aminophylline/fatigue

We examined the influence of intravenously infused aminophylline on the contractility of the sternomastoid muscle in 8 subjects. The muscle was stimulated directly using bipolar surface electrodes at 1, 10, 20, and 50 pulses per second (pps), and the force response was recorded. The ratio of force

The effect of intravenous aminophylline on the contractility of the sternomastoid muscle was measured in the fresh state and after the induction of significant fatigue in five normal subjects. Fatigue was produced by repetitive isometric neck flexion, for two seconds every four seconds at 70% of the

BACKGROUND Diaphragmatic fatigue may contribute to the development of respiratory failure. Although aminophylline administered IV has been widely used to treat diaphragmatic fatigue, to date it has not been used in aerosol formulation for this purpose. OBJECTIVE The aim of this study was to assess

The effects of aminophylline on diaphragmatic fatigue and recovery in the face of hypoxemia and hypercapnic acidosis were studied in anesthetized, spontaneously breathing, dogs. The phrenic nerves were stimulated supramaximally at 10, 20, 50, and 100 Hz during 2 s with electrodes placed around the

BACKGROUND Diaphragmatic fatigue causes respiratory failure, for which aminophylline has been used as therapy. Because the mechanism of action of aminophylline in reversing diaphragmatic fatigue is unclear, we used in vivo 31P magnetic resonance spectroscopy (MRS) to determine the relation between

The effects of two different concentrations of aminophylline, 50 microM/L and 500 microM/L on muscle fatiguability were tested using frog gastrocnemius-sciatic preparations. Two stimulation protocols, one high energy demand, and the other low energy demand were used to induce muscle fatigue. The

The effects of acute and chronic administrations of aminophylline (AM) on diaphragm contractility and fatigue resistance were examined in 42 rats. In acute experiments (n = 22), the animals received an intravenous bolus of either AM (14 mg/kg; n = 11) or saline (n = 11). Serum AM level was

1. The effect of intravenous aminophylline on the contractility of adductor pollicis has been studied in three subjects both in the fresh state and following the induction of muscle fatigue. 2. Aminophylline had no influence on the frequency-force relationship and relaxation rate of adductor

Effect of aminophylline on the fatigue of inspiratory muscles and ventilation disorders induced by respiratory resistive load was studied in cats. The administration of aminophylline on the background of inspiratory fatigue increases transdiaphragm pressure, restores bioelectric activity of

OBJECTIVE To compare the therapeutic effect of Shenmai injection (SM) and aminophylline (AP) on diaphragm fatigue in chronic obstructive pulmonary disease (COPD). METHODS Sixty-four COPD patients with respiratory failure and diaphragm fatigue were randomly divided into 2 groups: (1) SM group (33

The clinical relevance of methylxanthines as therapeutic agents for improving diaphragmatic contractility is controversial. In a double-blind, placebo-controlled trial, we investigated the effect of aminophylline on the contractility of fresh and fatigued human diaphragm at different lung volumes,

1. The effect of aminophylline and terbutaline sulfate, separately and in combination, on the contractility of the feline diaphragm was investigated. 2. Diaphragmatic contractility increased significantly (P less than 0.05) to 28.3% above control level as long as theophylline plasma levels were

Studies in adult animal and human subjects have suggested that the methylxanthine drugs can delay the onset or attenuate the severity of diaphragmatic fatigue. We have investigated the effect of aminophylline and caffeine on the pressure-generating capacity of the fatigued diaphragm in 1-mo-old