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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Interdisciplinary Journal of Virtual Learning in Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: Information, Communication, Technology, Empowerment, Empowered Employees, Technical &,Vocational Training Organizati
- چکیده:
- چکیده انگلیسی: Introduction: According to capabilities of information and communications technology (ICT) in value creation for organizations, they have substantial investments to use of information and communication technologies. One of the values that the organizations can create by these technologies is employee’s empowerment. Materials and Methods: This study examines the impact of information and communication technologies on empowerment of employees in Technical & Vocational Training Organization in Sistan and Baluchestan. For this purpose and by studying literatures, a questionnaire was designed. After its approval validity by relevant authorities and faculty supervisor and consultants, the questionnaire was distributed among sample society. Collected data were tested using statistical techniques such as Regression (to test hypotheses), Average One-sample t-test to determine the level of empowerment, and Friedman ANOVA test to determine the ranking of each empowerment dimensions. Results: Results indicate that there is a meaningful and positive relationship between use of ICT and employee’s empowerment. In addition, using information and communication technologies in Technical & Vocational Training Organization of Sistan and Baluchestan can explain the change of employee’s empowerment to the extent of 0.417. Results also show that the level of employee’s empowerment in this organization is above than average level, their empowerment in “Competence” dimension (3.40) is more and in “effectiveness” dimension (2.79) is less than other dimensions of empowerment. Conclusion: As the findings of this study and previous research have shown, the information and communication technologies can play an important role in employee’s empowerment. Therefore it is important that organizations and their managers formulate an appropriate program and use a right strategy to take the advantages of these facilities in order to empower the employees and organization.
- انتشار مقاله: 11-10-1398
- نویسندگان: Amin Reza Kamalian,Habibollah Salarzehi,Khodadad Olyaei
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Computational and Applied Research in Mechanical Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: Numerical simulation,annular,two phase flow regimes,volume of fluid method,slug,bubbly
- چکیده:
- چکیده انگلیسی: In this paper, numerical investigation of upward two phase flow of air-water has been studied. Different conditions of flow regimes including annular, wispy annular, slug, churn and bubbly are simulated based on Hewitt and Roberts map, and a good agreement between the experimental data of the map and the numerical simulation has been observed. Accordingly, a proper CFD model in CFD software of Fluent with the required User Defined Function (UDF) has been obtained to simulate two phase flows of fluids with large density ratio in vertical tubes. The simulation is carried out with the volume of fluid (VOF) method and piecewise interface calculation (PLIC) algorithm for tracking the interface for the annular, wispy annular, churn and slug flow regimes and drift flux model for bubbly with proper selection of computational cell and time step sizes. Furthermore, water and air momentum fluxes have been changed and the changes to the flow patterns are studied.
- انتشار مقاله: 27-04-1397
- نویسندگان: Maryam Hassani,Mohammad Bagheri Motlagh,Ramin Kouhikamali
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Otorhinolaryngology
- نوع مقاله: Journal Article
- کلمات کلیدی: Endoscopy,chronic sinusitis,Debridement,Post-operative care
- چکیده:
- چکیده انگلیسی: Introduction:
This study aimed to assess the long-term effects of postoperative debridement on the 4th and 8th postoperative weeks versus no debridement in terms of subjective and objective outcomes.
Materials and Methods:
The statistical population of this study (n=80) consisted of 40 patients having chronic rhinosinusitis with nasal polyposis (CRSwNP) and 40 patients having chronic rhinosinusitis without nasal polyposis (CRSsNP). These samples were randomly divided into two groups of debridement and control.
Results:
According to the results, 8 weeks after endoscopic sinus surgery (ESS), the 22-item Sino-Nasal Outcome Test questionnaire score (P =0.03), Lund-Kennedy score (p <0.001), nasal blockage (P=0.02), and loss/decrease in sense of smell (P=0.02) in CRSwNP were significantly lower in the debridement group than in the control group. Moreover, 6 months after ESS, in both CRSwNP and CRSsNP, no significant difference was observed between the two groups considering the outcomes (P>0.05).
Conclusion:
This study showed that debridement could lead to short-term improvements in CRSwNP patients; however, no long-term benefit was observed.- انتشار مقاله: 01-07-1398
- نویسندگان: Sara Rahavi-Ezabadi,Amin Amali,Babak Saedi,Nafiseh Gilanifar,Fatemeh Mirashrafi
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Otorhinolaryngology
- نوع مقاله: Journal Article
- کلمات کلیدی: Thrombosis,Neck dissection,Jugular vein
- چکیده:
- چکیده انگلیسی: Introduction:
During functional neck dissection, the surgeon tries to preserve the internal jugular vein (IJV); however, the incidence of its narrowing or obstruction following modified radical neck dissection (MRND) or selective neck dissection (SND) varies between 0% and 29.6%. The most distressing complication of IJV thrombosis (IJVT) is pulmonary embolism. This study aimed to evaluate the incidence of IJVT following selective or modified radical neck dissection.
Materials and Methods:
In this study, 109 neck dissections were performed with the preservation of the IJV on 89 patients from March 2011 to December 2012 in the Cancer Institute of Imam Khomeini Hospital Complex, Tehran, Iran. Ultrasound evaluation of the IJV was performed in the early postoperative period and three months after the surgery.
Results:
The study population consisted of 62 male and 27 female patients with a mean age of 57+17.57 years. Ultrasound evaluation of the IJV among the participants (109 veins) indicated thrombosis in nine veins (8.25%) in the early postoperative period, four of which remained thrombotic and without flow three months after the surgery. Moreover, 96.33% of the IJVs were patent with a normal blood flow three months after the neck dissection. Among the evaluated IJVs, the only factor that showed a significant association with IJVT was the incidence of postoperative complications, including hematoma and seroma (P=0.01).
Conclusion:
It seems that the most important factor for the prevention of the IJVT is a meticulous surgery and surgical complication avoidance during neck dissection.- انتشار مقاله: 25-05-1396
- نویسندگان: Maziar Motiee-langroudi,Amin Amali,Babak Saedi,Iraj Harirchi,Sedigheh Hasani,Leyla Sahebi,Mahtab Rabbani Anari
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Otorhinolaryngology
- نوع مقاله: Journal Article
- کلمات کلیدی: Squamous Cell Carcinoma,Metastasis,laryngeal cancer,lymph nodes,Neck dissection
- چکیده:
- چکیده انگلیسی: Introduction:
To assess the rate of cervical lymph node involvement in patients with supraglottic squamous cell carcinoma (SCC) with no lymph node in clinical assessments and radiological studies.
Materials and Methods:
Fifty-six patients who underwent elective dissection of the cervical lymph node of the second through fourth level were enrolled, and pathologic evaluation of the dissected lymph nodes was performed. Lymph node involvement and association between tumor grade, smoking and gender with lymph node involvement were assessed.
Results:
The rate of the occult neck metastasis in this series was 37.5%. There was no statistically significant association between lymph node involvement and tumor grade, smoking, or gender.
Conclusion:
Based on the results of our study, we recommend elective bilateral neck dissection in all stages of N0 supraglottic SCC patients.- انتشار مقاله: 01-07-1395
- نویسندگان: Maziar Motiee Langroudi,Behrooz Amirzargar,Amin Amali,Mohammad Sadeghi,Mehrdad Jafari,Mohammad Reza Hoseini,Fatemeh Tavakolnejad
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Otorhinolaryngology
- نوع مقاله: Journal Article
- کلمات کلیدی: Opium,risk factors,Esophageal carcinoma,Laryngeal carcinoma
- چکیده:
- چکیده انگلیسی: Introduction:
Cigarette smoking and alcohol consumption have a well-known effect on the development of upper aerodigestive tract carcinomas, but such a role for opium is questionable. This study was designed to assess the correlation between opium inhalation and cancer of the larynx and upper esophagus.
Materials and Methods:
Fifty eight patients with laryngeal cancer, ninety eight patients with upper esophageal cancer and twenty seven healthy individuals with no evidence of head and neck or esophageal malignancies were selected from Otolaryngology and Radiation Oncology Department of Mashhad University of Medical Sciences. Duration and amount of cigarette smoking and opium consumption were recorded through comprehensive interviews.
Results:
The crude odds ratio for laryngeal cancer was 5.58 (95% CI 2.05-15.15, P=0.000) in cigarette smokers relative to non-smokers and 9.09 (95% CI 3.21-25.64, P=0.000) in opium users relative to non-users. The crude odds ratio for esophageal cancer was 0.44 (95% CI 0.18-1.09, P=0.07) in cigarette smokers relative to non-smokers and 1.44 (95% CI 0.57-3.62, P=0.43) in opium users relative to non-users. After adjusting for smoking, the odds ratio for laryngeal cancer in opium users relative to non-users was 6.06 (95% CI 1.10-33.23, P=0.05). Laryngeal cancer was detected at a significantly lower age in opium users (54.54±10.93 vs 62.92±10.10 years, P=0.02) than in smokers. This effect was not observed in esophageal cancer. Although the duration (year 17.50±14.84 vs 21.91±14.03; P=0.34) and amount (pack/day 0.625 vs 0.978; P=0.06) of smoking were higher among those who were opium dependent, these differences were not statistically significant (P=0.34 and P=0.06, respectively).
Conclusion:
Opium addiction by snuffing is an independent risk factor for the development laryngeal cancer but not esophageal cancer. Cigarette smoking increases this risk. Opium dependency increases the likelihood of developing laryngeal cancer at a younger age.- انتشار مقاله: 05-03-1395
- نویسندگان: Mehdi Bakhshaee,Hamid Reza Raziee,Reza Afshari,Amin Amali,Mahmoud Roopoosh,Ali Lotfizadeh
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Otorhinolaryngology
- نوع مقاله: Journal Article
- کلمات کلیدی: Surgery,Sinusitis,Polyposis,Draf,Frontal sinus,FESS
- چکیده:
- چکیده انگلیسی: Introduction:
The surgical management of chronic frontal sinus disorders remains a challenge for rhinologists. The aim of this study was to evaluate the result of Draf III in a series of patients who underwent this procedure.
Materials and Methods:
Twenty patients were included in this study. Demographic data, history of prior surgery, asthma, aspirin sensitivity and Lund–Mackay score were recorded. A visual analog scale was used for frontal-related symptoms. Patients were followed for a mean duration of 17.5 months and the patency of the frontal sinus ostium was closely monitored.
Results:
Fifteen patients with chronic frontal sinusitis, two patients with mucoceles, two with malignancy, and one with osteoma underwent Draf III. The mean symptoms score significantly decreased from 5.9 to 3. No ostial closure was seen in the follow-up period. Among 15 patients with chronic frontal sinusitis, 12 had patent ostia of whom three had significant stenosis. All patients with mucocele and osteoma had patent ostia in the follow-up period but patients with sinonasal malignancy showed significant stenosis.
Conclusion:
Draf III frontal sinusotomy is successful in alleviating patient symptoms and the frontal sinus neo-ostium will remain patent in long-term follow-up of most patients. Revision surgery will be required in some cases, which seems to be related to the nature of the underlying chronic sinus diseases.- انتشار مقاله: 02-11-1394
- نویسندگان: Mansour Hajbeygi,Ali Nadjafi,Amin Amali,Babak Saedi,Seyed Sadrehosseini
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Otorhinolaryngology
- نوع مقاله: Journal Article
- کلمات کلیدی: reliability,Persian,validity,Translation,Tinnitus Handicap Questionnaire
- چکیده:
- چکیده انگلیسی: Introduction:
Tinnitus is a common otologic symptom that can seriously affect a patient’s quality of life. The purpose of the present study was to translate and validate the Iowa Tinnitus Handicap Questionnaire (THQ) into the Persian language, and to make it applicable as a tool for determining the effects of tinnitus on a patient’s life.
Materials and Methods:
The main version of the THQ was translated into the Persian language. The agreed Persian version was administered to 150 tinnitus patients. The validity of the Persian THQ was evaluated and internal reliability was confirmed using Cronbach’s α-coefficient. Finally, the effect of independent variables such as age, mean patient threshold, gender, and duration of tinnitus were considered in order to determine the psychometric properties of tinnitus.
Results:
After an exact translation process, the Persian THQ was found to exhibit face validity. In terms of content validity, the Content Validity Ratio (CVR) reached 100% in all but two questions. Further, in structural validity measurements, intermediate correlation with annoyance from tinnitus (r= 0.49), low correlation with duration of tinnitus (r = 0.34) and high correlation with the Tinnitus Handicap Inventory (THI) questionnaire (r = 0.84) were demonstrated. Additionally, a negligible effect of gender and age was noted on degree of tinnitus handicap (P = 0.754 and
P= 0.573, respectively). In the internal reliability assessment for Factors 1, 2, 3, and the whole questionnaire, Cronbach`s α-coefficient was 0.95, 0.92, 0.25 and 0.88, respectively.
Conclusion:
The Persian version of the Iowa THQ demonstrates high validity and reliability and can be used for the determination of tinnitus handicap and for following-up in the intervention process in Persian tinnitus patients.- انتشار مقاله: 21-02-1392
- نویسندگان: Homa Arian Nahad,Masomeh Ruzbahani,Farnoush Jarollahi,Shohreh Jalaie,Akram Pourbakht,Helnaz Mokrian,Parvane Mahdi,Amin Amali,Abdolmajid Nodin Zadeh
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Otorhinolaryngology
- نوع مقاله: Journal Article
- کلمات کلیدی: vestibular,VEMP,Bone Conduction
- چکیده:
- چکیده انگلیسی: Introduction:
Vestibular evoked myogenic potential (VEMP) has recently been broadly studied in vestibular disorders. As it is evoked by loud sound stimulation, even mild conductive hearing loss may affect VEMP results. Bone-conducted (BC) stimulus is an alternative stimulation for evoking this response. This study aims to assess the characteristics of BC-VEMP in different groups of patients.
Materials and Methods:
We performed a cross sectional analysis on 20 healthy volunteers with normal pure-tone audiometry as a control group; and on a group of patients consisted of 20 participants with conductive hearing loss, five with bilateral sensorineural hearing loss and four with vestibular schawannoma. AC and BC-VEMP were performed in all participants.
Results:
In control group the VEMP responses to both kinds of stimuli had an acceptable morphology and consisted of p13 and n23 waves. Latency value of these main components in each type of stimulus was not significantly different (P>0.05). However, the mean amplitude was larger in BC modality than AC stimulation (P=0.025). In the group with conductive hearing loss, the VEMP response was absent in fifteen (46.87%) of the 32 ears using the AC method, whereas all (100%) displayed positive elicitability of VEMP by BC method. Normal VEMP responses in both stimuli were evoked in all patients with sensorineural hearing loss. In patients with unilateral vestibular schwannomas (VS), 2 (50.00%) had neither AC-VEMP nor BC-VEMP.
Conclusion:
Auditory stimuli delivered by bone conduction can evoke VEMP response. These responses are of vestibular origin and can be used in vestibular evaluation of patients with conductive hearing loss.- انتشار مقاله: 31-04-1391
- نویسندگان: Parvane Mahdi,Amin Amali,Akram Pourbakht,Alireza Karimi Yazdi,Ali Bassam
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Otorhinolaryngology
- نوع مقاله: Journal Article
- کلمات کلیدی: Granulation tissue,Mastoidectomy,Canal Wall Down,Mitomycin C
- چکیده:
- چکیده انگلیسی: Introduction:
Otorrhea and granulation tissue in Canal Wall Down mastoidectomy (CWD) is the common problem in cholesteatoma removal and leads to many discomfort for both the patient and the physician. The main objective in CWD is creating the dry cavity, so the topical antibiotic and acetic acid in variable saturations are used for this purpose. In this study we evaluate the effectiveness of topical MMC and chemical cautery by acetic acid.
Materials and Methods:
Study population consists of 50 patients with cholesteatoma whom underwent CWD. All patient allocated randomly in two study groups, MMC and acetic acid. After 3 weeks, the first visit is planned, extension of granulation tissue and dryness of cavity are evaluated and topical drugs are used in blind fashion. MMC in 4% and acetic acid in 12.5% saturation are applied. Other visits are completed at next month and 3 months later.
Results:
Both methods are effective in treatment of granulation tissue. In each group both treatment were effective too but MMC was more effective than acid acetic in the treatment of granulation tissue after 4 weeks.
Conclusion:
Based on our findings, it is clear that topical MMC is very effective in the treatment of granulation tissue and in CWD. It results in dry cavity much better than acetic acid without any complication.- انتشار مقاله: 19-03-1391
- نویسندگان: Alireza Karimi-Yazdi,Mandana Amiri,Sohrab Rabiei,Amin Amali,Maziar Motiee-langroudi
- مشاهده