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The Epley maneuver or repositioning maneuver is a maneuver used to treat benign paroxysmal positional vertigo (BPPV) of the posterior or anterior canals. Free floating particles from the affected semicircular canal are relocated, using gravity, back into the utricle, where they can no longer stimulate the cupula, therefore relieving the patient of bothersome vertigo. It is often performed by a medical doctor, doctor of chiropractic, occupational therapist, audiologist or physical therapist, after confirmation of a diagnosis of BPPV using the Dix-Hallpike test and has a reported success rate of between 90–95%. This maneuver was developed by Dr. John Epley and first described in 1980. Physiotherapists and some chiropractors now use a version of the maneuver called the "modified" Epley that does not include vibrations of the mastoid process originally indicated by Epley, as they have since been shown not to improve the efficacy of the treatment.
The following sequence of positions describes the Epley maneuver:
The entire procedure may be repeated two more times, for a total of three times.
During every step of this procedure the patient may experience some dizziness.
Following the treatment, the clinician may provide the patient with a soft collar, often worn for the remainder of the day, as a cue to avoid any head positions that may once again displace the otoconia. The patient may be instructed to be cautious of bending over, lying backwards, moving the head up and down, or tilting the head to either side. The soft collar is removed prior to bed. When doing so, the patient should be encouraged to perform horizontal movements of the head to maintain normal neck range of motion.
It is important to instruct the patient that horizontal movement of the head should be performed to prevent stiff neck muscles.
It is still uncertain in the research literature whether activity restrictions following the treatment improves the effectiveness of the canalith repositioning maneuver. However, patients who were not provided with any activity restrictions needed one or two additional treatment sessions in order to attain a successful outcome. The Epley maneuver appears to be a long-term effective conservative treatment for BPPV that has a limited number of complications (nausea, vomiting, and residual vertigo) and is well tolerated by patients.
The goal of the Epley or Modified Epley maneuver is to restore equilibrium of the vestibular system, more specifically to the semicircular canals to treat the symptoms associated with BPPV. There is compelling evidence that free floating otoconia, probably displaced from the otolithic membrane in the utricle are the main cause of this disequilibrium. Recent pathological findings also suggest that the displaced otoconia typically settle in the posterior semicircular canal in the cupula of the ampulla and render it sensitive to gravity. The cupula move in relation to acceleration of the head during rotary movements and signal to the brain via action potentials which way the head is moving in relation to its surroundings. However, once a crystal becomes lodged in the cupula, it only takes slight head movements in combination with gravity to create an action potential, which signals to the brain that the head is moving through space where in reality it is not, thus creating the feeling of vertigo associated with BPPV.
When a therapist is performing the Epley or Modified Epley maneuver, the patient's head is rotated to 45 degrees in the direction of the affected side, in order to target the posterior semicircular canal of the affected side. When the patient is passively positioned from an upright seated posture down to a lying (supine) position, this momentum helps to dislodge the otoconia (crystal) embedded in the cupula. Steps 3–10 in the above mentioned procedure are causing the newly dislodged crystal to be brought back to the utricle through the posterior semi circular canal so that it can be re-absorbed by the utricle.
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