• World Neurosurg · Oct 2021

    Dry Mouth Caused by Facial Nerve Ischemia Due to Subarachnoid Hemorrhage: An Experimental Study.

    • Ramazan Paşahan, Ahmet Yardım, Mehmet Kürşat Karadağ, Aslıhan Alpaslan, and Mehmet Dumlu Aydın.
    • Department of Neurosurgery, Faculty of Medicine, Inonu University, Malatya, Turkey. Electronic address: r.pasahan@hotmail.com.
    • World Neurosurg. 2021 Oct 1; 154: e488-e494.

    ObjectiveParasympathetic network damage results in facial nerve damage, sublingual ganglion degeneration, sublingual gland dysfunction, and dry mouth. In this study, subarachnoid hemorrhage (SAH) was considered to be the cause of dry mouth.MethodsWe assessed 23 hybrid rabbits, including 5 control (group 1, Control). One milliliter of serum saline was injected into the cisterna magna of 5 animals (group 2). SAH was induced by injecting 1 mL of autologous blood into the cisterna magna of 13 animals (group 3). The animals were killed after 3 weeks of induction. The animals' sublingual ganglion and sublingual gland were excised for histopathological examination. The number of degenerated cells in the sublingual ganglion, secretory vesicles, and secretory granules in the sublingual gland that contain salivary components were estimated using Sequential Window Acquisition of All Theoretical Mass Spectra data analysis. The values were compared by the Mann-Whitney U-test.ResultsThe numbers of secretory vesicles in the sublingual gland were 5.3 ± 1.1 × 103 (group 1), 4.23 ± 0.45 × 103 (group 2), and 1.56 ± 0.22 × 103 (group 3); the numbers of secretory vesicles containing saliva in the sublingual gland were 324 ± 12.18 (group 1), 263 ± 36.23 (group 2), and 114 ± 23.14 (group 3); and the numbers of degenerated cells in the sublingual ganglion were 11 ± 3/mm3 (group 1), 98.43 ± 15.54/mm3 (group 2), and 346 ± 12.28/mm3 (group 3) (P < 0.05).ConclusionsClinical findings in infection and diseases such as Sjögren syndrome, aseptic meningitis, and SAH are similar. However, until now, SAH has not been demonstrated experimentally to cause dry mouth. Discovering that SAH might cause dry mouth might prevent unnecessary use of antibiotics and decrease morbidity due to the wrong or late diagnosis.Copyright © 2021 Elsevier Inc. All rights reserved.

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