Effects of R[+]-8-([1-[3,4-dimethoxyphenyl]-2-hydroxyethyl]amino) -3,7-dihydro-7-[2-methoxyethyl]-1,3-dimethyl-1H-purine-2,6-dione (MKS-492), a reported type III isozyme inhibitor of cyclic nucleotide phosphodiesterase, on antigen- or platelet activating factor (PAF)-induced bronchoconstriction and allergic reactions in guinea pigs and rats were investigated. 1) MKS-492 inhibited antigen-induce...

Aminophylline can elicit thermogenesis in rats or increase metabolic rate during cold stress in lambs. We tested the hypothesis that aminophylline would reduce the change in core body temperature during laparoscopic abdominal surgery requiring pneumoperitoneum. Fifty patients were randomly divided into an aminophylline group (n=25) and a saline control group (n=25). Esophageal temperature, inde...

When calorically restricted at cool ambient temperatures, mice conserve energy by entering torpor, during which metabolic rate (MR), body temperature (T(b)), heart rate (HR), and locomotor activity (LMA) decrease. Treatment with exogenous adenosine produces a similar hypometabolic state. In this study, we conducted a series of experiments using the nonspecific adenosine receptor antagonists ami...

Peripheral chemoreceptor activity was studied in nine healthy, unsedated neonates (with a mean (SD) postconceptional age of 39 (2) weeks and birth weight of 3000 (400) g) by measuring the inhibition of ventilation elicited by five breaths of 100% oxygen (Dejours technique). Changes in tidal volume, frequency, and minute ventilation were measured before and after administration of aminophylline ...

The effects of aminophylline on pulmonary vascular tone, systemic hemodynamics, and ventricular ejection fractions reported in the literature show some discrepancies. We therefore studied in COPD patients the effects of aminophylline on hemodynamics, on ventricular ejection fractions, and on systolic and diastolic functions of each ventricle, and we measured simultaneously the blood level of th...

Background: The most common type of apnea among premature newborns is idiopathic apnea of prematurity. Recurrent apnea can lead to hypoxemia and central nervous system damage. Although caffeine and theophylline are the most commonly prescribed drugs in this field, there is disagreement about which medicine is preferred. The purpose of this study was to compare the ther...

BACKGROUND There is a lack of consensus regarding second-line therapy in children with acute asthma who fail to the standard therapy. Ketamine had bronchodilator property and may be useful in the treatment of acute asthma. OBJECTIVE The objective of this study was to evaluate the efficacy and safety of ketamine as compared to aminophylline in children with acute asthma who respond poorly to t...

Ten patients with chronic obstructive pulmonary disease without complicating cor pulmonale were studied by right and left heart catheterization. Hemodvnamic and respiratory observations were made during a control period and during the infusion of 1 g of aminophylline. Aminophylline produced a significant reduction in mean pulmonary artery pressure from 19.7 mm Hg to 14.8 mm Hg, right ventricula...

Measurement of serum theophylline concentration is usually recommended before intravenous aminophylline is given to patients taking oral theophylline. Fifty patients with worsening airflow obstruction, all of whom were taking oral theophyllines and who had no contraindication to the use of parenteral aminophylline, were randomly allocated into two groups before treatment was given. The dose of ...