeric Generic question prompt.
Answer 17 Alphanumeric This can be an

alphanumeric,

numeric (32 bit

unsigned), or “Yes”,

“No”, or “Unknown”

Repeating section. See Extra
Question Structure

Answer to the question.

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Section and Element Definitions: GE Data Sections

Resting ECG Measurements Section

Table 10. Resting ECG Measurements <RestingECGMeasurements>

XML Tag Length Type Value/Range Description

SystolicBP Numeric 0-999 Systolic blood pressure mmHg
DiastolicBP Numeric 0-999 Diastolic blood pressure mmHg
VentricularRate Numeric 0-999 Ventricular rate in BPM
AtrialRate Numeric 0-999 Atrial rate in BPM
PRInterval Numeric 0-999 P-R interval in msec
QRSDuration Numeric 0-999 QRS duration in msec
QTInterval Numeric 0-999 QT interval in msec
PAxis Numeric -179 to 180 P axis
RAxis Numeric -179 to 180 R axis
TAxis Numeric -179 to 180 T axis
QRSCount Numeric 0-254 QRS count
QTCorrected Numeric 0-999 Corrected QT Interval in msec
QOnset Numeric 16 Bit Unsigned Q onset. (In samples)
QOffset Numeric 16 Bit Unsigned Q offset (In samples)
POnset Numeric 16 Bit Unsigned P onset (In samples)
POffset Numeric 16 Bit Unsigned P offset (In samples)
TOffset Numeric 16 Bit Unsigned T offset (In samples)
ECGSampleBase Numeric -127 to 126 ECG sample rate base
ECGSampleExponent Numeric 8 Bit Signed ECG sample rate base exponent

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