Middle Turbinate Osteoma

Ahmad Daneshi,Ashkan Heshmatzade-Behzadi,Maryam Jalessi 대한이비인후과학회 2010 Clinical and Experimental Otorhinolaryngology Vol.3 No.4

Osteoma is the most common benign tumor of the paranasal sinuses. Turbinate osteomas are very rare and only four middle turbinate, one superior turbinate and one inferior turbinate osteoma cases have been reported. We present a rare case of osteoma of the left middle turbinate in a patient presented with unilateral nasal obstruction and epiphora that was removed endoscopically, and conduct a literature review on turbinate osteomas arising from different turbinates, their symptoms and management.

Green Grinding with Innovative Wheel Topography

Taghi Tawakoli,Amir Daneshi,이달호 한국정밀공학회 2013 International Journal of Precision Engineering and Vol. No.

Reduction or elimination of coolant-lubricants in machining processes is of significant interest for ecological and economical reasons. However, the desire to eliminate fluid usage in grinding processes represents a considerable challenge in moving towards green grinding due to the high energy input and high heat flux generated within the grinding zone. In order to perform the efficient grinding process without thermal damages, the chip formation needs to be optimized so that the friction between the grinding wheel and workpiece is minimized. Structured wheels, the idea introduced and developed by KSF (Institute of Grinding and Precision Technology) in recent years, show a great potential to approach the process with optimum chip formation condition. The concept is based on the reduction of static cutting edges through creating a specific structure on the wheel surface. This leads to a larger chip thickness and consequently lower friction during the grain-workpiece engagement. The experiments conducted by the structured wheels prove the lower grinding forces and energy as compared to those performed by normal wheels. This paper is aiming to take a step towards the green manufacturing technology through benefiting from these great advantages in plunge cylindrical dry grinding, in which the heat generation is a crucial factor. The experiments carried out with CBN structured wheels resulted lower grinding forces and energy as well as workpiece surface and subsurface temperatures as compared to when using the normal wheels.

The Prevalence and Risk Factors for Diabetic Retinopathy in Shiraz, Southern Iran

Haleh Ghaem,Nima Daneshi,Shirin Riahi,Mostafa Dianatinasab 대한당뇨병학회 2018 Diabetes and Metabolism Journal Vol.42 No.6

Globally, diabetic retinopathy (DR) is one of the leading causes of blindness, that diminishes quality of life. This study aimed to describe the prevalence of DR, and its associated risk factors. This cross-sectional study was carried out among 478 diabetic patients in a referral center in Fars province, Iran. The mean±standard deviation age of the participants was 56.64±12.45 years old and DR prevalence was 32.8%. In multivariable analysis, lower education levels (adjusted odds ratio [aOR], 0.43; 95% confidence interval [CI], 0.24 to 0.76), being overweight (aOR, 1.70; 95% CI, 1.02 to 2.83) or obese (aOR, 1.88; 95% CI, 1.09 to 3.26), diabetes duration of 10 to 20 years (aOR, 2.35; 95% CI, 1.48 to 3.73) and over 20 years (aOR, 5.63; 95% CI, 2.97 to 10.68), receiving insulin (aOR, 1.99; 95% CI, 1.27 to 3.10), and having chronic diseases (aOR, 1.71; 95% CI, 1.02 to 2.85) were significantly associated with DR. In conclusion, longer diabetes duration and obesity or having chronic diseases are strongly associated with DR suggesting that control of these risk factors may reduce both the prevalence and impact of retinopathy in Iran.

Comparison of the Minimum Plateau Width by Plateau and a New Method in People with Conductive Hearing Loss

Seyyed Jalal Sameni,Ahmad Daneshi,Akram Pourbakht,Aliakbar Tahaei,Mohammad Kamali 대한청각학회 2018 Journal of Audiology & Otology Vol.22 No.4

Background and Objectives: In clinical masking, the plateau is a state in which the non-test ear (NTE) is completely masked by the noise and tone is heard only by the test ear (TE). At least 15 to 20 dB of plateau width is needed to obtain valid threshold. In the study, a part of plateau after initial masking level known as the minimum plateau width (mPW) was determined and compared by a new formula and the plateau searching method. Subjects and Methods: Minimum plateau widths of air conduction were obtained in 29 participants with unilateral and 30 participants with bilateral conductive hearing loss (CHL) aged 20 to 45 years old by using step by step plateau method and mPW estimation by the formula between two points of masking diagram [mPW=(N2-N1)-(T2-T1)] and then the mPW of twomethods was compared for each frequency. Results: There was no significant difference between the minimum plateau width obtained by the plateau and formula methods for two given point of masking diagram in people with unilateral and bilateral CHL at octave frequencies from 500 Hz to 4,000 Hz. Conclusions: Threshold obtaining of TE by two tones for two noise levels delivered to the NTE is enough to estimate the mPW between these two noise points and it is not necessary that for clinicians to know the actual values of masking diagram components.

Serum levels of interleukin-6 and interleukin-8 as diagnostic markers of acute pyelonephritis in children

Mahyar, Abolfazl,Ayazi, Parviz,Maleki, Mohammad Reza,Daneshi-Kohan, Mohammad Mahdi,Sarokhani, Hamid Reza,Hashemi, Hassan Jahani,Talebi-Bakhshayesh, Mousa The Korean Pediatric Society 2013 Clinical and Experimental Pediatrics (CEP) Vol.56 No.5

Purpose: Early diagnosis and treatment of acute pyelonephritis in children is of special importance in order to prevent serious complications. This study was conducted to determine the diagnostic value of serum interleukin (IL)-6 and IL-8 in children with acute pyelonephritis. Methods: Eighty-seven patients between 1 month to 12 years old with urinary tract infection (UTI) were divided into 2 groups based on the result of 99m-technetium dimercapto-succinic acid renal scan: acute pyelonephritis (n=37) and lower UTI (n=50) groups. White blood cell (WBC) count, neutrophil (Neutl) count, erythrocyte sedimentation rate (ESR), C-reactive protein (CRP) concentration, platelet count, and serum IL-6 and IL-8 concentrations of both groups were measured and compared. Results: There was a significant difference between two groups regarding WBC count, Neutl count, ESR, and CRP concentration (P<0.05). In addition, the difference between the two groups regarding serum IL-6 and IL-8 concentrations was not significant (IL-6, 60 and 35.4 pg/mL and IL-8, 404 and 617 pg/mL, respectively). The sensitivity and specificity of serum IL-6 and IL-8 for diagnosis of acute pyelonephritis were 73%, 42% and 78%, 32%, respectively. Sensitivity, specificity, negative and positive predictive values of serum IL-6 and IL-8 were less than those of acute phase serum reactants such as CRP. Conclusion: This study showed that there was no significant difference between acute pyelonephritis and lower UTI groups regarding serum IL-6 and IL-8 levels. Therefore, despite confirming results of previous studies, it seems that IL-6 and IL-8 are not suitable markers for differentiating between acute pyelonephritis and lower UTI.

Serum interleukin-1beta and tumor necrosis factor-alpha in febrile seizures: is there a link?

Mahyar, Abolfazl,Ayazi, Parviz,Orangpour, Reza,Daneshi-Kohan, Mohammad Mahdi,Sarokhani, Mohammad Reza,Javadi, Amir,Habibi, Morteza,Talebi-Bakhshayesh, Mousa The Korean Pediatric Society 2014 Clinical and Experimental Pediatrics (CEP) Vol.57 No.10

Purpose: Febrile seizures are induced by fever and are the most common type of seizures in children. Although numerous studies have been performed on febrile seizures, their pathophysiology remains unclear. Recent studies have shown that cytokines may play a role in the pathogenesis of febrile seizures. The present study was conducted to identify potential links between serum interleukin-1beta (IL-$1{\beta}$), tumor necrosis factor-alpha (TNF-${\alpha}$), and febrile seizures. Methods: Ninety-two patients with simple or complex febrile seizures (46 patients per seizure type), and 46 controls with comparable age, sex, and severity of temperature were enrolled. Results: The median concentrations of serum IL-$1{\beta}$ in the simple, complex febrile seizure, and control groups were 0.05, 0.1, and 0.67 pg/mL, respectively (P=0.001). Moreover, the median concentrations of TNF-${\alpha}$ in the simple, complex febrile seizure, and control groups were 2.5, 1, and 61.5 pg/mL, respectively (P=0.001). Furthermore, there were significant differences between the case groups in serum IL-$1{\beta}$ and TNF-${\alpha}$ levels (P<0.05). Conclusion: Unlike previous studies, our study does not support the hypothesis that increased IL-$1{\beta}$ and TNF-${\alpha}$ production is involved in the pathogenesis of febrile seizures.

Investigating Elastic Stability of Cylindrical Shell with an Elastic Core under Axial Compression by Energy Method

A. Ghorbanpour Arani,S. Golabi,Loghman,H. Daneshi 대한기계학회 2007 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.21 No.7

Serum levels of interleukin-6 and interleukin-8 as diagnostic markers of acute pyelonephritis in children

Abolfazl Mahyar,Parviz Ayazi,Mohammad Reza Maleki,Mohammad Mahdi Daneshi-Kohan,Hamid Reza Sarokhani,Hassan Jahani Hashemi,Mousa Talebi-Bakhshayesh 대한소아청소년과학회 2013 Clinical and Experimental Pediatrics (CEP) Vol.56 No.5

Purpose: Early diagnosis and treatment of acute pyelonephritis in children is of special importance in order to prevent serious complications. This study was conducted to determine the diagnostic value of serum interleukin (IL)-6 and IL-8 in children with acute pyelonephritis. Methods: Eighty-seven patients between 1 month to 12 years old with urinary tract infection (UTI)were divided into 2 groups based on the result of 99m-technetium dimercapto-succinic acid renal scan:acute pyelonephritis (n=37) and lower UTI (n=50) groups. White blood cell (WBC) count, neutrophil (Neutl)count, erythrocyte sedimentation rate (ESR), C-reactive protein (CRP) concentration, platelet count,and serum IL-6 and IL-8 concentrations of both groups were measured and compared . Results: There was a significant difference between two groups regarding WBC count, Neutl count,ESR, and CRP concentration (P<0.05). In addition, the difference between the two groups regarding serum IL-6 and IL-8 concentrations was not significant (IL-6, 60 and 35.4 pg/mL and IL-8, 404 and 617 pg/mL, respectively). The sensitivity and specificity of serum IL-6 and IL-8 for diagnosis of acute pyelonephritis were 73%, 42% and 78%, 32%, respectively. Sensitivity, specificity, negative and positive predictive values of serum IL-6 and IL-8 were less than those of acute phase serum reactants such as CRP. Conclusion: This study showed that there was no significant difference between acute pyelonephritis and lower UTI groups regarding serum IL-6 and IL-8 levels. Therefore, despite confirming results of previous studies, it seems that IL-6 and IL-8 are not suitable markers for differentiating between acute pyelonephritis and lower UTI.

Serum interleukin-1beta and tumor necrosis factor-alpha in febrile seizures: is there a link?

Abolfazl Mahyar,Parviz Ayazi,Reza Orangpour,Mohammad Mahdi Daneshi-Kohan,Mohammad Reza Sarokhani,Amir Javadi,Mousa Talebi-Bakhshayesh 대한소아청소년과학회 2014 Clinical and Experimental Pediatrics (CEP) Vol.57 No.10

Purpose: Febrile seizures are induced by fever and are the most common type of seizures in children. Although numerous studies have been performed on febrile seizures, their pathophysiology remainsunclear. Recent studies have shown that cytokines may play a role in the pathogenesis of febrileseizures. The present study was conducted to identify potential links between serum interleukin-1beta(IL-1β), tumor necrosis factor-alpha (TNF-α), and febrile seizures. Methods: Ninety-two patients with simple or complex febrile seizures (46 patients per seizure type),and 46 controls with comparable age, sex, and severity of temperature were enrolled. Results: The median concentrations of serum IL-1β in the simple, complex febrile seizure, and controlgroups were 0.05, 0.1, and 0.67 pg/mL, respectively (P=0.001). Moreover, the median concentrationsof TNF-α in the simple, complex febrile seizure, and control groups were 2.5, 1, and 61.5 pg/mL,respectively (P=0.001). Furthermore, there were significant differences between the case groups inserum IL-1β and TNF-α levels (P<0.05). Conclusion: Unlike previous studies, our study does not support the hypothesis that increased IL-1βand TNF-α production is involved in the pathogenesis of febrile seizures.

Evaluation of goodness of fit of semiparametric and parametric models in analysis of factors associated with length of stay in neonatal intensive care unit

Kheiry, Fatemeh,Kargarian-Marvasti, Sadegh,Afrashteh, Sima,Mohammadbeigi, Abolfazl,Daneshi, Nima,Naderi, Salma,Saadat, Seyed Hossein The Korean Pediatric Society 2020 Clinical and Experimental Pediatrics (CEP) Vol.63 No.9

Background: Length of stay is a significant indicator of care effectiveness and hospital performance. Owing to the limited number of healthcare centers and facilities, it is important to optimize length of stay and associated factors. Purpose: The present study aimed to investigate factors associated with neonatal length of stay in the neonatal intensive care unit (NICU) using parametric and semiparametric models and compare model fitness according to Akaike information criterion (AIC) between 2016 and 2018. Methods: This retrospective cohort study reviewed 600 medical records of infants admitted to the NICU of Bandar Abbas Hospital. Samples were identified using census sampling. Factors associated with NICU length of stay were investigated based on semiparametric Cox model and 4 parametric models including Weibull, exponential, log-logistic, and log-normal to determine the best fitted model. The data analysis was conducted using R software. The significance level was set at 0.05. Results: The study findings suggest that breastfeeding, phototherapy, acute renal failure, presence of mechanical ventilation, and availability of central venous catheter were commonly identified as factors associated with NICU length of stay in all 5 models (P<0.05). Parametric models showed better fitness than the Cox model in this study. Conclusion: Breastfeeding and availability of central venous catheter had protective effects against length of stay, whereas phototherapy, acute renal failure, and mechanical ventilation increased length of stay in NICU. Therefore, the identification of factors associated with NICU length of stay can help establish effective interventions aimed at decreasing the length of stay among infants.