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Caloric tests in clinical practice in benign paroxysmal positional vertigo
Jingtao Bi1,2, Bo Liu1,2, Yi Zhang1,2
1a Department of Otolaryngology Head and Neck Surgery , Beijing Tongren Hospital, Capital Medical University , Beijing , China.
Caloric tests reveal that over half of benign paroxysmal positional vertigo patients have abnormal canal paresis. This finding impacts treatment planning and predicts a higher recurrence rate for these patients.
Area of Science:
- Otolaryngology
- Neurology
- Vestibular System Disorders
Background:
- The diagnostic and prognostic value of caloric tests in benign paroxysmal positional vertigo (BPPV) remains uncertain.
- Understanding these tests is crucial for managing BPPV patients effectively.
Purpose of the Study:
- To investigate the characteristics and clinical importance of caloric tests in patients diagnosed with BPPV.
- To correlate caloric test results with treatment outcomes and recurrence rates in BPPV.
Main Methods:
- A prospective study involving 2192 participants (256 with BPPV, 1936 without) experiencing dizziness.
- All subjects underwent caloric testing; 213 BPPV patients were followed for at least six months post-canalith repositioning procedures (CRPs).
Main Results:
- Abnormal canal paresis (CP) was detected in 57% of BPPV patients.
- The cure rate after a single CRP decreased over time and was significantly lower in patients with abnormal CP (54.1%) versus normal CP (70.1%) at six months.
- BPPV patients with abnormal CP exhibited a significantly higher recurrence rate (25.2%) compared to those with normal CP (12.5%).
Conclusions:
- Abnormal canal paresis in BPPV patients necessitates more treatment sessions and is associated with increased relapse risk.
- Caloric testing is valuable for guiding BPPV treatment strategies and predicting disease recurrence.
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