GE Medical Systems Information Technologies 07APFH-AP Users Manual
WMTS TRANSCEIVERS
Note: The information in this section is only applicable for Wireless Medical
Telemetry Service (WMTS).
About Transceivers
Wireless Medical Telemetry Services (WMTS) Remote Transceivers provide the link
between the patient and the Central Station through the newly approved 608 - 614
MHz Medical Telemetry frequency band. The ambulatory and bedside device transceivers communicate data to the Central Station through the Access Point transceiver.
In addition, the transceivers are capable of receiving control commands for self-use or
connection transfer.
The PatientNet ambulatory transceiver is the DT-4500. This transceiver is worn by the
patient and usually carried in a gown pocket or pouch, and used with a 3, 4, or 5-wire
leadset connected to the electrodes on the patient. The DT-4500 is IPX7 compliant, so
it can be submerged in 1m of water for up to 30 minutes.
The DT-7000 and DT-7001 are the PatientNet bedside-device transceivers and are
physically connected to bedside monitors (other manufacturers’ bedside monitors and
NPB 7200 series ventilator).
WMTS TRANSCEIVERS
The DR-10000 Access Point transceiver collects data from the ambulatory and bedside transceivers, sends that data to the Central Station, and transmits control data to
the transceiver devices.
WARNING: Remove transceivers from patients before MRI and CAT scan procedures, and
store the transceivers outside the room where such equipment is located.
Close proximity to MRI or CAT scan equipment may result in damage to
transceivers.
Programming Transceivers
Before a transceiver can be used with the PatientNet System, it must first be programmed with a Network Number and Monitor I.D. number to match the corresponding Central Station. Consult your facility’s system administrator to perform these
functions.
WARNING: When programming the DT-4500 through the External Serial Device (I/O) con-
nector, it must be disconnected from the patient. The accessory connector
shall be kept covered when not in use with the supplied protective cover.
Failure to follow these instructions could lead to excessive voltages and currents being applied to the patient, resulting in cardiac arrest.
The corresponding Central Station must also be programmed to this Network Number
and Monitor Identification number.
If you have any questions about the programming status, contact your system administrator.
PatientNet Operator’s Manual, v1.04, 10001001-003, Revision B 183
All information contained herein is subject to the rights and restrictions on the title page.
WMTS TRANSCEIVERS
Displaying Transceiver Status
You can view transceiver status on the Central Station, but not on the PatientNet
Viewers (also known as the IRVS and RVS).
1. Press System on the Main screen.
2. Press OpenNet button on the Passcode screen to display the OpenNet Status
screen (fig. 90).
Fig. 90. OpenNet Status screen
Your System Administrator enables or disables the Assign TX, Program AT, and
Program IT buttons. Check with your System Administrator for more information.
The columns in the OpenNet Status screen are described below.
Ch
Module ID
Device ID
Batt
LL
RA
LA
Va
Vb, Vc
Freq Resp
Link
channel number
Transceiver ID that the channel is currently set to
Device ID of the transceiver from which the channel receives data
battery voltage of the ambulatory transceiver
left leg electrode impedance value
right arm electrode impedance value
left arm electrode impedance
chest electrode impedance value
miscellaneous electrode impedance value
frequency response programmed into each transceiver
link between the transceiver and the Central Station:
OK: the Central Station is receiving data from the transceiver
OFF: the Central Station is not receiving data
Device
Typ e
Version TX
Version RX
Ch
transceiver or bedside monitor associated with the channel
the download firmware version currently in the transceiver
the RF Module firmware version currently in the transceiver
channel number
184 PatientNet Operator’s Manual, v1.04, 10001001-003, Revision B
All information contained herein is subject to the rights and restrictions on the title page.
Impedance Values
The DT-4500 Ambulatory Transceivers electrode impedance values, which are
displayed on the OpenNet Transceiver Status screen, indicate the quality of the signal
connection and are not the actual impedance values that are measured by the system.
The electrode impedance values range from 100 to 200 (optimal). The typical values
range between 180 and 200.
If the electrode’s impedance value is greater than the defined Quality Threshold value,
then its LED is illuminated. The DT-4500 stores the Quality Threshold value and uses
this value to determine whether or not the electrode LED should be illuminated when
the Attendant Present buttons are pressed. See Figure 91 on page 190 for details on the
DT-4500 Buttons and LED indicators.
Note: A Lead Off alarm will occur when an electrode’s impedance value drops to
150 (150 is the default Loose Lead Threshold value).
User Warnings, Cautions, and Notes
Before operating the WMTS transceivers, read and follow all warnings and cautions
presented in this section.
WMTS TRANSCEIVERS
Warnings
1. Do not use the output of the DT-4500 as a synchronization source for car-
2. Do not monitor pacer patients with a 3 wire leadset when reliable pacer
3. The DT-4500 is a type BF patient applied device. It is not suitable for
4. Only authorized type BF devices can be plugged into the accessory con-
5. Total submersion of the patient worn transceiver and/or patient leadset/
6. Use only VitalCom Power Supply Part Number 395005 with the DT-7000/
diac defibrillation. Delays in presentation of the R-Wave may be as much
as 40 milliseconds.
detection is required. Pacer pulse detection can be erratic when only a
single vector is monitored. Always use a 5 wire leadset when reliable
pacer detection is required.
direct cardiac application, for use in the operating room, or during cardiac surgery. Use in these environments could cause hazardous voltages
and currents being applied to the patient’s heart, resulting in cardiac
arrest.
nector of the DT-4500 when it is applied to the patient. The accessory
connector must be kept covered when not in use with the supplied accessory connector cover. Failure to follow these instructions could lead to
hazardous voltages and currents being applied to the patient resulting in
cardiac arrest.
antenna may severely limit its transmission range causing loss of patient
monitoring. When subjecting the patient and transceiver to submersion,
he/she should be carefully monitored to ensure that there is no signal loss.
DT-7001.
PatientNet Operator’s Manual, v1.04, 10001001-003, Revision B 185
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WMTS TRANSCEIVERS
7. The DT-7000/DT-7001 is not designed as a patient contact device. Per
FCC rules, the DT-7000/DT-7001 must reside more than 20 cm (7.9
inches) from the patient.
Cautions
1. Any changes or modifications to the device that are not expressly
approved by the party responsible for compliance could void the user’s
authority to operate this equipment.
2. Electromagnetic interference or power overload, due to electrosurgical or
diathermy instruments, may damage the device.
Notes
1. This equipment has been tested and found to comply with the limits for a
CLASS B digital device, pursuant to Part 15 of the FCC Rules and CISPR 11.
These limits are designed to provide reasonable protection against harmful
interference. This equipment generates, uses, and radiates radio frequency
energy, and, if not installed and used in accordance with the instructions contained in this manual, may cause harmful interference to radio and television
communications. However, there is no guarantee that interference will not
occur in a particular installation.
If this equipment does cause harmful interference, then the user is encouraged
to try to correct the interference by one or more of the following measures:
• Move the DT-4500, the bedside device with a DT-7000 or DT-7001, or the
device being interfered with, to increase the separation between the two.
Note: Do not attempt to move fixed antennas as this can negatively impact the
PatientNet System’s operation.
• Connect the equipment into an outlet on a different circuit.
• Contact your technical service representative for assistance.
2. To ensure that the use of this product does not contribute to interference, it is
necessary to use shielded I/O cables. Connecting this device to peripheral
devices that do not comply with the CLASS B requirement or using an
unshielded peripheral data cable could result in harmful interference to radio
or television reception.
3. The DT-4500, DT-7000, and DT-7001 should be disposed of at the end of
their useful life per applicable regulations.
186 PatientNet Operator’s Manual, v1.04, 10001001-003, Revision B
All information contained herein is subject to the rights and restrictions on the title page.
Ambulatory Transceiver (DT-4500)
The DT-4500 transceiver is a battery-operated ambulatory transceiver worn by the
patient and used with a 3, 4, or 5-wire leadset that is connected to electrodes on the
patient. The transceiver is available to patients who are not confined to a bed, but still
require constant monitoring of their ECG waveforms.
Operating Instructions
Push Button Function and Use
See Figure 91 on page 190 for an image of the DT-4500 controls and LED indicators.
External Serial Devices (I/O) Connector
The External Serial Device (I/O) connector allows an external serial device or programming cable to connect and maintain a logical communication link between the
DT-4500 and the Central Station. See page 183 for details on programming the DT4500 through the I/O connector.
WMTS TRANSCEIVERS
ECG Leadset Connector
The ECG leadset connector allows the ECG leadset to attach to the DT-4500 and
maintain a logical communication link between the DT-4500 and the Central Station.
See page 195 for details on attaching the ECG leadset to the DT-4500 through the
ECG leadset connector.
Remote Record
When depressed, the Remote Record function button will initiate a strip chart recording at the Central Station.
Nurse Call
When depressed, the Nurse Call function button will initiate a Nurse Call Alarm at the
Central Station.
PatientNet Operator’s Manual, v1.04, 10001001-003, Revision B 187
All information contained herein is subject to the rights and restrictions on the title page.
WMTS TRANSCEIVERS
Attendant Present / Procedure Alarm Silence (PAS) Unlock Button
The Attendant Present/PAS Unlock Buttons consists of two buttons that are located
on either side of the transceiver (See Figure 91 on page 190). The Attendant Present
push buttons have three functions. Each function is initiated based on how long the
buttons are pressed.
1. Lead Quality
Pressing both Attendant Present buttons simultaneously will illuminate the LEDs for
each lead that has a minimum level of quality.
2. Initiating an Attendant Present Alarm
Once the transceiver is in the Power-On Mode, pressing the Attendant Present buttons
will activate the Attendant Present function and initiate an Attendant Present Alarm
at the Central Station.
3. Unlocking the PAS button
The PAS button must be unlocked or enabled prior to initiating the Procedure Alarm
Silence button. In the “locked” position, the PAS button is disabled.
To “unlock” the PAS button, press, and hold (for about two seconds), the Attendant
Present buttons until the Procedure Alarm Silence Status Indicator LED begins flashing. Once the LED indicator starts flashing, the PAS button is in the “unlocked mode”
and functional.
Note: The PAS button must be pressed while the LED is still flashing. If it is
pressed after the LED has stopped flashing, then the PAS button will automatically be “re-locked”.
188 PatientNet Operator’s Manual, v1.04, 10001001-003, Revision B
All information contained herein is subject to the rights and restrictions on the title page.
WMTS TRANSCEIVERS
Procedure Alarm Silence (PAS) Button
Depressing the PAS button, while the PAS Status Indicator LED is flashing, informs
the clinicians at the Central Station area that the attending nurse will be performing a
procedure to the patient that may cause inadvertent false alarms at the Central Station
(i.e. changing lead wires, electrodes, etc.)
Once the PAS button is pressed, the following events occur at the Central Station.
1. A timer is displayed in the fourth patient block configurable field that displays
the length of Procedure Alarm Silence time remaining on the transceiver.
CAUTION: All non-level one alarms are ignored while the PAS alarm is active.
2. “PA SILENCE” is denoted in Full Disclosure for the duration of the PAS
period.
Once the PAS button is pressed, the DT-4500 enters the PAS Mode with the following
indications:
1. The active time is set for 120 seconds and begins counting down.
2. The active time is transmitted to the Central Station.
3. The PAS Status LED indicates the time remaining through its flash speed. The
LED flash speed increases as the PAS time remaining decreases from 120 seconds to 0 seconds.
4. The attendant can reset the PAS active time to 120 seconds by pressing both
Attendant Present buttons again.
The Procedure Alarm Silence alarm remains active until one of the following conditions occur:
1. The transceiver no longer sends the procedure alarm silence indicator to the
Central Station.
2. A level one alarm is detected and triggered at the Central Station
3. The patient tile alarm text area is clicked on. All alarms are set to ON once
this area is clicked.
4. The attendant presses the PAS button while PAS is active. This will automati-
cally cancel the 120 second PAS at the Central Station, and will re-enable the
audible alarm tone.
Note: The PAS feature can be disabled by the System Administrator.
PatientNet Operator’s Manual, v1.04, 10001001-003, Revision B 189
All information contained herein is subject to the rights and restrictions on the title page.
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