BACKGROUND We hypothesized that ephedrine and phenylephrine are equal with respect to uterine and placental haemodynamics and fetal acid-base status after exposure to maternal hypoxaemia and hypotension in a chronic sheep model of increased placental vascular resistance (R(UA)). METHODS At 114-135 days gestation, chronically instrumented fetal sheep underwent placental embolization leading to...

L-ephedrine is widely used in pharmaceutical preparations as a decongestant and anti-asthmatic compound. One of the key intermediates in its production is L-phenylacetylcarbinol (L-PAC) which can be obtained either from plants (Ephedra sp.), chemical synthesis involving resolution of a racemic mixture, or by biotransformation of benzaldehyde using various yeasts. In the present review, recent s...

Given the underlying assumption that reasonable maternal hemodynamics can be achieved with either ephedrine or phenylephrine, this focused meta-analysis addresses the impact of vasopressor choice on resultant neonatal Apgar scores during regional anesthesia. The literature was systematically searched for randomized trials of obstetric vasopressor use employing standard search tools. Only the hi...

Microwave irradiation of chloroacetylarenes and enamines induced an aza-Darzens reaction followed by rearrangement of the aziridinium intermediate to give (2-amino-3-alkenoyl)arenes that were reduced selectively to syn-beta-aminoalcohols as pseudo-ephedrine analogues.

The warmest interscapular skin areas were located by thermography in six healthy subjects during ephedrine-induced thermogenesis. In these interscapular areas, and in lumbar control areas, the skin temperature, subcutaneous temperature and adipose tissue blood flow were measured before and during ephedrine-induced thermogenesis. The skin and subcutaneous temperatures increased in the interscapu...

maximum percent increase for each patient after the test drug on each of the three days. On day 1, the response of the FEV, to fenoterol was better than that to ephedrine to a highly significant degree ( P < 0.01) at all times from one to six hours (Fig 1) . This degree of difference was found at two, three. and four hours on day 45, and only at three and four hours on day 90 (Fig 2). The respo...

Herb Ephedra (Ma Huang in Chinese) and Ramulus Cinnamomi (Gui Zhi in Chinese) are traditional Chinese herbs, often used together to treat asthma, nose and lung congestion, and fever with anhidrosis. Due to the adverse effects of ephedrine, clinical use of Ma Huang is restricted. However, Gui Zhi extract has been reported to decrease spontaneous activity in rats and exert anti-inflammatory and n...