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Search Results: 1 - 10 of 2016 matches for " Sh. Seirafian "
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Continous venovenous hemodialysis (CVVHD): Report of 3 cases
Seirafian Sh,Bastani B
Tehran University Medical Journal , 1998,
Abstract: Some of ICU patients with Acute Renal Failure (ARF) require dialysis. Conventional or intermittent hemodialysis (HD) may cause hypotension and insufficient loss of fluids and toxins from blood. Peritoneal dialysis also my cause peritonitis and has lower efficiency than HD. We did continuous Venovenous Hemodialysis (CVVHD) for three ICU patients with ARF in Saint-Zahra Medical Center for the first time in our country. Method and Material: With a polysulfone membrane, blood pump, peritoneal dialysis solution, heparin, and a fix nurse, HD was done for 12-24 hours. Results: 1) Urea clearance was 18-50 ml/h. 2) Ultrafiltration was 160-1000 ml/h. 3) With dialysis, hemorrhage, coagulation disorder, and oxygenation recovered. 4) All of patients developed hyperglycemia and hypothermia. 5) All of patients died (two with septicemia and one with hypotension). Conclusion: In the absence of hemodialysis or peritoneal dialysis, CVVHD with present preliminary equipments is suitable and can excrete more toxins and fluids.
Response Rate to Hepatitis B Vaccination in Patients with Chronic Renal Failure and End-Stage-Renal-Disease: Influence of Diabetes Mellitus
Sh Taheri,Sh Shahidi,J Moghtaderi,Sh Seirafian
Journal of Research in Medical Sciences , 2005,
Abstract: Background: Hepatitis B vaccination is recommended for all individuals with renal failure. Nevertheless, the response rate for this vaccine in hemodialysis patients is low. This study was designed to determine the response rate to hepatitis B vaccination in chronic renal failure (CRF) and end stage renal disease (ESRD) patients and those factors that Methods: We evaluated antiHBs level after primary vaccination in 32 predialysis and 93 dialysis patients. HBsAg positive patients were excluded. AntiHBs titers were determined in the period of 1 to 6 months after completion of vaccination. Results: Seroconversion (antiHBs>10mIU/ml) was found in 100 patients (80%), but an excellent response (titer>100 mIU/ml) was observed only in 74 (59.2%). Response rate were 71.9 and 82.8 in predialysis CRF and ESRD patients, respectively, but this difference was not significant (χ2-test; p=0.183). Predialysis patients showed an excellent response more than dialysis patients (χ2-test; p<0.05). Age, sex, and initial serum creatinine didn’t influence response rate. Response rate in patients with diabetic mellitus was lower than others (62.2% vs. 87.5%) (χ2-test; p=0.001), and multiple logistic regression analysis showed a significant risk for vaccination nonresponse when patients were diabetics (oddsratio 4.38; 95% confidence interval: 1.70-11.24, p=0.002). Conclusion: Our result showed that 1) hepatitis B vaccine nonresponders are more likely to have diabetes mellitus and 2) response rate in predialysis patients is the same as in dialysis patients but predialysis patients, as compared with dialysis patients, were more inclined to show an excellent response. Key words: HBV vaccination, Chronic Renal Failure, dialysis, Diabetes Mellitus
Malignancy after renal transplantation: a case series study from Isfahan University
Sh. Shahidi,Sh. Seirafian,B. Shayegan Nia,H. Adilipoor
Tehran University Medical Journal , 2006,
Abstract: Background: Long term use of immunosuppressive therapy in transplant recipients in order to prevent acute and chronic rejection increases the long term risk of cancer. This study evaluates the incidence of different organs’ cancer after renal transplantation and immunosuppressive therapy. Methods: This is a retrospective analysis of malignant tumors in renal graft recipients with more than one year graft survival. Patients were assessed according to their age, sex, diagnosis of cancer, immunosuppressive drugs, donors and period of dialysis before transplantation. Results: Evaluating all existing files in selected private clinics in Isfahan 350 patients were reviewed and 289 of them had entrance criteria. A total of 186 men and 103 women (mean age: 42.17±13.09 years) were included. They were followed up over a mean period of 52.46±33.24 months. A total of six cases (2.1%) of cancer were diagnosed in six recipients: All patients with cancer were male with a mean age of 51.17±14.7 years (range: 26-68 years). Tumor presented at a mean time of 51 months (rang: 15-82 months) after transplantation. There were two patients with BCC, two patients with SCC and two patients with lymphoma. Two patients died of progressive malignant disease. Age, period of dialysis before transplantation, and using immunosuppressive and anti-rejection drugs had no significant impact on development of post transplant malignancy. Conclusion: The frequency of tumors in these patients is lower than what reported by other centers, probably due to short period of follow up and low incidence of cancer in our general population. The risk of malignancy was 28 fold higher among transplant recipients than in general population. High risk of cancer in this group, confirms the necessity of routine examination for organ transplant recipients both before and after transplantation.
Journal of Research in Medical Sciences , 2003,
Abstract: Introduction: Cryptosporidium is a parasite from coccidian order and one of the most common causes of diarrhea in the world, which can lead to a severe and prolonged disease in immunodeficient patients. There is a discrepancy regarding the prevalence rate of this parastie in different studies in our country patients on dialysis are usually prone to infectious disease especially those caused by opportunistic organisms. We studied the prevalence rate of the cryptosporidium infection in a group of patients on dialysis who were considered to have acquired immunodeficiency. Methods: This is a descriptive analytic study which included 104 dialyzed patients on dialysis in Al-zahra, shariati and Ali-asghar hospital, Isfahan, Iran. Between January 2001 and October 2001. Cases were chosen according to convenience sampling standards. They were all tested for cryptosporidium infection. Test results in the case group were then compared with the rate of cryptosporidium infection. In the control group which included 91 healthy household family members of the patients in the case group and 140 healthy people from the society. At least two samples were collected from every subject on two different occasions. To detect cryptosporidium oocytes, modified acid-fast technique we used. Results: 12 (11/5%) out of the 104 cases were proved infected by cryptosporidium. This figure dropped to 3.9% in control group respectively. Based on X2 test, rate of infection for the case group was considerably greater than for the control group Infection in the case group didn't show any significant relation with such factors as sex, age and duration of dialysis, history if kidney transplantation and history of immunosuppressive drugs consumption. The rate of infection peaked in diabetic cases (19.4%), while compared with non- diabetic ones (8.3%) (p<0.05). Conclusions: Our study showed that the prevalence rare of cryptosporidium infection in dialyzed patients was considerably higer than general population. The results were fully correspondent with those of other surveys on immunocompromized patients. Neither Our study nor the similar previously conducted ones revealed no significant association between age and sex and cryptosporidium infection. We couldn't show any relation between the rate of infection and duration of dialysis. This difference is likely due to either limited number of cases or a lack of proportional increase in susceptibility to infection atter a certain period of dialysis. Finally we found out that the rate of infection in dialyzed diabetic patients was extra ordinarily h
The Conductivity of Indium Phosphide Irradiated by Fast Electrons  [PDF]
Sh. Sh. Rashidova
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.411183

In this work, studied electrical conductivity(s) and annealing of radiation defects in crystals of n-InP are irradiated by electrons energy of 6 MeV and doses of 1017 el/cm2 (centimeter) and 2 × 1017 el/cm2 (centimeter). It is shown that alongside point defects (in the form of complexes with impurity atoms in crystals of n-InP) also form the complex defects of the type of disordered areas, annealing of which proceeds at T > 300°C that binds accumulating radiation defects.

The Outcome of in vitro fertilization and embryo transfer in women with polycystic ovary syndrome in comparison with tubal factor
M. Ashrafi,H. Seirafian-poor,J. Fazel
Journal of Mazandaran University of Medical Sciences , 2005,
Abstract: Background and purpose : Infertility with an incidence of about 15% has mainly been one of the community burdens that have even been threatening to the continuity of the family life. One of the most prevalent causes of women infertility is ovarian causes particularly PCOS. The aim of this study was to determine the outcome of IVF & ET in women with PCOS in comparison with tubal factor.Materials and methods : This was a historical cohort study performed from 1997 to 1999, at Royan Institute. 33 patients with PCOS (without any other causes of infertility) who failed standard ovulation induction treatment with clomiphen citrate (≥6 cycles) underwent 33 cycles of IVF & ET. Controlled group include 76 patients with only tubal factor infertility. Long protocol with Buserelin (GnRHa)/HMG was used in this study.IVF & ET cycle characteristics were compared using students t-test and χ2 and Fisher’s exact test.Results : The results of this research showed that there were statistically significant difference in mean age and incidence of OHSS in two groups. Howerer there were no satistically significant differences in duration of follicular phase, the duration of GnRHa usage up to the onset of HMG, cyst number after using GnRHa, cyst aspiration percent, HMG ampoule retrieved oocyte, produced embryo per person, embryo transfer per person, cycle cancellation and pregnancy rate per embryo transfer in two groups.Conclusion : It seems that IVF & ET are successful procedures in PCOS patients resistant to other usual treatment and hormonal dysfunction of this group of patients did not affect the results.
Phenomenological and Semi-microscopic Analysis for the Elastic Scattering of Protons from 12C Nuclei at Different Energies  [PDF]
Sh. Hamada, N. Amangeldi
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.45B013

Analysis of the elastic scattering of protons from 12C nuclei had been performed within the framework of both the optical model and single folding model at different proton energies; 17, 30.3, 40, 49.48 and 61.4 MeV. We have obtained the global potential parameters which could fairly reproduce the experimental data for p+12C elastic scattering at the aforementioned energies. The radial and energy dependence of the real and imaginary parts of the potential were calculated. Good agreement between experimental data and theoretical predictions in the whole angular range was obtained using both phenomenological approach (Optical Model), and semi-microscopic approach (Single Folding). In single folding calculations, the real part of the potential was calculated from a more fundamental basis by the folding method in which the NN interaction VNN(r), is folded into the density of the target nuclei and supplemented with a phenomenological imaginary potential. The obtained normalization factor Nr is in the range of 0.75 - 0.9.

Refractive Features and Diffraction Scattering Patterns Observed in the Elastic Scattering of 12C from 12C at Various Energies  [PDF]
Sh. Hamada, N. Burtebayev
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.46114

We have measured the angular distributions for 12C ion beam elastically scattered from 12C target of thickness 17.4 μg/cm2 at energies 15, 18 and 21 MeV which is close to the Coulomb barrier energy for 12C + 12C nuclear system. The elastic scattering of 12C beam on 12C was analysed also at different energies (139.5, 158.8, 180, 240, 288.6, 300, 360 and 420 MeV) from literature in order to obtain the global optical potential parameters, which could fairly reproduce the experimental data. The experimental results were analysed within the framework of both the optical model and the double folding potential obtained with different density-dependent NN interactions which give the corresponding values of the nuclear incompressibility K in the Hartree-Fock calculation of nuclear matter. The agreement between the experimental results and the theoretical predictions in the whole angular range is fairly good.

C6 α-Olefins’ Oligomers and Co-Oligomers as Synthetic Components for Petroleum Oils  [PDF]
Jeyhun Sh. Hamidova
Open Journal of Yangtze Oil and Gas (OJOGas) , 2018, DOI: 10.4236/ojogas.2018.32009
Abstract: This study investigated the results of double co-oligomerization of C6 α-olefins with dicyclopentadiene and indene Obtained oligomeric compounds of various molecular mass and composition, which were used as synthetic component of petroleum oils to improve their viscosity-temperature and anti-corrosive properties. The researches were carried out to substantiate that the possibilities of co-oligomerization in a directed synthesis are broad and that they could be used in the production of new oligomeric compounds with required properties in petrol chemistry.
Ergodicity and Invariance of Flows in Queuing Systems  [PDF]
G. Sh. Tsitsiashvili
Journal of Applied Mathematics and Physics (JAMP) , 2018, DOI: 10.4236/jamp.2018.67122
Abstract: In this paper, we investigate the flow of customers through queuing systems with randomly varying intensities. The analysis of the Kolmogorov-Chapman system of stationary equations for this model showed that it is not possible to construct a convenient symbolic solution. In this paper an attempt is made to circumvent this requirement by referring to the ergodicity theorems, which gives the conditions for the existence of the limit distribution in the service processes, but do not require knowledge of them.
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