5 Operating procedures
28
GE Healthcare
86500-IMG rev 3
WARNING!
Ensure that the pedals are placed so that the patient cannot reach the
switches during positioning or imaging.
NOTE!
In the event that the patient faints, release the compression with the REL-
pedal, or the emergency button, or the manual compression wheels, or
switch the device off from the mains switch.
In order to ensure the correct and prolonged operation of the
compression foot pedals, avoid rough handling of the compression pedal
cables. For additional safety, Diamond’s software control system checks
that all command signals are passive during its start-up sequence.
5.6.3
Compression controls
With the Diamond, a manual or motorized compression can be used. The
majority of compressions/positioning are performed motorized. The
manual compression system is then used for the fine tuning of the
compression, if necessary.
The PADDLE pedal drives the compression paddle downwards, the C-Arm
pedal drives the C-Arm (note: not the carriage) in the direction from the
image receptor to the tube head. The ECS pedal starts the ECS-
compression where the image receptor compresses the breast against
the fixed compression paddle. The REL pedal releases the compression.
The compression force pre-selection keys determine the maximum force
that can be applied to the breast. The left key decreases and the right key
increases maximum compression force limit.
The compression force limit is programmable by the service technician
from 70N (16lbs) to a maximum of 200N (45lbs). For safety reasons,
motorized compression may be limited in position 6, for example, to 200N
(45lbs), dependent upon local regulations. As the manual compression
wheel allows considerable compression force to be applied - up to 300 N
(66 lbs.), care must be taken not to injure the breast.
Remember, care must be taken in order not to injure the breast. The
compressed breast thickness and the compression force are displayed in
the C-Arm display, see Figure 5.7, Positioning data display. The
compression system also incorporates a mechanical force limit, which is
adjusted to 300 N (67 lbs.) at the factory. The service technician may re-
adjust this limit.
Manual compression release is also possible without power to the unit
using the manual compression wheels.
5.6.4
Motorized compression
Compression is controlled in two ways: either using foot pedals or manual
compression wheels. In the event of power failure, the compression
releases automatically, except when the Delta 32 biopsy unit is connected
to the system.
Fig 5.5.
Compression force pre-
selection
FOR
TRAINING
PURPOSES
ONLY!
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