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Hanaei S, Maroufi SF, Sadeghmousavi S, Nejati A, Paeinmahalli A, Ohadi MAD, Teo C. Telovelar vs. Transvermian approach for the fourth ventricle tumors: A systematic review and meta-analysis. Clin Neurol Neurosurg 2024; 240:108259. [PMID: 38579552 DOI: 10.1016/j.clineuro.2024.108259] [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: 01/28/2024] [Revised: 03/01/2024] [Accepted: 03/23/2024] [Indexed: 04/07/2024]
Abstract
BACKGROUND Tumors in the fourth ventricle can be critical due to the small size of the fourth ventricle, which causes symptoms to be detected even in the presence of lesser mass effects. A proper surgical approach to the fourth ventricle poses challenges due to its deep location and proximity to vital compartments within the brainstem. The two commonly used approaches to these tumors are the transvermian and telovelar approaches. METHODS A comprehensive systematic study was conducted based on a literature search of the databases. All case controls, cohorts, and case series including patients with fourth ventricle tumors, who were operated on with either telovelar or transvermian approaches were considered eligible. The evaluated outcomes were comparative postoperative complications of the telovelar vs. transvermian approach. After screening and data extraction, a meta-analysis was performed whenever adequate quantitative data were available. RESULTS Seven studies with a total number of 848 patients, discussed both telovelar and transvermian approaches, with comparative reporting of outcomes in each group. Postoperative outcomes including cranial nerve deficit, mutism, diplopia, CSF leak, need for CSF diversion, and postoperative gait disturbance were not significantly different between telovelar and transvermian approaches. CONCLUSION Postoperative complications were not significantly different between telovelar and transvermian approaches. Moreover, it could be proposed that such complications would be more likely to be a multifactorial matter concerning the patient's clinical condition, tumor characteristics, and surgeon's experience, rather than the surgical approach alone.
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Affiliation(s)
- Sara Hanaei
- Department of Neurosurgery, Imam Khomeini Hospital Complex (IKHC), Tehran University of Medical Sciences (TUMS), Tehran, Iran; Borderless Research, Advancement, and Innovation in Neuroscience Network (BRIANet), Tehran, Iran.
| | - Seyed Farzad Maroufi
- Department of Neurosurgery, Imam Khomeini Hospital Complex (IKHC), Tehran University of Medical Sciences (TUMS), Tehran, Iran; Neurosurgical Research Network, Universal Scientific Education and Research Network (USERN), Tehran, Iran.
| | - Shaghayegh Sadeghmousavi
- Borderless Research, Advancement, and Innovation in Neuroscience Network (BRIANet), Tehran, Iran; Neurosurgical Research Network, Universal Scientific Education and Research Network (USERN), Tehran, Iran.
| | - Arshia Nejati
- Department of Neurosurgery, Imam Khomeini Hospital Complex (IKHC), Tehran University of Medical Sciences (TUMS), Tehran, Iran.
| | - Abolfazl Paeinmahalli
- Department of Neurosurgery, Imam Khomeini Hospital Complex (IKHC), Tehran University of Medical Sciences (TUMS), Tehran, Iran; Borderless Research, Advancement, and Innovation in Neuroscience Network (BRIANet), Tehran, Iran.
| | - Mohammad Amin Dabbagh Ohadi
- Department of Neurosurgery, Imam Khomeini Hospital Complex (IKHC), Tehran University of Medical Sciences (TUMS), Tehran, Iran.
| | - Charles Teo
- Centre for Minimally Invasive Neurosurgery, Sydney, Australia; Department of Neurosurgery, NUH, Singapore, Singapore; Department of Neurosurgery, FJD University Hospital, Madrid, Spain; Department of Neurosurgery, Hanoi Medical University, Viet Nam.
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Soltani M, Nejati A, Marashi SM, Nili F, Yaseri M, Mokhtari Azad T. Diverse Expression Patterns of EBV Oncogenes ( LMP2A, EBV-Encoded microRNA, and EBV-encoded dUTPase) in EBV Associated Gastric Carcinoma and their Association with Viral Loads. Arch Razi Inst 2023; 78:643-649. [PMID: 37396720 PMCID: PMC10314258 DOI: 10.22092/ari.2022.359408.2415] [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] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 09/04/2022] [Indexed: 07/04/2023]
Abstract
The chromogenic in situ hybridization (CISH) test is the gold standard for detecting Epstein-Barr virus (EBV)-associated gastric carcinoma (GC). Real-time (RT) PCR method is also a sensitive test that can detect the viral load in samples. As such, three EBV oncogenes were investigated in this study. RNA extraction and cDNA synthesis were performed on GC tissues of nine patients, who were previously confirmed to have EBVGC subtype. In addition, 44 patients that had positive RT-PCR but negative CISH results were also included as the control group. TaqMan RT-PCR analysis was performed to determine the expression of EBV-encoded microRNAs, and the expression of EBV-encoded dUTPase, as well as LMP2A, was analyzed by SYBR Green RT-PCR. EBV-encoded microRNAs and LMP2A were identified in 2 out of 9 (22%) EBVGC subtypes. In addition, EBV-encoded dUTPase was detected in 4 out of 9 (44.5%) EBVGC subtypes. EBV-encoded dUTPase was also expressed in a sample of the control group. The expression of LMP2A, EBV-encoded microRNAs, and EBV-encoded dUTPase viral oncogenes in patients with high EBV viral loads indicates that these expressions correlate with viral loads. Our findings indicate that the EBV-encoded dUTPase gene may have a role in EBVGC patients' non-response to treatment and might be considered a Biomarker-targeted therapy.
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Affiliation(s)
- M Soltani
- Virology Department, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - A Nejati
- Virology Department, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - S M Marashi
- Virology Department, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - F Nili
- Department of Pathology, Imam Khomeini hospital complex, Tehran University of Medical Sciences, Tehran, Iran
| | - M Yaseri
- Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - T Mokhtari Azad
- Virology Department, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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Rose H, Nejati A, Müller H. Magnetic C c/C s-corrector compensating for the chromatic aberration and the spherical aberration of electron lenses. Ultramicroscopy 2018; 203:139-144. [PMID: 30553616 DOI: 10.1016/j.ultramic.2018.11.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 11/17/2018] [Accepted: 11/23/2018] [Indexed: 11/16/2022]
Abstract
Aberration correction in transmission electron microscopy has proven feasible and useful over a large range of acceleration voltages. The spherical aberration has been corrected for beam energies from 15 kV [1] up to 1.2 MeV [2] while the correction of the chromatic aberration has been achieved for beam energies ranging from 20 kV[3] up to 300 kV[4]. Above this threshold the conventional correction principle based on mixed electric and magnetic focusing elements becomes infeasible with present technology [5]. For conventional electron sources at high voltages the relative energy width of the beam gets so small that chromatic correction becomes less important. Nevertheless, for new applications with pulsed electron sources with energy spreads in the order of 100 eV chromatic aberration will become a limiting factor even at high energies [6]. To enable chromatic aberration correction for such systems a novel type of a feasible, purely magnetic multipole aberration corrector with curved optic axis is proposed which is capable of compensating for the chromatic and spherical aberration up to several MeV.
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Affiliation(s)
- H Rose
- Ulm University, Meyerhofstr. 27, D-89081 Ulm, Germany.
| | - A Nejati
- CEOS GmbH, Englerstr. 28, D-69126 Heidelberg, Germany.
| | - H Müller
- CEOS GmbH, Englerstr. 28, D-69126 Heidelberg, Germany.
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Garoussi MT, Mehrzad J, Nejati A. Investigation of persistent infection of bovine viral diarrhea virus (BVDV) in Holstein dairy cows. Trop Anim Health Prod 2018; 51:853-858. [PMID: 30535897 DOI: 10.1007/s11250-018-1765-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 11/25/2018] [Indexed: 11/25/2022]
Abstract
The aim of this study was to investigate the persistent infection (PI) of bovine viral diarrhea virus (BVDV) along with its coexistence between BVDV antibody titer and BVD virus in blood of Holstein dairy cows. Only large commercial farms (each contained < 1000-3000 unvaccinated cows) were included. There were 11 dairy cattle herds. They included nearly 20,000 dairy cows. Totally, 140 cows, > 3 months to almost 10 years old, were randomly sampled. Indirect enzyme-linked immunosorbent assay (ELISA) and reverse transcription-polymerase chain reaction (RT-PCR) were used to detect BVDV antibody and virus, respectively. The percent positivity (PP) < 14 and ≥ 14 values are interpreted negative and positive, respectively. Simultaneously, whole blood samples pooled in groups of 10 animals were used for molecular detection of BVDV. The results revealed that 138 (98.56%) out of 140 cows were positive for BVDV antibody, while the BVDV antigen was detected only in 2 (1.42%) cows, which were negative for BVDV antibody and so were considered as persistent infection (PI) cows. They were also retested 3 weeks apart. Since the results showed the strong coexistence between seropositivity and BVD virus, in the infected dairy cattle herds, the combination of simple ELISA and pooled whole blood RT-PCR strategy could be an achievable approach to detect PI animals.
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Affiliation(s)
- M T Garoussi
- Department of Theriogenology, Faculty of Veterinary Medicine, University of Tehran, Tehran, 14155-6453, Iran.
| | - J Mehrzad
- Section of Immunology, Department of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - A Nejati
- Section of Theriogenology, Department of Clinical Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
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Shirsavar R, Nasiri M, Amjadi A, Nejati A, Sobhani SO, Habibi M. Rotation induced by uniform and non-uniform magnetic fields in a conducting fluid carrying an electric current. RSC Adv 2016. [DOI: 10.1039/c6ra24346k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
External magnetic field induces controllable rotation in a conducting fluid carrying an electric current.
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Affiliation(s)
- R. Shirsavar
- Department of Physics
- Faculty of Science
- University of Zanjan
- Zanjan
- Iran
| | - M. Nasiri
- Department of Physics
- Faculty of Science
- University of Zanjan
- Zanjan
- Iran
| | - A. Amjadi
- Department of Physics
- Sharif University of Technology
- Tehran
- Iran
| | - A. Nejati
- Physikalisches Institut and Bethe Center for Theoretical Physics
- Universität Bonn
- Germany
| | - S. O. Sobhani
- Department of Physics
- Sharif University of Technology
- Tehran
- Iran
- Department of Energy Engineering
| | - Mehdi Habibi
- Condensed Matter National Laboratory
- IPM
- Tehran
- Iran
- Institute of Physics
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Nejati A, Khalaj S, Azizkhani R, Shahryarian S, Kolahdouzan M, Hossein MS. Evaluating validity of clinical criteria for requesting chest X-rays in trauma patients referred to emergency room. Adv Biomed Res 2012; 1:22. [PMID: 23210081 PMCID: PMC3507021 DOI: 10.4103/2277-9175.98125] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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] [Received: 12/25/2011] [Accepted: 02/23/2012] [Indexed: 12/01/2022] Open
Abstract
Background: Our goal was to identify the clinical criteria for requesting the chest X-ray in patients with blunt trauma and whether its findings such as clinical signs with a high sensitivity could be used to codify the final criteria. Materials and Methods: 386 patients with multiple trauma or blunt chest trauma examined by a physician and the injury mechanism, vital signs, O2 saturation, auscultation findings, abrasions and ecchymosis, crepitation, tenderness on palpation, and pain on lateral compression were noted. The physician's clinical judgment on the necessity of a chest X-ray was also noted in a questionnaire. After taking the X-ray, a digital photo was taken and showed to a radiologist to report any significant chest injury. Data were collected and the positive and negative predictive values, sensitivity and specificity were estimated. Results: 350 males (90.9%) and 35 females (9.1%) with the mean age of 47.1 ± 15.5 years old were evaluated. Falling down (37.7%) was the major mechanism of injury and chest pain (48%) the first complaint of patients. In 87.3% of the chest X-rays, there was no abnormal finding. Among several pathological findings in the chest X-rays, hemothorax, and rib fracture (each with 3.4% prevalence) had a higher prevalence. Tenderness on palpation with clinical judgment had a higher sensitivity about 95% and higher specificity about 100% in crepitation detected. Conclusion: Results showed the combination of positive chest pain and tachypnea in the patients could identify a significant chest injury with 100% sensitivity. More studies on this issue are warranted.
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Affiliation(s)
- A Nejati
- Department of Emergency Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Moharari RS, Soleymani HA, Nejati A, Rezaeefar A, Khashayar P, Meysamie AP. Evaluation of morning report in an emergency medicine department. Emerg Med J 2011; 27:32-6. [PMID: 20029004 DOI: 10.1136/emj.2008.067256] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Morning report is considered as an important educational tool in different branches of medicine. The purpose of the present study was to examine the method of case selection, the leadership, the participant's satisfaction and the educational value of morning report held in our centre. METHOD In September 2007, a formal feedback about the morning report was provided by questionnaire surveys. The data on the method of case selection, the leadership, the participant's satisfaction and the educational value of the sessions were collected from the residents, medical students and the academic staff in emergency medicine department. Each questionnaire also contained an open-ended question, asking for the responders' suggestions for improving these sessions. RESULTS 73.2% of the responders were satisfied with the current model of the conference hall. The data showed that 46.3% of the participants believed these sessions are held for giving the medical team the required information and 65.9% for solving the patient's problems. The data showed that the participants had evaluated the presentation strategy to be good; however, the presentation pattern was reported to be traditional and based on differential diagnosis in 53.7% of the cases and modern problem oriented in only 39%. CONCLUSION Most participants considered morning report sessions held in our hospital to be effective in the way it is; however, issues such as communication skill, emergency department management, critical thinking, ethics, professionalism and evidence-based medicine should also be added to the sessions.
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Affiliation(s)
- R S Moharari
- Research and Development Center, Sina Hospital, Imam Khomeini St, Tehran 11367, Iran.
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Moharari RS, Khademhosseini P, Espandar R, Soleymani HA, Talebian MT, Khashayar P, Nejati A. Intra-articular lidocaine versus intravenous meperidine/diazepam in anterior shoulder dislocation: a randomised clinical trial. Emerg Med J 2008; 25:262-4. [DOI: 10.1136/emj.2007.051060] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Khalaj S, Nejati A, Moharari R, Narenjbon S, Abbasian A. 149: Effect of Advanced Cardiac Life Support Courses on General Practitioners Working in EDs in Iran. Ann Emerg Med 2008. [DOI: 10.1016/j.annemergmed.2008.01.117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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