Miri S M, Heidarzadeh C, Fakhr Tabatabai S A, Ghanaati H,
Volume 62, Issue 4 (11 2004)
Abstract
Background: This investigation was conducted in order to study angiographic findings in patients with cerebral aneurysm.
Materials and Methods: The study conducted on 136 cases of ruptured cerebral aneurysms between 1995-2000 confirmed by means of 4-vessel cerebral angiography to get an insight to racial, geographic and environmental factors predisposing to the occurrence of subarachnoid hemorrhage and aneurysm formation. Results: The data analysis revealed the following
Results: 58% of the population comprised of male and 42% female with a mean age of 46 years. 89% of the aneurysms were found in the anterior circulation and 11% occurred in the posterior cerebral circulation. The most common site in both the sexes was the anterior communicating artery. 9.6% of the patients displayed two separate aneurysms. 5.2% of the aneurysms were found to be giant aneurysms and 3% of the patients had fusiform aneurysms.
Conclusion: The low average age, a predilection in male population and the prevalence of aneurysms at carotid and middle cerebral artery bifurcation and the distal branches of anterior cerebral artery and a higher incidence of anterior communicating artery in women were the findings observed in this study.
Heidarzadeh S, Pourmand Mr, Ghasemi A, Zarrinfar H, Saber S, Soori T, Mirhendi Sh, Hosseini M, Khalifehgholi M, Mardani N, Eshraghi Ss,
Volume 69, Issue 9 (6 2011)
Abstract
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MicrosoftInternetExplorer4
Background: Nocardiosis is a rare and potentially
life-threatening infection caused by several species of the Nocardia genus. The objective of this study was to develop and evaluate a rapid and new method to clinically identify relevant Nocardia species. Rapid and accurate diagnosis of Nocardia species is essential
for the treatment of severe infections and prevention of cerebral abscess.
Methods: One hundred and eighty patients, 103 (57.22%) male and 77 (42.78%) female, with severe symptomatic
pulmonary infection were studied in the course of a 12-month period in Dr.
Shariati Teaching Hospital affiliated to Tehran University of Medical Sciences
in 2010. The specimens were cultured and identified
using microbiological and biochemical tests. Polymerase chain reaction (PCR) was used to directly identify the organism in the
broncoalveolar lavage samples collected from the patients. NG1 and NG2 primers were used to amplify a Nocardia genus-specific 598-bp fragment of 16S rRNA.
Results: Nineteen samples (10.56%) were positive with PCR and 5 samples (2.78%) with conventional methods. All
samples with positive cultures were also positive by PCR.
Conclusion: The results of this study showed that PCR has a high
sensitivity and accuracy for the detection of Nocardia compared with
culture and biochemical tests. Considering the rapidity, precision, high
sensitivity and specificity of molecular techniques, use of these techniques is
suggested in conjunction with conventional methods for the detection of Nocardia phenotypes in clinical laboratories and research centers.
Mohammad Ali Heidarnia , Alireza Abadi , Mohamad Fsmaeil Motlagh, Mohammad Heidarzadeh , Abbas Habibelahi , Farima Raji ,
Volume 74, Issue 7 (October 2016)
Abstract
Background: The first duty of any government is to ensure the health of its children and neonates. Today's countries are classified as declining mortality in this group. To increase neonatal survival rate, classified causes of newborn mortality are the core strategy and policies. This study was aimed to determine the classification of causes of neonatal death in Iran.
Methods: Neonatal mortality refers to deaths of young children. It is measured by the neonatal mortality rate (NMR), which is the number of deaths of neonates per 1000 live births. This study was used data from 11693 neonatal deaths (from 22 weeks gestational age to neonatal death less than 30 days), in Iran's hospitals in 2012 that registered in the perinatal mortality surveillance system (hospital-based system). Demographic characteristics and other factors associated with neonatal death were investigated. To aid in cause of death analysis, burden of disease analysis, and comparative risk assessment we classified the causes of death according to international statistical classification of diseases version 10 (ICD 10), divided into three cause mortality strata.
Results: Results showed the most common cause of neonatal mortality was "certain conditions originating in the perinatal period" (77.92%) with the highest incidence of "disorders related to length of gestation and fetal growth" (37.7%) in this group. Also it shows that 20.82% of deaths caused by "congenital malformations, deformations and chromosomal abnormalities" and 1.26% cases had occurred as a result of "accidents and injuries". The greatest cause of death in the neonates with weight over one thousand grams was "certain conditions originating in the perinatal period" (71.29%), with the highest percentage in the disorders related to "length of gestation and fetal growth" (29.65%).
Conclusion: According to this study the "certain conditions originating in the perinatal period" special "disorders related to length of gestation and fetal growth" was the main cause of neonatal mortality. Also "congenital malformations, deformations and chromosomal abnormalities" was the second cause of neonatal mortality.
Ghasem Janbabai, Amir Hashem Shahidi Bonjar , Abtin Heidarzadeh, Mahdi Shadnoush , Ghasem Sadeghi, Mohsen Dalband, Amir Reza Rokn, Hamid Samadzadeh, Ali Tajernia, Said Sai, Reza Masaeli, Gholamreza Heydari, Ali Yazdani , Behzad Houshmand ,
Volume 79, Issue 2 (May 2021)
Abstract
Background: The advent of Severe Acute Respiratory Syndrome Coronavirus 2 (so-called SARS-CoV-2) causing Coronavirus Disease 2019 (so-called COVID-19) occurred in Dec. 2019 in Wuhan, China. Having an inconceivable worldwide contagion, the outbreak was labeled a pandemic by the WHO. Dental services and related professions (including dentists, dental assistants, dental hygienists and the personnel of cleansing, remedial, triage, dental laboratories, radiographic laboratories and other related paraclinicals), facing galore aerosol and droplets, are in the topmost risk groups exposed to the queer virus. This study was fulfilled to round up evidence-based data to break a link at any part of the virus transmission chain in dental services and related professions.
Methods: Relevant online databases, as PubMed, MEDLINE, Embase, Scopus, Google Scholar and TripDatabase were searched meticulously and evaluated for relevant published original research papers. Subsequently, to fulfill the investigation, ADA, CDC and WHO websites were reviewed to gain relevant guidelines and protocols. Consequently, 476 resources were included considering the canonical inclusion criteria. For the sake of quality assessment of the resources, an authentic checklist was exploited to score the resources from 1 to 15, wherein the admissible score was 10. After deliberation of resources, 366 of them were excluded and finally, 110 resources were selected and overhauled to attain a comprehensive perception on the subject of the investigation.
Results: Transmission of SARS-CoV-2 includes direct transmission (via droplet and aerosol inhalation) and indirect transmission (via surface and instrument contamination), which can amply occur in dental services and related professions. Therefore, an all-inclusive evidence-based miscellany was rallied on several exigent topics, containing genuine esteem in reputable scientific authorities, to present a consummate report for the dental clinicians and related practitioners, working in the course of the running pandemic.
Conclusion: Contemplating the ongoing crisis, undertaking a set of miscellany elected guidelines and protocols, is indispensable in this vital interval of history to bridle the current pandemic, which has been abridged via this systematic perusal. |
