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Tram Anh D, Takakura H, Nakazato A, Morita Y, Shojaku H. Long-term effects of middle ear pressure therapy with the EFET01 device in patients with Ménière's disease and delayed endolymphatic hydrops in Japan. Acta Otolaryngol 2023; 143:840-844. [PMID: 37995205 DOI: 10.1080/00016489.2023.2284336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 11/05/2023] [Indexed: 11/25/2023]
Abstract
BACKGROUND Long-term efficacy of middle ear pressure therapy (MEPT) with the EFET01 device in patients in Japan with definitive Ménière's disease (MD) and delayed endolymphatic hydrops (DEH) was evaluated. OBJECTIVE To examine the effects of reducing vertigo attacks and improving hearing of MD and DEH patients by using MEPT with the EFET01 device for two years after treatment. MATERIAL AND METHODS A retrospective study was conducted of 32 MD patients and 2 DEH patients treated by MEPT with the EFET01 device from December 2018 to April 2021. According to Japan Society for Equilibrium Research (JSER) guidelines, patients were investigated for the frequency of vertigo attacks and change in hearing levels during a period of 6 months before to 18-24 months after start of treatment. RESULTS The frequency of vertigo attacks significantly decreased in both MD and DEH patients, and hearing level has remained stable in the majority of our patients after treatment. CONCLUSION Our study clarified that MEPT with the EFET01 device was effective in controlling vertigo symptoms of MD and DEH. It should be considered a safe option for patients failing medical treatment. SIGNIFICANCE The efficacy of MEPT with the EFET01 was shown over a 2-year follow-up period.
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Affiliation(s)
- Do Tram Anh
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medicine, Academic Assembly, University of Toyama, Toyama, Japan
| | - Hiromasa Takakura
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medicine, Academic Assembly, University of Toyama, Toyama, Japan
| | - Akira Nakazato
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medicine, Academic Assembly, University of Toyama, Toyama, Japan
| | - Yuka Morita
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medicine, Academic Assembly, University of Toyama, Toyama, Japan
| | - Hideo Shojaku
- Department of Collaborative Research Laboratory of Medical Device Innovation, Faculty of Medicine, University of Toyama, Toyama, Japan
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Tram Anh D, Takakura H, Nakazato A, Shojaku H. Monitoring pressure changes in the inner ear induced by middle ear pressure therapy with an EFET01 device in guinea pigs. Acta Otolaryngol 2023; 143:655-661. [PMID: 37537955 DOI: 10.1080/00016489.2023.2242404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 07/24/2023] [Indexed: 08/05/2023]
Abstract
BACKGROUND As a low-cost, portable, handheld air pressure generation tool not requiring a ventilation tube, the EFET01 device has shown clinical effectiveness for intractable Ménière's disease (MD) patients in Japan. However, no animal studies have investigated changes in inner ear pressure (PI) when applying this device. OBJECTIVE To determine the PI properties in response to middle ear pressure therapy (MEPT) induced by the EFET01 in guinea pigs. MATERIAL AND METHODS In seven healthy guinea pigs, bi-phasic pressure pulses from -5 to 12 cm H2O were delivered to the external ear canal and transmitted to the middle and inner ear cavities with an intact tympanic membrane. Hydrostatic pressure change in the inner ear perilymphatic compartment was measured by a servo-controlled micropipette system. RESULTS From eight successful ears, pressure changes in the middle ear slightly decreased and were instantly transferred to the inner ear. The EFET01 produces a bi-phasic positive/negative pressure pulse, which is approximately twice as large as the monophasic pressure pulse. CONCLUSION Our study clarified the EFET01's ability to transmit pressure and verified its effectiveness in MD patients as observed in clinical studies. SIGNIFICANCE The PI properties in guinea pig response to MEPT with the EFET01 device were investigated.
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Affiliation(s)
- Do Tram Anh
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medicine, Academic Assembly, University of Toyama, Toyama, Japan
| | - Hiromasa Takakura
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medicine, Academic Assembly, University of Toyama, Toyama, Japan
| | - Akira Nakazato
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medicine, Academic Assembly, University of Toyama, Toyama, Japan
| | - Hideo Shojaku
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medicine, Academic Assembly, University of Toyama, Toyama, Japan
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Anh VNQ, Van Ba N, Anh DT, Ung ND, Hiep NH, Ly VT, Hang DTT, Sy BT, Chinh HD, Ky LM, Phong VT, Luu NK, Trung NT, Son HA, Van Luong H, Thuan ND, Tung NT, Tho HH. Validation of a Highly Sensitive qPCR Assay for the Detection of Plasma Cell-Free Epstein-Barr Virus DNA in Nasopharyngeal Carcinoma Diagnosis. Cancer Control 2021; 27:1073274820944286. [PMID: 32726136 PMCID: PMC7658724 DOI: 10.1177/1073274820944286] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Quantification of plasma cell-free Epstein Barr virus DNA (cf EBV DNA) has been suggested as a promising liquid biopsy assay for screening and early detection of nasopharyngeal carcinoma (NPC). However, the diagnostic value of this assay is currently not known in the population of Vietnam, one of the countries which contributed the most to the NPC cases. Herein, we have reported a highly sensitive quantitative polymerase chain reaction (qPCR)-based assay targeting cf EBV DNA for the detection of NPC. A standard curve with linear regression, R2 = 0.9961 (range: 25-150 000 copies/mL) and a detection limit of 25 copies/mL were obtained using an EBV standard panel provided by the Chinese University of Hong Kong. The clinical performance of this assay was assessed using plasma samples obtained from 261 Vietnamese individuals. The optimized qPCR assay detected cf EBV DNA in plasma with a sensitivity of 97.4% and a specificity of 98.2%. The absolute quantitative results of pretreatment cf EBV DNA and patient overall clinical stages were statistically correlated (P < .05). In summary, the remarkably high sensitivity and specificity of our optimized qPCR assay strongly supports the wide use of cf EBV DNA quantification as a routine noninvasive method in early diagnosis and management of patients with NPC.
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Affiliation(s)
- Vu Nguyen Quynh Anh
- Department of Genomics and Cytogenetics, Institute of Biomedicine & Pharmacy, Vietnam Military Medical University, Hanoi, Vietnam
| | - Nguyen Van Ba
- Oncology Centre, 103 Military Hospital, Vietnam Military Medical University, Hanoi, Vietnam
| | - Do Tram Anh
- ENT Department, 103 Military Hospital, Vietnam Military Medical University, Hanoi, Vietnam
| | - Nguyen Dinh Ung
- Department of Genomics and Cytogenetics, Institute of Biomedicine & Pharmacy, Vietnam Military Medical University, Hanoi, Vietnam
| | - Nguyen Hoang Hiep
- Department of Genomics and Cytogenetics, Institute of Biomedicine & Pharmacy, Vietnam Military Medical University, Hanoi, Vietnam
| | - Vu Thi Ly
- Department of Genomics and Cytogenetics, Institute of Biomedicine & Pharmacy, Vietnam Military Medical University, Hanoi, Vietnam
| | - Dinh Thi Thu Hang
- Institute of Biomedicine & Pharmacy, Vietnam Military Medical University, Hanoi, Vietnam
| | - Bui Tien Sy
- Department of Microbiology, 108 Military Central Hospital, Hanoi, Vietnam
| | - Hoang Dao Chinh
- Department of Oncology and Radiation, 108 Military Central Hospital, Hanoi, Vietnam
| | - Le Minh Ky
- Oncology and Head & Neck Surgery Centre, Vietnam National ENT Hospital, Hanoi, Vietnam
| | - Vu Truong Phong
- Oncology and Head & Neck Surgery Centre, Vietnam National ENT Hospital, Hanoi, Vietnam
| | - Nguyen Kim Luu
- Department of Radiation, 103 Military Hospital, Vietnam Military Medical University, Hanoi, Vietnam
| | | | - Ho Anh Son
- Institute of Biomedicine & Pharmacy, Vietnam Military Medical University, Hanoi, Vietnam
| | - Hoang Van Luong
- Institute of Biomedicine & Pharmacy, Vietnam Military Medical University, Hanoi, Vietnam
| | - Nghiem Duc Thuan
- ENT Department, 103 Military Hospital, Vietnam Military Medical University, Hanoi, Vietnam
| | - Ngo Thanh Tung
- Department of Head & Neck Cancer and Radiation Oncology, Vietnam National K Hospital, Hanoi, Vietnam
| | - Ho Huu Tho
- Department of Genomics and Cytogenetics, Institute of Biomedicine & Pharmacy, Vietnam Military Medical University, Hanoi, Vietnam
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