AU-cardiac

Rotation

During a “clean” rotation, the direction of the tail of the transducer should be kept 100% stable

Rotation can be:
– Right = clockwise
– Left = counterclockwise

For rotational instructions we do not make use of a secondary reference point

Example:
To obtain the correct subcostal 4 chamber view, alignment with the longitudinal axis of the heart often requires 10-20 degrees counterclockwise rotation

You will therefore often hear the supervisor saying: “Rotate the probe counterclockwise or rotate the transducer to the left”

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Rotation as it takes place in the parasternal view

Tilting

Tilting is the most difficult transducer movement to communicate because it can take place in two planes

Tilting can be:
1. upwards or downwards
2. side to side

Reference according to the tail of the transducer and a secondary reference point is important during guidance in tilting of the probe

Example:
To obtain the correct LV parasternal short axis view the probe should often have an inclination with the chest wall of 20-30 degrees

You will therefore often hear the supervisor saying: “Lift the tail of the probe towards the right shoulder of the volunteer or patient”

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Top: tilting upwards/downwards
Bottom: tilting side to side

Manipulating the probe

A terminology to describe the movement of the probe during scanning is important in order to optimise the image

During the workshop it makes it easier for the supervisor to give instructions without touching the probe which is crucial for the novice in order to achieve practical skill

There are many available descriptions of the method of manipulation of the probe

We recommend using:
1. rotation
2. tilt
3. slide

These movements are applicable to all scanning locations

As a novice – always, only move the probe in one direction at a time

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Figure showing movements in three different spatial directions
The icon at the bottom indicates that movement should only take place in one plane at the time

XX 9 – Instruction in manipulation of the probe

During the workshops the supervisors are encouraged to give instructions with reference to the tail of the transducer and a secondary reference point when appropriate

Examples of secondary reference points:
1. anatomical land marks in relation to the volunteer or patient
2. physical land marks like the bed
3. spatial: left/right – upwards/downwards – medial/lateral

When complying with an instruction, never do any movements in other directions

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Transducer manipulations with reference to the tail of the probe and four different secondary reference points: X, Y, Z ,V

XX 4 – The orientation marker on the transducer

The probe is fitted with an orientation marker (OM)

On the image the OM is indicated by a green arrow

The OM facilitates the correct orientation of the probe on the patient

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The OM (green arrow) has to be oriented in correct relationship with the corresponding orientation indicator (OI) on the monitor

Display of the sector on the screen

In FATE and adult cardiac ultrasound, the ultrasound image displays the sector with the two radii diverging from the top of the screen

The orientation indicator is on the right side of the screen, and the arch of the sector is displayed towards the bottom of the screen

The ultrasound image on the screen can be turned upside/down or left/right with user controls

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The video clip shows the ultrasound sector placed correctly and incorrectly. Remember that the right orientation is with the top of the sector pointing upwards, and the orientation indicator (OI) on the right side of the screen. (Please note, the video may be slow to load depending on your internet connection)