D-0126440-A – 2020/08
VisualEyes™ 515/525 Instructions for Use - US Page 11
3.4.8 Reclining rotary chair (optional)
The reclining rotary chair (Figure 3.4-8) provides sinusoidal harmonic acceleration (SHA) test and step test
capability to the VisualEyes™ system. The reclining rotary chair can also be used as the exam table for
positional and caloric testing. The backrest can be reclined to 30
°
from horizontal for caloric irrigations.
Positional tests can be performed with the backrest reclined to 0
°
horizontal. For Dix-Hallpike tests, the headrest
can be removed on the System 2000 and Orion chairs to allow the clinician to bring the head below the frame.
When a top-mounted goggle is used, the velcro straps on the headrest (located on the back of the System 2000
and Orion chairs) can help to stabilize the patient's head by attaching to the goggle strap on the top-mounted
MMT goggle.
Figure 3.4-8 Reclining rotary chair.
3.4.9 AT/C rotary chairs (optional)
The user gets the additional test options of sinusoidal harmonic acceleration (SHA) test and step test by
choosing either of Orion (or existing System 2000) AT/C rotary chairs (Figure 3.4-9) as part of their VisualEyes™
system. The chair is enclosed in a light-tight booth. The laser projector is mounted on top of chair frame and this
is used to project the target stimulus in oculomotor testing and VOR fixation tests. An optokinetic drum is
mounted to the booth ceiling, which provides a full-field stripe stimulus. AT chairs have off-axis lateral movement
capability used for subjective visual vertical testing. Optionally, the rotary chair can be configured with an
electrode amplifier on the back of the chair frame to test patients with electrode lead wires for ENG evaluation.
To Next Page
Loading...
