A repositioning maneuver for horizontal (lateral) canal BPPV. The patient is rotated 360 degrees in 90-degree steps while lying down, moving the displaced crystals out of the horizontal canal and back toward the utricle.
Medical definition
The BBQ roll (also called the Lempert roll or 360-degree roll maneuver) is the standard treatment for horizontal canal canalithiasis — BPPV involving the lateral semicircular canal rather than the more common posterior canal. The patient starts supine with the head turned 45 degrees toward the affected ear. They are then rotated in 90-degree steps — to nose-down, then to the unaffected ear, then to face-up again — holding each position for 30 to 60 seconds until nystagmus stops. Each step moves the displaced otoconia further around the canal toward the exit point at the utricle. The name comes from the resemblance to meat being turned on a rotisserie. The direction of the initial roll matters — toward the affected ear first. Rolling the wrong way moves the crystals deeper into the canal.
Why it matters for vertigo
Horizontal canal BPPV accounts for roughly 10 to 15% of BPPV cases and is the second most common variant after posterior canal BPPV. It is identified by the supine roll test rather than the Dix-Hallpike: the patient lies flat and the head is rapidly rotated 90 degrees to each side. Horizontal canal canalithiasis produces direction-changing geotropic nystagmus — nystagmus that beats toward the floor on both sides, but more intensely toward the affected ear. The Epley maneuver does not work for horizontal canal BPPV; using the wrong maneuver can move the crystals from horizontal into posterior canal, creating a more complex presentation. Identifying the canal and variant before choosing the maneuver is the critical step.
Where I see this in clinic
Horizontal canal BPPV is the variant most often missed in a routine clinical visit, because most clinicians only perform the Dix-Hallpike and skip the supine roll test. I include the supine roll test in every BPPV workup — both in-person in Hardoi and as part of the history-taking framework for video consultations. When a patient reports that their vertigo is triggered by rolling in bed to either side (not just one side), horizontal canal involvement becomes more likely. The BBQ roll is straightforward to perform in clinic, and resolution after a single session is common. For patients who need to do home exercises, I demonstrate the BBQ roll position sequence carefully before they leave.
Related terms
Canalithiasis – the floating-crystal mechanism the BBQ roll treats in the horizontal canal. Semicircular canals – the horizontal canal is the one treated by this maneuver. Epley maneuver – the equivalent for posterior canal BPPV. Dix-Hallpike test – identifies posterior canal BPPV; the supine roll test identifies horizontal canal.
Medical Disclaimer: This glossary entry is for educational purposes only. Canal identification before treatment is essential. Consult Dr. Prateek Porwal directly. WhatsApp: 7393062200.