Head Calibrations; Prepare Patient; Start Head Calibration - Interacoustics EyeSeeCam vHIT Manual De Instrucciones

Head calibrations

After completing the standard (eye) calibration, then you should calibrate the head position of the patient
before beginning impulses. You can click on the Head calibration heading in the recordings menu to
begin.

Prepare Patient

Begin by selecting Prepare and instructing the patient.
Figure 4.3.1-1 Lateral Impulse Prepare
The head movements can be passive, where the clinician moves the patient's head, or active where the
patient moves their own head.
The patient is instructed to keep his eyes on the target on the wall and oscillating the head gently, first
around the yaw axis (like shaking your head "no") and, after a few oscillations, around the pitch axis (like
nodding your head "yes"). The examiner can perform the head calibration by standing behind the patient
and grabbing the head the same way as during head impulse testing of the lateral canals. About five
sinusoidal oscillations in both yaw and pitch directions need to be performed at moderate peak head
velocities not exceeding 100 deg/sec. The total duration of the head calibration is on the order of 15 sec.

Start Head calibration

Select Start to begin the test and select stop when finished.
Figure 4.3.2-1 Diagram showing the different planes of head rotations.
EyeSeeCam vHIT - Instructions for Use - EN Page 17