Clinical Report: Reassessing the Lying-Down Test for HC-BPPV
Overview
This study evaluates the diagnostic performance of the lying-down test (LDT) for horizontal canal benign paroxysmal positional vertigo (HC-BPPV), finding a positive rate of 60.3% and high side-determination accuracy of 96.7%. The LDT is proposed as a reliable and well-tolerated alternative to the supine roll test.
Background
Benign paroxysmal positional vertigo (BPPV) is a common vestibular disorder that can significantly impact patients' quality of life. Accurate diagnosis is crucial for effective management, particularly for HC-BPPV, which poses unique challenges in eliciting characteristic nystagmus. The supine roll test (SRT) is the current gold standard, but its limitations highlight the need for alternative diagnostic tools like the LDT.
Data Highlights
Measure
Result
LDT Positive Rate
60.3%
First LDT Positive Rate
44.5%
Side-Determination Accuracy
96.7%
Key Findings
The overall positive rate of LDT was 60.3%.
Side-determination accuracy of LDT was 96.7%.
Older age (≥60 years) was an independent predictor of positive LDT response in canalithiasis HC-BPPV (OR = 2.245).
In canalithiasis patients, the fLDT-positive group required fewer diagnostic steps than the fLDT-negative group (z = −4.138, p < 0.001).
Shorter latency and greater intensity of nystagmus were associated with positive fLDT in canalithiasis patients.
Clinical Implications
The LDT may serve as a valuable adjunct to the supine roll test in diagnosing HC-BPPV, particularly for older patients. Its high accuracy and tolerability could enhance patient comfort and diagnostic efficiency in clinical settings.
Conclusion
The LDT is a reliable diagnostic tool for HC-BPPV, with significant implications for clinical practice. Further research is warranted to explore its full potential in diagnosing this condition.
