0 a small round lump of a substance, especially partly digested food: --
1 a single dose (= measured amount) of a drug: --
Patients were given boluses of 20 or 30 μg of fentanyl.
Salivary gland secretion is reduced; mastication to prepare food is increased, as is the time required to prepare the bolus.
Effects of verbal cue on bolus flow during swallowing.
The custom bolus reduces air gaps or other variations in thickness seen with standard flat sheets of bolus material.
However, the cost of a sufficient number of boluses to treat adult cattle could be prohibitive.
Bolus doses are not more effective or safer than infusion.
Smaller doses, smaller rates of infusion or repeated small boluses are advisable.
It has a rapid onset of action, which persists for around one hour after a bolus injection.
Checking if bolus material was not forgotten can not be done systematically; it was only counted if the radiation technologist reported it.
