Interacoustics Virtual SVV, Instructions For Use Manual, Page: 31 / 436

Virtual SVV™ Instructions for Use – EN Page 27
5.4.2 Viewing the sequence of measurement positions
The Static Tilt planned measurement sequence can be viewed in the upper left area in the application
software. Normally the 0° head upright position is preselected and the corresponding block for that
measurement is shaded orange. The order of positions can be altered by checking the desired block. In
addition to the current measurement position marked in orange, the pending measurement position is
displayed below the block diagram.
In each position up to ten measurements can be performed. No further measurements are possible in a
given position.
5.4.3 Adjusting the patient
Before commencing with the measurements in any one position, the patient must be secured correctly
with the head set to the specified tilt angle as accurately as possible. To assist with the adjustment, the
tolerance range for the respective head tilt is indicated green on the tilt angle indicator. The center of the
dial remains green as long as the head tilt is within the tolerance range. The green marked frame range
can be configured by changing the median tolerance settings.
Figure 5-8 Green indicators in head tilt dial to help maintain desired head tilt
5.4.4 Performing measurements
When the patient is secured in the selected tilt position, measurement can be started by clicking the Start
button. As an additional operator cue, the outer rings of the two dials are illuminated in orange until the
patient has confirmed his/her estimate.
As soon as the Start button is activated the luminous line appears at an arbitrary angle in the virtual
reality goggle. The patient is then instructed to rotate the line to gravity-vertical.
The device monitoring elements in the application software provide the operator with real-time information
for the head tilt angle, the angle of the luminous line and the button activation. Each button symbol
illuminates orange when the corresponding button the handheld remote is pressed by the patient.
NOTICE
Note that the two dials for head tilt angle (
α
) and SVV (
β
) are configured from the viewpoint of the
examiner.
IMPORTANT
Maintain observation of the patient throughout the entire procedure in order to respond quickly in case of
any discomfort. If the patient is tested in a tilted position or rotated on a rotary chair ensure that he/she is
held securely.