Jingtao Bi1,2, Bo Liu1,2, Yi Zhang1,2, Jinping Duan1,2, Qian Zhou1,2. 1. a Department of Otolaryngology Head and Neck Surgery , Beijing Tongren Hospital, Capital Medical University , Beijing , China. 2. b Beijing Institute of Otolaryngology, Key Laboratory of Otolaryngology Head and Neck Surgery (Capital Medical University) , Ministry of Education , Beijing , China.
Abstract
Background: The value of caloric tests in benign paroxysmal positional vertigo (BPPV) patients is unclear. Objectives: To analyze the features and clinical significance of caloric tests in BPPV patients. Materials and methods: About 2192 patients (256 BPPV and 1936 non-BPPV) who complained of dizziness triggered by movement, accompanied by the symptom of hearing loss or a history of vertigo, participated in this prospective clinical study. All subjects received a caloric test, 213 BPPV patients underwent follow-up for at least 6 months after canalith repositioning procedures (CRPs). Results: (1) The abnormal canal paresis (CP) prevalence of BPPV was 57%. (2) The curative rate of single CRP decreased during follow-up from 90.1% after 7 days to 61% after 6 months and was significantly lower in patients with (54.1%) than in those without (70.1%) an abnormal CP at 6 months post-treatment (p = .01). (3) The recurrent rate was significantly higher in BPPV patients with abnormal CP (25.2%) than with normal CP (12.5%; p = .017). Conclusions and significance: Patients with abnormal CP needed more CRPs and were more prone to relapse. The value of the caloric test in treatment planning and predicting recurrence in BPPV patients should be emphasized.
Background: The value of caloric tests in benign paroxysmal positional vertigo (BPPV) patients is unclear. Objectives: To analyze the features and clinical significance of caloric tests in BPPVpatients. Materials and methods: About 2192 patients (256 BPPV and 1936 non-BPPV) who complained of dizziness triggered by movement, accompanied by the symptom of hearing loss or a history of vertigo, participated in this prospective clinical study. All subjects received a caloric test, 213 BPPVpatients underwent follow-up for at least 6 months after canalith repositioning procedures (CRPs). Results: (1) The abnormal canal paresis (CP) prevalence of BPPV was 57%. (2) The curative rate of single CRP decreased during follow-up from 90.1% after 7 days to 61% after 6 months and was significantly lower in patients with (54.1%) than in those without (70.1%) an abnormal CP at 6 months post-treatment (p = .01). (3) The recurrent rate was significantly higher in BPPVpatients with abnormal CP (25.2%) than with normal CP (12.5%; p = .017). Conclusions and significance: Patients with abnormal CP needed more CRPs and were more prone to relapse. The value of the caloric test in treatment planning and predicting recurrence in BPPVpatients should be emphasized.