Automatic liquid injection system and method
First Claim
1. A method of administering to patients by injection or infusion a suspension of microparticles homogeneously distributed in an aqueous liquid carrier by means of an injector system comprising a syringe containing said suspension and a power driven piston for injecting said suspension into a patient, characterised by subjecting the suspension in the syringe to a rotation or rocking motion, thereby maintaining said suspension homogeneous by preventing segregation of the microparticles by gravity or buoyancy, this being without damaging said particles or disturbing their distribution.
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Accused Products
Abstract
A power assisted method and injector device for controllably delivering to patients a dispersion medicament or diagnostically active agent, the homogeneity of which is preserved throughout delivery. Diagnostically active agents disclosed are gas microbubble suspensions useful in ultrasonic diagnostic imaging and liposomal formulations in which liposome vesicles are loaded with iodinated compounds.
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Citations
38 Claims
- 1. A method of administering to patients by injection or infusion a suspension of microparticles homogeneously distributed in an aqueous liquid carrier by means of an injector system comprising a syringe containing said suspension and a power driven piston for injecting said suspension into a patient, characterised by subjecting the suspension in the syringe to a rotation or rocking motion, thereby maintaining said suspension homogeneous by preventing segregation of the microparticles by gravity or buoyancy, this being without damaging said particles or disturbing their distribution.
- 10. An injector system for administering to patients by injection or infusion a suspension of microparticles in an aqueous liquid carrier, said system comprising a syringe (22) whose barrel (25) contains said suspension, and automatic electromechanical power means (24, 31, 34) controllably acting on the syringe to inject the suspension into a patient, characterised in that said injector system further comprises means (30a, 30b) for agitating said microparticles in said suspension, said agitation keeping said suspension homogenous by preventing segregation of said particles by gravity or buoyancy without damaging said particles or disturbing their distribution.
Specification