Canal switch after canalith repositioning procedure for benign paroxysmal positional vertigo

Canal switch is a complication following canalith repositioning procedure (CRP) for posterior canal benign paroxysmal positional vertigo (BPPV). Instead of being returned to the utricle, the loose otoconia migrate into the superior or horizontal semicircular canal. Patients remain symptomatic, and treatment can be ineffective unless the switch is recognized and additional repositioning maneuvers directed toward the appropriate semicircular canal are performed. This report provides the first videographic documentation of canal switch involving conversion of unilateral posterior semicircular canal BPPV to geotropic horizontal canalithiasis. Laryngoscope, 2012.     

Variables affecting treatment in benign paroxysmal positional vertigo

OBJECTIVE: To identify variables affecting outcome in patients with benign paroxysmal positional vertigo (BPPV) treated with canalith repositioning maneuvers. STUDY DESIGN: Retrospective review of patients at a tertiary vestibular rehabilitation center. METHODS: Variables identified for statistical analysis included method of diagnosis, age, sex, onset association with trauma, semicircular canal involvement, presence of bilateral disease, treatment visits, and cycles of canalith repositioning maneuvers per treatment visit. Multivariate statistical analysis using Pearson chi2, likelihood ratio, linear-by-linear association, and cross-tabulation tests were performed. RESULTS: Two hundred fifty-nine patients with BPPV who received treatment were identified from 1996 to 1998. Average follow-up time was 16.9 months. 74.8% required one treatment visit, 19.0% required a second treatment visit, and 98.4% were successfully treated after three treatment visits. The remainder required up to seven treatment visits for relief of symptoms. Variables affecting the number of treatment visits included bilateral disease or location of disease other than in the posterior semicircular canal. Patient age, sex, method of diagnosis, and onset association with trauma had no statistically significant impact. CONCLUSION: Patients with benign paroxysmal positional vertigo not located in a single posterior semicircular canal are more likely to require multiple visits for canalith repositioning.     

Effectiveness of treatment techniques in 923 cases of benign paroxysmal positional vertigo

OBJECTIVE: To present treatment effectiveness of 923 consecutive cases of benign paroxysmal positional vertigo (BPPV) using canalith repositioning, liberatory, and log roll maneuvers combined with redistribution exercises. STUDY DESIGN: Retrospective case review. METHODS: Patients presented with either posterior semicircular canal (P-SCC) BPPV or horizontal semicircular canal (H-SCC) BPPV. Diagnosis was based on patient history of transient paroxysmal vertigo and a positive Dix-Hallpike response with either torsional or horizontal nystagmus. Patients with P-SCC BPPV numbered 840, and 83 patients had H-SCC BPPV. In the original study, there were 1,000 patients; however, 77 patients were dropped from the study because of lack of follow-through. Intervention was canalith repositioning, liberatory maneuvers, log roll maneuvers, and redistribution exercises. Patients numbering 607 were treated with canalith repositioning, 233 patients had liberatory maneuvers, and 83 received log roll maneuvers. All patients received redistribution exercises before treatment maneuvers. After intervention, patients were reassessed at 6 months. RESULTS: There were 601 women and 322 men from ages 12 to 94 (median 55) years. The average duration of symptoms before intervention was 30 months. Outcome measures were considered met when symptoms of BPPV had abated and patients demonstrated a negative Dix-Hallpike response. In the repositioning group, 94% of patients were symptom free or improved, 98% in the liberatory maneuver group and 100% in the log roll group. The average number of sessions was three for all groups. Recurrence of symptoms was demonstrated in 140 (16%) patients at 6 months. CONCLUSIONS: Treatment of BPPV can be effective using either repositioning, liberatory, or log roll maneuvers in combination with redistribution exercises.     

氟桂利嗪联合手法复位治疗后半规管原发性良性阵发性位置性眩晕的临床疗效观察

目的探讨氟桂利嗪联合手法复位治疗后半规管原发性良性阵发性位置性眩晕(posterior semicircular canal benign paroxysman positional vertigo,PC-BPPV)的治疗效果。方法对96例原发性PC-BPPV患者随机分为单纯手法治疗(Epley管石复位法)与联合氟桂利嗪进行治疗,观察治疗效果。结果经1次手法复位治疗后症状消失或明显减轻,一次治愈率两组基本相同。治疗4wk后,治疗组的治愈率为高于对照组(P<0.05)。随访3个月,共计有8例患者复发,总复发率为9.6%,其中治疗组为2.2%,对照组为18.4%。结论 Epley手法复位联合氟桂利嗪治疗PC-BPPV疗效显著,复发率低。     

The effect of the canalith repositioning maneuver on resolving postural instability in patients with benign paroxysmal positional vertigo

OBJECTIVE: Patients with benign paroxysmal positional vertigo (BPPV) often experience postural instability as well as brief episodes of vertigo. The purpose of this study was to determine whether successful resolution of the episodic vertigo, through use of the canalith repositioning treatment, would be accompanied by improvement in postural stability. STUDY DESIGN: Prospective clinical study. SETTING: Outpatient tertiary care facility in a university. PATIENTS: Thirty-three patients with a diagnosis of the canalithiasis form of BPPV affecting the posterior canal unilaterally. All patients had complete remission of the positional vertigo after treatment. Patients with abnormal caloric or rotary chair test results were excluded from the study. INTERVENTION: The posterior canal BPPV was treated by the canalith repositioning treatment. MAIN OUTCOME MEASURES: Postural stability was assessed by computerized dynamic posturography before and 1 to 2 weeks after treatment. Six different subtests were used. RESULTS: A significant number of patients had abnormal stability, as measured with computerized dynamic posturography, before treatment. After treatment there was a significant increase in the number of subjects with normal results on the different subtests; however, not all patients had normal postural stability. Younger subjects were more likely to show improved stability. CONCLUSIONS: Treatment of BPPV using the canalith repositioning treatment results in improved postural stability in patients with BPPV. Not all patients have normal stability after treatment, however, and assessment and treatment of the balance problems may be necessary.     

耳石复位法治疗半规管良性阵发性位置性眩晕的临床研究

目的：评价耳石复位法治疗良性阵发性位置性眩晕（BPPV）疗效。方法：回顾分析2002年1月～2005年6月间治疗的230例BPPV患者的临床资料。根据半规管耳石假说,随机分成治疗组122例,对照组108例,分别接受耳石复位法和一般对症治疗。治疗结束后2周复查并评定疗效。结果：治疗组88例眩晕和眼震于治疗后立即或在2周内逐渐消失,18例改善,16例无效,治愈率72．1％,总有效率86．9％。对照组51例立即或在2周内逐渐消失,23例改善,34例无效,治愈率47．2％,总有效率68．5%。两组疗效相比差异有统计学意义。结论：鉴于耳石复位法治疗无明显禁忌证,方法简单,无痛苦和不良反应,一次性治疗疗效高,短期（1～3个月）随访无复发,因此认为该法可作为BPPV门诊治疗的首选方法。     

手法复位治疗良性阵发性位置性眩晕36例

目的 评价体位治疗在良性阵发性位置性眩晕（BPPV）的应用价值。方法 回顾性分析36例原发性或继发性BPPV的临床资料,后半规管BPPV采用改良Epley手法或Semont手法复位,水平半规管采用Barbecue翻滚疗法复位治疗,评价其治疗效果。结果 33例后半规管BPPV患者应用改良Epley手法或Semont手法复位,有效率为93.9%。3例水平半规管BPPV患者采取Barbecue翻滚法复位后症状均明显改善。结论 手法复位治疗良性阵发性位置性眩晕方法简单,疗效可靠,治愈率高。     

不同类型良性阵发性位置性眩晕的诊断和治疗

目的探讨不同类型良性阵发性位置性眩晕（benign paroxysmal positional vertigo，BPPV）的诊断和治疗方法。方法对我科2004年4月-2006年3月就诊的BPPV病人131例．应用红外线视频眼动记录分析变位试验诱发的眼震特点，进行分型、定侧，并采用相应的耳石复位技术治疗。结果（1）后半规管BPPV94例（71．8％），随机分组采用Epley管石复位法和Semont管石解脱法各47例。（2）水平半规管BPPV29例（22．1％），水平向地性眼震者16例，另13例为水平背地性眼震者，自行或采用Gufoni疗法后转换为水平向地性9例，方向不能转换4例。采用barbecue翻滚和／或强迫侧卧体位疗法。（3）前半规管BPPV6例（4．6％），采用Epley管石复位法。（4）混合型BPPV2例（1．5％），行上述相应半规管的疗法。1周后随访总有效率85．5％（112／131），3个月后92.4％（121／131）。结论BPPV的诊断和治疗应根据不同变位试验诱发的眼震特征判别不同半规管及不同发病机理类型，并选择合适的耳石复位技术治疗。     

Persistent Direction-Fixed Nystagmus Following Canalith Repositioning Maneuver for Horizontal Canal BPPV: A Case of Canalith Jam

The authors report a 64-year-old man who developed persistent direction fixed nystagmus after a canalith repositioning maneuver for horizontal canal benign paroxysmal positional vertigo (HC-BPPV). The patient was initially diagnosed with right HC-BPPV given that the Dix-Hallpike test showed geotropic horizontal nystagmus that was more pronounced on the right side, although the roll test did not show any positional nystagmus. The patient was treated with a canalith repositioning maneuver (Lempert maneuver). The next day, the patient experienced a different character of dizziness, and left-beating spontaneous nystagmus regardless of head position was observed. After a forced prolonged left decubitus and frequent head shaking, his symptoms and nystagmus resolved. This condition, referred to as canalith jam, can be a complication after the repositioning maneuver in patients with BPPV. Atypical positional tests suggest that abnormal canal anatomy could be the underlying cause of canalith jam.     

165例良性阵发性位置性眩晕患者管石复位治疗疗效观察

目的评估BPPV患者管石复位治疗短期和长期疗效。方法回顾分析了后半规管和上半规管BPPV患者165例，男53例、女112例，年龄范围18岁至84岁（平均53岁），分为2组，手法复位治疗（治疗组）125例，非手法复位（对照组）40例。结果治疗组中，后半规管BPPV患者81例，上半规管BPPV患者31例，双侧后半规管BPPV13例。65岁以上老年BPPV患者41例。治疗结果分析．治疗组首次治愈83人（66．4％），其中后半规管BPPV60人（74．1％），上半规管BPPV14人（45．2％），双侧后半规管BPPV9人（69．2％），老年BPPV32人（78．0％）。对照组16人（40％）在一周后症状消失。在4个月至41个月的随访中，治疗组和对照组治愈率分别为92％和82．5％。有30人（24％）在随访中复发。有2例病史超过40个月的患者，手法复位治疗无效而进行后半规管阻塞术。结论手法复位治疗BPPV患者是一种非常有效的方法，它能有效的缩短病程，减轻患者痛苦，其方法简单、易行且费用低，可以在临床广泛使用。     

内耳病变并发良性阵发性位置性眩晕

目的了解继发于几种内耳疾病的良性阵发性位置性眩晕（benign paroxysmal positional vertigo，BPPV）的发病情况，进一步了解BPPV的可能发病机制。方法观察眩晕诊疗中心2004年1月至2006年11月53例前庭神经炎、90例突发性聋（包括伴眩晕的突发性聋）、381例梅尼埃病BPPV等的发病情况，并与同期183例原发性BPPV比较。结果4种内耳疾病后可以出现BPPV，分别是前庭神经炎、突发性聋、梅尼埃病和Bell麻痹。前庭神经炎后出现BPPV为9．4％（5／53）；突发性聋后出现BPPV为38．9％（35／90）；梅尼埃病后出现BPPV为0．3％（1／381）；1例Bell麻痹后出现BPPV。其中外半规管BPPV5例；后半规管37例，其中1例后半规管BPPV在复位过程中出现同侧前半规管BPPV。管结石症39例，外半规管嵴顶结石症3例。内耳病变后出现BPPV在发病后半年内出现者占75．0％（27／36）。继发性BPPV的手法复位效果与原发性BPPV相似，大多都可1、2次就诊后治愈。结论内耳病突发性聋、前庭神经炎和梅尼埃病后可以出现BPPV。这种类型的BPPV主要表现为后半规管管结石，偶见外半规管嵴帽结石。原发性BPPV与内耳病变后出现的BPPV手法复位疗效相似。     

同时性后半规管与水平半规管性良性位置性眩晕

目的：探讨同时性后半规管与水平半规管性良性位置性眩晕（混合性良性位置性眩晕）的诊治方法。方法：联合应用Epley手法和Barbecue翻滚法对4例患者进行治疗，两次治疗间隔1d。结果：4例患者眩晕症状完全消失，随访至今无复发。结论：混合性良性位置性眩晕兼有后半规管与水平半规管性良性位置性眩晕的临床表现，联合采用Epley手法和Barbecue翻滚法治疗该病是可行的。     

Clinical features of paroxysmal positional vertigo presenting combined lesions.

Benign paroxysmal positional vertigo (BPPV) is one of the common vestibular disorders. Canalolithiasis is thought to be a likely lesion. A canalith repositioning procedure (CRP by Epley) generally yields good resolution of vertigo and nystagmus. The authors confirmed the efficacy of this procedure on typical BPPV of the posterior semicircular canal type. We designed a new procedure for BPPV of the lateral canal type, which also yielded satisfactory results. BPPV sometimes presents a nystagmus pattern, which suggests multiple lesions. We have seen eight cases of BPPV showing nystagmus that combines both the posterior and the lateral canal types. Combined CRP was performed on these cases, which again gave good clinical results. Other BPPV cases were associated with central lesions. We must be aware that BPPV may involve multiple canals and may be associated with central lesions.     

手法复位治疗良性阵发性位置性眩晕

目的回顾性分析60例良性阵发性位置性眩晕（BPPV）诊断和治疗方法,为提高BPPV疗效提供参考依据。方法60例患者（男34例,女26例）通过常规神经耳科学检查、Dix—Hallpike和滚转试验确诊为BPPV。40例在发病10天内就诊,6N在发病1月内就诊,10例在5月内就诊,4例在6月以上就诊。采用Semont摆动手法、Epley颗粒复位法和Barbecue翻滚疗法治疗。对治疗1次无效者间隔7天重复治疗,重复3次无效者采用其它方法治疗。完成冶疗后2周复查评定疗效。结果后半规管BPPV54例,22例采用Semont手法复位治疗,14例痊愈,4例改善,4例无效。4例无效改用Epley颗粒复位法。Epley颗粒复位法治疗36例,28例痊愈,4例改善,4例无效。6例外半规管BPPV采用Barbecue翻滚疗法治疗4例痊愈,2例无效。40例10天内就诊者治愈32例,8例改善。6例发病1月内就诊者治愈2例,改善4例。10例5月内就诊者4例痊愈,4例改善,2例无效。4例6月以上就诊者治疗3次均无效。46例治疗1次有效,4例患者治疗2次有效,4例患者治疗3次有效。结论手法复位治疗BPPV有效率高,BPPV治疗效果与发病至就诊时间相关。     

突发性聋继发良性阵发性位置性眩晕的临床观察

目的了解继发于突发性聋的良性阵发性位置性眩晕（benign paroxysmal positional vertigo,BPPV）的发病情况并探讨其治疗策略。方法观察眩晕门诊及耳内科病房中心2004年1月-2010年1月收治的210例突发性聋患者（包括伴有眩晕的突发性聋）合并BPPV的发病情况,并与同期183例原发性BPPV相比较。结果本组突发性聋病例并发BPPV为19．0％（40／210）;40例患者均为高频感音神经性聋或平坦型感音神经性聋。本文40例继发于突发性聋的BPPV,出现时间均在突发性聋发病后t周内。继发性BPPV的手法复位效果与原发性BPPV相似,大多数都于1～2次就诊后治愈。结论突发性聋继发的BPPV是临床常见的现象;继发于突聋的BPPV与原发性BPPV都是以后半规管BPPV多见,并与原发性BPPV手法复位的疗效相似。     

Contralateral incipient posterior canal benign positional paroxysmal vertigo: complication after Epley maneuver

Background: Particle repositioning procedures give consistent results for the treatment of benign positional paroxysmal vertigo (BPPV). However, little consideration has been given to the possibilities of bilateral disease. Objective/Hypothesis: To report contralateral symptoms and signs suggestive of revealed or incipient BPPV as a complication of Epley maneuver. Study Design: A prospective cohort of 198 cases over a period of 11 years. Results: Ten (5.0%) developed contralateral symptoms and signs suggestive of revealed or incipient posterior canal BPPV within 2 weeks of treatment. Conclusion: This novel observation has not been previously described and may influence the strategy for future management of patients with BPPV. Particle repositioning maneuvers for the previously asymptomatic contralateral ear may need to be considered in a subset of patients with posterior canal BPPV who suffer contralateral symptoms after undergoing treatment for the original ear.     

Efficacy of postural restriction in treating benign paroxysmal positional vertigo

OBJECTIVE: To investigate the efficacy of postural restriction after canalith repositioning in treating benign paroxysmal positional vertigo (BPPV). DESIGN: Prospective trial of patients with postural restriction vs those without postural restriction after treatment. PATIENTS: Patients with classic BPPV and with BPPV without nystagmus were treated using the modified Epley canalith repositioning procedure. Patients were randomly separated into 2 groups. The first group was instructed to wear a cervical collar and to maintain an upright head position for 2 days. The second group had no motion restriction. After 5 days, the patients were followed up and evaluated using the Dix-Hallpike test. RESULTS: In the first group, 56 of 62 ears healed after the first maneuver, and the remaining ears healed after the second. In the second group, 45 of 57 ears healed after the first maneuver, 6 after the second, and 5 (with subsequent postural restriction) after the third (1 ear did not improve). Five patients in the first group and 3 patients in the second group had BPPV without nystagmus; all of these patients healed after a single maneuver. The difference between the 2 groups in the number of maneuvers required for treatment was statistically significant (P<.05). The number of patients who required a third maneuver was significantly higher in the second group (P<.05). CONCLUSIONS: Postural restriction enhances the therapeutic effect of canalith repositioning in the treatment of posterior semicircular canal BPPV. The long-term efficacy of postural restriction in preventing BPPV recurrence has not been demonstrated.     

颗粒复位法治疗后半规管良性阵发位置性眩晕

目的 评价颗粒复位法治疗良性阵发性位置性眩晕的效果。方法 对１９９６年７月－１９９８年６月间治疗的３１一半规管性良性性位置性眩晕患者进行回顾分析。地规管耳右症假说,患者接受１次颗粒复位法治疗。治疗结束２周后复查并评价疗效。结果 ２１例患者的眩晕和眼一立刻或在１－２周内逐渐消失。６例改善,４例无效。总有效率８７．１％。结论 颗粒复位法对大多数良性阵发性位置性眩晕患者有效,推荐作为治疗该的首选方法。     

Effect of mastoid oscillation on the outcome of the canalith repositioning procedure

OBJECTIVE: The canalith repositioning procedure (CRP), as described by Epley, is a well-established method of treatment for benign paroxysmal positional vertigo (BPPV). Debate exists as to whether simultaneous application of a mastoid oscillator confers any added benefit. The aim of this study was to examine this question. STUDY DESIGN: Prospective randomized study. METHOD: Eighty-four subjects with unilateral posterior canal BPPV were randomized into two groups. The oscillator group was treated by CRP with mastoid oscillation and the nonoscillator group was treated by CRP alone. Positive outcome was regarded as complete resolution of symptoms and a negative Dix-Hallpike's test after a 4 to 6 week follow-up period. RESULTS: Five patients were lost to follow-up. Twenty-eight (72%) patients from the oscillator group and 26 (65%) patients from the nonoscillator group had a positive outcome. This difference was not significant (chi = 0.17, P =.68) CONCLUSION: For the treatment of posterior canal BPPV, concurrent mastoid oscillation with CRP does not significantly alter the short-term outcome.