نتایج جستجو برای: photoelectric factor pef

تعداد نتایج: 852645  

Journal: :Thorax 2012
Jonathan M Feldman Haley Kutner Lynne Matte Michelle Lupkin Dara Steinberg Kimberly Sidora-Arcoleo Denise Serebrisky Karen Warman

BACKGROUND Failure to detect respiratory compromise can lead to emergency healthcare use and fatal asthma attacks. The purpose of this study was to examine the effect of predicting peak expiratory flow (PEF) and receiving feedback on perception of pulmonary function and adherence to inhaled corticosteroids (ICS). METHODS The sample consisted of 192 ethnic minority, inner-city children (100 Pu...

Journal: :Journal of epidemiology 2008
Lu Ma Masayuki Shima Yoshiko Yoda Hirono Yamamoto Satoshi Nakai Kenji Tamura Hiroshi Nitta Hiroko Watanabe Toshiyuki Nishimuta

BACKGROUND The effects of airborne particulate matter (PM) are a major human health concern. In this panel study, we evaluated the acute effects of exposure to PM on peak expiratory flow (PEF) and wheezing in children. METHODS Daily PEF and wheezing were examined in 19 asthmatic children who were hospitalized in a suburban city in Japan for approximately 5 months. The concentrations of PM les...

1999
Jeffrey P. Brown Anders O. Wistrom

In primary effluent filtration (PEF), primary effluent is treated to reduce TSS, BOD, or other contaminants without resorting to secondary treatment in trickling filters or activated sludge basins. If PEF can meet the effluent quality requirements applicable to a wastewater stream, substantial cost reductions can be realized by using PEF instead of secondary treatment. In other instances, PEF c...

Journal: :The European respiratory journal. Supplement 1997
P H Quanjer M D Lebowitz I Gregg M R Miller O F Pedersen

The use of peak flow meters has been widely adopted for monitoring patients with asthma. The Working Party of the European Respiratory Society (ERS) has solely addressed technical and physiological issues relating to peak expiratory flow (PEF) (flow describes the rate of change of volume (volume rate), so that flow rate is equivalent to volume acceleration. Hence, PEF should be used in preferen...

2012
Javad Shakeri Omalbanin Paknejad Keivan Gohari Moghadam Maryam Taherzadeh

BACKGROUND Using peak expiratory flow (PEF) as an alternative to spirometry parameters (FEV1 and FVC), for detection of airway reversibility in diseases with airflow limitation is challenging. We developed logistic regression (LR) model to discriminate bronchodilator responsiveness (BDR) and then compared the results of models with a performance of >18%, >20%, and >22% increase in ΔPEF% (PEF ch...

Journal: :The Biochemical journal 2005
Ravikiran Ravulapalli Beatriz Garcia Diaz Robert L Campbell Peter L Davies

Calpains 1 and 2 are heterodimeric proteases in which large (relative molecular mass M(r) 80000) and small (M(r) 28000) subunits are linked through their respective PEF (penta-EF-hand) domains. The skeletal muscle-specific calpain 3 is believed not to form a heterodimer with the small subunit but might homodimerize through its PEF domain. Size-exclusion chromatography and analytical ultracentri...

2016
Malcolm J. Price A. E. Ades Nicky J. Welton Ian Simms John Macleod Paddy J. Horner

BACKGROUND Pelvic inflammatory disease (PID) is a leading cause of both tubal factor infertility and ectopic pregnancy. Chlamydia trachomatis is an important risk factor for PID, but the proportion of PID cases caused by C. trachomatis is unclear. Estimates of this are required to evaluate control measures. METHODS We consider 5 separate methods of estimating age-group-specific population exc...

2003
William Curry

Interpolation methods frequently deal poorly with noise. Least-squares based interpolation methods can deal well with noise, as long as it is Gaussian and zero-mean. When this is not the case, other methods are needed. I use an iteratively-reweighted least-squares scheme to interpolate both regular and sparse data with non-stationary prediction-error filters. I show that multi-scale methods are...

Journal: :Occupational medicine 2009
Vicky C Moore Paul Cullinan Steven Sadhra P Sherwood Burge

AIMS To study serial peak expiratory flow (PEF) responses in a group of symptomatic detergent enzyme-exposed workers. METHODS Workers were recruited from a biological detergent formulating and packaging company. Those with occupational asthma symptoms and/or specific IgE to a detergent enzyme were asked to complete 2 hourly PEF measurements for 4 weeks. Outputs from the Oasys program (Oasys s...

Journal: :Thorax 1989
R Beasley M Cushley S T Holgate

To determine whether routine assessment of peak expiratory flow (PEF) in association with a self management plan based on inhaled corticosteroid use is effective in the management of chronic asthma, 36 consecutive adult patients with asthma attending an outpatient chest clinic were admitted to an open prospective study. Patients were treated with inhaled salbutamol and beclomethasone dipropiona...

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