SonoSite M-Turbo, Service Manual

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8 Chapter 2: System Overview
ECG Module
The ECG module allows a representation of the heart electrical activity to be displayed in real time with ultrasound
images acquired and displayed on the system video display.
The ECG module interfaces to the patient through three (3) ECG leads: Right Arm ECG lead (RA), Left Arm ECG lead
(LA), and Left Leg ECG lead (LL). The ECG received signal from the ECG electrodes are isolated, amplified, and
filtered by the ECG module before it is sent to the system for further processing and display.
The ECG module and cable are an integrated assembly. The module receives power from the system. Patient
isolation is provided by the ECG module, allowing the connection and signals to the system to be system-ground
referenced. The isolation between the patient and the system meets the requirements of IEC 601-1 for Type BF
equipment.
DICOM
The system features Digital Imaging and Communications (DICOM) capability to provide the acceptance, transfer,
display, storage, and digital processing of single ultrasound images as well as loops of ultrasound images.
IMT
The system includes the ability to measure the intima-media thickness (IMT) of the carotid artery using digital
ultrasound images. The intima is that region of the arterial wall from and including the endothelial surface at the
lumen to the luminal margin of the media. The media layer extends from the intima to the adventitia of the vessel
wall. The adventitia is normally quite echogenic on ultrasound images when compared to the media. The IMT
measurement of the carotid artery may be used adjunctively with other medical data obtained by a physician to
help assess the cardiovascular health of a patient.
System Specifications
This section contains system and accessory specifications and agency approvals. The specifications for
recommended peripherals can be found in the manufacturers’ instructions. See the applicable SonoSite accessory
user guide for information on the accessories.
Continuous Wave
Doppler Audio
Output The system provides for audio output of the CW velocity information. This can be
presented as stereo information, with flow moving towards the transducer on one
channel and flow away on the other, or as a mono output with the single audio
output representing the summation of the flow directions.
Pulsed Wave Doppler
Audio Output The system provides for audio output of the PW velocity information. This can be
presented as stereo information, with flow moving towards the transducer on one
channel and flow away on the other, or as a mono output with the single audio
output representing the summation of the flow directions.
Electrocardiograph
(ECG) Display ECG is provided to measure the electrical signal generated by the heart. A three lead
interface: Right Arm (RA), Left Arm (LA) and Left Leg (LL), is provided on the system.
The ECG signal is displayed as an amplitude-versus-time sweeping output.
Amplitude is presented on the vertical axis with time along the horizontal axis.