Horizontal Semicircular Canal Benign Paroxysmal Positional Vertigo Research Articles

Gufoni maneuver for treatment of horizontal canal benign paroxysmal positional vertigo: a systematic review of randomized controlled trials.

This review aims to investigate the effects of theGufoni maneuver on horizontal semicircular canal benign paroxysmal positional vertigo (HC-BPPV). A comprehensive search, including PubMed, PEDro, REHABDATA, SCOPUS, EMBASE, and Web of Science, was conducted to determine randomized clinical trials (RCTs) studying the effects of the Gufoni maneuver for HC-BPPV from inception to March 1, 2024. The quality of the included studies was estimated using the Physiotherapy Evidence Database (PEDro) scale. Ten randomized controlled trials (RCTs) were included in this review with a total of 1025 HC-BPPV patients (mean age = 58.58 years; 63% female; 55% right-side HC-HBPPV; 49% geotropic HC-BPPV). The included RCTs ranged from 4 to 9 out of 10 (median = 6.5) on the PEDro scale. The included studies showed that the Gufoni maneuver revealed efficacy when compared to the sham maneuver but not when compared to other maneuvers such as the Barbecue roll maneuver, the Appiani maneuver, the Mastoid oscillation, the head shaking, and the modified Gufoni maneuver. The Gufoni maneuver is considered an option for treating patients with geotropic or apogeotropic HC-BPPV. Precise diagnosis of the BPPV, the subtype of HC-BPPV, symptom duration, history of previous BPPV attacks, the applied methods of maneuver and the proficiency of the clinician performing the maneuver, proper diagnosis, presence of any underlying health conditions are critical for successful treatment. Further studies are strongly warranted.

Discussion and analysis the value of supine median³ nystagmus in the diagnosis and treatment of HC-BPPV

Objective:To explore the clinical value of supine median³ nystagmus in the accurate diagnosis of horizontal semicircular canal benign paroxysmal positional vertigo（HC-BPPV）. Methods:A total of 187 patients with HC-BPPV admitted to the First Affiliated Hospital of Xi'an Jiaotong University from June 2020 to March 2021 were selected. Among them 42 cases of Cupulolithiasis and 145 cases of Canalithiasis. The nystagmus parameters of patients left and right supine position and supine median³ position were recorded in detail by RART. According to the direction of supine median³ nystagmus, patients were divided into three groups: group A（nystagmus to weak side）, group B（nystagmus to strong side）, group C（negative nystagmus）. The canalith repositioning manoeuvres（CRM） was carried out by utility of an automatic vestibular function diagnosis and therapy system（SRM-IV）. The cure rate of CRM in three groups of HC-BPPV patients was compared, Multivariate logistic regression analysis was performed to analyze the influencing factors of CRM for HC-BPPV. Results:The cure rates of group A, group B and group C were 81.58%, 16.13% and 56.25%, respectively. The difference among the three groups was statistically significant. Then a pairwise comparison of group A, B and C, the difference was statistically significant（χ²A-B=40.294,P<0.001,χ²B-C=14.528, P<0.001,χ²A-C=11.606, P=0.001）; the results of multivariate logistic regression analysis showed that the direction of supine median³ nystagmus and BMI were the influencing factors of CRM for HC-BPPV. Conclusion:The direction, intensity and duration of supine median³ nystagmus play an important role in determining the responsibility semicircular canal of HC-BPPV.

Tỷ lệ và phân loại chóng mặt tư thế kịch phát lành tínhống bán khuyên ngang tại Bệnh viện Quân y 175

Objective: To determine the prevalence of benign paroxysmal positional vertigo (BPPV) in the horizontal semicircular canal and classify the mechanism at Military Hospital 175.Methods: A cross-sectional study conducted at the Department of Neurology, Military Hospital 175, from March 2022 - September 2023, patients were examined and performed positioning tests on the videonystagmography system. Patients with atypical results were examined with imaging and the HINT test. Patients with BPPV were included in the analysis.Results: 466 cases were diagnosed with BPPV. 133 patients had horizontal semicircular canal BPPV, accounting for 28.54% of BPPV cases. In the group of 133 patients with horizontal semicircular canal BPPV, 116 cases were due to otoliths in the semicircular canal (canalithiasis), accounting for 87.22%; 14 cases were due to otoliths on the cupula (cupulothiasis), accounting for 10.53%; 3 cases were due to light cupula mechanism, accounting for 2.26%.Conclusion: The prevalence of horizontal semicircular canal BPPV was 28.54% in BPPV patients, higher than other previous studies in Europe. 87.22% of horizontal semicircular canal BPPV were hii due to stones in the semicircular canal, 10.53% were due to stones in the semicircular canal and 2.26% were due to light cupula mechanism. Performing a positioning head roll test in addition to the Dix-Hallpike test is necessary to avoid missing horizontal semicircular canal BPPV.

The Light Cupula Phenomenon: A Scoping Review.

Direction-changing positional nystagmus (DCPN), which refers to the change in the direction of nystagmus with different head positions, is a well-known characteristic of horizontal semicircular canal BPPV. The supine head roll test is commonly used to diagnose horizontal canal BPPV. However, persistent geotropic DCPN observed during this test cannot be explained by the conventional explanations of canalolithiasis or cupulolithiasis. To account for this unique nystagmus, the concept of a "light cupula" has been recently introduced. In this review, we provide an overview of the historical background, clinical features and diagnostic methods, proposed mechanisms, and treatment strategies associated with the light cupula phenomenon based on the available literature to date.

Early treatment for benign paroxysmal positional vertigo secondary to sudden sensorineural hearing loss.

Sudden sensorineural hearing loss (SSNHL) accompanied by benign paroxysmal positional vertigo (BPPV) is relatively common in the clinic. There are unified standards for the treatment of primary BPPV with good reduction effect, while there are few studies on the treatment of BPPV secondary to SSNHL within 1 week of onset. The study was to investigate the treatment of BPPV secondary to SSNHL and compare its manual reduction with that of primary BPPV. We selected 90 patients with BPPV accompanied by SSNHL within a week of onset and 210 primary BPPV patients at Hebei Provincial Eye Hospital from June 2020 to December 2022. The former group was divided into the medicine group and manual reduction plus medicine group. The medicines used were extract of Ginkgo biloba leaves injection, betahistine hydrochloride injection and oral prednisone. We contrasted the efficacy respectively for posterior semicircular canal BPPV (psc-BPPV), horizontal semicircular canal BPPV (hsc-BPPV) and multiple semicircular canal BPPV (msc-BPPV). In addition, we compared the manual reduction effect for primary BPPV and manual reduction group, and the evaluation of efficacy are the intensity of nystagmus and the clinical symptoms. In the secondary BPPV group, there was no difference in efficacy between the medicine group and manual reduction group at the 7th-day after reduction for psc-BPPV, hsc-BPPV, and msc-BPPV (P > .05). The immediate effect of reduction was significantly different between the primary BPPV group and the group with SSNHL and BPPV for both psc-BPPV and hsc-BPPV (P < .05), and the effect of the primary BPPV group was better, but it was no difference for msc-BPPV (P > .05). For the treatment of BPPV accompanied by SSNHL within 1 week of onset, the additional reduction therapy showed no benefit, so we need to apply medication for SSNHL.

Characteristics and Possible Mechanisms of Direction-Reversing Nystagmus During Positional Testing in Patients With Benign Paroxysmal Positional Vertigo.

The occurrence of direction-reversing nystagmus during positional testing in patients with benign paroxysmal positional vertigo (BPPV) is not uncommon. Further in-depth analysis of the characteristics and possible mechanisms of direction-reversing nystagmus will help us to diagnose and treat BPPV more precisely. The study aimed to analyze the incidence and characteristics of direction-reversing nystagmus during positional testing in BPPV patients, evaluate the outcomes of canalith repositioning procedure for these patients, and further explore the possible mechanism of reversal nystagmus in BPPV patients. Retrospective study. Single-center study. A total of 575 patients with BPPV who visited the Vertigo Clinic of our hospital between April 2017 and June 2021 were enrolled. Dix-Hallpike and supine roll tests were performed. The nystagmus was recorded using videonystagmography. The characteristics of direction-reversing nystagmus and the possible underlying mechanism were analyzed. Patients with BPPV who showed reversal nystagmus accounted for 9.39% (54 of 575) of all BPPV patients visiting our hospital during the same period, of which 5.57% (32 of 575) had horizontal semicircular canal BPPV (HC-BPPV), and 3.83% (22 of 575) had posterior semicircular canal BPPV (PC-BPPV). The maximum slow-phase velocities (mSPVs) of the first-phase nystagmus were greater in HC-BPPV and PC-BPPV patients with reversal nystagmus than those without ( p = 0.04 and p = 0.01, respectively). In all HC-BPPV and PC-BPPV patients with reversal nystagmus, the mSPV of the first-phase nystagmus was greater than that of the second-phase nystagmus ( p < 0.01). The duration of the second-phase nystagmus was longer than 60 seconds in 93.75% (30 of 32) of the HC-BPPV patients and 77.27% (17 of 22) of the PC-BPPV patients ( p = 0.107, Fisher exact test). HC-BPPV and PC-BPPV patients with reversal nystagmus both required more than one canalith repositioning procedure compared with those without (HC-BPPV: 75 versus 28.13%, p < 0.001; PC-BPPV: 59.09 versus 13.64%, p = 0.002). The cause of second-phase nystagmus in BPPV patients with direction-reversing nystagmus may be related to the involvement of central adaptation mechanisms secondary to the overpowering mSPV of the first-phase nystagmus.

Light Cupula: Recent Updates

Benign paroxysmal positional vertigo (BPPV) is the most common cause of positional vertigo and nystagmus. Direction-changing positional nystagmus (DCPN), which refers to the change in the direction of nystagmus with different head positions, is a well-known characteristic of horizontal semicircular canal BPPV. The supine head roll test is commonly used to diagnose horizontal canal BPPV. However, persistent geotropic DCPN observed during this test cannot be explained by conventional mechanisms of canalolithiasis or cupulolithiasis. The concept of a “light cupula” has been proposed to account for this unique nystagmus. In this review, we summarize the historical background, clinical features and diagnostic methods, presumed mechanisms, and treatment approaches of the light cupula phenomenon based on the available literatures up to date.

Design and analysis of HSC-BPPV diagnostic maneuver based on virtual simulation.

The preferred supine roll test for the diagnosis of horizontal semicircular canal BPPV has several disadvantages, including difficulty in locating the affected ear, inconsistent nystagmus performance on repeated testing, and lack of a typical latency period, resulting in insensitive diagnosis. To investigate novel diagnostic techniques with more scientific design, more accessible application, and better diagnostic sensitivity and specificity. Based on clinical microscopic CT data, we created a virtual simulation model of BPPV using Unity software. The physical simulation of the traditional supine roll test was performed to observe and analyse the movement of the otoliths, whose initial position was the typical stable position. In addition, the normal vectors of the plane and crista ampullaris of the horizontal semicircular canal were measured using 3D Slicer software. Based on this, we analyzed the critical steps for designing diagnostic maneuvers for BPPV in the horizontal semicircular canal. For a more accurate diagnosis of horizontal semicircular canal BPPV, it is critical to rotate the horizontal semicircular canal to be parallel to gravity. It is also necessary to move the otolith by swinging the head. As a result, we developed two diagnostic maneuvers: the 60° roll test and the prone roll test. We also performed simulations to observe otolith movement and predict nystagmus performance. The 60° roll test and the prone roll test can complement the supine roll test. Compared to the supine roll test, they not only effectively differentiate canalolithiasis from cupulolithiasis, but also make it easier to determine the position of the otoliths, and the characteristics of the nystagmus are more pronounced. Significant diagnostic features have significant potential benefits for home and telemedicine.

Effects of age and involved semicircular canals on the caloric test in patients with primary horizontal semicircular canal benign paroxysmal positional vertigo

Objective:To investigate the effects of age and involved semicircular canals on the results of caloric test in patients with primary horizontal semicircular canal benign paroxysmal positional vertigo（BPPV）. Methods:A total of 258 patients conforming to the diagnosis of primary horizontal semicircular canal BPPV were selected as the case group, and another 110 non-BPPV patients with dizziness/vertigo as the main complaint were selected as the control group. Both groups were divided into elderly group and young and middle-aged group according to their age, and the general information and the results of the caloric test were compared and analyzed for each group. Results: ①There was no statistically significant difference in gender composition and type of involved semicircular canal between the different age groups（P>0.05）；②In patients with horizontal semicircular canal canalolithiasis, there was no statistically significant difference in the rate of abnormal caloric test results between the different age groups（P>0.05）；③In patients with horizontal semicircular canal cupulolithiasis, there was a statistically significant difference in the rate of abnormal caloric test results between the different age groups（P<0.05）；④In the same age group, there was no statistically significant difference in the rate of abnormal caloric test results between the patients with horizontal semicircular canal canalolithiasis and the patients with cupulolithiasis（P>0.05）；⑤In the control group, there was no statistically significant difference between the different age groups in gender composition（P>0.05）；⑥In the control group, there was a statistically significant difference in the rate of abnormal caloric test results between the different age groups（P<0.05）；⑦Among the patients in the same age group, there was no statistically significant difference in the age distribution between the case and control groups（P>0.05）；⑧In patients of the same age group, there was no statistically significant difference in the rate of abnormal caloric test results between the case and control groups（P>0.05）. Conclusion:The involvement of the semicircular canal does not affect the results of the caloric test, but age can affect the results, especially in BPPV patients with horizontal semicircular canal cupulolithiasis.

Insights into Benign Paroxysmal Positional Vertigo in the Elderly

Vertigo, the illusion of movement of oneself or one’s surroundings in the absence of actual movement, is a common symptom in older adults and, as such, is commonly regarded as an age-related normal or part of the aging process itself, as its incidence increases with age. In neurology and otorhinolaryngology, benign paroxysmal positional vertigo (BPPV) is the most common cause of vertigo. BPPV is a brief, recurrent episode of vertigo caused by changes in head position relative to the direction of gravity. The symptoms of peripheral vestibular disease are vertigo and characteristic nystagmus. The prevalence of undiagnosed BPPV is high due to the fact that many elderlies tolerate vertigo symptoms. According to etiology, it can be subdivided into idiopathic BPPV and secondary BPPV, and according to location, it can be subdivided into posterior semicircular canal BPPV, horizontal semicircular canal BPPV, and anterior semicircular canal BPPV.

An analyzation on the characterization of frequency tuning of vestibular evoked myogenic potential in patients with unilateral vestibular hypofunction

Objective: To explore the value of adding 1 kHz cervical vestibular evoked myogenic potential（cVEMP） and ocular vestibular evoked myogenic potential（oVEMP） in the auxiliary diagnosis of unilateral vestibular hypofunction. Methods:A retrospective analysis of 84 patients with unilateral vestibular hypofunction receiving two or more vestibular function tests was conducted,29 cases of unilateral Ménière's disease, 27 cases of benign paroxysmal positional vertigo （BPPV）, 8 cases of idiopathic sudden sensorineural hearing loss （ISSHL） with vertigo, and 20 cases of ISSHL without vertigo were included. SPSS 25.0 software was used for statistical analysis to observe the difference of frequency amplitude ratio （FAR） at 500 Hz/1 kHz of cVEMP and oVEMP between the experimental and control groups. Results:①The cVEMP elicitation rates were 95.24% （80/84） and 98.81% （83/84） for 500 Hz and 1 kHz, respectively; and the oVEMP elicitation rates were 78.57% （66/84） and 91.67% （77/84） for 500 Hz and 1 kHz, respectively. ②Except for the lateral difference of FAR in oVEMP of the posterior semicircular canal BPPV group and cVEMP of the horizontal semicircular canal BPPV group （P<0.05）, no significant lateral difference was observed in the other disease groups （P>0.05）. Conclusion:In patients with unilateral vestibular hypofunction, cVEMP and oVEMP showed different frequency tuning changes in different semicircular canal BPPV groups. Additionally, 1 kHz cVEMP and oVEMP as regular stimulation frequencies in clinical test, which has certain clinical reference significance for determining the diagnosis and prognosis of BPPV on the weak ear and in different semicircular canal involvement.

Effect of dynamic balance during the onset of benign paroxysmal positional vertigo on residual dizziness after successful repositioning: a multicenter prospective cohort study

Objective: To explore the characteristics of dynamic balance during the onset of benign paroxysmal positional vertigo (BPPV) and its prediction of residual symptoms after successful repositioning. Methods: From January 2018 to August 2019, patients diagnosed with unilateral posterior semicircular canal or horizontal semicircular canal BPPV were consecutively enrolled from five otolaryngology clinics in Shanghai. The dynamic balance function was measured by sensory organization test (SOT) before repositioning maneuver, and the residual symptoms and its duration were followed up from one week to up to three months. Results: A total of 260 patients were recruited. After excluding 17 cases, 243 cases were successfully followed up including 89 males and 154 females, with an average age of (52.9±13.0) years. There were 175 cases of posterior semicircular BPPV, 61 cases of horizontal semicircular BPPV and 7 cases of canal conversion (from horizontal to posterior semicircular). Among 243 patients, 118 cases reported residual symptoms, with an incidence of 48.6%. The results of SOT showed that 58.0%(141/243) of the patients had abnormal vestibular input and 41.6%(101/243) were categorized as "near falls". With respect to the detailed residual symptoms, 47 cases (39.8%) reported unsteadiness or floating, 35 cases (29.7%) had fogginess/heaviness feeling, 22 cases (18.6%) had transient dizzy while head moving, and 15 cases (12.7%) reported that the symptom was too subtle to describe. Compared with the group without residual symptoms, the group with residual symptoms had more abnormal vestibular input(χ²=67.25, P<0.001) and near falls(χ²=74.78, P<0.001) as identified by SOT test. Cox proportional hazards regression failed to reveal any SOT results having significantly impact on the duration of residual symptoms [abnormal vestibular input (HR= 0.93, 95%CI: 0.48, 1.80), and near falls (HR= 0.90, 95%CI: 0.56, 1.46)]. Kaplan-Meier survival analysis showed that there was no significant difference in the duration of residual symptoms among patients with different SOT manifestations [Log rank (Mantel-Cox) test, P>0.05]. Conclusions: The impaired dynamic balance during the onset of BPPV is characterized by "abnormal vestibular input". The residual symptoms are mainly characterized by unsteadiness or floating feeling. The defect of dynamic balance function is a predictor of the residual symptoms after successful repositioning, but not for the duration of such symptoms.

Nystagmus Parameters of Supine Roll Test Correlates With Prognosis After Repositioning Maneuver in Horizontal Semicircular Canal Benign Paroxysmal Positional Vertigo.

Background: Positional nystagmus induced by supine roll test is characteristic for diagnosing horizontal semicircular canal benign paroxysmal positional vertigo (HC-BPPV). In this study, we aimed to explore the value of nystagmus parameters in by supine roll test (SRT) as prognostic factors in HC-BPPV.Methods: We retrospectively analyzed the nystagmus parameters of 813 patients diagnosed with HC-BPPV by the SRT model in the SRM-IV system through video nystagmography. Then we used the computer-controlled canalith repositioning procedure (CCRP) mode for treatment. Based on the outcomes, patients were divided into either the cured group or the resistant group. The 1:1 propensity score matching (PSM) was applied to minimize potential selection bias. Then univariable and multivariable analyses were performed to identify the association of nystagmus parameters and the efficacy of CCRP.Results: Among the 813 patients, 99 (12.2%) were classified in the resistant group. The right side of HC-BPPV patients was twice the number of the left side patients (537 vs. 276). PSM is used to pair resistant patients to the cured patients, in which 99 pairs were successfully matched. Results of univariate and multivariate analyses showed that patients in the resistant group have longer latency in the affected side [odds ratio (OR) = 1.231 (1.110–1.366); P < 0.001] and slower slow phase velocity (SPV) in the healthy side [OR = 0.957 (0.917–0.999); P = 0.045].Conclusion: Nystagmus parameters may represent the characteristics of canalith. HC-BPPV patients with a longer latency in the affected side and slower SPV on the healthy side during SRT have a higher risk of HC-BPPV persisting after a single CCRP.

Treatment Efficacy of Forced Prolonged Position After Cupulolith Repositioning Maneuver in Apogeotropic HSCC BPPV.

To evaluate the therapeutic efficacy of the forced prolonged position (FPP) in patients with horizontal semicircular canal (HSCC) cupulolithiasis in whom the cupulolith repositioning maneuver (CuRM) failed. Fifty-four consecutive patients with HSCC cupulolithiasis were included, and immediate treatment efficacy of CuRM and short-term treatment efficacy of FPP were investigated. We performed the CuRM in HSCC cupulolithiasis, and, if the CuRM did not show immediate success, instructed the patients to perform the FPP or the sham position (by random allocation) at home. The immediate therapeutic success of the CuRM was assessed by the absence of nystagmus and vertigo on positional testing after 30 minutes of the maneuver, which was 14.8% on the first visit day. And the resolution rate of HSCC cupulolithiasis was higher in the FPP group than in the sham position group at the second (78.3% vs 55.6%), third (75.0% vs 42.9%), and fourth visits (100% vs 25.0%). Although the CuRM has been considered to be a good therapeutic option for HSCC cupulolithiasis because it theoretically aims to detach otoconial particles attached both on the utricle and canal sides of the cupula, the immediate success rate was only 14.8% at the first visit. The FPP can be additionally recommended to improve the resolution rate in HSCC cupulolithiasis patients in whom the CuRM fails.

Lying down nystagmus in horizontal semicircular canal benign paroxysmal positional vertigo (HSC-BPPV)

Objective Determining the lateralizing value of lying-down nystagmus (LDN) in horizontal semicircular canal benign paroxysmal positional vertigo (HSC-BPPV). Methods The authors prospectively investigated LDN in 35 consecutive patients of HSC-BPPV (28 geotropic and 7 apogeotropic variants) attending an Otoneurology Centre in South Rajasthan India over a period of 20 months. Results LDN was present in 45.7% (16/35) patients of HSC-BPPV; 50% in those with geo-HSC-BPPV (14/28), and 28.6% (2/7) with apo-HSC-BPPV. When present, LDN directs contralaterally in 93% of geo-HSC-BPPV (13/14) and ipsilaterally in 100% of apo-HSC-BPPV (2/2). Only in 1 out of the 35 patients (2.9%), LDN was solitarily decisive in lateralizing the affected canal as the supine roll test elicited nystagmus of symmetric strength on the lateral head roll to either side. Conclusion LDN is an important secondary sign of lateralization (SSL) in patients with HSC-BPPV (both geotropic and apogeotropic variants). LDN direction is mainly corroborative, but rarely when the lateral head rolls to either side elicits horizontal positional nystagmus of symmetric strength to either side, it can be solitarily relied on for lateralization.

Immediate and short-term effects of Gufoni and Appiani liberatory maneuver for treatment of ageotropic horizontal canal benign paroxysmal positional vertigo: A prospective randomized trial.

ObjectiveTo examine the treatment effects of repositioning maneuvers with the head turned 45° downwards (Gufoni maneuver) and 45° upwards (Appiani maneuver) in 25 patients with ageotropic horizontal semicircular canal (HSCC) benign paroxysmal positional vertigo (BPPV).MethodsPatients were randomly assigned to the Gufoni or Appiani maneuvers, and their immediate and short‐term efficacy was investigated.ResultsThe immediate treatment response was successful in four of 16 patients who were treated with the Appiani maneuver and were not successful in any of the nine patients treated with the Gufoni maneuver. The patients who showed spontaneous resolution during follow‐up outnumbered the patients who showed resolution of ageotropic HSCC BPPV immediately after the repositioning maneuvers.ConclusionThis study showed a very low immediate resolution rate of ageotropic HSCC BPPV after the Gufoni maneuver; this may be attributed to the less effectiveness of the Gufoni maneuver against debris that often exists in the canal side of the cupula. Another interesting finding was that the rate of spontaneous resolution during the follow‐up period was higher than that of immediate resolution after the repositioning maneuvers, which may support the recently proposed hypothesis that ageotropic positional nystagmus can also be evoked by causes other than the otolithic attachment on the cupula, such as a slight change in the biochemical composition of the inner ear fluids.Level of Evidence3.

A Show of Ewald's Law: I Horizontal Semicircular Canal Benign Paroxysmal Positional Vertigo.

Objective: To evaluate horizontal semicircular canal (HSC) effects according to Ewald's law and nystagmus characteristics of horizontal semicircular canal benign paroxysmal positional vertigo (HSC-BPPV) in the supine roll test.Methods: Patients with HSC-BPPV (n = 72) and healthy subjects (n = 38) were enrolled. Latency, duration, and intensity of nystagmus elicited by supine roll test were recorded using video nystagmography.Results: In patients with HSC-BPPV, horizontal nystagmus could be elicited by right/left head position (positional nystagmus) and during head-turning (head-turning nystagmus), and nystagmus direction was the same as that of head turning. Mean intensity values of head-turning nystagmus in HSC-BPPV patients were (44.70 ± 18.24)°/s and (44.65 ± 19.27)°/s on the affected and unaffected sides, respectively, which was not a significant difference (p = 0.980), while those for positional nystagmus were (40.81 ± 25.56)°/s and (17.69 ± 9.31)°/s (ratio, 2.59 ± 1.98:1), respectively, representing a significant difference (p < 0.0001). There was no positional nystagmus in 49 HSC-BPPV patients after repositioning treatment, nor in the 38 healthy subjects. No significant difference in head-turning nystagmus was detected in HSC-BPPV patients with or without repositioning.Conclusions: The direction and intensity of nystagmus elicited by supine roll test in patients with HSC-BPPV, was broadly consistent with the physiological nystagmus associated with a same HSC with single factor stimulus. Our findings suggest that HSC-BPPV can be a show of Ewald's law in human body.

The Clinical Spectrum of Patients of Horizontal Semicircular Canal Benign Paroxysmal Positional Vertigo Attending an Otoneurology Center in South Rajasthan, India and Their Response to Appropriate Repositioning Maneuvers at a Short-Term Follow-Up

Abstract Introduction This article aims to study the clinical spectrum of 20 consecutive patients diagnosed with horizontal semicircular canal benign paroxysmal positional vertigo (HSC-BPPV) attending an otoneurology center in Udaipur, Rajasthan, India, over a period of 11 months and their response to appropriate repositioning maneuvers evaluated at short-term follow-up of 1 hour and 24 hours. Study Design This is a nonrandomized prospective interventional study. Materials and Methods Twenty patients with unilateral HSC-BPPV were treated with a session of an appropriate repositioning maneuver (Gufoni maneuver or barbecue roll maneuver for the geotropic variant of HSC-BPPV [geo-HSC-BPPV]; Appiani maneuver or barbecue roll maneuver or head-shaking maneuver for the apogeotropic variant of the HSC-BPPV [apo-HSC-BPPV]). Patients were followed up twice (at 1 hour and 24 hours) and audited by a supine roll test with questioning for the absence or presence of concomitant vertigo. Results At the 1-hour follow-up, 78.57% (11/14) patients of geo-HSC-BPPV treated with Gufoni maneuver recovered, and 66.67% (4/6) patients of apo-HSC-BPPV treated with some form of physical therapy recovered. The recovery was maintained at 24 hours’ follow-up in both groups. Conclusion To the best of the author’s knowledge, no such study on patients of HSC-BPPV has been reported from India hitherto. Gufoni maneuver is an effective and safe treatment for the geo-HSC-BPPV with a recovery rate of 78.57% (11/14) at a short-term follow-up. The physical therapy for the apo-HSC-BPPV must be tailored according to the purported site of pathology which cannot be precisely predetermined most of the times.

Use of Vestibular Rehabilitation in the Treatment of Benign Paroxysmal Positional Vertigo

Purpose The purposes of this article are (a) to describe the different test procedures for benign paroxysmal positional vertigo (BPPV) and (b) to provide guidance for the treatment of the various forms of BPPV and to discuss the efficacy of the different interventions. Conclusions While BPPV primarily occurs in the posterior semicircular canal, it is also seen in the anterior and horizontal semicircular canals. There are distinctive patterns of nystagmus that help identify the affected semicircular canal and to differentiate between cupulolithiasis and canalithiasis forms of BPPV. There is reasonable evidence to support the different treatments for both posterior and horizontal semicircular canal BPPV. Anterior semicircular canal BPPV is rare, and as a consequence, there is little evidence to support the various treatment techniques. Finally, while BPPV is generally easy to identify, there are central causes of positional nystagmus with and without vertigo, which can complicate the diagnosis of BPPV. The signs and symptoms of BPPV are contrasted with those of the central causes of positional nystagmus.

Effect of barbecue role and Gufoni maneuvers on quality of life in patients with horizontal semicircular canal benign paroxysmal positional vertigo

&lt;p class="abstract"&gt;&lt;strong&gt;Background:&lt;/strong&gt; Benign paroxysmal positional vertigo (BPPV) is the most common cause in patients with vertigo. Horizontal semi-circular canal BPPV (HSCBPPV) is up to 20% of BPPV. Quality of life (QoL) is significantly impaired by vertigo. Aim of present research was to study the effect and compare barbecue role and Gufoni maneuvers on QoL in patients with HSCBPPV.&lt;/p&gt;&lt;p class="abstract"&gt;&lt;strong&gt;Methods:&lt;/strong&gt; 60 individuals with unilateral HSCBPPV were selected. 2 groups barbecue role and Gufoni were formed and 30 individuals were selected in each group randomly. Vestibular activities and participation (VAP) and positional test were administered before and after barbecue role and Gufoni maneuvers to fulfill the aim. &lt;/p&gt;&lt;p class="abstract"&gt;&lt;strong&gt;Results:&lt;/strong&gt; VAP scale results revealed significant difference between pre and post treatment score in both groups, suggestive of positive effect on quality of life in patients with HSCBPPV. Improvements in VAP score between both groups were compared and significant difference was observed. Positional test post treatment revealed that 83.33% and 70% patients improved in barbecue role and Gufoni respectively.&lt;/p&gt;&lt;p class="abstract"&gt;&lt;strong&gt;Conclusions:&lt;/strong&gt; Barbecue role found to be better than Gufoni in treatment of unilateral HSCBPPV.&lt;/p&gt;