US 11,883,634 B2
Electrohydraulic microjet drug delivery device
Seok Soon Lee, Jinju-si (KR); Jin Kyu Choi, Gimhae-si (KR); Han Bin Kang, Jinju-si (KR); Seung Min Tak, Jinju-si (KR); and In Seok Baek, Geoje-si (KR)
Assigned to MEDIJET CO., LTD., Jinju-si (KR)
Appl. No. 17/045,676
Filed by MEDIJET CO., LTD., Jinju-si (KR)
PCT Filed Apr. 4, 2019, PCT No. PCT/KR2019/003974
§ 371(c)(1), (2) Date Oct. 6, 2020,
PCT Pub. No. WO2019/198971, PCT Pub. Date Oct. 17, 2019.
Claims priority of application No. 10-2018-0040865 (KR), filed on Apr. 9, 2018.
Prior Publication US 2021/0023304 A1, Jan. 28, 2021
Int. Cl. A61M 5/30 (2006.01); A61M 5/31 (2006.01)
CPC A61M 5/30 (2013.01) [A61M 5/31 (2013.01); A61M 2005/3128 (2013.01); A61M 2205/8262 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An electrohydraulic microjet drug delivery device, comprising:
a discharge body provided with a power supply unit in which electric energy is stored; and
a medicinal fluid delivery body detachably attached to the discharge body, the medicinal fluid delivery body including a pressure generation unit configured to store a pressure generation liquid, a medicinal fluid storage unit configured to store a medicinal fluid, an elastic separation membrane installed between the pressure generation unit and the medicinal fluid storage unit and configured to separate the pressure generation liquid and the medicinal fluid, a pair of electrodes installed inside the pressure generation unit so as to be submerged in the pressure generation liquid and configured to be connected to the power supply unit, a discharger provided between the pair of electrodes and installed inside the pressure generation unit so as to be submerged in the pressure generation liquid and configured to generate a spark using the electric energy stored in the power supply unit, wherein a thickness of the discharger is thinner than a thickness of each of the pair of electrodes, and a nozzle kept in communication with the medicinal fluid storage unit, and
wherein when the spark is generated in the discharger, a part of the pressure generation liquid is vaporized and expanded to deform the elastic separation membrane toward the medicinal fluid storage unit so that the medicinal fluid is injected through the nozzle, and
wherein the discharge body includes the power supply unit in which the electric energy is stored, a coupling unit in which the medicinal fluid delivery body is detachably accommodated, and a first terminal provided inside the coupling unit, and an electric wire configured to connect the power supply unit and the first terminal.