There is an orientation marker on the transducer that corresponds to the marker on the screen. For the sake of not creating confusions in the direction of probe manipulation for the sonographer in the trauma centre, correspondence should always be checked.
Probe Manipulation: PART
Pressure:
Correct pressure could improve image quality whereas excessive pressure will cause underestimation of depth and discomfort of patient. Even pressure is applied to get the correct direction of scan, operator may apply uneven pressure on one side of the probe intentionally to move certain tissue.
Alignment(sliding):
Maneuver to the target of interest and optimise its display on the screen for diagnosis.
Rotation:
By rotating the probe, a true axial view of the target could be attained. It is also used to align the target into a more favorable trajectory. When applying rotation, caution is required as it could change the view into the undesired short-axis view.
Tilt:
The directions of tilt of the probe and ultrasound plan are opposite. Correct tilting could aid viewing of the long-axis of the target. If the probe is tilted out of the true axial view, false information of the target such as distorted shape and increased depth will be obtained.
Referenced form Ultrasound: Basic understanding and learning the language
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