Search for: pregnancy
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    Comparison characteristics of family and demographic of children with antenatal hydronephrosis between 2nd and 3rd trimesters of gestation

    , Article Iranian Journal of Public Health ; Volume 47, Issue 2 , February , 2018 , Pages 273-279 ; 22516085 (ISSN) Nazemipour, M ; Kajbafzadeh, A. M ; Mohammad, K ; Rahimi Foroushani, A ; Hojjat, A ; Seyedtabib, M ; Nazemipour, A ; Mahmoudi, M ; Sharif University of Technology
    Iranian Journal of Public Health  2018
    Background: The aim of this study was comparison characteristics of family and demographics of children with antenatal hydronephrosis, in 2nd and 3rd trimester of pregnancy, in order to the need for postnatal management. Methods: This cross-sectional study described some information from family of children with antenatal hydronephrosis, at the Pediatric Urology Research Center of Children’s Hospital Medical Center of Tehran University of Medical Sciences. Data for 193 children, admitted in 2012-2013, were collected retrospectively. They were allocated to two groups of 2nd and 3rd trimester, based on the time of diagnosis antenatal hydronephrosis. Data analysis was done using SPSS.... 

    Pregnancy related pelvic girdle pain and low back pain in an Iranian population

    , Article Spine ; Volume 32, Issue 3 , 2007 , Pages E100-E104 ; 03622436 (ISSN) Mousavi, S. J ; Parnianpour, M ; Vleeming, A ; Sharif University of Technology
    STUDY DESIGN. A cross-sectional study in pregnancy. OBJECTIVES. To differentiate between pregnancy related pelvic girdle pain (PGP) and low back pain (LBP) in Iranian women, and investigate the prevalence of each syndrome. SUMMARY OF BACKGROUND DATA. Most of the information about PGP and LBP has been obtained in Western countries. There are few studies to investigate pregnancy related lumbopelvic pain, and, especially, differentiate between PGP and LBP in non-Western countries, particularly in the Middle East. METHODS. This study included 325 pregnant women, ranging in age from 16 to 42 years. All pregnant women were interviewed using a questionnaire. Two trained physical therapists... 

    Prevention of gestational diabetes mellitus (GDM) and probiotics: Mechanism of action: A review

    , Article Current Diabetes Reviews ; Volume 16, Issue 6 , 2020 , Pages 538-545 Homayouni, A ; Bagheri, N ; Mohammad Alizadeh Charandabi, S ; Kashani, N ; Mobaraki Asl, N ; Mirghafurvand, M ; Asgharian, H ; Ansari, F ; Pourjafar, H ; Sharif University of Technology
    Bentham Science Publishers  2020
    Background: Gestational Diabetes Mellitus (GDM) is a health problem that is increasing around the world. Introduction: Prevention of GDM, rather than treatment, could have several benefits in terms of both health and economic cost. Even a slight reduction in maternal glucose in non-diabetic women, particularly in women at high risk for GDM, may have significant benefits for pregnancy results and the future health of off-springs. Probiotics are a relatively new intervention, which are assessed by mothers’ metabolism, and can reduce blood sugar levels, prevent gestational diabetes and reduce the maternal and fetal complications resulting from it. The aim of this study was to review the studies... 

    Developmental barcoding of whole mouse via homing CRISPR

    , Article Science ; Volume 361, Issue 6405 , 2018 ; 00368075 (ISSN) Kalhor, R ; Kalhor, K ; Mejia, L ; Leeper, K ; Graveline, A ; Mali, P ; Church, G. M ; Sharif University of Technology

    Transabdominal fetal heart rate detection using NIR photopleythysmography: instrumentation and clinical results

    , Article IEEE Transactions on Biomedical Engineering ; Volume 56, Issue 8 , 2009 , Pages 2075-2082 ; 00189294 (ISSN) Gan, K. B ; Zahedi, E ; Mohd Ali, M. A ; Sharif University of Technology
    In obstetrics, fetal heart rate (FHR) detection remains the standard for intrapartum assessment of fetal well-being. In this paper, a low-power (<55 mW) optical technique is proposed for transabdominal FHR detection using near-infrared photoplesthys-mography (PPG). A beam of IR-LED (890 nm) propagates through to the maternal abdomen and fetal tissues, resulting in a mixed signal detected by a low-noise detector situated at a distance of 4 cm. Low-noise amplification and 24-bit analog-to-digital converter resolution ensure minimum effect of quantization noise. After synchronous detection, the mixed signal is processed by an adaptive filter to extract the fetal signal, whereas the PPG from the... 

    Rigid-bar loading on pregnant uterus and development of pregnant abdominal response corridor based on finite element biomechanical model

    , Article International Journal for Numerical Methods in Biomedical Engineering ; Volume 36, Issue 1 , January , 2020 Irannejad Parizi, M ; Ahmadian, M. T ; Mohammadi, H ; Sharif University of Technology
    Wiley-Blackwell  2020
    During pregnancy, traumas can threaten maternal and fetal health. Various trauma effects on a pregnant uterus are little investigated. In the present study, a finite element model of a uterus along with a fetus, placenta, amniotic fluid, and two most effective ligament sets is developed. This model allows numerical evaluation of various loading on a pregnant uterus. The model geometry is developed based on CT-scan data and validated using anthropometric data. Applying Ogden hyper-elastic theory, material properties of uterine wall and placenta are developed. After simulating the “rigid-bar” abdominal loading, the impact force and abdominal penetration are investigated. Findings are compared... 

    Applicability of adaptive noise cancellation to fetal heart rate detection using photoplethysmography

    , Article Computers in Biology and Medicine ; Volume 38, Issue 1 , 2008 , Pages 31-41 ; 00104825 (ISSN) Zahedi, E ; Beng, G. K ; Sharif University of Technology
    In this paper, an approach based on adaptive noise cancellation (ANC) is evaluated for extraction of the fetal heart rate using photoplethysmographic signals from the maternal abdomen. A simple optical model is proposed in which the maternal and fetal blood pulsations result in emulated signals where the lower SNR limit (fetal to maternal) is - 25 dB. It is shown that a recursive least-squares algorithm is capable of extracting the peaks of the fetal PPG from these signals, for typical values of maternal and fetal tissues. © 2007 Elsevier Ltd. All rights reserved  

    Interaction analysis of a pregnant female uterus and fetus in a vehicle passing a speed bump

    , Article Journal of Biomechanics ; Volume 118 , March , 2021 ; 00219290 (ISSN) Irannejad Parizi, M ; Ahmadian, M. T ; Mohammadi, H ; Sharif University of Technology
    Elsevier Ltd  2021
    Pregnant vehicle occupants experience relatively large acceleration when the vehicle passes a speed-bump. In this paper, the effect of such sudden acceleration on a pregnant uterus is investigated. A biomechanical model representing the fundamental dynamic behaviors of a pregnant uterus has been developed. The model relates to the 32nd week of gestation when the fetus is in head-down, occipito-anterior position. Considering the drag and squeeze effects of the amniotic fluid, we derive a comprehensive differential equation that represents the interaction of the uterus and fetus. Solving the governing equation, we obtain the system response to different speed-bump excitations. Using the fetal... 

    Antepartum fetal heart rate feature extraction and classification using empirical mode decomposition and support vector machine

    , Article BioMedical Engineering Online ; Volume 10 , 2011 ; 1475925X (ISSN) Krupa, N ; MA, M. A ; Zahedi, E ; Ahmed, S ; Hassan, F. M ; Sharif University of Technology
    Background: Cardiotocography (CTG) is the most widely used tool for fetal surveillance. The visual analysis of fetal heart rate (FHR) traces largely depends on the expertise and experience of the clinician involved. Several approaches have been proposed for the effective interpretation of FHR. In this paper, a new approach for FHR feature extraction based on empirical mode decomposition (EMD) is proposed, which was used along with support vector machine (SVM) for the classification of FHR recordings as 'normal' or 'at risk'.Methods: The FHR were recorded from 15 subjects at a sampling rate of 4 Hz and a dataset consisting of 90 randomly selected records of 20 minutes duration was formed from... 

    Low back pain in Iran: A growing need to adapt and implement evidence-based practice in developing countries

    , Article Spine ; Volume 36, Issue 10 , 2011 , Pages E638-E646 ; 03622436 (ISSN) Mousavi, S. J ; Akbari, M. E ; Mehdian, H ; Mobini, B ; Montazeri, A ; Akbarnia, B ; Parnianpour, M ; Sharif University of Technology
    Study Design.: A descriptive overview of the literature. Objective.: To present a comprehensive descriptive overview of the published papers about epidemiologic features, burden, and current management of low back pain (LBP) in Iran. Summary OF Background Data.: Little is known about the epidemiology, burden, and management of LBP in developing and low- to middle-income countries, such as Iran. Methods.: A literature search was carried out using MEDLINE database to assess existing literature about prevalence, disease burden, impact, and current management of nonspecific LBP in Iran. Results.: Twenty-six articles matched inclusion criteria and included in the study. The findings related to... 

    Fabrication of porous gelatin-chitosan microcarriers and modeling of process parameters via the RSM method

    , Article International Journal of Biological Macromolecules ; Volume 88 , 2016 , Pages 288-295 ; 01418130 (ISSN) Karimian, S. A. M ; Mashayekhan, S ; Baniasadi, H ; Sharif University of Technology
    Elsevier B.V 
    Porous gelatin-chitosan microcarriers (MCs) with the size of 350 ± 50 μm were fabricated with blends of different gelatin/chitosan (G/C) weight ratio using an electrospraying technique. Response surface methodology (RSM) was used to study the quantitative influence of process parameters, including blend ratio, voltage, and syringe pump flow rate, on MCs diameter and density. In the following, MCs of the same diameter and different G/C weight ratio (1, 2, and 3) were fabricated and their porosity and biocompatibility were investigated via SEM images and MTT assay, respectively. The results showed that mesenchymal stem cells (MSCs) could attach, proliferate, and spread on fabricated porous MCs... 

    Prevalence of influenza a infection in the middle-east: a systematic review and meta-analysis

    , Article Clinical Respiratory Journal ; Volume 12, Issue 5 , 2018 , Pages 1787-1801 ; 17526981 (ISSN) Moghoofei, M ; Monavari, H. R ; Mostafaei, S ; Hadifar, S ; Ghasemi, A ; Babaei, F ; Kavosi, H ; Tavakoli, A ; Javanmard, D ; Esghaei, M ; Khodabandehlou, N ; Sharif University of Technology
    Blackwell Publishing Ltd  2018
    Objective: This systematic review and meta-analysis was performed to determine the prevalence rate of influenza virus from different parts of Middle East region, and present an overall relative frequency (RF) for this region. Methods: The authors performed a systematic literature review from several reliable databases such as PubMed, ISI Web of Science and Scopus during 2000–2016. Furthermore, the keywords of this research were ‘Influenza’, ‘Subtype’, ‘Seroprevalence’, ‘Incidence’, ‘Seroepidemiology’, ‘H1N1’, ‘H3N2’, ‘H5N1’, ‘H9N2’, ‘Middle-East’ and ‘Meta-analysis’. The reported data were selected according to inclusion and exclusion criteria. Results: The authors selected 71 studies out of...