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Getting every vertiginous patient onto a couch to go through the discomfort of a Dix-Hallpike test is time consuming, especially where an Epley manoeuvre is not then indicated.
In my own practice I have developed and use what I term a "bow and rise" test based on the anatomical positions of the posterior semicircular canals (PSSC) which are those most affected by a build up of otoliths and lie at approximately 45 degrees to the midline.
The seated patient is invited to look 45 degrees to one side (thus bringing the PSSC under test into a sagittal plane and neutralising the other in a coronal plane). The patient is invited to bow so that the head is parallel to the floor and then rise back to a seated position quickly. If the patient becomes dizzy (asking is sufficient) on one side and not the other, I carry out an Epley manoeuvre on that side.
In my experience, presentation of symptoms, positive bow and rise and Epley manoeuvre are easily performed within a 10 minute consultation with this simple application of basic anatomy.