Scholarlink

Purpose <p>This study aimed to evaluate the diagnostic potential of nystagmus direction observed during bow and lean tests (BLTs) in patients with posterior canal canalolithiasis BPPV (P-BPPV), lateral canal canalolithiasis BPPV (Lca-BPPV), and lateral canal cupulolithiasis BPPV (Lcu-BPPV).</p> Methods <p>A total of 62 patients (40 women, 22 men; aged 24–70 years) with clinically suspected BPPV were enrolled. Diagnoses included 39 cases of P-BPPV, 15 of Lca-BPPV, and 8 of Lcu-BPPV. Each participant underwent the Dix-Hallpike Test (DH), Head Roll Test (HRT), and bow and lean tests for diagnostic assessment. The primary outcome was the presence and direction of nystagmus during BLTs, in relation to BPPV subtype.</p> Results <p>Nystagmus was detected in 77.4% of subjects during the bow test and in 46.8% during the lean test. A statistically significant difference was found in nystagmus direction across BPPV subtypes (<i>p</i> &lt; 0.05). Right-beating horizontal nystagmus during the bow test was significantly more frequent in right-sided Lca-BPPV. Right down-beating torsional nystagmus during the bow test occurred exclusively in left P-BPPV, while left down-beating torsional nystagmus was seen only in right P-BPPV. Right up-beating torsional nystagmus was significantly associated with right P-BPPV, and left up-beating torsional nystagmus with left P-BPPV (<i>p</i> &lt; 0.05).</p> Conclusions <p>In P-BPPV, DH-induced nystagmus direction was opposite in the bow position but matched in the lean position. These findings underscore the diagnostic value of BLTs, particularly the bow test, in identifying the affected canal in posterior and lateral canal BPPV.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The importance of the bow and lean test as an initial positional test for diagnosing BPPV

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年6月14日

查看全文
  • Ercan Karababa,
  • Sanem Can Sarıoğlu,
  • Fatma Ceyda Akın Öçal,
  • Deniz Uğur Cengiz,
  • Mehmet Arslan,
  • Bülent Satar

摘要

Purpose

This study aimed to evaluate the diagnostic potential of nystagmus direction observed during bow and lean tests (BLTs) in patients with posterior canal canalolithiasis BPPV (P-BPPV), lateral canal canalolithiasis BPPV (Lca-BPPV), and lateral canal cupulolithiasis BPPV (Lcu-BPPV).

Methods

A total of 62 patients (40 women, 22 men; aged 24–70 years) with clinically suspected BPPV were enrolled. Diagnoses included 39 cases of P-BPPV, 15 of Lca-BPPV, and 8 of Lcu-BPPV. Each participant underwent the Dix-Hallpike Test (DH), Head Roll Test (HRT), and bow and lean tests for diagnostic assessment. The primary outcome was the presence and direction of nystagmus during BLTs, in relation to BPPV subtype.

Results

Nystagmus was detected in 77.4% of subjects during the bow test and in 46.8% during the lean test. A statistically significant difference was found in nystagmus direction across BPPV subtypes (p < 0.05). Right-beating horizontal nystagmus during the bow test was significantly more frequent in right-sided Lca-BPPV. Right down-beating torsional nystagmus during the bow test occurred exclusively in left P-BPPV, while left down-beating torsional nystagmus was seen only in right P-BPPV. Right up-beating torsional nystagmus was significantly associated with right P-BPPV, and left up-beating torsional nystagmus with left P-BPPV (p < 0.05).

Conclusions

In P-BPPV, DH-induced nystagmus direction was opposite in the bow position but matched in the lean position. These findings underscore the diagnostic value of BLTs, particularly the bow test, in identifying the affected canal in posterior and lateral canal BPPV.