Abstract
Background
This study aimed to analyse the association between the degree of pneumatization of mastoid air cells (MACs) and postoperative complications after microvascular decompression in hemifacial spasm.
Methods
We retrospectively reviewed 308 patients with hemifacial spasm who underwent surgery at our institute between January 2017 and March 2021. The degree of pneumatization of MACs was classified into four grades (grades 1, 2, 3, and 4) according to method of Han et al. The clinical data of the four grades were analysed and statistically examined.
Results
There were no statistically significant differences between the four grades in terms of the operative time, intraoperative blood loss, and postoperative hospital stay (all, P > 0.05). The incidence of hearing loss was higher in grade 4 MACs (26.56%) than in grades 1 and 2 MACs (5.41% and 2.89%, respectively; P < 0.05). The incidence of facial paralysis was higher in grade 4 MACs (28.13%) than in grades 1 and 2 MACs (5.41% and 9.18%, respectively; P < 0.001). The incidence of intracranial infection was higher in grade 3 MACs (17.65%) than in grade 2 MACs (3.89%) (P < 0.05). All four patients with cerebrospinal fluid leakage belonged to grade 4 MACs. The incidence of cerebrospinal fluid leakage was higher in grade 4 MACs (5.13%) than in grade 2 MACs (P < 0.05).
Conclusions
This study found that the degree of pneumatization of MACs was closely related to the postoperative complications after MVD surgeries. Well-pneumatized MACs increase the risk of cerebrospinal fluid leakage and intracranial infection. However, insufficient exposure increases the risk of facial paralysis and hearing loss. For patients with well-pneumatized MACs, sufficient surgical exposure is the top priority when locating the bone hole. For those who may have a latent MAC opening, preventive occlusion should be considered.
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Data availability
The datasets generated during and analysed during the current study are available from the corresponding author on reasonable request.
Abbreviations
- MACs:
-
Mastoid air cells
- HFS:
-
Hemifacial spasm
- MVD:
-
Microvascular decompression
- CT:
-
Computed tomography
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Contributions
Jianxin Zhou and Yan Zhan contributed to conception and designed research; Li Jiang, Quanhong Shi, and Bo-Deng organized the database and performed the statistical analysis; Jianxin Zhou wrote the first draft of the manuscript; Yan Zhan was responsible for final revision; and Yanfeng Xie, Quanhong Shi, Bo Deng, and Li Jiang wrote the sections of the manuscript. All authors read and approved the final manuscript.
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Ethical approval was waived by the Local Ethics Committee of The First Affiliated Hospital of Chongqing Medical University in view of the retrospective nature of the study, and all the procedures being performed were part of the routine care.
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All patients provided written informed consent to undergo the procedures. The data are anonymous, and the requirement for informed consent was therefore waived.
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The authors declare no competing interests.
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This article is part of the Topical Collection on Functional Neurosurgery—Movement disorders
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Zhou, J., Shi, Q., Jiang, L. et al. Association study of the pneumatization degree of mastoid air cells and postoperative complications after microvascular decompression in hemifacial spasm. Acta Neurochir 164, 1543–1550 (2022). https://doi.org/10.1007/s00701-022-05155-4
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DOI: https://doi.org/10.1007/s00701-022-05155-4