ABSTRACT
Objective:To understand the occurrence of horizontal semicircular canal functional impairment in patients with common vestibular diseases and to explore the characteristics and clinical value of different evaluation methods of horizontal semicircular canal. Methods:From July 2013 to December 2016, patients who attended the vertigo clinic of the First Affiliated Hospital of Dalian Medical University and completed more than three horizontal semicircular canal function tests were retrospectively analyzed. A total of 396 patients diagnosed as vestibular migraine ï¼VMï¼, Ménière's disease ï¼MDï¼, benign paroxysmal positional vertigo ï¼BPPVï¼, vestibular neuritis ï¼VNï¼ and 104 patients with unknown diagnosis were enrolled. The results of caloric test ï¼CTï¼, rotation test ï¼RTï¼, head-shaking nystagmus test ï¼HSNï¼ and video head impulse test ï¼vHITï¼ were collected and the abnormal detection rates of different detection methods were calculated. The sensitivity, specificity and coincidence rate of various detection methods were statistically analyzed using CT as the gold standard. Results:â The abnormal rates of the four evaluation methods from high to low were HSN, CT, RT, vHIT ï¼51.20%, 50.80%, 25.76%, 19.74%, respectivelyï¼; â¡Taking CT as the gold standard, among these four common vestibular diseases, the sensitivity and specificity of vHIT were 0.13-0.41 and 0.69-1.00, the sensitivity and specificity of HSN were 0.44-0.76 and 0.29-0.69, and the sensitivity and specificity of RT were 0.25-0.45 and 0.50-0.84;â¢According to statistical analysis, only HSN and CT results showed no statistically significant difference in the 4 diseases. There was no significant difference between RT and CT in VM and BPPV, and vHIT and CT in BPPV. Conclusion:The abnormal rate of HSN results in common vestibular diseases is highest, and it could be recommended as a routine vestibular function screening item. The specificity of vHIT is highest and worthy of promotion. CT is still an irreplaceable method to evaluate the function of horizontal semicircular canal.
Subject(s)
Migraine Disorders , Vestibular Diseases , Benign Paroxysmal Positional Vertigo , Head Impulse Test , Humans , Retrospective Studies , Semicircular CanalsABSTRACT
The shelf life of chestnut rose beverage is largely dependent on packaging method and storage temperature. In this study, we investigated the effects of packaging beverages in bottles made of either polyethylene terephthalate (PET) or PEN (polyethylene naphthalate)/PET and storage temperature (4, 25, 37, and 55 â) on the shelf life of chestnut rose beverage. The physicochemical parameters and enzyme activity of beverages were evaluated, and we found that at 4 °C, the vitamin C, superoxide dismutase, and total polyphenol contents of beverages stored in PEN/PET bottles increased by 9.95 ± 0.49%, 2.86 ± 0.13%, and 3.23 ± 0.09% respectively, compared to beverages in ordinary PET bottles. In addition, other characteristic indicators including total soluble solids, browning index, and color value were also significantly improved. A shelf-life model was established based on the Arrhenius equation, and it will help distributors and consumers to determine the storage time and optimal shelf life of chestnut rose beverage.
