نتایج جستجو برای: ventilation
تعداد نتایج: 47711 فیلتر نتایج به سال:
Background and purpose: In the last months of 2019, the new coronavirus infection (COVID-19) spread worldwide. This study investigated the need for mechanical ventilation in children who were admitted for COVID-19. Materials and methods: This article provides a systematic review of studies about children with COVID-19 requiring invasive or non-invasive mechanical ventilation. Electronic databa...
Background & Aim: Mechanical ventilation is one of the most common treatments in neonatal intensive care unit and is however associated with many complications. One of the ways to reduce complications is providing nursing care according to standards. This study was conducted with the aim of determining the conformity of nursing care related to weaning neonates from mechanical ventilation to the...
spreading wood particles and attached colored materials in work places can cause many problems for woodwork industry workers. the aim of this study is to design and implement a local exhaust ventilation system to control wood dust and isocyanates simultaneously. the study was conducted on 18 workers in the paint workroom of a wood door industry. at first, an overview of the workplace indoor air...
abstract background: transtracheal jet ventilation is an alternative ventilatory approach in airway surgery. the purpose of this study was to compare respiratory efficacy of percutaneous transtracheal with endotracheal, low frequency jet ventilation during microlaryngeal surgery. methods: ninety asa class i-ii patients aged between 16 and 70 years undergoing elective microlaryngeal surgery were...
in recent years, biosurfactants due to wide applications in chemical, petroleum, food andpharmaceutical industries, have been widely considered by researchers. biosurfactants are produced by aseries of microorganisms, so it is important to screen culture medium and operating conditions in miniaturized bioreactors prior to scaling up to large bioreactors.in this study, using a kind of miniaturiz...
background: cuffed pharyngeal tube is a device designed for ventilation of anesthetized patients. cpt has advantages over face mask including: maintaining of face mask can be difficult and boring after several minutes and mobility of the practitioner is reduced due to involvement of hands. mask pressure can cause soft tissue and nerve damage around the nose. anesthetic gas leakage from the mask...
Introduction Tracheobronchial foreign body aspiration is a common life-threatening condition in children. There are controversies in the management of this condition, including the type of ventilation during bronchoscopy. This study aims to compare anesthesia with controlled ventilation versus spontaneous ventilation in rigid bronchoscopy in children with foreign body aspiration. Materials...
Ventilation is a vital component of an underground mining operation, used to guarantee a safe atmosphere for workers and survive them from the hazardous and toxic gases. In the recent years, engineers have begun to apply new operation research techniques in order to optimize the ventilation systems to assist in achieving a regulatory compliance, reduce ventilation costs, and improve its efficie...
Aims and background: The difficulty of ventilation with masks is one of the most common causes of severe respiratory consequences in the field of anesthesia. Objective: To evaluate the effect of patient position, voice production and neck rejection on the Mallamapati grade, in order to predict the difficulty of ventilation with mask in patients. Materials and Methods: This research was of a pr...
Due to the increasing of closed ventilation systems used in buildings, the risk of indoor radon is increased day by day. In this study, we selected two sample rooms to calculate the radon emission coefficient from different levels, radon concentration measured when the natural ventilation was completely closed and compared with the analytical results. The results clearly show the difference in ...
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