فهرست مطالب

  • Volume:18 Issue: 2, 2020
  • تاریخ انتشار: 1399/05/19
  • تعداد عناوین: 5
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  • Hassan Niroomand, MohammadReza Mirzaii Dizgah * Page 1
    Background

    Family planning is one of the important needs of reproductive health care. For years, stable, reliable, reversible, accessible, and cost-effective methods have been desirable for this purpose. Vasectomy is often considered as the most common contraceptive method, due to the highly effective reversal success rate.

    Objectives

    With the excellent patency and pregnancy rates, the microsurgical end-to-end vasovasostomy procedure has been recognized as a more common method for vasectomy reversal.

    Methods

    Here we reviewed and analyzed the records of our experience of Modified Double-Layer microsurgical technique (MDLT) for the vasovasostomy procedure (n = 30) compared with the Three-Layer technique (TLT) (n = 24) during 3 years. The statistical analyses were carried out using SPSS (V. 15.0), and a value of P < 0.05 was considered significant.

    Results

    In this report, 54 participants underwent TLT-VV (group 1) and MDLT-VV (group 2). There was no significant difference in the causes of vasectomy reversal between the two groups (P value = 0.392). There was no significant difference between study groups in the fertility history (P value = 0.561), the presence of a sperm granuloma (P value = 0.21), underlying diseases (P value = 0.345) and demographic characteristics. We observed a 94% (51/54) patency rate and a 40.7% (22/54) pregnancy rate without any need for Assisted Reproductive technique (ART).

    Conclusions

    The microscopic vasectomy reversal operation brings advantages to family planning and sexual health. High throughput return fertility, without any need for ART, places this technique in the first step of family planning. It seems Modified Double-Layer technique may be considered as the first step of microscopic vasovasostomy.

    Keywords: Family Planning, Microscopic Vasovasostomy, Vasectomy Reversal, Modified Double-Layer Microsurgical Technique
  • Farzaneh Montazerifar *, Mansour Karajibani, Razieh Hosseini, Aliyeh Tafazzoli, Ahmad Bolouri Page 2
    Background

    Metabolic syndrome (MetS) is closely related to the risk of cardiovascular disease (CVD), particularly in stressful occupations. Firefighting is a hazardous profession and is associated with high metabolic risk. However, limited studies on firefighters are available.

    Objectives

    This study aimed to determine the prevalence of MetS among firefighters in Zahedan city, Iran.

    Methods

    This cross-sectional study was performed on 140 firefighters (age range, 16 - 55 years) employed at the fire department in Zahedan city, southeast Iran. Anthropometric characteristics and metabolic risk parameters, including blood pressure (BP), fasting blood sugar (FBS), and lipid profile were measured, and the prevalence of metabolic syndrome was assessed based on National Cholesterol Education Program Adult Treatment Panel III (NCEP ATP III) criteria.

    Results

    MetS was presented in 47 (33.6%) of the firefighters. Among the metabolic risk factors, abdominal obesity (87.1%), low-high density lipoprotein (HDL-C) (62.1%), and hypertriglyceridemia (61.4%) were more prevalent. Moreover, a significant increasing trend was found with increasing age and work experience (both, P = 0.05). However, no significant differences were found for the remaining metabolic risk factors.

    Conclusions

    The findings showed that about one-third of the firefighters had MetS. Age, abdominal obesity, and dyslipidemia were independent risk factors for MS in the firefighters. Thus, efforts should be undertaken to implement healthy lifestyle promotion programs for firefighters.

    Keywords: Metabolic Syndrome, Iran, Firefighters
  • Sirous Azizi, Afsaneh Dadarkhah, Alireza Asgharpour Masouleh * Page 3
    Background

    The development of virtual human models has recently gained considerable attention in biomechanical studies intending to design for ergonomics. The computer-based simulations of virtual human models can reduce the time and cost of the design cycle. There is an increasing interest in finding the realistic posture of the human body with applications in prototype design and reduction of injuries in the workplace.

    Objectives

    This paper presents a generic method based on a multi-objective optimization (MOO) for posture prediction of a sagittal-plane lifting task.

    Methods

    Improved biomechanical models are used to formulate the predicted posture as a MOO problem. The lifting task has been defined by seven performance measures that are mathematically represented by the weighted sum of cost functions. Specific weights are assigned for each cost function to predict both stoop and squat type postures. Some inequality constraints have been used to ensure that the virtual human does not assume a completely unrealistic configuration.

    Results

    The method can predict the hand configuration effectively. Simulations reveal that predicting a squat posture requires the minimization of certain objective functions, while these measures are less significant for the prediction of a stooped posture.

    Conclusions

    In this study, a MOO-based posture prediction model with a validation process is presented. We employed a three-dimensional model to evaluate the applicability of using a combination of seven performance measures to the posture prediction of symmetric lifting tasks. Results have been compared with the available empirical data to validate the simulated postures. Furthermore, the assigned weights are obtained for a range of percentiles from 50% male to 90% female according to the postures obtained by 3D SSPPTM software.

    Keywords: Validation, Lifting, Posture Prediction, Multi-Objective Optimization
  • Faisal Muhammad * Page 4
  • Babak Daneshfard, Nafiseh Hosseini Yekta * Page 5