OBJECTIVE: Benign paroxysmal positional vertigo (BPPV) is a common vestibular disorder that causes vertigo. Study of BPPV has dramatically rapid progress in recent years. We analyze the BPPV growth METHOD: We searched the international data quantity year by year in database of PubMed, ScienceDirect and WILEY before 2014 respectively, then we searched the domestic data quantity year by year in database of CNKI, VIP and Wanfang Data before 2015 by selecting "Benign paroxysmal positional vertigo" as the keywords. Then we carried out regression analysis with the gathered results in above databases to determine data growth regularity and main factors that affect future development of BPPV. Also, we analyzes published BPPV papers in domestic and international journals. RESULT: PubMed database contains 808 literatures, ScienceDirect contains 177 database and WILEY contains 46 literatures, All together we collected 1 038 international articles. CNKI contains 440 literatures, VIP contains 580 literatures and WanFang data contains 449 literatures. All together we collected 1 469 domestic literatures. It shows the rising trend of the literature accumulation amount of BPPV. The scattered point diagram of BPPV shows an exponential growing trend, which was growing slowly in the early time but rapidly in recent years. CONCLUSION It shows that the development of BPPV has three stages from international arical: exploration period (before 1985), breakthrough period (1986-1998). The deepening stage (after 1998), Chinese literature also has three stages from domestic BPPV precess. Blank period (before the year of 1982), the enlightenment period (1982-2004), the deepening stage (after the year of 2004). In the pregress of BPPV, many outsantding sccholars played an important role in domestic scitifction of researching, which has produced a certain influence in the worldwide.
Benign Paroxysmal Positional Vertigo ; Bibliometrics ; Databases, Factual ; Humans

OBJECTIVE: To describe and analyze the clinical features of nasal respiratory epithelial adenomatoid hamartom and improve the levels of diagnosis and treatment. METHOD: Fourteen cases of nasal respiratory epithelial adenomatoid hamartom confirmed by pathology were collected and analyzed. RESULT: In 14 cases, primary complaint of Hyposmia(or Anosmia)and nasal obstruction were occured in 13 and 11 cases respectively. Four cases had past history of endoscopic sinus surgery because of the diagnosis of nasal polyps. Polypoid neoplasms could be seen in the bilateral olfactory clefts. Sinus CT showed soft tissue shadows in bilateral nasal cavity and mucous membrane thickening in different sinus. Endoscopic sinus surgery were utilized to eliminate focus in all cases. All cases weren t recurred after 2-20 months' following-up visitings. CONCLUSION Nasal respiratory epithelial adenomatoid hamartom is so rare that clinical and pathological doctors have limited knowledge of it. It has its own characteristics from the clinical symptoms, signs to sinus CT although they are nonspecific. So we should improve the understanding about it to avoid misdiagnosis or missed diagnosis.
Diagnosis, Differential ; Endoscopy ; Hamartoma ; diagnosis ; pathology ; surgery ; Humans ; Nasal Cavity ; Nasal Obstruction ; Nasal Polyps ; Neoplasm Recurrence, Local ; Nose Neoplasms ; diagnosis ; pathology ; surgery ; Paranasal Sinuses

OBJECTIVE: To examine various pneumatized extensions of the sphenoid sinus of Chinese people. METHOD: The sphenoid sinus and its surrounding structures were examined from 100 computed tomography images of the sinus. The type of the sphenoid sinus was classified according to the various extensions of the sinus. RESULT: The type of the sphenoid sinus was classified into the following 6 basic types based on the direction of pneumatization: sphenoid body, lateral, clival, lesser wing, anterior, and combined. CONCLUSION The variations in the extensions of pneumatization of the sphenoid sinus may facilitate entry into areas bordering the sphenoid sinus.
Adult ; Asian Continental Ancestry Group ; Humans ; Sphenoid Bone ; anatomy & histology ; Sphenoid Sinus ; anatomy & histology ; Tomography, X-Ray Computed

OBJECTIVE: To evaluate the necessity of postural restrictions after repositioning maneuvers in posterior canal benign paroxysmal positional vertigo (BPPV). METHOD: Sixty-eight consecutive patients diagnosed of posterior canal BPPV with a positive Dix-Hallpike test. Thirty-two patients were instructed to follow postural restrictions after repositioning maneuvers, and 36 patients did not receive any postural restriction after treatment. All the patients were reevaluated at 1 week and 3 months later respectively. RESULT: There was no statistical difference in number of maneuvers needed to resolve symptoms between two groups. CONCLUSION Epley maneuver is effective to treat patients with posterior canal BPPV, and postural restrictions does not improved the efficacy. Above all, we do not recommend any postural restrictions to patients with posterior canal BPPV.
Adult ; Aged ; Aged, 80 and over ; Benign Paroxysmal Positional Vertigo ; Female ; Humans ; Male ; Middle Aged ; Patient Positioning ; Treatment Outcome ; Vertigo ; therapy

[Abstact] Objective To investigate the characteristics of heart rate variability (HRV) of ambulatory electrocardiogram in patients with acute stroke, and evaluate the predictive value of HRV in stroke prognosis. Methods Eighty-three patients acute stroke (study group) and 83 cases of healthy subjects (control group) from October 2016 to October 2017 in Dalian Municipal Central Hospital Affiliated of Dalian Medical University were selected. The 24 h ambulatory electrocardiogram was performed to determine HRV in 2 groups, including standard deviation of NN intervals (SDNN), standard deviation of the 5 min mean cycle lengths (SDANN), root-mean-square successive difference (RMSSD) and percentage value of NN50 count (PNN50). Results The SDNN, SDANN, RMSSD and PNN50 in study group were significantly lower than those in control group: (80.83 ± 10.52) ms vs. (148.11 ± 22.59) ms, (79.98 ± 8.89) ms vs. (129.35 ± 5.34) ms, (19.28 ± 4.25) ms vs. (39.57 ± 2.38) ms and (5.91 ± 2.12) % vs. (19.35 ± 12.15) %, and there were statistical differences (P＜0.05). Among the 83 patients with acute stroke, there were no statistical differences in SDNN, SDANN, RMSSD and PNN50 between ischemic stroke (54 cases) and hemorrhagic stroke (29 cases) (P＞0.05). The SDNN, SDANN, RMSSD and PNN50 in right stroke (43 cases) were significantly lower than those in left stroke (40 cases): (75.18 ± 2.32) ms vs. (88.12 ± 3.58) ms, (73.36 ± 2.18) ms vs. (85.69 ± 7.29) ms, (17.57 ± 1.67) ms vs. (20.58 ± 4.23) ms and (4.39 ± 1.57) % vs. (8.61 ± 1.12) %, and there were statistical differences (P＜0.05). Patients were followed up for 1 year, 24 died and 59 survived. The SDNN, SDANN, RMSSD and PNN50 in dead patients were significantly lower than those in survived patients: (92.35 ± 4.58) ms vs. (154.37 ± 4.65) ms, (76.23 ± 4.03) ms vs. (143.95 ± 4.34) ms, (7.43 ± 2.12) ms vs. (31.65 ± 1.52) ms and (2.35 ± 0.46) % vs. (11.65 ± 0.48) % , and there were statistical differences (P＜0.05). Conclusions The autonomic nervous function of patients with acute stroke is seriously unbalanced, with increased sympathetic excitability and decreased vagus excitability. The decrease of HRV can easily induce cardiac events and seriously affect the prognosis.