- Dix–Hallpike test
Dix–Hallpike test Diagnostics ICD-9-CM 95.46
The Dix–Hallpike test is performed with the patient sitting upright with the legs extended. The patient's head is then rotated by approximately 45 degrees. The clinician helps the patient to lie down backwards quickly with the head held in approximately 20 degrees of extension. This extension may either be achieved by having the clinician supporting the head as it hangs off the table or by placing a pillow under their upper back. The patient's eyes are then observed for about 45 seconds as there is a characteristic 5-10 second period of latency prior to the onset of nystagmus. If rotational nystagmus occurs then the test is considered positive for benign positional vertigo. During a positive test, the fast phase of the rotatory nystagmus is toward the affected ear, which is the ear closest to the ground. The direction of the fast phase is defined by the rotation of the top of the eye, either clockwise or counter-clockwise. Home devices are available to assist in the performance of the Dix-Hallpike Maneuver for patients with a diagnosis of BPPV.
There are several key characteristics of a positive test:
- Latency of onset (usually 5–10 seconds)
- Torsional (rotational) nystagmus. If no torsional nystagmus occurs but there is upbeating or downbeating nystagmus, a central nervous system (CNS) dysfunction is indicated.
- Upbeating or downbeating nystagmus. Upbeating nystagmus indicates that the vertigo is present in the posterior semicircular canal of the tested side. Downbeating nystagmus indicates that the vertigo is in the anterior semicircular canal of the tested side.
- Fatigable nystagmus. Multiple repetition of the test will result in less and less nystagmus.
- Reversal. Upon sitting after a positive maneuver the direction of nystagmus should reverse for a brief period of time.
To complete the test, the patient is brought back to the seated position, and the eyes are examined again to see if reversal occurs. The nystagmus may come in paroxysms and may be delayed by several seconds after the maneuver is performed.
If the test is negative, it makes benign positional vertigo a less likely diagnosis and central nervous system involvement should be considered.
- ^ Dix MR, Hallpike CS (1952). "The pathology symptomatology and diagnosis of certain common disorders of the vestibular system" (Scanned & PDF). Proc. R. Soc. Med. 45 (6): 341–54. PMC 1987487. PMID 14941845. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1987487.
- ^ Dix-Hallpike manoeuvre at Who Named It?
- ^ Karen H. Calhoun; David E. Eibling (13 January 2006). Geriatric otolaryngology. CRC Press. pp. 115–. ISBN 9780824728502. http://books.google.com/books?id=1wYgAl-8ecEC&pg=PA115. Retrieved 3 July 2011.
- ^ Beyea J, Wong E, Bromwich M, Weston W, Fung K. (2007). "Evaluation of a Particle Repositioning Maneuver Web-Based Teaching Modudle Using the DizzyFIX Device.". Laryngoscope 117:.
Eponymous medical signs for eyes and ears EyesGlobe Ears
Operations/surgeries and other procedures on the ear (ICD-9-CM V3 18-20+95.4, ICD-10-PCS 09) Outer ear Middle ear Inner ear Diagnosis
Wikimedia Foundation. 2010.
Look at other dictionaries:
Dix-Hallpike test — The Dix Hallpike testcite journal |author=Dix MR, Hallpike CS |title=The pathology symptomatology and diagnosis of certain common disorders of the vestibular system |journal=Proc. R. Soc. Med. |volume=45 |issue=6 |pages=341–54 |year=1952… … Wikipedia
Dix-Hallpike test — Hallpike test a test for benign paroxysmal positional vertigo (BPPV), performed with the patient first sitting upright on an examination couch and then lying supine with the head and neck extended beyond the edge of the couch. The patient s head… … The new mediacal dictionary
Dix-Hallpike test — see under maneuver … Medical dictionary
Dix-Hallpike maneuver — a test for benign positional vertigo: the examiner turns the head of the seated patient to one side and pulls the patient backwards into a supine position with the head hanging over the edge of the examining table; the patient then looks straight … Medical dictionary
Hallpike test — see Dix Hallpike test … The new mediacal dictionary
Dix-Hallpike maneuver (test) — Dix Hall·pike maneuver (test) (diksґ hawlґpīk) [Margaret R. Dix, British otologist, 20th century; Charles Skinner Hallpike, British otologist, 1900â€“1979] see under maneuver … Medical dictionary
Charles Skinner Hallpike — Charles Skinner Hallpike, CBE, FRS (19 July 1900 – 26 September 1979) was an English otologist. He was born in Murree, India, a hill station now in Pakistan, the son of Frank Hallpike. The family returned to the UK when he was 3 years old. He… … Wikipedia
Caloric reflex test — Nystagmus test redirects here. For the field sobriety test, see horizontal gaze nystagmus test. Caloric reflex test Diagnostics ICD 9 CM 95.44 In medicine, the caloric reflex test (sometimes termed vestibular caloric stimulation ) i … Wikipedia
Miller Fisher test — The Miller Fisher test is a diagnostic procedure used to confirm suspected normal pressure hydrocephalus (NPH). The Miller Fisher test confirms NPH if the removal of 30 mL of cerebrospinal fluid (CSF) results in clinical improvement of NPH… … Wikipedia
Benign paroxysmal positional vertigo — Classification and external resources Exterior of labyrinth. ICD 10 H … Wikipedia