Microjet drug delivery system

摘要

The present invention relates to a novel type of a needle-free drug delivery system in which strong energy such as a laser beam is focused inside liquid contained in a sealed pressure chamber to cause bubble growth and the volume expansion in the sealed pressure chamber due to the bubble growth so as to elongate an elastic membrane, so that an instantaneous pressure is applied to a drug solution contained in a drug microchamber adjacent to the elastic membrane to allow the drug solution to be injected in the form of a liquid microjet, thereby enabling the drug solution to rapidly and accurately penetrate into the bodily tissues of the patient.

主权项

1. A microjet drug delivery system, comprising:
a pressure chamber having a predetermined sealed accommodating space formed therein and storing a pressure-generating liquid in the sealed accommodating space; a drug microchamber disposed in proximity to and separately from the pressure chamber and configured to accommodate a drug solution in a predetermined accommodating space formed therein; an energy-focusing device disposed separately and completely outside from the sealed accommodating space and configured to focus energy to the pressure-generating liquid stored in the pressure chamber to cause bubble growth due to vaporization of the pressure-generating liquid; an elastic membrane disposed between the pressure chamber and the drug microchamber; and a micronozzle connected to one side of the drug microchamber so as to be formed as a passageway through which the drug solution stored in the drug microchamber is injected to the outside in the form of a microjet.