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Standard operating procedure
ECG modem transmission and troubleshooting No:005D
This SOP offers guidance on transmitting ECG recordings for
analysis via a modem, it also offers some troubleshooting advice.
Following a successful ECG recording from a subject the information
obtained needs to be stored in the ECG "memory" database. This
is achieved by following the guidelines laid down by SOP 004.
Prior to sending it via the modem for analysis, data can be
retrieved at any time. ECG data will be sent via the modem on
a weekly basis.
Research nurses trained in the method are responsible for transmitting
ECG readings for analysis via the modem. They are also responsible
for ensuring that the ECG machine is functioning and programmed
machine (Siemens -Sicard 440)
Preparation of equipment
All ECG data
needs to be sent via the modem to Professor Macfarlane (Glasgow,
Scotland) for analysis. Each machine has been programmed to
allow a manual transmission of this ECG data to the appropriate
the modem to the ECG machine using the correct cable. Then
ensure the mains supply is available to both the ECG and modem.
The modem does not have an ON/OFF switch, but ensure that
the ECG machine is switched onto the mains and not working
on the battery.
the appropriate modem cable to the telephone socket.
modem buttons DO NOT need to be altered. The buttons displayed
on the machine should not be depressed. These buttons are
not required for ECG transmission for this study.
NOT ATTEMPT TO TRANSMIT ANY ECG RECORDINGS UNTIL YOU HAVE
TWO HARD COPIES OF THE READINGS. NO RECORDINGS CAN BE PRINTED
on the ECG machine using button 1 (OO).
machine will perform a self test. When completed the viewfinder
will display "Self test OK" .
to transmitting the ECG's to Scotland a list of the ECG's
currently stored in the memory should be obtained. This enables
ECG's which may potentially be lost during transmission to
have the original printed ECG hard copy photocopied and posted
to Scotland for analysis.
ECG data lists can be obtained by selecting the Dir from the
main menu (key top right hand side of machine), using the
menu and arrow keys. After Dir has been selected the ECG machine
will generate a printed list of the subject's ID details stored
on the machine. File this list in a designated file to keep
a record of all ECG's sent to Scotland.
- To modem
the ECG's to Professor Macfarlane, press the menu button (top
right hand side of keys). The viewfinder will display a list
of variables. Select the "SEND" option and ensure it is flashing,
by pressing keys LEFT or RIGHT arrow keys. After selection,
SEND should be seen flashing in the viewfinder. If it is not
selected it will not flash, proceed until it flashes.
the RETURN or DOWN arrow key. Select the ALL variable, using
the or LEFT or RIGHT arrow keys as before. This enables all
the ECG's in the memory database to be sent. Press the RETURN
key to transmit the recordings via the modem.
- A successful
connection will display "TRANSMISSION IN PROGRESS" in the
left hand side of the viewfinder.
the viewfinder to ensure the transmission of data has commenced.
During transmission, f and w should flash (alternately) in
the viewfinder right hand corner. The left hand side of the
viewfinder will display how many ECG's have been transmitted
or are left to transmit.
ECG takes approximately 1 minute to be transmitted. If several
ECG's are to be transmitted the machine can be left alone
to transmit them. However, it is best to keep checking there
has not been a break in transmitting. If there is a break,
the programming steps may need to be repeated.
an ECG has been transmitted, it is erased from the memory.
IT IS THEREFORE VITAL THAT A HARD COPY HAS ALREADY BEEN PRINTED.
transmission has been completed, switch off the machine by
pressing the OO button. To check the transmission has been
successful, switch on the machine. Look in the < > box, it
should state 80 memory spaces available. If not, re-transmit
the ECG readings.
from messages displayed in the viewfinder.
- the ECG machine has run out of paper. Reload the paper and
restart the recording again. Paper loading instructions can
be read in the operating manual p23.
LOW - always recharge the machine overnight. Whenever possible
always use the machine on the mains supply. This will prevent
the battery becoming too low and not able to perform an ECG
when a mains supply is unavailable. A fully recharged battery
is sufficient for about 3 hours of recordings.
- The transmission
phone number should always remain the same. However, the steps
to either check the telephone number or to enter a new number
are as follows:-
the menu button and select CONNECTION using the LEFT or
RIGHT arrow keys (as before).
the DOWN key, select modem 1 to transmit recordings or manual
to check the following settings. Using the DOWN or RIGHT key
ensure the settings read :-
switch = NO
type = HAYES
modem standard = (no setting)
command = atz
sequence = ats2 = 255
command = atdt
RETURN to check or re-programme the telephone number.
Telephone number = Yes or
telephone number = 0141 552 8009 (for direct line)
or enter your outside number code e.g. 9 then the telephone
number 0141 552 8009 for a connection from the London
- In the
event of problems, please telephone Mr Shahid Latif who will
try to assist. His direct line is 0141 211 4860. If he is
not available, try to reach Professor Macfarlane on 0141 211
Sicard 440 operating and programming instructions. Sweden.