![]() ![]() NB: be cautious if the person has a neck or back problem, or cardiovascular problems such as carotid sinus syncope, as it involves turning the head and extending the neck. If nystagmus is present, maintain the position for its duration (maximum 2 minutes if persistent) and note its duration, type, direction and latency. Observe their eyes closely for up to 30 seconds for the development of nystagmus.Support the head to maintain this position for at least 30 seconds. From this position, lay the person down rapidly (over 2 seconds), supporting their head and neck, until their head is extended 20-30° over the end of the couch with the chin pointing slightly upwards and the test ear downwards.Ask the person to sit upright on the couch with their head turned 45° to one side.Ask the person to keep their eyes open throughout the manoeuvre and to look straight ahead. ![]()
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