Systematic Exploration
Once the patient has placed his glasses and focused eye must perform the relevant calibration and then begin testing the various exploration.
- Look at whether there are spontaneous nystagmus
- Initiated movements dug, they can be horizontal and vertical. We present the speed of stimulus amplitude and latency effect. The normal or not depends on whether or not there is pathology in the CNS
- We follow the movements of both horizontal smooth pursuit and vertical. These tests are included in the study of the oculomotor system, and are tracking several test voluntary visual stimuli. It is recognized as in movements drawn stimulus speed, latency and amplitude of the stimulus.
- Optokinetic explorations help us to observe involuntary responses of occipital cortex
- Tests which we call the study of positional nystagmus or individuals may also be larger and more complex, since we make many eye movements of head, neck trunk and so on. They are actually provoke nystagmus
- Caloric tests and possibly the basic considerations for our ENT field are those who can provide more specific data.
Basically caloric tests must meet special rules and systematized as follows:
The patient is supine with the head flexed approximately 30 degrees to the horizontal semicircular canal is completely horizontal and blindfolded, one by the infrared camera and one with the accessory.
Stimulation performed in the first place in the right ear with cold water at 30 degrees and during irrigation time of 30 seconds, then look registration, ie the responses to stimulation triggered and the duration of registration is a minimum of 250 seconds.
The following stimulation is in the left ear and wait about 5 minutes to perform, just to let stand the maze and mechanics that we are identical.
The following stimulation, also leaving a rest between them in about 5 minutes, is in the right ear with warm water (44 degrees Celsius) and subsequently in the left ear.
Tags: Exploration of Vertigo, Medical Advices, vertigo
