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Özel HE, Acar M. Partial Treatment During BPPV Diagnostic Maneuvers. Indian J Otolaryngol Head Neck Surg 2024; 76:3481-3484. [PMID: 39130220 PMCID: PMC11306832 DOI: 10.1007/s12070-024-04574-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Accepted: 02/19/2024] [Indexed: 08/13/2024] Open
Abstract
This study examines a case of lateral canal benign paroxysmal positional vertigo (BPPV) where the sequence of diagnostic positional maneuvers may have influenced the release of some canaliths into the utricle. Partial treatment during BPPV diagnostic maneuvers may complicate side identification during supine roll test, especially in canalolithiasis cases.
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Affiliation(s)
- Halil Erdem Özel
- Department of Otolaryngology, Kocaeli City Hospital, University of Health Sciences, Izmit, Turkey
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2
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Bhandari R, Bhandari A, Hsieh YH, Edlow J, Omron R. Prevalence of Horizontal Canal Variant in 3,975 Patients With Benign Paroxysmal Positional Vertigo: A Cross-sectional Study. Neurol Clin Pract 2023; 13:e200191. [PMID: 37664131 PMCID: PMC10473829 DOI: 10.1212/cpj.0000000000200191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 07/07/2023] [Indexed: 09/05/2023]
Abstract
Background and Objectives Current understanding based on older studies is that pc-BPPV is far more common than hc-BPPV. Such studies are limited by small sample sizes, and often the supine roll test for hc-BPPV is not performed. To better estimate the prevalence of hc-BPPV, we studied a large cross-section of patients with VOG-diagnosed BPPV. Methods Using a cross-sectional study of patients with BPPV, we investigated patients referred to NeuroEquilibrium specialty clinics throughout India between January 1, 2021, and December 31, 2021. All patients were evaluated with video oculography (VOG) during positional tests, and all diagnoses were confirmed by a neurotologist and neurologist. Results Of 3,975 patients with VOG-confirmed and specialist-diagnosed BPPV (median age, 51 years; 56.6% women), pc-BPPV accounted for 1,901 (47.8%), hc-BPPV was seen in 1,842 (46.3%), and anterior canal BPPV was found in 28 (0.7%) patients. Discussion This study found that hc-BPPV is far more common than previously reported. It is important to perform the supine roll test in addition to the Dix-Hallpike in all patients suspected with BPPV. Better training to diagnose patients with BPPV and to accurately recognize the nystagmus pattern of hc-BPPV should be a priority.
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Affiliation(s)
- Rajneesh Bhandari
- NeuroEquilibrium Diagnostic Systems Pvt Ltd. (RB); Vertigo and Ear Clinic (AB), Jaipur, India; Johns Hopkins School of Medicine (Y-HH, RO), Baltimore, MD; and Harvard Medical School (JE), Boston, MA
| | - Anita Bhandari
- NeuroEquilibrium Diagnostic Systems Pvt Ltd. (RB); Vertigo and Ear Clinic (AB), Jaipur, India; Johns Hopkins School of Medicine (Y-HH, RO), Baltimore, MD; and Harvard Medical School (JE), Boston, MA
| | - Yu-Hsiang Hsieh
- NeuroEquilibrium Diagnostic Systems Pvt Ltd. (RB); Vertigo and Ear Clinic (AB), Jaipur, India; Johns Hopkins School of Medicine (Y-HH, RO), Baltimore, MD; and Harvard Medical School (JE), Boston, MA
| | - Jonathan Edlow
- NeuroEquilibrium Diagnostic Systems Pvt Ltd. (RB); Vertigo and Ear Clinic (AB), Jaipur, India; Johns Hopkins School of Medicine (Y-HH, RO), Baltimore, MD; and Harvard Medical School (JE), Boston, MA
| | - Rodney Omron
- NeuroEquilibrium Diagnostic Systems Pvt Ltd. (RB); Vertigo and Ear Clinic (AB), Jaipur, India; Johns Hopkins School of Medicine (Y-HH, RO), Baltimore, MD; and Harvard Medical School (JE), Boston, MA
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3
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Ludwig D, Schubert MC. Resolution of atypical posterior semicircular canal BPPV: evidence for putative short-arm location. BMJ Case Rep 2023; 16:e254579. [PMID: 37247949 PMCID: PMC10230912 DOI: 10.1136/bcr-2023-254579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Abstract
This case demonstrates the successful identification and treatment of atypical posterior semicircular canal benign paroxysmal positional vertigo (BPPV) based on a unique presentation of positional nystagmus, the resultant nystagmus from repositioning manoeuvers, and restored function of the affected semicircular canal. This case illustrates the importance of completing a comprehensive clinical examination and the value for incorporating the video head impulse test as well as adjusting treatment based on testing and patient response when managing variant cases of BPPV.
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Affiliation(s)
- Daniel Ludwig
- Physical Medicine and Rehabilitation, Johns Hopkins University, Baltimore, MD, USA
| | - Michael C Schubert
- Physical Medicine and Rehabilitation, Johns Hopkins University, Baltimore, MD, USA
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University, Baltimore, Maryland, USA
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Kalmanson O, Foster CA. Cupulolithiasis: A Critical Reappraisal. OTO Open 2023; 7:e38. [PMID: 36998555 PMCID: PMC10046726 DOI: 10.1002/oto2.38] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 01/04/2023] [Accepted: 01/21/2023] [Indexed: 03/06/2023] Open
Abstract
Objective To review the history and pathophysiologic theories for cupulolithiasis and canalith jam in benign paroxysmal positional vertigo. Data Sources PubMed, Google Scholar. Review Methods Three PubMed and Google Scholar searches were performed, keywords: "cupulolithiasis," "apogeotropic [and] benign," and "canalith jam," resulting in 187 unique full-text articles in English or with English translation. Figures-Labyrinthine photographs were obtained of fresh utricles, ampullae, and cupulae of a 37-day-old mouse. Conclusions Freely moving otoconial masses explain most cases (>98%) of benign paroxysmal positional vertigo. Evidence that otoconia adhere strongly or persistently to the cupula is lacking. Apogeotropic nystagmus in the horizontal canal form is often attributed to cupulolithiasis; however, periampullary canalithiasis explains self-limited nystagmus, and reversible canalith jam explains prolonged apogeotropic nystagmus. Treatment-resistant cases can be explained by entrapment of particles in the canals or ampullae, but persistent adherence to the cupula remains theoretical. Implications for Practice Apogeotropic nystagmus is usually due to freely moving particles and should not be used in studies of horizontal canal benign paroxysmal positional vertigo as the sole method to define entrapment or cupulolithiasis. Caloric testing and imaging may help differentiate jam from cupulolithiasis. Treatment for apogeotropic benign paroxysmal positional vertigo should include maneuvers that rotate the head through 270° to fully clear the canal of mobile particles, using mastoid vibration or head shaking if entrapment is suspected. Canal plugging can be used for treatment failures.
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Affiliation(s)
- Olivia Kalmanson
- Department of Otolaryngology University of Colorado Anschutz SOM Boulder Colorado USA
| | - Carol A. Foster
- Department of Otolaryngology University of Colorado Anschutz SOM Boulder Colorado USA
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Kim JM, Lee SH, Kim HJ, Kim JS. Less talked variants of benign paroxysmal positional vertigo. J Neurol Sci 2022; 442:120440. [PMID: 36244097 DOI: 10.1016/j.jns.2022.120440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/18/2022] [Accepted: 09/25/2022] [Indexed: 11/25/2022]
Abstract
The diagnostic criteria were established for benign paroxysmal positional vertigo (BPPV), the most common vestibular disorder worldwide, by the Barany Society in 2015. This marked an important milestone in the diagnosis and treatment of BPPV. However, there still remain uncertainties and ambiguities regarding the clinical features and pathophysiology of BPPV, and its clinical variants. In this manuscript, we will discuss 1) the emerging and controversial syndromes of BPPV (i.e., canalolithiasis of the anterior canal, cupulolthiasis of the posterior canal, and lithiasis of multiple canals) with updates, 2) atypical nystagmus according to the canal involved (e.g., nystagmus induced by head position changes in the pitch plane in horizontal canal BPPV, and positional downbeat nystagmus in posterior canal BPPV), 3) persistent geotropic positional nystagmus. Consideration of these uncommon types and manifestations of BPPV would broaden our understanding of BPPV pathomechanisms and allow differentiation from central vertigo and nystagmus.
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Affiliation(s)
- Jae-Myung Kim
- Department of Neurology, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Seung-Han Lee
- Department of Neurology, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Hyo-Jung Kim
- Research Administration Team, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Ji-Soo Kim
- Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea.
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6
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Bhandari A, Bhandari R, Kingma H, Strupp M. Modified Interpretations of the Supine Roll Test in Horizontal Canal BPPV Based on Simulations: How the Initial Position of the Debris in the Canal and the Sequence of Testing Affects the Direction of the Nystagmus and the Diagnosis. Front Neurol 2022; 13:881156. [PMID: 35711266 PMCID: PMC9197467 DOI: 10.3389/fneur.2022.881156] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 04/12/2022] [Indexed: 11/20/2022] Open
Abstract
Background and Objectives The aim of this study was to show with three-dimensional simulations how the diagnostic supine roll test (SRT) is affected by the initial position of the debris within the horizontal canal (hc) and study the nystagmus patterns on changing the sequence of testing and its impact on the diagnosis of the side of involvement in hc-BPPV. Methods A 3D dynamic simulation model was developed and applied based on reconstructed MRI images and fluid dynamics. Each semicircular canal was linked to the respective extraocular muscles to visualize nystagmus generated on stimulation of the canal. Results The simulations of hc-canalithiasis showed that the nystagmus pattern seen with the SRT is changed by the initial position of the otolith debris within the canal and the sequence of testing. The debris changes position during SRT so that sequential steps do not start at the initial position as previously assumed. The sequence of performing the SRT steps from the right or left side influences the nystagmus pattern generated: bilateral direction-changing, bilateral direction-fixed, and unilateral nystagmus can be seen in different test conditions. The SRT itself may even reposition the debris out of the canal. Conclusions and Clinical Implications Simulations provide a dynamic tool to study the diagnostic SRT in hc-canalithiasis. Starting the SRT from right or left has a major impact on the test outcome (unlike the Dix-Hallpike maneuver). The findings provide a new interpretation for the results of the SRT. The simulations explain the phenomenon of direction-fixed nystagmus as a logical consequence of starting the SRT with the head turned toward the non-affected side in hc-canalithiasis with debris in the ampullary arm. They also show that unilateral nystagmus seen on SRT indicates canalithiasis of the non-ampullary arm of the side opposite to the side of nystagmus. The generation of bilateral direction-changing, bilateral direction-fixed, and unilateral nystagmus can be the cause of misdiagnoses in terms of the affected side and underlying mechanisms. Finally, a recommendation for a standardized protocol for the sequence of positional tests should be established to ensure uniform interpretation of test results.
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Affiliation(s)
| | | | - Herman Kingma
- Faculty of Physics, Tomsk State University, Tomsk, Russia.,Department of Ear Nose Throat, Aalborg University, Aalborg, Denmark.,Department of Otorhinolaryngology, Head and Neck Surgery, Maastricht University Medical Centre, Maastricht, Netherlands
| | - Michael Strupp
- Department of Neurology, German Center of Vertigo and Balance Disorders, Ludwig Maximilian University, Munich, Germany
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Libonati GA, Martellucci S, Castellucci A, Malara P. Minimum Stimulus Strategy: A step-by-step diagnostic approach to BPPV. J Neurol Sci 2022; 434:120158. [DOI: 10.1016/j.jns.2022.120158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/15/2021] [Accepted: 01/13/2022] [Indexed: 11/29/2022]
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Castellucci A, Botti C, Martellucci S, Malara P, Delmonte S, Lusetti F, Ghidini A. Spontaneous Upbeat Nystagmus and Selective Anterior Semicircular Canal Hypofunction on Video Head Impulse Test: A New Variant of Canalith Jam? J Audiol Otol 2021; 26:153-159. [PMID: 34802218 PMCID: PMC9271735 DOI: 10.7874/jao.2021.00297] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 09/04/2021] [Indexed: 11/27/2022] Open
Abstract
We describe a rare case of spontaneous upbeat nystagmus (UBN) attributable to a canalith jam involving the anterior semicircular canal (ASC) in a patient in whom comprehensive vestibular assessment was useful to identify the underlying pathomechanism. A 56-year-old woman with unsteadiness following repositioning procedures for left-sided benign paroxysmal positional vertigo (BPPV) presented with spontaneous UBN that showed slight right torsional components. A vestibular test battery detected isolated left ASC hypofunction on a video-head impulse test (Video-HIT). We postulated a persistent utriculopetal deflection of the left ASC cupula, which was attributable to entrapment of debris in a narrow canal tract, with consequent sustained inhibition of the ampullary afferents. Although spontaneous UBN receded after impulsive physical therapy, unsteadiness deteriorated into positional vertigo secondary to canalolithiasis involving the ipsilateral posterior canal. In our view, physical therapy possibly fragmented the canalith jam and released free-floating otoconia that eventually settled into the ipsilateral posterior canal. Video HIT revealed normalization of ASC hypofunction, and left-sided posterior canal canalolithiasis was successfully treated using appropriate repositioning procedures. We propose that a canalith jam involving the ASC should be considered in the differential diagnosis of spontaneous UBN, particularly in patients with a history of BPPV and isolated ASC hypofunction detected on video HIT.
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Affiliation(s)
- Andrea Castellucci
- ENT Unit, Department of Surgery, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Cecilia Botti
- ENT Unit, Department of Surgery, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy.,PhD Program in Clinical and Experimental Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | | | - Pasquale Malara
- Audiology & Vestibology Service, Centromedico, Bellinzona, Switzerland
| | - Silvia Delmonte
- ENT Unit, Department of Surgery, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Francesca Lusetti
- ENT Unit, Department of Surgery, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Angelo Ghidini
- ENT Unit, Department of Surgery, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
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Evidence of Large Vestibulo-Ocular Reflex Reduction in Patients With Menière Attacks. Otol Neurotol 2021; 41:e1133-e1139. [PMID: 32925854 DOI: 10.1097/mao.0000000000002746] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To examine the high frequency horizontal vestibular ocular-reflex (hVOR) during acute attacks of vertigo in Menière's disease (MD). STUDY DESIGN Retrospective case series and literature review. SETTING Tertiary academic medical center. PATIENTS Patients with clinical diagnosis of unilateral "definite MD." INTERVENTION Review of medical records. MAIN OUTCOME MEASURES Spontaneous nystagmus and the dynamic hVOR gain change at different stages of an acute episode of MD attack. RESULTS We studied 10 vertigo attacks during the unique stages of the episode. During the acme stage of the attack, lower hVOR gain was recorded on the affected side (mean 0.48 ± 0.23), which was associated with a paralytic nystagmus (beating away from the affected ear). Additionally, the mean hVOR gain remained significantly (p < 0.05) reduced during each of the other stages of the attack as compared with the unaffected side and a control group. After the attack, mean hVOR gains normalized in the affected ear. Mean hVOR gain of the unaffected ear remained normal during all stages. CONCLUSION Vestibular function during an attack of MD is a dynamic process associated with fluctuation of the dynamic (hVOR gain) and static (spontaneous nystagmus) processes, which exist in parallel with the perception of vertigo. Our data support vHIT monitoring during an episode to provide objective and accurate evidence of the ear with active disease. This would be particularly useful for those patients with MD presentations of unreliable hearing or assisting to identify the ear to be treated in the case of bilateral MD.
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10
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Martellucci S, Castellucci A, Malara P, Pagliuca G, Clemenzi V, Stolfa A, Gallo A, Libonati GA. Spontaneous Jamming of Horizontal Semicircular Canal Combined with Canalolithiasis of Contralateral Posterior Semicircular Canal. J Audiol Otol 2021; 26:55-60. [PMID: 33562956 PMCID: PMC8755438 DOI: 10.7874/jao.2020.00507] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 12/17/2020] [Indexed: 11/22/2022] Open
Abstract
Spontaneous canalith jam is an uncommon form of benign paroxysmal positional vertigo mimicking acute vestibular neuritis. We described for the first time a spontaneous horizontal semicircular canalith jam associated with a typical canalolithiasis involving contralateral posterior semicircular canal (PSC), illustrating how the latter condition modified direction-fixed nystagmus during head movements. An 81-year-old woman with persistent vertigo referred to our center. Video-Frenzel examination showed horizontal direction-fixed right-beating nystagmus in primary gaze position, inhibited by visual fixation. She exhibited corrective saccades after leftward head impulses. Chin-to-chest positioning at the head-pitch test did not modify spontaneous nystagmus, whereas slight torsional components with the top pole of the eye beating toward the right ear appeared in backward head-bending, resulting in mixed horizontal-torsional nystagmus. At supine positioning tests, direction-fixed nystagmus turned into direction-changing geotropic horizontal nystagmus, which was stronger on the left side, while overlapping upbeat nystagmus with torsional right-beating components appeared on the right. Primary clinical findings were consistent with a left horizontal semicircular canalith jam, inducing a persistent utriculofugal cupular displacement, combined with a typical right-sided PSC-canalolithiasis. Once canalith jam crumbled, resulting in a non-ampullary arm canalolithiasis of the horizontal semicircular canal, both involved canals were freed by debris with appropriate repositioning procedures.
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Affiliation(s)
| | - Andrea Castellucci
- ENT Unit, Arcispedale Santa Maria Nuova, AUSL-IRCCS, Reggio Emilia, Italy
| | - Pasquale Malara
- Audiology and Vestibology Service, Centromedico Bellinzona, Bellinzona, Switzerland
| | | | - Veronica Clemenzi
- ENT Unit, Santa Maria Goretti Hospital, AUSL Latina, Italy.,Department of Sense Organs, Sapienza University of Rome, Italy
| | - Andrea Stolfa
- ENT Unit, Santa Maria Goretti Hospital, AUSL Latina, Italy.,Department of Sense Organs, Sapienza University of Rome, Italy
| | - Andrea Gallo
- ENT Unit, Santa Maria Goretti Hospital, AUSL Latina, Italy.,Department of Sense Organs, Sapienza University of Rome, Italy
| | - Giacinto Asprella Libonati
- U.O.S.D. "Vestibologia e Otorinolaringoiatria" Presidio Ospedaliero "Giovanni Paolo II", Policoro, Italy
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Castellucci A, Malara P, Martellucci S, Delmonte S, Ghidini A. Fluctuating Posterior Canal Function in Benign Paroxysmal Positional Vertigo Depending on How and Where Otoconia Are Disposed. Otol Neurotol 2021; 42:e193-e198. [PMID: 33273306 DOI: 10.1097/mao.0000000000002913] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Though fluctuations in vestibular function represent a common finding in Menière's disease, we describe how benign paroxysmal positional vertigo (BPPV) may result in fluctuations of vestibulo-ocular reflex for the involved canal depending on the disposition of otoliths. PATIENT A 54-year-old woman suffering from refractory posterior canal (PC)-BPPV resulting in fluctuating PC function. INTERVENTIONS Diagnostic evaluation and rehabilitative treatment for BPPV involving the affected PC. MAIN OUTCOME MEASURES Video-Frenzel and video-head impulse test (vHIT) findings before and after canalith repositioning procedures for PC-BPPV. RESULTS BPPV involving the nonampullary arm of right PC was diagnosed based on presenting positional downbeat nystagmus and selective right PC hypofunction at the vHIT. During physical treatment, nystagmus first became positional paroxysmal upbeat likely due to a shift of debris into the ampullary arm of the canal, then turned to spontaneous downbeat nystagmus consistently with a plug effect exerted by particles entrapped within the nonampullary arm of PC and finally receded proving an otoliths fall within the utriculus. Simultaneously, vHIT documented fluctuations for right PC vestibulo-ocular reflex gain as it first increased to normal values, then severely declined and finally normalized, respectively. High-resolution computed tomography scan detected ipsilateral superior canal dehiscence. CONCLUSIONS In accordance with recently reported vHIT findings in different types of BPPV, fluctuation of PC function could be likely explained by the effect of particles on cupular dynamic responses depending on the portion of the canal gradually involved. Superior canal dehiscence may have played a role facilitating otoliths mobilization by reducing labyrinthine impedance.
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Affiliation(s)
- Andrea Castellucci
- ENT Unit, Department of Surgery, Azienda USL - IRCCS, Reggio Emilia, Italy
| | - Pasquale Malara
- Audiology and Vestibology Service, Centromedico, Bellinzona, Switzerland
| | | | - Silvia Delmonte
- ENT Unit, Department of Surgery, Azienda USL - IRCCS, Reggio Emilia, Italy
| | - Angelo Ghidini
- ENT Unit, Department of Surgery, Azienda USL - IRCCS, Reggio Emilia, Italy
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12
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Califano L, Iannella R, Mazzone S, Salafia F, Melillo MG. The Video Head Impulse Test in the acute stage of posterior canal benign paroxysmal positional vertigo. ACTA OTORHINOLARYNGOLOGICA ITALICA : ORGANO UFFICIALE DELLA SOCIETA ITALIANA DI OTORINOLARINGOLOGIA E CHIRURGIA CERVICO-FACCIALE 2021; 41:69-76. [PMID: 33746225 PMCID: PMC7982752 DOI: 10.14639/0392-100x-n1033] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 11/02/2020] [Indexed: 11/23/2022]
Abstract
OBJECTIVE Study the high-frequency vestibulo-oculomotor reflex in posterior canal benign paroxysmal positional vertigo (BPPV) through Video Head Impulse Test (vHIT). METHODS 150 patients suffering for the first time from posterior canal BPPV were studied. Posterior canal vestibulo ocular reflex (VOR) gain was analysed through stimulations in right anterior-left posterior and left anterior-right posterior planes before treatment, immediately after resolution of the acute stage and one month later. Results were compared with a group of 100 healthy individuals. RESULTS No significant difference between the study the control groups was observed, except for normalised asymmetry ratio of the posterior canal which was significantly higher in the study group. VOR gains of both affected posterior canals and contralateral healthy posterior canals were not significantly correlated with the VOR gain of ipsilateral and contralateral anterior canals. CONCLUSIONS vHIT does not seem to represent an essential tool to study typical posterior canal BPPV in patients affected by this disease for the first time. Different results might be expected in relapsing forms, non-responsive forms, long lasting forms, or atypical variants in which major damage could be provoked by the persistence of otoconia in the canal or by its complete or partial jam.
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Affiliation(s)
- Luigi Califano
- San Pio Hospital, Department of Audiology and Phoniatrics, Benevento, Italy
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13
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Castellucci A, Malara P, Martellucci S, Botti C, Delmonte S, Quaglieri S, Rebecchi E, Armato E, Ralli M, Manfrin ML, Ghidini A, Asprella Libonati G. Feasibility of Using the Video-Head Impulse Test to Detect the Involved Canal in Benign Paroxysmal Positional Vertigo Presenting With Positional Downbeat Nystagmus. Front Neurol 2020; 11:578588. [PMID: 33178119 PMCID: PMC7593380 DOI: 10.3389/fneur.2020.578588] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 09/07/2020] [Indexed: 12/19/2022] Open
Abstract
Positional downbeat nystagmus (pDBN) represents a relatively frequent finding. Its possible peripheral origin has been widely ascertained. Nevertheless, distinguishing features of peripheral positional nystagmus, including latency, paroxysm and torsional components, may be missing, resulting in challenging differential diagnosis with central pDBN. Moreover, in case of benign paroxysmal positional vertigo (BPPV), detection of the affected canal may be challenging as involvement of the non-ampullary arm of posterior semicircular canal (PSC) results in the same oculomotor responses generated by contralateral anterior canal (ASC)-canalolithiasis. Recent acquisitions suggest that patients with persistent pDBN due to vertical canal-BPPV may exhibit impaired vestibulo-ocular reflex (VOR) for the involved canal on video-head impulse test (vHIT). Since canal hypofunction normalizes following proper canalith repositioning procedures (CRP), an incomplete canalith jam acting as a "low-pass filter" for the affected ampullary receptor has been hypothesized. This study aims to determine the sensitivity of vHIT in detecting canal involvement in patients presenting with pDBN due to vertical canal-BPPV. We retrospectively reviewed the clinical records of 59 consecutive subjects presenting with peripheral pDBN. All patients were tested with video-Frenzel examination and vHIT at presentation and after resolution of symptoms or transformation in typical BPPV-variant. BPPV involving non-ampullary tract of PSC was diagnosed in 78%, ASC-BPPV in 11.9% whereas in 6 cases the involved canal remained unidentified. Presenting VOR-gain values for the affected canal were greatly impaired in cases with persistent pDBN compared to subjects with paroxysmal/transitory nystagmus (p < 0.001). Each patient received CRP for BPPV involving the hypoactive canal or, in case of normal VOR-gain, the assumed affected canal. Each subject exhibiting VOR-gain reduction for the involved canal developed normalization of vHIT data after proper repositioning (p < 0.001), proving a close relationship with otoliths altering high-frequency cupular responses. According to our results, overall vHIT sensitivity in detecting the affected SC was 72.9%, increasing up to 88.6% when considering only cases with persistent pDBN where an incomplete canal plug is more likely to occur. vHIT should be routinely used in patients with pDBN as it may enable to localize otoconia within the labyrinth, providing further insights to the pathophysiology of peripheral pDBN.
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Affiliation(s)
- Andrea Castellucci
- ENT Unit, Department of Surgery, Azienda USL - IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Pasquale Malara
- Audiology and Vestibology Service, "Centromedico Bellinzona", Bellinzona, Switzerland
| | | | - Cecilia Botti
- ENT Unit, Department of Surgery, Azienda USL - IRCCS di Reggio Emilia, Reggio Emilia, Italy.,PhD Program in Clinical and Experimental Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | - Silvia Delmonte
- ENT Unit, Department of Surgery, Azienda USL - IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Silvia Quaglieri
- ENT Unit, Policlinico San Matteo Fondazione (IRCCS), Pavia, Italy
| | | | - Enrico Armato
- ENT Unit, "SS Giovanni e Paolo" Hospital, Venice, Italy
| | - Massimo Ralli
- Head and Neck Department, ENT Clinic, Policlinico Umberto I, Rome, Italy.,Department of Sense Organs, Sapienza University of Rome, Rome, Italy
| | | | - Angelo Ghidini
- ENT Unit, Department of Surgery, Azienda USL - IRCCS di Reggio Emilia, Reggio Emilia, Italy
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