A Quantitative Study of the Head Pitching Test for Lateral Canal BPPV.
| Autor: | Califano L; Audiology and Phoniatrics Department, San Pio Hospital, Benevento., Martellucci S; ENT Department, Santa Maria Goretti Hospital, Azienda USL Latina, Italy., Melillo MG; Audiology and Phoniatrics Department, San Pio Hospital, Benevento. |
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| Jazyk: | angličtina |
| Zdroj: | Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology [Otol Neurotol] 2024 Sep 01; Vol. 45 (8), pp. e607-e613. Date of Electronic Publication: 2024 Jul 25. |
| DOI: | 10.1097/MAO.0000000000004256 |
| Abstrakt: | Objectives: Lateral semicircular canal BPPV (LSC-BPPV) is diagnosed with the Head Yaw Test (HYT) by observing nystagmus direction and comparing the nystagmus intensity on both sides according to Ewald's laws. Head Pitching Test (HPT) is a diagnostic maneuver performed in the upright position by bending the patient's head forward (bowing) and backward (leaning) and observing the evoked nystagmus. We aimed to assess the sensitivity of HPT in correctly diagnosing LSC-BPPV through the quantitative measurement of Bowing and Leaning nystagmus slow-phase velocity (SPV). Methods: One hundred cases of LSC-BPPV were prospectively enrolled. HPT was performed, looking for pseudospontaneous, bowing, and leaning nystagmus. HYT was considered for the "final diagnosis." HPT was defined as "diagnostic" if the nystagmus was present in at least one position, "undiagnostic" if no nystagmus was detectable. The direction and the SPV of nystagmus in all positions were analyzed and compared to determine the degree of agreement between HPT and HYT. Outcomes: Sixty-four geotropic and 36 apogeotropic forms were diagnosed. HPT was diagnostic in 80 cases, with no difference between the two forms. According to Ewald's laws, the direction of stronger nystagmus evoked by HPT agreed with the HYT results in 39/52 (75%) cases in geotropic forms and 21/28 (75%) cases in apogeotropic forms. The agreement between HPT and HYT was "substantial" considering all the cases and "almost complete" considering only the patients with diagnostic HPT. Conclusion: Quantitative HPT is a valid test in diagnosing the affected side and form of LSC-BPPV, even if less reliable than HYT. Competing Interests: The authors declare no conflict of interest. (Copyright © 2024, Otology & Neurotology, Inc.) |
| Databáze: | MEDLINE |
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