نتایج جستجو برای: fvc
تعداد نتایج: 4963 فیلتر نتایج به سال:
BACKGROUND The forced vital capacity (FVC) test is routinely performed to evaluate pulmonary function in patients with chronic obstructive pulmonary disease (COPD). However, the influence of the FVC maneuver on the cardiovascular system of patients with COPD is poorly understood. OBJECTIVES To analyze the behavior of heart rate (HR), blood pressure (BP) and heart rate variability (HRV) during...
مقدمه: بیماری دیابت علت اصلی نابینایی، نارسایی پیشرفته کلیه و قطع عضو در جمعیت بزرگسال می باشد. به دلیل از کارافتادگی ناشی از عوارض این بیماری و هزینه درمانی بسیار بالا، از عمده ترین مشکلات بهداشتی درمانی انسان ها است. با وجود مطالعات زیادی که درباره عوارض قلبی-عروقی، نفروپاتی، رتینوپاتی و نوروپاتی دیابتی انجام شده است، عوارض ریوی دیابت بسیار کم شناخته شده است. مطالعات انجام شده در این زمینه حا...
The alterations in vegetation cover the Three North Protection Forest Project area influence its ecological and environmental management. It helps to study soil erosion, change, ecosystem protection provide basic data support. Based on Google Earth Engine cloud platform, this paper selects MODIS 3Q1 from 2000–2020 uses image element dichotomous model estimate fractional (FVC) of area, evaluates...
OBJECTIVES A decrement in evoked muscle force with repetitive nerve stimulation (fade) suggests impaired neuromuscular transmission. We tested the hypothesis that fade of pulmonary function, ie, a decrease in values of FVC with the second spirometric maneuver compared to the first maneuver, occurs during impaired neuromuscular transmission. DESIGN Prospective study. PARTICIPANTS Six healthy...
BACKGROUND The assessment of treatment response in idiopathic pulmonary fibrosis (IPF) is complicated by the variable clinical course. We examined the variability in the rate of disease progression and evaluated the effect of continued treatment with pirfenidone in patients who experienced meaningful progression during treatment. METHODS The source population included patients enrolled in the...
Background: The Boston Early-Onset COPD study showed that current or ex-smoking first degree relatives of severe early onset COPD probands have significantly lower forced expiratory volume in 1 second (FEV1) and FEV1/forced vital capacity (FVC) values than current or ex-smoking control subjects, which suggests the existence of genetic risk factors for the development of COPD in response to ciga...
مقدمه: شواهد همه گیر شناسی نقش سبک زندگی" کم تحرک وفعال" را بر افت کارایی تنفسی خاطر نشان می کند اما نقش الگوهای متفاوت ورزشی درافزایش یابهبودکارایی عملکرد تنفسی کاملا مشخص نیست. هدف از این مطالعه، بررسی اثر تمرین ورزش ایروبیک طولانی مدت برروی شاخص های تنفسی(fvc,fev1,fvc/fev1,mvv,) زنان ورزشکار وغیر ورزشکار سالم می باشد. مواد وروشها: 15 زن ورزشکار ایروبیک باسابقه ورزشی 2 سال با میانگین دامنه سن...
Preoperative pulmonary function assessment is used to select surgical candidates and predict the occurrence of postoperative complications. The present study enrolled 1210 gastric cancer patients (949 males and 261 females). Forced vital capacity (FVC) and maximal voluntary ventilation (MVV) were measured as a percent of predicted values. We then analyzed associations between patient pulmonary ...
Linear spectral mixture analysis (SMA) is commonly used to infer fractional vegetation cover (FVC), especially for pixel dichotomy models. However, several sources of uncertainty including normalized difference vegetation index (NDVI) saturation and selection of endmembers inhibit the effectiveness of SMA for the estimation of FVC. In this study, Moderate-resolution Imaging Spectroradiometer (M...
OBJECTIVES Reference values for lung function tests differ in samples from different countries, including values for preschoolers. The main objective of this study was to derive reference values in this population. METHODS A prospective study was conducted through a questionnaire applied to 425 preschool children aged 3 to 6 years, from schools and day-care centers in a metropolitan city in B...
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