Article ; Online: Video Head Impulse Test Demonstrates a Residual Function after Plugging of Dehiscent Superior Semicircular Canal.
2023 Volume 44, Issue 3, Page(s) 252–259
Abstract: Objective: Plugging a symptomatic dehiscent superior semicircular canal (SSCC) often leads to a nonfunctional postoperative canal. However, in some instances, a residual function has been described. This study attempts to describe what factors may lead ... ...
| Abstract | Objective: Plugging a symptomatic dehiscent superior semicircular canal (SSCC) often leads to a nonfunctional postoperative canal. However, in some instances, a residual function has been described. This study attempts to describe what factors may lead to such residual function. Study design: Retrospective study. Setting: Tertiary referral center. Patients: Thirty-five patients with confirmed SSCC dehiscence. Intervention: Video head impulse test was conducted pre- and postoperatively to assess any difference in the function of the SSCC. Main outcome measures: Mean gain and pathological saccades were recorded according to well-established thresholds along with dehiscence length and location to evaluate any associations to residual canal function. Results: When comparing preoperative to postoperative SSCC abnormal gains, a significant increase was observed after plugging ( p = 0.023). This also held true when abnormal gain and pathologic saccades were taken together ( p < 0.001). Interestingly, 55.3% of patients were observed to remain with a residual SSCC function 4 months postoperatively even with a clinical improvement. Of these, 47.6% had normal gain with pathologic saccades, 38.1% had an abnormal gain without pathologic saccades, and 14.3% had normal gain without pathologic saccades (normal function). Preoperatively, SSCC abnormal gain was associated with a larger dehiscence length mean ( p = 0.002). Anterosuperior located dehiscences were also associated with a larger dehiscence length mean ( p = 0.037). A residual SSCC function after plugging was associated with a shorter dehiscence length regardless of location ( p = 0.058). Conclusion: Dehiscence length and location may be useful in predicting disease symptomatology preoperatively and canals function recovery after plugging. These factors could be used as indicators for preoperative counseling and long-term management. |
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| MeSH term(s) | Humans ; Head Impulse Test ; Retrospective Studies ; Otologic Surgical Procedures ; Semicircular Canals ; Saccades |
| Language | English |
| Publishing date | 2023-01-08 |
| Publishing country | United States |
| Document type | Journal Article |
| ZDB-ID | 2036790-9 |
| ISSN | 1537-4505 ; 1531-7129 |
| ISSN (online) | 1537-4505 |
| ISSN | 1531-7129 |
| DOI | 10.1097/MAO.0000000000003794 |
| Database | MEDical Literature Analysis and Retrieval System OnLINE |
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