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Search Results: 1 - 10 of 422 matches for " Hamidreza Nasseh "
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The Relationship between Lipid Profile and Erectile Dysfunction
Mohammadreza Nikoobakht,Maziar Pourkasmaee,Hamidreza Nasseh
Urology Journal , 2005,
Abstract: Purpose: To evaluate the relationship between serum lipids including cholesterol, low-density lipoprotein (LDL), high-density lipoprotein (HDL), and triglyceride and erectile dysfunction (ED). Materials and Methods: From January 2000 to June 2003, 100 patients with organic ED, who were referred to our center, were selected and their lipid profile (Cholesterol, Triglyceride, HDL, LDL) were assessed. The results were compared with those in 100 healthy individuals. Results: Mean age of men in the study and control groups were 43.72 ± 9.76 and 43.59 ± 10.51 years, respectively. Mean plasma cholesterol and LDL levels in individuals suffering from erectile dysfunction were significantly higher than controls (P = 0.04 and P = 0.02, respectively). However, no difference in the mean plasma triglyceride and HDL levels was seen. Odds Ratios for high plasma cholesterol level (> 240 mg/dl) and high plasma LDL level (> 160 mg/dl) were 1.74 and 1.97, respectively (r2 = 0.04 and r2 = 0.04). Using linear regression analysis, the regression coefficient for cholesterol and LDL versus the International Index of Erectile Dysfunction Questionnaire (IIEF) score were -0.036 and -0.035, respectively (95% confidence interval: 0.98 - 2.5 for cholesterol and 1.13 - 2.81 for LDL). Conclusion: The impact of total cholesterol and particularly LDL on men’s erectile function underlines the role of hyperlipidemia treatment in prevention of ED and emerges a holistic management in ED patients.
Focal neuropathies following percutaneous nephrolithotomy (PCNL) – preliminary study [Fokale Neuropathien nach perkutaner Nephrolithotomie (PCNL)]
Nasseh, Hamidreza,Pourreza, Farshid,Saberi, Alia,Kazemnejad, Ehsan
GMS German Medical Science , 2013, DOI: 10.3205/000175
Abstract: [english] Introduction: Postoperative neurological complications in pelvic and renal surgery are a well-known clinical problem and their morbidities are important. We designed this study to determine prevalence and risk factors of such complications after percutaneous nephrolithotomy (PCNL) surgery.Material and methods: A cross-sectional study was performed during February and July 2011 on 68 PCNL cases. Demographic data and surgery reports were gathered and comprehensive neurological physical examination carried out before and after surgery. Then, data was analyzed using software SPSS 18. Results: The ultimate sample included 30 (46.2%) male and 35 (53.8%) female patients with a mean age of 47.9 ± 11.47 years. In intercostal and lumbosacral plexus area, sensory neurological complications occurred in 8 patients (12.31%), 4 men and 4 women. The most common involved dermatomes and nerves were T12 (8 cases). There was a significant correlation between prolonged duration of surgery and prevalence of sensory complications (p<0.010). The highest hemoglobin value drop after surgery occurred in patients with neurological complications (p<0.001). There were no correlations between age, tracts used, diabetes mellitus, BMI, hypertension, positioning of patients and side of surgery with incidence of sensory neurological complications. No motor neurological complications occurred. Conclusion: Prolonged duration of PCNL and increased value of hemoglobin drop may lead to increased risk of neuropathy. Larger prospective studies with retroperitoneal imagings and patients’ follow up is suggested for better understanding of this complication. [german] Einleitung: Postoperative neurologische Komplikationen bei operativem Eingriff an Becken und Niere sind ein bekanntes klinisches Problem und deren Krankheitsverl ufe sind wichtig. Wir planten diese Studie, um die Pr valenz und die Risikofaktoren derartiger Komplikationen nach perkutaner Nephrolithotomie (PCNL) zu erfassen.Material und Methoden: Von Februar bis Juli 2011 wurde eine Querschnittstudie an 68 PCNL-F llen durchgeführt. Die demographischen Daten und die Operationsberichte wurden ausgewertet und umfassende neurologische und k rperliche Untersuchungen wurden vor und nach dem chirurgischen Eingriff vorgenommen. Die Daten wurden mit der Software SPSS 18 analysiert.Ergebnisse: In die Studie einbezogen wurden 30 m nnliche (46,2%) und 35 (53,8%) weibliche Patienten mit einem mittleren Alter von 47,9 ± 11,47 Jahren. Bei 8 Patienten (12,31%), bei 4 M nnern und 4 Frauen, wurden im Bereich des interkostalen und lumbosakralen P
Pre-operative Imaging May Overestimate the Kidney Tumor Size
Hamidreza Nasseh,Siavash Falahatkar,Atefeh Ghanbari,Hossein Bagheri Chenari
Urology Journal , 2012,
Abstract: Purpose: To compare the kidney tumor size on radical nephrectomy pathology specimen with size estimated by computed tomography (CT) scan and ultrasonography.Materials and Methods: The tumor size on pathology specimen of 40 patients who had undergone radical nephrectomy at our center from March 2003 until March 2009 was compared with pre-operative CT scan and ultrasonography findings. The paired t test was used to compare the means.Results: The participants included 40 patients, 25 men and 15 women, with the mean age of 64.12 ± 10.75 years (range, 42 to 79 years). All tumors were renal cell carcinoma. Mean tumor size on pathology specimen was 6.2 ± 1.1 cm. Mean tumor size estimated by pre-operative CT scan and ultrasonography was 7.34 ± 1.83 cm and 7.4 ± 1.96 cm, respectively (P = .001). Tumor stage did not affect this significant difference. There was not any significant difference between tumor size estimated by CT scan or ultrasonography (P = .39).Conclusion: Computed tomography scan and ultrasonography both may overestimate renal tumor size. This point must be considered in clinical staging and treatment selection. Multicenter prospective comparison is suggested.
Clipless Laparoscopic Retroperitoneal Lymph Node Dissection Using Bipolar Electrocoagulation for Sealing Lymphatic Vessels: Initial Series
Nasser Simforoosh,Hamidreza Nasseh,Parham Masoudi,Mohammad Asl Zare
Urology Journal , 2012,
Abstract: PURPOSE: To evaluate the outcome of laparoscopic retroperitoneal lymph node dissection (LRPLND) using bipolar electrocoagulation instead of clipping the lymphatic vessels. MATERIALS AND METHODS: Between August 2002 and April 2008, a total of 13 patients underwent transperitoneal LPRLND for nonseminomatous germ cell tumor of the testis. In this experience, in contrast to other techniques, we did not use clips for ligation of the lymphatic vessels; instead, we used bipolar cautery for coagulation of the lymphatic vessels. We followed up the patients for lymphocele formation or lymphatic leakage using abdominal computed tomography scan. RESULTS: Mean age of the patients was 24.2 years (range, 19 to 39 years). Six tumors were on the left side and 7 on the right. Pathological stage was in 12 patients and ПA in one. The mean follow-up period was 29.9 months (range, 3 to 70 months). No re-operation was required. There was no prolonged lymphatic leakage or lymphocele formation during the follow-up period. CONCLUSION: Our study demonstrates that using bipolar electrocoagulation instead of clips, for sealing of the lymphatic vessels during LRPLND, does not hamper the outcome of the procedure. This should be further evaluated in randomized clinical trials with more subjects.
Urinary Tamm-Horsfall Protein and Citrate: A Case-Control Study of Inhibitors and Promoters of Calcium Stone Formation
Gholamreza Pourmand,Hamidreza Nasseh,Abdolfattah Sarrafnejad,Abdolrasoul Mehrsai
Urology Journal , 2005,
Abstract: Introduction: This study aimed to compare urinary Tamm-Horsfall protein (THP), citrate, and other inhibitors and promoters of stone formation in calcium stone formers with those in healthy individuals. Materials and Methods: From January 2002 to June 2004, 100 calcium stone formers (mean age, 38.6 ± 10.3 years) who had at least 2 episodes of calcium stone formation were compared with 100 healthy individuals (mean age, 33.8 ± 9.7 years). Their 24-hour urine THP (using the sodium dodecyl sulfate polyacrylamide gel electrophoresis method), citrate, calcium, uric acid, oxalate, and magnesium values were measured and compared. Results: The mean 24-hour urine THP was 3.3 ± 8.1 mg in patients in the study group and 4.6 ± 19.2 mg in controls (P = 0.5). However, THP in individuals with and without bacteriuria was significantly different (15.8 ± 33.6 versus 2.6 ± 10.2, P < 0.001). Mean 24-hour urinary calcium, citrate, and oxalate values were 232.6 ± 95.3 mg and 177.8 ± 82.7 mg (P < 0.001), 132 ± 103.2 mg and 395 ± 258.5 mg (P < 0.001), and 18.9 ± 22.5 mg and 10.4 ± 8.5 mg (P < 0.001) in patients in the study and control groups, respectively. There was a significant positive correlation between urinary citrate and promoters of stone formation, including urinary calcium, oxalate, and uric acid, in patients in the control group, but not in patients in the study group. Conclusion: THP in the urine of stone formers is not quantitatively different from that of healthy individuals, but it is different in patients with bacteriuria. Increased urinary excretion of calcium, oxalate, and uric acid in stone formers with no increase in urine citrate may play a role in the pathogenesis of recurrent stone formation.
Modified f(R) Gravity and Thermodynamics of Time-Dependent Wormholes at Event Horizon  [PDF]
Hamidreza Saiedi
Journal of High Energy Physics, Gravitation and Cosmology (JHEPGC) , 2017, DOI: 10.4236/jhepgc.2017.34053
Abstract: In the context of modified \"\" gravity theory, we study time-dependent wormhole spacetimes in the radiation background. In this framework, we attempt to generalize the thermodynamic properties of time-dependent wormholes in \"\" gravity. Finally, at event horizon, the rate of change of total entropy has been discussed.
Synthesis and Characterization of Copper Nanoparticles by Bis-(Acetylacetonato)-Copper (II) Using Nonionic Surfactants and the Effect of Their Structures on Nanoparticles Size and Yield  [PDF]
Hamidreza Kamrani
Open Journal of Inorganic Non-metallic Materials (OJINM) , 2018, DOI: 10.4236/ojinm.2018.82002
Abstract: Between all precursors of copper complex, bis-(acetylacetonato)-copper (II) and bis-oxalate copper (II) with very close structures are two of the best representatives for copper nanoparticles synthesis. In this research, only bis-(acetylacetonato)-copper (II) in presence of some effective non-ionic surfactants such as Triton X-100, Dodecylamine, Tween 80 and also triphenylphosphine as a reducing agent via thermal decomposition process was used for copper nanopaticles synthesis. Two shif-base E19 and E22 complexes were also used for the investigation of these kinds of shif-base complexes capabilities by this method as precursors and all results were compared with each other. Between all surfactants, Triton X-100 gave the best yield with the largest grains. The techniques used for characterization of copper nanoparticles were TEM, EDX, FT-IR and XRD. TG-DTA and CV were used for characterization of bis-(acetylacetonato)-copper (II) complex.
Relationship between loss of exercise consequences and risk of cardiovascular diseases after detraining
Mehdi Mogharnasi,Mahtab Nasseh
Zahedan Journal of Research in Medical Sciences , 2011,
Abstract: Background: The studies show that regular exercise may play an important role in improvement the cardiovascular status and with detraining period people will loose its useful outcome. The aim of this study was to assess the effect of short detraining period on cardiovascular biomarkers in Wistar rats.Materials and Method: Forty-two male rats were divided randomly in two groups: experimental group (n=24) and control group (n=18). The training program was done 3 times per week, for 8 weeks. Then six rats experienced detraining. The blood samples were collected after 14 fasting hours in different stages and with the same conditions. The quantity of sICAM-1 was measured, using the commercial R&D Elisa kit. The quantity of total cholesterol (TC), triglyceride (TG), HDL & LDL in plasma was measured by using Pars-Azmoon kits. Data were analyzed by Kolmogrov-Smirnov, repeated measures of ANOVA, LSD and t-test. The amount of errors were computed in the level of p<0.05.Results: Thirty-six sessions of aerobic training made significant changes in variables and after 4 weeks of detraining the amount of measured variables were changed in to the insignificant baseline level. There were significant changes when detraining group compared with training group at the end of study [sICAM-1 (p=0.006), TC (p=0.004), TG (p=0.005) & LDL-C (p=0.037), HDL-C (p=0.037)].Conclusion: The results showed, detraining casuses the increase of dangerous factors and body faces the risk of cardiovascular diseases and atherosclerosis
An Internal Structure Investigation on Euphorbia L. Species in North-East of Iran
A. Jafari,Y. Nasseh
Asian Journal of Plant Sciences , 2009,
Abstract: In present research anatomical studies carried out 11 species which growing in Khorassan Province (North-East of Iran). These species were divided to two groups, annual and perennial species. For comparative anatomy studying, cross sections from stem and leaf were prepared using microtome and differential staining. The characters of secondary xylem and axial parenchyma, arrangement of vessel and the arrangement of mesophyll were studied. The results showed the variation of internal structure didn`t have correspondence to taxonomy position.
On Ext-indices of ring extensions
Saeed Nasseh,Yuji Yoshino
Mathematics , 2007,
Abstract: In this paper we are concerned with the finiteness property of Ext-indices of several ring extensions. In this direction, we introduce some conjectures and discuss the relationship of them. Also we give affirmative answers to these conjectures in some special cases. Furthermore, we prove that the trivial extension of an Artinian local ring by its residue class field is always of finite Ext-index and we show that the Auslander-Reiten conjecture is true for this type of rings.
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