Does ultrasound guidance improve the success rate of a perivascular axillary plexus block?
Ultrasonographic guidance improves the overall success rate of axillary blocks in comparison to a transarterial technique.
Repeated administration of St John's wort significantly decreased the bioavailability of R- and S-verapamil. This effect is caused by induction of first-pass CYP3A4 metabolism, most likely in the gut, because the jejunal permeability and the terminal half-life were unchanged for both enantiomers.